POWER QUALITY AND REVENUE METER EM720/EM720T Operation Manual BG0451 Rev.
LIMITED WARRANTY The manufacturer offers the customer a 24-month functional warranty on the instrument for faulty workmanship or parts from date of dispatch from the distributor. In all cases, this warranty is valid for 36 months from the date of production. This warranty is on a return to factory basis. The manufacturer does not accept liability for any damage caused by instrument malfunction.
Do not use the instrument for primary protection functions where failure of the device can cause fire, injury or death. The instrument can only be used for secondary protection if needed. Read this manual thoroughly before connecting the device to the current carrying circuits. During operation of the device, hazardous voltages are present on input terminals. Failure to observe precautions can result in serious or even fatal injury or damage to equipment.
Table of Contents Chapter 1 Introduction ............................................................... 8 Chapter 2 Operating the EM720................................................ 14 Controls and Indicators ........................................................................... 14 TEST Mode ............................................................................................... 15 Device Diagnostics...................................................................................
Setting up Communications ..................................................................... 52 Communicating through a Serial Port ....................................................... 52 Communicating through the Internet ....................................................... 53 Communicating through a GSM/GPRS Modem ........................................... 54 Communicating through a USB ................................................................ 56 Setting Up the Meter......................
Clearing Device Diagnostics................................................................... 130 Resetting Accumulators and Log Files ................................................... 130 Remote Relay Control ............................................................................ 132 Operating Event Flags............................................................................ 133 Upgrading Meter Firmware ....................................................................
Appendix F Data Scales .......................................................... 215 Appendix G Device Diagnostic Codes...................................... 216 Appendix H OBIS Identification Codes ...................................
Chapter 1 Introduction Chapter 1 Introduction The eXpertmeter™ EM720/EM720T The EM720 is especially designed for utility, industrial and commercial billing metering with high requirements to reliability of power quality monitoring and availability of the device.
Chapter 1 Introduction Fast Transient Recorder An optional high-voltage fast transient recorder (EM720T) detects impulsive and low frequency oscillatory transient overvoltages with peaks up to 2kV and durations from 20 microseconds. Digital Fault Recorder An embedded fault recorder is capable of recording fault currents up to 50 amps. Meter Features Billing/TOU • Class 0.2S IEC 62053-22 active energy and class 0.
Chapter 1 Introduction • Harmonic Analyzer: up to 50th harmonic volts and amps; fundamental volts, amps, power and power factor, phasor, symmetrical components Power Quality • EN 50160 Power Quality (PQ) recorder: onboard power quality analyzer; programmable limits; EN 50160 power quality event log, EN 50160 compliance statistics; EN 50160 harmonics survey statistics • Power frequency, voltage variations, rapid voltage changes, IEC 61000-4-15 flicker, voltage dips, interruptions, temporary overvoltages
Chapter 1 Introduction • Synchronized waveforms from multiple devices in a single plot • Exporting waveforms in COMTRADE and PQDIF file formats Data Recorders • Sixteen Data recorders • Programmable data logs on a periodic basis and on any internal and external trigger; triggering from the Fault recorder, PQ recorder or control setpoints; exporting data trends in PQDIF file format • Fast fault and PQ data profiling (trending) triggered from the Fault and PQ recorders: 1/2-cycle to 10-min RMS envelo
Chapter 1 Introduction • Menu-driven setups Digital I/O • Four embedded digital inputs with 1 ms scan time • Replaceable 2DI/2DO expansion I/O modules with 1/2 cycle scan/update time Memory • 8 or 16 Mbyte flash memory for long-term billing, event, waveform and data recording Communications • Front Infrared IEC 62056-21 serial communication port (IEC 62056-21, Modbus RTU/ASCII and DNP3 protocols) • Plug-in serial RS232/RS485 communication port (Modbus RTU/ASCII and DNP3 protocols) • Plug-in ful
Chapter 1 Introduction EM720 Models The EM720 meter series includes two models: • EM720 – basic model - offers all the EM720 billing, instrumentation, control, power quality and fault recording capabilities • EM720T – fast transient model - adds to above a fast transient recorder with a capability of detecting transient overvoltages with peaks up to 2kV and durations of less than 20 microseconds See the EM720 Installation Manual for technical specifications and ordering options.
Chapter 2 Operating the EM720 Controls and Indicators Chapter 2 Operating the EM720 Controls and Indicators Push Buttons The EM720 provides two sealable push buttons that do not have labels. They allow you to scroll through the multi-page display screens for local meter reading, to inspect or change meter setup parameters, and to control display operations. See Navigation Buttons in Chapter 3 for buttons location and functionality.
Chapter 2 Operating the EM720 TEST Mode Rated Voltage, V Secondary Current, A Pulse Rate, imp/kWh 57-120 1 20,000 57-120 5 4,000 120-277 1 12,500 120-277 5 2,500 The LED pulse rate in TEST mode is user-programmable. The factory set defaults and available ranges are shown in the following table. Rated Voltage, V Secondary Current, A Default Pulse Rate, imp/kWh (Wh/imp) Range, imp/kWh (Wh/imp) 57-120 1 20,000 (0.05) 57-120 5 10,000 (0.10) 4,000-100,000 (0.01-0.
Chapter 2 Operating the EM720 Meter Security Indicators in Chapter 3 for information on diagnostics indicators. See Device Diagnostics Display in Chapter 3 on how to inspect the meter diagnostics messages from the display. The device diagnostics status is stored in a non-volatile register, which may be inspected and cleared from the meter display, via the supplemental PAS software, or from a user application.
Chapter 2 Operating the EM720 Meter Clock and Time Synchronization Password Security Level Password 2 Medium Password 3 Access Rights TEST mode. Reset of meter and battery operation time counters, failure counters and pulse counters. Communications setup. I/O operation setup and control. Memory and recorders setup. Billing/TOU system setup. High Meter passwords setup. (Administration Basic device setup. level) Device energy and power options setup. Reset of conventional log files.
Chapter 2 Operating the EM720 Billing and Energy Metering You can monitor the status of batteries from the front display on the Device Info pages (see Device Info Display in Chapter 3) and via the device diagnostics. The auxiliary battery voltage is about 8.2 volts at full charge (for at least 20 hours). If it falls below, then the battery should be checked.
Chapter 2 Operating the EM720 Billing and Energy Metering Energy Counters The EM720 provides instrumentation energy and billing energy metering. Both use the same energy measurement circuitry as a source input for accumulation energies but operate independently. Energy counters have a nine-digit kWh resolution with one decimal place by default. You can set the energy counters to have fewer digits by changing the default energy roll value in your meter (see Device Options and Mode Control in Chapter 5).
Chapter 2 Operating the EM720 Instrumentation Metering The present tariff rate is indicated on the EM720 display. If required, tariff-switching pulses with a programmable duration can be output via the meter relays. End of Billing The EM720 can be configured to trigger a reset of billing maximum demands and an end of billing period automatically on a monthly schedule, manually from the front display and remotely via communications.
Chapter 2 Operating the EM720 Instrument Transformer Correction Voltage and current harmonic measurements are based on 10-cycle/50Hz or 12-cycle/60Hz waveforms (per IEC 61000-4-7), sampled at a rate of 128 samples/cycle. The EM720 uses dynamic sampling techniques to maintain a steady sampling rate and avoid instrumentation errors when the line frequency changes. The meter provides short and measurements as per IEC 61000-4-15.
Chapter 2 Operating the EM720 Power Transformer/Line Loss Compensation NOTES 1. When transformer correction is enabled, it is applied to all instrumentation, billing and power quality calculations and waveforms. 2. Transformer correction does not affect test LED pulse outputs. 3. Transformer correction is not operational in test mode regardless of the option’s status.
Chapter 2 Operating the EM720 Operating Relay Outputs LED Color Status Description IN1, IN2 Yellow Lights The digital input terminals are shorted OUT1, OUT2 Green Lights The normally open relay contacts are closed Fast internal digital inputs are sampled at a 1-ms rate, and expansion inputs are sampled at a 1/2-cycle rate.
Chapter 2 Operating the EM720 Operating the Logical Controller Each relay can be operated either locally from a setpoint in response to an internal or external event, remote command sent through communications, or directly linked to an internal pulse source producing or interval pulses. control or by a can be energy See Configuring Relay Outputs in Chapter 5 on how to configure relay outputs in your meter. See Using Control Setpoints in Chapter 5 on how to operate relay outputs via setpoints.
Chapter 2 Operating the EM720 Operating the Fast Transient Recorder currents while the event continues, using a variable recording rate and variable averaging intervals. See Configuring the EN50160 Recorders in Chapter 5 and EN50160 Evaluation and Recording in Appendix E for more information on configuring and operating the PQ recorder. Operating the Fast Transient Recorder The fast transient recorder is provided with EM720T meters.
Chapter 2 Operating the EM720 Communicating with the EM720 the full list of the available communication modules and communication options. Infrared Port The EM720 has an optical infrared port for local meter reading via a hand-held unit or a portable PC. The IR port can be equipped with an IEC- or ANSI-compatible optical head on your selection. The IR port is identified in the EM720 as port COM1.
Chapter 2 Operating the EM720 Communicating with the EM720 Ethernet Connection An optional 10/100Base-T Ethernet/USB module provides a direct connection of the EM720 to the Ethernet.
Chapter 2 Operating the EM720 Communicating with the EM720 GSM/GPRS Wireless Communication An optional GSM/GPRS modem can be provided with the EM720 for wireless communications via a cellular GPRS network. It is identified by the EM720 as port COM2. A GSM/GPRS module may only be installed into expansion slot 3.
Chapter 2 Operating the EM720 Auxiliary AC/DC Backup Power Supplies USB Communications An optional Ethernet/USB module provides a full speed 12Mbit USB 1.1 port for local communications with the support PAS software. The USB module can be installed in the expansion slot 1 or 2. USB communications does not require any settings.
Chapter 3 Using Front Display Display Operations Chapter 3 Using Front Display Display Operations The EM720 has a high-contrast graphical LCD display with backlight for local data read outs, meter setup and servicing. The display operates in two modes: • Multi-page data display mode with Auto-Scroll feature allows you to scroll through display screens and pages to view various billing, instrumentation and status data.
Chapter 3 Using Front Display Display Operations • In data display mode, it scrolls through the display pages. • In programming mode, it scrolls through the menu items and allows changing a selected digit when entering numbers. The SELECT/ENTER button normally operates once it’s released.
Chapter 3 Using Front Display Display Operations Use a short press on the SELECT/ENTER button to scroll through displays. Use a short press on the SCROLL button to scroll through the pages. Status Indicators Graphical icons at right give immediate indication and show the present tariff rate.
Chapter 3 Using Front Display Display Operations Low General diagnostic message indicator: indicates that there are diagnostic messages you can inspect via the DIAGNOSTICS display. The icon is shut down after you explicitly reset diagnostics messages either from the display or via communications (see Clearing Device Diagnostics). You can disable diagnostic message indicator via the Display Setup menu (see Display Setup).
Chapter 3 Using Front Display Display Operations The backlight is not operational if voltages are missing on meter terminals while the meter is powered from the battery. Auto-Return If the Auto-Return feature is enabled and no button is pressed for the programmable Auto-Return interval (1 to 30 minutes for data displays; fixed at 5 minutes for setup menus), the display automatically returns to the default page from any other data display or a setup menu.
Chapter 3 Using Front Display Data Displays Data Displays The EM720 has 9 multi-page data displays listed in the following table. Display Number Display Label 1 BILL 0 Display Contents 2 BILL 1 Last (-1) billing period data 3 BILL 2 Second previous (-2) billing period data 4 BILL 3 Third previous (-3) billing period data 5 MAX.
Chapter 3 Using Front Display Data Displays (see Configuring Billing/Tariff Registers and Configuring the Daily Tariff Schedule in Chapter 5). The order of pages is shown in the following table.
Chapter 3 Using Front Display Data Displays Total energy reading of register 2 – exported kWh. Total energy reading of register 3 – imported (inductive) kvarh. Total energy reading of register 4 – exported (capacitive) kvarh. Tariff 1 energy reading of register 1 – imported kWh. Tariff 2 energy reading of register 1 – imported kWh. … … Tariff 3 energy reading of register 4 – exported kvarh. Total maximum demand reading of register 1 – imported kW.
Chapter 3 Using Front Display Data Displays Total cumulative maximum demand reading of register 4 – exported kvar. Tariff 1 cumulative maximum demand reading of register 1 – imported kW. … … Tariff 3 cumulative maximum demand reading of register 4 – exported kvar. Previous Billing Period Data The following example demonstrates billing displays for the three previous billing periods. Displays for the last billing period (BILL 1) and for two preceding billing periods (BILL 2) and (BILL 3) look the same.
Chapter 3 Using Front Display Data Displays Total maximum demand reading of register 1 – exported kW. … … Tariff 1 maximum demand reading of register 1 – imported kW. Tariff 2 maximum demand reading of register 1 – imported kW. … … Total cumulative maximum demand reading of register 1 – imported kW. Total cumulative maximum demand reading of register 1 – exported kW. … … Tariff 1 cumulative maximum demand reading of register 1 – imported kW.
Chapter 3 Using Front Display Data Displays kvar import (inductive) maximum demand kVA maximum demand kW export maximum demand kvar export (capacitive) maximum demand V1 maximum demand Indicate V12 voltage in line-to-line configurations.
Chapter 3 Using Front Display Data Displays I3 THD maximum demand Engineering Data Display Engineering data represent general instrumentation data you can use while installation and inspecting the meter. Use phase angles displays to check the order of phases when connecting wires to the meter terminals. Phase-to-neutral voltages. Only displayed in 4-wire configurations with a neutral.
Chapter 3 Using Front Display Data Displays Long-term flicker Voltage phase angles (relative to V1 voltage). Indicate phase-to-phase voltage angles in line-toline configurations. Phase current phase angles (relative to V1 voltage) Auxiliary current phase angle (relative to V1 voltage) Setup Data Display The setup data display shows basic device settings that can be required for immediate inspecting while meter testing and at the time of installation.
Chapter 3 Using Front Display Data Displays Meter identification info: serial number, production date and calibration date Meter operation time counters (since start of operation): Start of operation date Total operation time in hours Out of service time in hours Power failure counters (since start of operation): Total number of power failures Total number of 3-phase voltage interruptions Internal meter temperature Lithium battery status and operation time: Battery status Battery replacement date Total op
Chapter 3 Using Front Display Data Displays If there are more pages, use a short press on the SCROLL button to scroll through the entire list of messages. Extended press SCROLL + SELECT/ENTER is a shortcut for immediate entering the diagnostics reset menu. If there are diagnostic messages, the (i) diagnostic icon at right on the display flashes until you clear the device diagnostics. Some of the diagnostics events are cleared automatically as the event source disappears.
Chapter 3 Using Front Display Programming Mode Programming Mode To enter programming mode from the data display, press and hold the SELECT/ENTER button for more than 5 seconds. Navigation Buttons The following table gives a summary of the button operations in programming mode.
Chapter 3 Using Front Display Programming Mode Once the password is set to the desired value, press and hold the SELECT/ENTER button for more than 1 second. If the password you entered is correct, you move to the main device menu, otherwise you return back to the data display. Setup Menus and Access Rights The EM720 setup is menu-driven. The meter provides 12 menus that allow local accessing a limited number of meter setups and control functions listed in the following table.
Chapter 3 Using Front Display Programming Mode Once you entered a submenu, the left window is still showing the menu name, while the upper-right window represent a submenu options list, and the lower-right window indicates the present option value. To select an option you want to view or change: ENTER LONG PRESS Use the SCROLL button to scroll through the option list until the desired option’s name appears in the window. To change the selected option’s value: 1.
Chapter 4 Using PAS Software Software Installation Chapter 4 Using PAS Software The support PAS software is a configuration and data acquisition tool that allows you to configure all of the EM720 features, monitor your meter on-line, retrieve recorded files and view reports. PAS can communicate with your meter via any communication interface installed in your meter, including the embedded infrared port, serial ports, and the Ethernet and wireless GSM/GPRS communications.
Chapter 4 Using PAS Software Software Installation Connect the EM720 to your PC’s USB port using the supplied USB cable. When the EM720 is powered up, Windows automatically detects the meter and launches the hardware installation wizard. The following example demonstrates an installation of the USB driver on Windows XP. 1. The "Found New Hardware Wizard" dialog box is displayed as follows. 2. Select “Install from a list or specific location” and click “Next”. 3. Click “Browse”.
Chapter 4 Using PAS Software Software Installation 4. Point to the “USB” folder located in the PAS installation directory and click “OK” 5. Click “Next”. 6. Click "Finish" to complete installation.
Chapter 4 Using PAS Software Creating a New Site for your Meter The next time you power up the EM720 or connect it to your PC with the USB cable, Windows automatically launches the driver for your meter. Creating a New Site for your Meter PAS keeps all communication and configuration data for your meter in a configuration database called a site database.
Chapter 4 Using PAS Software Setting up Communications “Sites” directory. Type a site name for your device in the “File name” box, click New, and then click OK. 4. On the Instrument Setup tab, select “EM720” in the “Model” box. PAS automatically selects the appropriate instrument options for your meter. 5. Select a correct CT secondary current (5A or 1A) for your meter. 6. If you wish to add any comments for your meter, type them into the “Comment” box.
Chapter 4 Using PAS Software Setting up Communications Selecting the Communications Protocol 1. On the Connection tab, click Protocol. 2. In the “Protocol” box, select the same communications protocol as you have set in your device. 3. The remaining settings in this dialog do not normally need to be changed. 4. In the “Response Time-out” box, define the maximum time that PAS should wait for the meter response before announcing a failure.
Chapter 4 Using PAS Software Setting up Communications 4. In the “Protocol” box, select the communications protocol for the TCP port. The meter provides Modbus/TCP connections on TCP port 502 and DNP3/TCP connections on port 20000. The host port is set automatically as you select the protocol. Select “Modbus RTU/TCP” for Modbus/TCP or “DNP3” for DNP3/TCP. 5.
Chapter 4 Using PAS Software Setting up Communications 3. Click on the “IP address” and type in the IP address your meter got from the GPRS provider when registering on the GPRS network. You can find the meter GPRS IP address on the GPRS page in the Device Info display (see Device Info Display in Chapter 3) or via the Dial-Up Networking setup dialog in PAS (see Modem/GPRS IP Address in Setting-Up Dial-Up GPRS Network in Chapter 5) 4.
Chapter 4 Using PAS Software Setting up Communications 2. Click Dial. Communicating through a USB On the Instrument Setup tab, click USB Port, and then click OK.
Chapter 4 Using PAS Software Setting Up the Meter Setting Up the Meter PAS allows you to prepare setup data for your meter off-line without the need to have it connected to your PC. To prepare a setup for your meter: 1. Select the device site from the list box on the PAS toolbar. 2. Select the desired setup group from the Meter Setup menu. Click on the tab with the setup you want to create or modify. 3. Fill in the boxes with the desired configuration data for your meter. 4.
Chapter 4 Using PAS Software Setting Up the Meter Downloading Setups to the Meter You can update each setup in your meter one at a time or download all setups together from the site database. Individual Download To update a particular setup in your meter: 1. Check the On-line button on the PAS toolbar 2. Select a meter site from the list box on the toolbar. 3. Select the desired setup group from the Meter Setup menu. Click on the setup tab you want to download to the meter.
Chapter 4 Using PAS Software Authorization and Security 2. Select the device site from the list box on the toolbar. 3. Select Upload Setups from the Meter Setup menu. NOTE The passwords setup is never uploaded via the Batch Upload and may not be read from the meter. When you open the Passwords setup dialog, all passwords are zeroed. Authorization and Security Every time you try to send the setup data to the meter, you are prompted for the password. Enter the password and click OK.
Chapter 5 Configuring the EM720 Configuring Communications Chapter 5 Configuring the EM720 This chapter describes how to configure the EM720 for your particular environment and application from the front display and via PAS. To access your meter configuration options via PAS, you should create a site database for your device as shown in Chapter 4. Configuring Communications Setting Up Serial Communication Ports Using the Front Display Select COM1 through COM3 from the main menu.
Chapter 5 Configuring the EM720 Display Label Parameter Configuring Communications Options Default Description Protocol Communication protocol Modbus RTU, Modbus ASCII, DNP3, IEC 62056-21 IEC 62056-21 (COM1) Modbus RTU (COM 3) The communications protocol for the port Interface Port interface RS232, RS485, IR, GPRS IR (COM1) GPRS (COM2) RS485 (COM3) Not changeable; automatically detected by the meter Address Device address Modbus: 1-247 DNP3: 0-65532 IEC 62056-21: 0-65532 1 Device network
Chapter 5 Configuring the EM720 Configuring Communications Setting Up the Ethernet Using the Front Display Select Net from the main menu. See Viewing and Changing Setup Options in Chapter 3 for information on navigating in menus. See the table below for available network options. Using PAS Select Communications Setup from the Meter Setup menu, and then click on the Network Setup tab. The following table lists available network options. Display Label IP Address Parameter Device IP Address Default 192.
Chapter 5 Configuring the EM720 Configuring Communications Setting-Up Dial-Up GPRS Network Select Communications Setup from the Meter Setup menu, and then click on the Dial-Up Networking Setup tab. The following table lists available connection options. Parameter Options Default Description Connection Options IP Address 192.168.10.203 The IP address on the dial-in modem PPP network. Not used in a GPRS network. Network Subnet Mask 255.255.0.
Chapter 5 Configuring the EM720 Parameter Configuring Communications Options Default Description ISP Account Phone Number *99# The telephone number of the ISP provider. The default number provides a connection to the GPRS network for your EM720 GSM/GPRS modem. Login Name Login name for logging onto the Internet (if required). Login Password Login password for logging onto the Internet (if required).
Chapter 5 Configuring the EM720 Parameter Configuring Communications Options Default Description SNTP Client Enabled NO, YES NO Enables operations of the SNTP client Polling interval, s 60-86400 s 600 s The time remaining requesting time from the SNTP server Primary SNTP Server IP Address 192.36.143.151 The IP address of the primary SNTP server Secondary SNTP Server IP Address 130.149.17.
Chapter 5 Configuring the EM720 Configuring Communications Parameter Options XPW Server IP Address Default Description 207.232.60.
Chapter 5 Configuring the EM720 Configuring Communications The following table lists available options. Parameter Client Enabled Options NO, YES Server IP Address Default Description NO Enables operations of the notification client 192.168.0.
Chapter 5 Configuring the EM720 General Meter Setup General Meter Setup Basic Meter Setup The Basic Setup provides the meter with basic information about your electrical network. Using the Front Display Select Basic from the main menu. See Viewing and Changing Setup Options in Chapter 3 for information on navigating in menus. See the table below for available options. Using Pas Select General Setup from the Meter Setup menu. The following table lists available meter configuration options.
Chapter 5 Configuring the EM720 Display Label General Meter Setup Parameter Nom. Voltage PT Secondary (L-L) Voltage CT Primary CT Primary Current CT4 Primary Nom. Freq. Options Default Description 50-480 V 400 V The nominal secondary line-toline voltage. Used as a reference voltage for the EN50160 evaluation.
Chapter 5 Configuring the EM720 General Meter Setup Device Options and Mode Control Using the Front Display To enter the common options setup menu, select Options from the main menu. To enter the TEST mode options setup, select Test from the main menu. You can also use an extended press on the SCROLL + SELECT/ENTER buttons from the clock display as a shortcut for immediate entering the TEST mode setup. See Viewing and Changing Setup Options in Chapter 3 for information on navigating in menus.
Chapter 5 Configuring the EM720 Display Label General Meter Setup Parameter Options Default Description Power/Energy Options Power Mode Power Calculation Mode S=f(P, Q) (reactive S=f(P, Q) power mode), Q=f(S, P) (nonactive power mode) The method used for calculating reactive and apparent powers (see “Power Calculation Modes” below) Energy Roll Energy Roll Value, kWh 1000.0 10000.0 100000.0 1000000.0 10000000.0 100000000.0 100000000.
Chapter 5 Configuring the EM720 General Meter Setup volts, and THD < 10% for currents. In networks with high harmonics, the following method is preferable. 3.
Chapter 5 Configuring the EM720 General Meter Setup Instrument Transformer Correction Setup Transformer correction allows you to compensate ratio and phase angle inaccuracies of the voltage and current instrument transformers. Select General Setup from the Meter Setup menu, and then click on the Transformer Correction tab. The available options are listed in the following table.
Chapter 5 Configuring the EM720 General Meter Setup The order in which you define the test points does not matter. The meter will automatically arrange all data in a correct order. Check the Correction Enabled box to activate transformer correction in the meter. You can also enable and disable transformer correction from the front display (see Device Options and Mode Control).
Chapter 5 Configuring the EM720 Parameter General Meter Setup Options Billing Point Location Supply side, far end, Supply side, transformer end, Load side, transformer end, Load side, far end Number of Metering Elements 2 (Open Delta) 3 (WYE) Description Defines the location of the billing point: far end – near the supply source or near the load, transformer end – near the power transformer. Defines the number of metering elements in the meter depending on the wiring mode.
Chapter 5 Configuring the EM720 Billing Point General Meter Setup Supply side, far end Metering Point Supply side, far end Supply side, transformer end Load side, transformer end Load side, far end -Supply line losses -Supply line losses -Transformer losses -Supply line losses -Transformer losses -Load line losses -Transformer losses -Load line losses -Transformer losses Supply side, transformer end +Supply line losses Load side, transformer end +Supply line losses +Transformer losses +Transfo
Chapter 5 Configuring the EM720 General Meter Setup The available options are listed in the following table. Display Label Parameter Options Default Description Country Country Default, or country name Default Indicates the location of the meter. The default setting stands for the U.S.A. Offset Time zone offset, min -720 to 720 min 120 Local offset in minutes from UTC (Universal Coordinated or Greenwich Mean Time). Required if the GPS IRIG-B or SNTP synchronization is selected.
Chapter 5 Configuring the EM720 Display Label General Meter Setup Parameter Options End Day DST End Day SundaySaturday End Hour DST End Hour Date Order Date Order Clock Sync Time synchronization input Default Description Sunday The day when DST ends. 1-6 2 The hour when DST ends.
Chapter 5 Configuring the EM720 General Meter Setup When the signal is restored, the meter automatically acquires the GPS time. Whenever the IRIG-B signal status or quality changes, the corresponding event is automatically recorded to the device Event log. You can check presence and quality of the IRIG-B signal via the device diagnostics display (see Device Diagnostics Display in Chapter 3) or via PAS (see Clearing Device Diagnostics in Chapter 6).
Chapter 5 Configuring the EM720 General Meter Setup Display Setup Using the Front Display Select Display from the main menu. See Viewing and Changing Setup Options in Chapter 3 for information on navigating in menus. See the table below for available display options. Using PAS Select General Setup from the Meter Setup menu, and then click on the Display Setup tab. The available options are listed in the table below.
Chapter 5 Configuring the EM720 Display Label General Meter Setup Parameter Options Default Description Auto-Scroll Auto-Scroll Interval Disabled, 2-10, 15, 20, 25, 30 seconds Scroll Seq.
Chapter 5 Configuring the EM720 General Meter Setup Configuring Digital Inputs The EM720 has four embedded digital inputs (DI1 to DI4) and supports up to two expansion 2DI/2DO modules with a total of 4 digital inputs (DI5 to DI8). I/O numbers are automatically assigned to the inputs in the order of connection. If you insert an I/O module into another slot position and do not change its order, then all digital inputs on the module retain their I/O numbers.
Chapter 5 Configuring the EM720 Parameter Options General Meter Setup Default Description Debounce time 1-1000 ms 10 ms The amount of time while the state of the digital input should not change to be recognized as a new state. Too low debounce time could produce multiple events on the input change. Fault Recorder Checked Unchecked Unchecked When the box is checked, a positive transition on the digital input (open to closed transition event) triggers the Fault recorder.
Chapter 5 Configuring the EM720 General Meter Setup Configuring Relay Outputs The EM720 supports up to two expansion 2DI/2DO modules with a total of 4 relays (RO1 through RO4). I/O numbers are automatically assigned to outputs in the order of connection. To configure the relay outputs in your meter, select General Setup from the Meter Setup menu, and then click on the Relay Outputs tab. Relays that are not present in your meter are not shown. The available relay options are described in the table below.
Chapter 5 Configuring the EM720 Parameter General Meter Setup Options Default Description Polarity NORMAL (N.O.) INVERTING (N.C.) NORMAL Normal polarity: the relay is normally deenergized in its non-active state and is energized in its active (operated) state. Inverting polarity: the relay is normally energized in its non-active state and is deenergized in its active (operated) state. It is called failsafe relay operation. Retentive mode NO YES NO Applicable for latched relays only.
Chapter 5 Configuring the EM720 General Meter Setup Using Counters The EM720 provides 8 universal nine-digit counters that can count different events. Each counter can be independently linked to any digital input and count input pulses with a programmable scale factor. You can link a number of digital inputs to the same counter. Each counter can also be incremented through the Control Setpoints in response to any internal or external event.
Chapter 5 Configuring the EM720 General Meter Setup Using Periodic Timers The EM720 has 4 programmable interval timers that are normally used for periodic recording and triggering operations on a time basis through the Control Setpoints. Whenever a programmed timer interval is expired, the timer generates an internal event that can trigger any setpoint (see Using Control Setpoints). The programmable time interval can be from 1 cycle and up to 24 hours. Though it is defined in 0.
Chapter 5 Configuring the EM720 General Meter Setup Using Control Setpoints The EM720 has an embedded logical controller that runs different actions in response to user-defined internal and external events. Unlike a PLC, the EM720 uses a simplified programming technique based on setpoints that allows the user to define a logical expression based on measured analog and digital values that produces a required action. The EM720 provides 16 control setpoints with programmable operate and release delays.
Chapter 5 Configuring the EM720 Option General Meter Setup Format/Range Description Operate limit The threshold (in primary units) at which the conditional expression would be evaluated to true. Not applicable for digital triggers. Release limit The threshold (in primary units) at which the conditional expression would be evaluated to false. Defines the hysteresis for analog triggers. Not applicable for digital triggers.
Chapter 5 Configuring the EM720 General Meter Setup Using Numeric Triggers For numeric (analog) triggers, a setpoint allows you to specify two thresholds for each trigger to provide hysteresis (dead band) for setpoint operations. The Operate Limit defines the operating threshold, and the second Release Limit defines the release threshold for the trigger. The trigger thresholds are always specified in primary units.
Chapter 5 Configuring the EM720 General Meter Setup setpoint triggers. When the setpoint event is asserted, the timer is restarted, and then generates the next timer event when the timer interval expires. If you wish to record interval data at predefined intervals without linking to other events, just select a timer as a setpoint trigger and specify in the setpoint actions list a data log file you want to use for recording.
Chapter 5 Configuring the EM720 General Meter Setup same target. The exceptions are relay operations, data logging and waveform logging that are shared between all setpoints using an OR scheme for each separate target. A relay output is operated when one of the setpoints linked to the relay is activated and stays in the operated state until all of these setpoints are released (except for latched relays that require a separate release command to be deactivated).
Chapter 5 Configuring the EM720 Configuring Billing/TOU Configuring Billing/TOU The EM720 provides 10 universal billing energy registers that can be linked to any internal energy source or to any external pulse source that delivers pulses through the device digital inputs. Any of energy registers can provide either a single-tariff energy accumulation or be individually linked to the TOU system providing both total and multi-tariff energy billing.
Chapter 5 Configuring the EM720 Configuring Billing/TOU Configuring Billing/Tariff Registers Select Energy/TOU from the Meter Setup menu.
Chapter 5 Configuring the EM720 Parameter Options Configuring Billing/TOU Default Description Channel No, Ch1-Ch6 None Defines a measurement channel for multimeter energy metering. Not used for a single self-metering channel if there are no external sources. Set to Ch1 for internal energy sources, and to Ch2 through Ch6 for external sources in the event of multichannel energy metering.
Chapter 5 Configuring the EM720 Configuring Billing/TOU The daily profile setup allows you to specify the daily tariff change points with a 15-minute resolution for 4 seasons using 4 different daily schedules for each season. To configure your daily profiles: 1. Select the desired season and day type. 2. Select the start time for each tariff change point and the corresponding active tariff number. 3. Repeat the setup for all active profiles.
Chapter 5 Configuring the EM720 Configuring Billing/TOU order that is convenient for you, based on simple intuitive rules. There are no limitations on how to define your schedule. The meter is able to automatically recognize your settings and to select a proper daily tariff schedule for any day within a year. The above picture gives you an example of a single-season tariff schedule configured for weekends and the designated U.S.A. holidays. To configure your season tariff schedule: 1.
Chapter 5 Configuring the EM720 Configuring Recorders Configuring Recorders The EM720 is provided with an 8-MByte or 16-MByte flash memory for data, event and waveform recording. The meter memory is fully configurable except of the files that keep monthly and daily billing profiles and energy load profile. They are pre-configured at the factory and may not be changed by the user.
Chapter 5 Configuring the EM720 Option Configuring Recorders Range Description Sections/Channels 0-20 The numbers of sections in a multi-section profile data log file, or the number of recording channels in a waveform log file Num. of Records 0-65535 Allocates the file memory for predefined number of records Record size Parameters The size of the file record for a single channel or a single section.
Chapter 5 Configuring the EM720 Configuring Recorders The following table can help you calculate an estimated file size for conventional log files when planning your memory allocation. The actual file size will normally be a bit bigger.
Chapter 5 Configuring the EM720 Configuring Recorders Configuring the Event Recorder To configure the Event log file: 1. Double click on the Event Log file partition with the left mouse button. 2. Select a desired file type for your file. 3. Select the maximum number of records you want to be recorded in the file. 4. Click OK, then send your new setup to the meter or save to the device database.
Chapter 5 Configuring the EM720 Configuring Recorders 2. Select a partition type for your file. 3. Select the number of parameters you want to be recorded in the file records. 4. Select the maximum number of records you want to be recorded in the file. 5. Click OK, and then send your new setup to the meter, or save to the device database. To define the contents of the file: 1.
Chapter 5 Configuring the EM720 Configuring Recorders 3. For your convenience, PAS follows your selection and helps you configure a series of the neighboring parameters: when you open the “Group” box for the next parameter, PAS highlights the same group as in your previous selection; if you select this group again, PAS automatically updates the “Parameter” box with the following parameter in the group. 4. Add the name for your data log file in the “Name” box. It will appear in the data log reports. 5.
Chapter 5 Configuring the EM720 Configuring Recorders Data Log #2 No. Parameter 1 V1/V12 Demand 2 V2/V23 Demand 3 V3/V31 Demand 4 I1 Demand 5 I2 Demand 6 I3 Demand 7 kW Import Sliding Demand 8 kvar Import Sliding Demand 9 10 KVA Sliding Demand kWh Import 11 kWh Export 12 kvarh Import 13 kvarh Export 14 kVAh 15 In 16 Frequency Data Log #13 Data Log #13 is linked to the Fault recorder and is configured for fast 1/2-cycle RMS profiling of fault events.
Chapter 5 Configuring the EM720 Configuring Recorders Data Log #14 No. Parameter 1 Generic voltage V1/V12 2 Generic voltage V2/V23 3 Generic voltage V3/V31 4 Generic current I1 5 Generic current I2 6 Generic current I3 7 Generic current I4 8 Generic frequency EN50160 Statistics Data Logs Data log #9 and Data log #10 are pre-configured for recording EN50160 compliance statistics and harmonics survey data. See EN50160 Statistics Log Files in Appendix D for the file layout and contents.
Chapter 5 Configuring the EM720 Configuring Recorders Configuring the Waveform Recorder The EM720 can store waveforms in three log files. Configurable waveform log files #1 and #2 can record waveforms at four programmable sampling rates: 32, 64, 128 or 256 samples per cycle. A log file can store up to 7 channels simultaneously (three voltage channels and four current channels) with a programmable length and up to 20 pre-event cycles. Waveform log #3 is pre-configured for fast transient recording.
Chapter 5 Configuring the EM720 Configuring Recorders 2. Select a file type for your file. 3. Select the number of channels for simultaneous recording in the file to define the file record size. 4. Select the maximum number of records you want to be recorded in the file.
Chapter 5 Configuring the EM720 Configuring Recorders The following table lists available waveform options. Parameter Recording Time Options Description Fixed Event-controlled Fixed – a waveform is recorded up to the maximum specified length Event-controlled – a waveform extends for as long as trigger conditions exist plus post-event time, or up to the maximum specified length Samples per Cycle 32, 64, 128, 256, 1024 Waveform sampling rate Max.
Chapter 5 Configuring the EM720 Configuring Recorders 5. Save your waveform setup to the device database, and then send it to the meter.
Chapter 5 Configuring the EM720 Configuring Recorders Configuring the Fault Recorder The Fault recorder automatically records all fault events to the Fault log file. It can be triggered via the embedded fault detector, or externally through any of the 8 digital inputs. The Fault recorder can be globally disabled or enabled in your meter.
Chapter 5 Configuring the EM720 Option Configuring Recorders Range Default Description Hysteresis, % 0-50.0% 5.0 Defines the hysteresis for a fault trigger in percent of the threshold Trigger Enabled Checked Unchecked Checked Links a fault trigger to the Fault Recorder. If the box is unchecked, the Fault Recorder does not respond to the trigger. On Start Checked Unchecked Checked On End Checked Unchecked Unchecked Enables waveform log when the fault event ends Log No.
Chapter 5 Configuring the EM720 Configuring Recorders adjust the thresholds according to your network conditions before enabling triggers. The Current Unbalance trigger has a different calculation algorithm than the common current unbalance measurements. Since the unbalance readings give a relation of the maximum deviation from the average to the phase average current, the value could produce high readings for low currents.
Chapter 5 Configuring the EM720 Configuring the EN50160 Recorders Configuring the EN50160 Recorders See EN50160 Evaluation and Recording in Appendix E for information on EN50160 evaluation techniques. Basic Device Settings The following device settings affect the EN50160 evaluation and should be checked prior to running the EN50160 recorders.
Chapter 5 Configuring the EM720 Configuring the EN50160 Recorders can be selected independently from the EN50160 compliance evaluation. You can upload and view the harmonics survey data collected by your device via PAS reports or via common PAS data logs views. EN50160 Power Quality Event Log The EM720 provides the EN50160 Power Quality (PQ) recorder that can detect EN50160 incidents and record each individual power quality event to the log file with the start and end timestamps and a fault magnitude.
Chapter 5 Configuring the EM720 Configuring the EN50160 Recorders To configure the PQ recorder: 1. Select Memory/Log from the Meter Setup menu, and then click on the EN50160 PQ Recorder tab. 2. Adjust thresholds and hysteresis for PQ triggers if required. The harmonic and interharmonic voltage limits can be individually set for each harmonic order via the EN50160 Harmonics Setup. Limits for the signaling voltage frequencies are automatically taken from the “Meister-curve”. 3.
Chapter 5 Configuring the EM720 Option Configuring the EN50160 Recorders Range Default Description PQ Log Threshold, % 0-200.0% Defines the operating threshold for a PQ trigger in percent of the nominal (reference) value Hysteresis, % 0-50.0% Enabled Checked Unchecked On Start Checked Unchecked Checked Enables waveform log when a PQ event starts On End Checked Unchecked Unchecked Enables waveform log when a PQ event ends Log No. 1-2 5.
Chapter 5 Configuring the EM720 Configuring the EN50160 Recorders the PQ recorder, then a second longer waveform will be also recorded, synchronized with the fast transient waveform. You can temporary disable the PQ recorder in your device. To enable or disable the PQ recorder: 1. Check or uncheck the Recorder Enabled checkbox. 2. Send your setting to the device. Note that disabling the PQ recorder in your meter does not affect the evaluation and recording of the EN50160 statistics.
Chapter 5 Configuring the EM720 Configuring the EN50160 Recorders 3. Download your setup to the device. The default EN50160 compliance limits are shown in the picture above. You can change the number of the evaluated harmonics and interharmonics via the EN50160 Advanced Setup. EN50160 Advanced Setup The EN50160 Advanced Setup allows you to configure the EN50160 evaluation options in your meter. To configure the EN50160 evaluation options: 1.
Chapter 5 Configuring the EM720 Option Configuring the EN50160 Recorders Range Default Description Rapid Voltage Changes Repetition Rate 1-10 1 Defines the maximum repetition rate in variations per hour (equal or less than) for rapid voltage changes. Voltage changes at higher rates are not classified since they will be subject for flicker. Pst Period 1-10 min 10 min THD, up to order 25-50 40 Defines the highest harmonic order included in the THD evaluation.
Chapter 5 Configuring the EM720 Configuring Communication Protocols Configuring Communication Protocols This section describes how to customize protocol options for use with your application software. Configuring Modbus Modbus Point Mapping The EM720 provides 120 user assignable registers in the address range of 0 to 119.
Chapter 5 Configuring the EM720 Configuring Communication Protocols 4. Click Send to download your setup to the device. Configuring DNP3 DNP Options can be changed both via DNP3 and Modbus. Refer to the EM720 DNP3 Reference guide for information on the protocol implementation and a list of the available data points. DNP Options From the Meter Setup menu select Protocol Setup and click on the DNP Options tab. The following table describes available DNP options.
Chapter 5 Configuring the EM720 Parameter Configuring Communication Protocols Options Default Description Analog Input Object 32-bit 32-bit –Flag 16-bit 16-bit –Flag 16-bit -Flag Analog Input Change Event Object 32-bit 32-bit 16-bit 16-bit 16-bit +Time The default AI change event object variation for requests with qualifier code 06 when no specific variation is requested -Time +Time -Time +Time The default AI object variation for requests with qualifier code 06 when no specific variation is reque
Chapter 5 Configuring the EM720 Configuring Communication Protocols Scaling 16-bit AI objects Scaling 16-bit AI objects allows accommodating native 32-bit analog input readings to 16-bit object format; otherwise it may cause an over-range error if the full-range value exceeds a 16-bit point limit. Scaling is enabled by default. It is not applied to points that are read using 32-bit AI objects.
Chapter 5 Configuring the EM720 Configuring Communication Protocols Configuring DNP Event Classes The EM720 generates object change events for any static analog input, binary input, and binary counter point when a corresponding point either exceeds a predefined threshold, or the point status changes. A total of 64 change event points are available for monitoring. Object change events are normally polled via DNP Class 1, Class 2 or Class 3 requests.
Chapter 5 Configuring the EM720 Configuring Communication Protocols The number of event setpoints for each static object type is specified via the DNP Options setup. NOTE The device clears all event buffers and links the default set of static points to each event object type every time you change the number of points for any of the objects. To define setpoints for selected static points: 1. Check the “Ext” box if you wish to use the extended point list. 2.
Chapter 5 Configuring the EM720 Configuring Communication Protocols predefined return hysteresis – applicable for AI objects. Hysteresis for the return threshold is 0.05 Hz for frequency and 2% of the operating threshold for all other points. 4. Check the “Ev On” box for the points you wish to be included into event poll reports. 5. In the “Ev Class” box, select the event poll class for the change event points. 6. Repeat these steps for all points you want to be monitored for events. 7.
Chapter 5 Configuring the EM720 Configuring Meter Passwords Configuring Meter Passwords Using the Front Display Select Access from the main menu. You should have administration rights to enter this menu. See Viewing and Changing Setup Options in Chapter 3 for information on navigating in menus. The setup menu allows you to configure three passwords for three security levels the meter provides. To setup the meter passwords: 1. Use the SCROLL button to scroll through the passwords. 2.
Chapter 5 Configuring the EM720 Configuring Meter Passwords To setup a password online: 1. From the Monitor menu, select Administration -> Change Password, and then click on the password you wish to change. 2. Enter the new password and repeat it in the following “Confirm new password” box. 3. Click Send to update the password in the meter.
Chapter 6 Device Control and Upgrading Updating the Meter Clock Chapter 6 Device Control and Upgrading This chapter describes how to perform control functions in your meter from the front panel display and via PAS. To access device control options from PAS, you should have your meter online and provide a correct password with respective permissions. Updating the Meter Clock Using the Front Display To enter the clock setup menu, select RTC from the main menu.
Chapter 6 Device Control and Upgrading Clearing Device Diagnostics Clearing Device Diagnostics Using the Front Display See the following section Resetting Accumulators and Log Files on how to clear the device diagnostics from the front display. Using PAS Via PAS, you can both examine diagnostics status, and clear it. the present device To enter the Device Diagnostics dialog, select Device Control from the Monitor menu, and then click on the Device Diagnostics tab.
Chapter 6 Device Control and Upgrading Resetting Accumulators and Log Files Access to the RESET menu entries is allowed depending on your security level as shown in the following table. Clearing files is not allowed from the front display.
Chapter 6 Device Control and Upgrading Remote Relay Control To reset the accumulation counters or to clear a file: 1. Click on the corresponding button. If a reset entry has more than one target, you are allowed to select targets from the dialog box. 2. Check the corresponding boxes, and then click OK. 3. Confirm your command to send it to the meter.
Chapter 6 Device Control and Upgrading Operating Event Flags To enter the dialog box, select Device Control from the Monitor menu, and then click on the Remote Relay Control tab. To send a remote command to the relay: 1. From the “Relay Command” box for the relay, select the desired command. 2. Click on Send. The dialog shows you the present relay status and whether it is latched by a remote command or locally from the setpoint.
Chapter 6 Device Control and Upgrading 134 Operating Event Flags EM720 Power Quality and Revenue Meter
Chapter 6 Device Control and Upgrading Upgrading Meter Firmware Upgrading Meter Firmware You can upgrade device firmware through any communication port installed in your meter: a serial port, USB, wireless GSM/GPRS modem, or via the Internet. Downloading firmware is only supported through the Modbus RTU/ASCII and Modbus/TCP protocols. If you are connected to the meter via a serial port, ensure that it operates in Modbus mode. It is also recommended to set the serial port baud rate to 115,200 bps.
Chapter 6 Device Control and Upgrading Upgrading Meter Firmware 5. Wait about 10 seconds until the meter completes burning firmware into the flash and reboots before any further manipulating with the meter. NOTES 1. When the meter reboots, the Ethernet and GPRS networks are both restart, so communications may be temporarily lost. You may need to wait a short duration before PAS restores a connection with your meter. 2.
Chapter 7 Monitoring Meters Viewing Real-time Data Chapter 7 Monitoring Meters Viewing Real-time Data Real-time data is continuously retrieved from your devices and updated on the screen at the rate you defined in the Instrument Setup. To get real-time data from your device: 1. Ensure that the On-line button on the PAS toolbar is checked. 2. Select the device site from the list box on the PAS toolbar. 3. Point to RT Data Monitor on the Monitor menu, and then select a data set you want to view.
Viewing Real-time Data Chapter 7 Monitoring Meters Polling Devices To run data polling, click on either the Poll button Continuous Poll button Stop button or on the local toolbar. Click on the to stop continuous polling. You can open as many monitor windows as you wish, either for different sites, or for the same site using different data sets. An open data monitor window is linked to the current site and does not change if you select another site in the site list.
Chapter 7 Monitoring Meters Viewing Real-time Data Viewing a Data Table Changing the Data View PAS displays data in either a single record or multi-record view. To change the view, click on the Data Monitor window with the right mouse button and select either Wrap to see a single record, or UnWrap to go to the multi-record view.
Viewing Real-time Min/Max Log Chapter 7 Monitoring Meters Printing Data To check the report, as it will look when printed, select Print Preview from the File menu. button on the PAS To print retrieved data, click on the toolbar, select a printer, and then click OK. Real-time Data Logging PAS allows you to store data records to a database automatically at the time it updates data on the screen. To setup the real-time logging options: 1. Open the Data Monitor window. 2.
Chapter 7 Monitoring Meters Viewing Real-time Harmonic Spectrum Viewing Real-time Harmonic Spectrum To retrieve real-time harmonic spectrum from your meter: 1. Check the On-line button on the PAS toolbar. 2. Select the device site from the list box on the toolbar. 3. Select RT Harmonic Monitor from the Monitor menu. Use the Poll button for a single-step poll or the button for continuous polling. To stop Continuous poll continuous polling, click on the Stop button .
Chapter 8 Retrieving and Storing Files Uploading Files on Demand Chapter 8 Retrieving and Storing Files Using PAS, you can retrieve recorded events, data and waveforms from your devices and save them to files on your PC in the Microsoft Access database format. Historical data can be uploaded on demand any time you need it, or periodically through the Upload Scheduler that retrieves data automatically on a predefined schedule, for example, daily, weekly or monthly.
Chapter 8 Retrieving and Storing Files Using the Upload Scheduler 6. If you wish to retrieve data starting with a known date, check the “From” box and select the start date for retrieving data. 7. If you wish to retrieve data recorded before a known date, check the “To” box and select the last date for retrieving data. 8. Click OK. Using the Upload Scheduler To setup the Upload Scheduler: 1. Select Upload Scheduler from the Logs menu. 2.
Chapter 8 Retrieving and Storing Files Using the Upload Scheduler 3. Click Browse and select a database for storing retrieved data, or type the name for a new database, select a directory where you want to save it, and then click OK. 4. Click Configure or double click on the site row. 5. Select a daily, weekly or monthly schedule, and adjust the start time. If you wish to upload data periodically in predefined intervals, click on “Periodic” and define the time period in hours and minutes. 6.
Chapter 8 Retrieving and Storing Files Retrieving EN50160 Statistics Files Suspending the Scheduler To suspend the Upload Scheduler, check the Suspend Scheduler box at right. To activate the Upload Scheduler, leave this box unchecked. Running the Scheduler on Demand You can run the scheduler at any time outside the schedule by checking the Start Now box at right. This is a one-time action. After uploading is completed, the Upload Scheduler un-checks this box automatically.
Chapter 8 Retrieving and Storing Files Viewing Files On-line Viewing Files On-line Sometimes, it is useful to review a particular piece of historical data on-line at the time you expect new events to appear in the log. PAS allows you to retrieve historical data from a particular log without storing it to a file. The data appears only in the window on your screen. You can save it manually to the database.
Chapter 8 Retrieving and Storing Files Exporting Files 2. Select the database and a waveform or data log table you want to export, and then click Open. 3. Select a directory where you want to store your exported files, type a file name that identifies your files, select a desired file output format, and then click on the Save button. The PQDIF files are commonly recorded in compressed format. If you do not want your files to be compressed, uncheck the Compress box before saving the file.
Chapter 8 Retrieving and Storing Files Exporting Files To automatically convert your waveform or data log tables into COMTRADE or PQDIF format: 1. Open the Upload Scheduler. 2. Highlight a desired device site with the left mouse button, and then click on the Export button. 3. Check the Enabled box for a data log or a waveform log table you want to automatically convert at the upload time. 4. Highlight the Record to… row for the selected table and click on the Browse button. 5.
Chapter 8 Retrieving and Storing Files Archiving Files Each table row is provided with the device identifier that you can define in the meter database (see Creating a New Site for your Meter). Archiving Files Microsoft Access databases tend to grow fast. Databases above 0.5 Gigabytes can drastically slow down file operations. To avoid enormous growing files, you can either periodically change the target database, or use the Upload Scheduler’s file archiver to automatically move older data to archives.
Chapter 9 Viewing Files and Reports Operations with Files Chapter 9 Viewing Files and Reports Operations with Files Files you read from the meters are stored in one or in a number of tables in the meter database. Sections of multisection files like waveforms, load profiles and PQ statistics files are stored in multiple tables – each file section in a separate database table. Opening a Database Table To open a database table: on the PAS toolbar, or 1. Click on the Open button select “Open...
Chapter 9 Viewing Files and Reports Viewing Options does not support this format, you may instruct PAS to drop milliseconds. To change the way PAS records and displays the timestamp: 1. Select Options from the Tools menu and click on the Preferences tab. 2. Select the preferred timestamp format. 3. Click OK. Working with Tables Selecting Font and Grid To change the table font or a type of the grid lines: 1. Click with right mouse button on the table, select Options and click on the Table tab. 2.
Chapter 9 Viewing Files and Reports Viewing Options Working with Graphic Windows Selecting Channels To select the channels you want to view on the screen, click on the graph window with the right mouse button, select “Channels...”, check the channels you want displayed, and then click OK. Checkboxes for channels that are not available in the present view are dimmed. Selecting Primary and Secondary Units Voltages and currents can be displayed in primary or secondary units.
Chapter 9 Viewing Files and Reports Viewing Options Set Marker, and then click on the point where you want to put the marker. You can also drag both markers with the mouse, or use the right and left arrow keys on your keyboard to change the marker position. Click on the graph pane to allow the keyboard to get your input before using the keyboard.
Chapter 9 Viewing Files and Reports Viewing Options To print a graph to a printer, click on the print button the toolbar, select a printer and click OK.
Chapter 9 Viewing Files and Reports Viewing the Event Log Viewing the Event Log The Event log contains time-tagged events related to configuration changes, resets, device diagnostics, and setpoint operations. The Event log is displayed in a tabular view, one event per row. Use the scroll bar to view the entire log contents. See Working with Tables for more information on viewing options.
Chapter 9 Viewing Files and Reports Viewing the Event Log Linking to Waveforms and Data Records If a setpoint is programmed for logging setpoint operation events and it could trigger waveform or data recording, PAS automatically establishes links between the event and other database records where it finds a relationship with the event. The event ID for which PAS found related data is blue colored. Click on the colored ID to check a list of the event links.
Chapter 9 Viewing Files and Reports Viewing the Power Quality Event Log Viewing the Power Quality Event Log The EN 50160 PQ event log stores individual time-tagged power quality events. The PQ log file is displayed in a tabular view, one event per row. Use the scroll bar to view the entire log contents. See Working with Tables for more information on viewing options.
Chapter 9 Viewing Files and Reports Viewing the Power Quality Event Log Linking to Waveforms and Data Records PQ events for which PAS found related links are blue colored. Click on the colored ID to check a list of the event links. Click on a list item to move to the related waveform or data log records. Data records associated with the event are taken into a separate window for easy viewing and trending.
Chapter 9 Viewing Files and Reports Viewing the Power Quality Event Log See Using a Zoom and Changing Region Size for information on how to change the graph scale to separate closely located elements.
Chapter 9 Viewing Files and Reports Viewing the Fault Log Viewing the Fault Log The Fault recorder stores time-tagged fault events. Fault log files are displayed in a tabular view. Use the scroll bar to see the entire log contents. See Working with Tables for more information on viewing options. Filtering and Sorting Events To filter events, click on the Filter button , or click on the report window with the right mouse button and select “Filter...
Chapter 9 Viewing Files and Reports Viewing the Fault Log Linking to Waveforms and Data Records When displaying the fault report, PAS establishes links between the event and related waveforms and data log records. Fault events for which PAS finds related links are blue colored. Click on the colored event ID with the left mouse button to check a list of the event links. Click on a list item to move to the related waveform or data log records.
Chapter 9 Viewing Files and Reports Viewing the Data Log Viewing the Data Log Data log files can be displayed in a tabular view, one data record per row, or in a graphical view as a data trend graph. Viewing Data Trend To view data in a graphical form, click on the Data Trend button on the local toolbar. To change the time range for your graph, click on the Time on the local toolbar, and then select the Range button desired date and time range.
Chapter 9 Viewing Files and Reports Viewing Waveforms Viewing Waveforms Waveforms can be displayed in five different views: as overlapped waveforms on a common time axis, individual waveforms using separate time axes, as a cycle-by-cycle plot of RMS values, as a frequency chart for voltage channels, and as a harmonic spectrum in a graph or in a table view. Each waveform window has a local toolbar from where you can open another window to examine the waveforms in a different view.
Chapter 9 Viewing Files and Reports Viewing Waveforms A waveform window displays up to 128 waveform cycles. If the waveform contains more cycles, the scroll bar appears under the waveform pane allowing you to scroll through the entire waveform. Scrolling through the Database The status bar at the bottom shows you how many records the database contains. Use green arrowheads to scroll through records.
Chapter 9 Viewing Files and Reports Viewing Waveforms Viewing a Frequency Plot Click on the button to view a cycle-by-cycle frequency plot for the sampled voltage waveforms. Viewing a Spectrum Chart button to view a spectrum chart for the Click on the selected waveform channel. PAS provides voltage, current, active power and reactive power spectrum charts. To change a channel, click on the window with the right mouse button, select “Channels...”, check the channel you want displayed, and then click OK.
Chapter 9 Viewing Files and Reports 166 Viewing Waveforms EM720 Power Quality and Revenue Meter
Chapter 9 Viewing Files and Reports Viewing Waveforms To review or change harmonic limits: 1. Click on the spectrum window with the right mouse button and select “Limits…”. 2. Select a harmonics standard, or select “Custom” and specify your own harmonic limits. 3. Check the Enabled box to visualize harmonic faults on the spectrum graph and in harmonic tables. Harmonics that exceed selected compliance levels are colored in red on the graph and in the tables.
Chapter 9 Viewing Files and Reports Viewing Waveforms Waveform Viewing Options See Working with Graphic Windows for more information on working with waveforms. Viewing Phasor Diagrams The phasor diagrams show you relative magnitudes and angles of the three-phase voltage and current fundamental component. All angles are shown relative to the reference voltage channel. To change the reference channel, click on the waveform window with the right mouse button, select “Options...
Chapter 9 Viewing Files and Reports Viewing Waveforms currents, calculated for the point indicated by the left marker line. To enable or disable the symmetrical components, click on the waveform window with the right mouse button, select “Options...”, check or uncheck the “Symmetrical components” box on the “Channels” tab, and then click OK. Viewing Synchronized Waveforms If you have a number of devices with synchronized clocks, you can view waveforms recorded at different locations in one window.
Chapter 9 Viewing Files and Reports Viewing Waveforms 4. Click on the “Channels” button and select channels for each site. 5. Click OK. To change the channels, click on the waveform window with the right mouse button and select “Channels...”.
Chapter 9 Viewing Files and Reports Viewing EN50160 Statistics Reports Viewing EN50160 Statistics Reports Viewing the EN50160 Compliance Report To get the EN50160 Compliance report, select “EN50160 Compliance Statistics” from the Reports menu, point to the database where you stored the retrieved statistics data, uncheck the voltage characteristics’ tables you do not want to be reported, and then click Open. An example of the EN50160 compliance report is shown in the following picture.
Chapter 9 Viewing Files and Reports Viewing EN50160 Statistics Reports Selecting the Time Range To change the time range or contents of the report, click on the report with the right mouse button, select “Options…”, select the required time range, check the voltage characteristics to be included in the report, and then click OK.
Chapter 9 Viewing Files and Reports Viewing EN50160 Statistics Reports Customizing Reports If you wish to add a logo image, header and footer to your reports: 1. Select “Report Setup…” from the Reports menu, or click on the report window with the right mouse button, and then select “Report Setup…”. 2. Click on the Change button and select a logo image file. Check the “Show” box to include your logo into a report. 3. Type the header text in the Page Header box.
Chapter 9 Viewing Files and Reports Viewing EN50160 Statistics Reports 5. Click OK. Both the header and the footer may contain more than one line of the text. Use the Enter button to move to the next line as usually. Viewing the EN50160 Online Statistics Report If you retrieved the EN50160 online statistics data, you can view the online report on the last retrieved statistics in the same manner as the EN50160 Compliance statistics report.
Appendix A Parameters for Monitoring and Logging Appendix A Logging Parameters for Monitoring and The following table lists all electricity and status parameters available for monitoring via communication ports, for data logging, and for triggering setpoints.
Appendix A Parameters for Monitoring and Logging Designation 176 Description MINUTES Minutes SECONDS Seconds MINUTE INTERVAL Minute interval: 1-5, 10, 15, 20, 30, 60 min SYMM COMP Symmetrical Components V PSEQ Positive-sequence voltage V NSEQ Negative-sequence voltage V ZSEQ Zero-sequence voltage V NSEQ UNB% Negative-sequence voltage unbalance V ZSEQ UNB% Zero-sequence voltage unbalance I PSEQ Positive-sequence current I NSEQ Negative-sequence current I ZSEQ Zero-sequence current
Appendix A Parameters for Monitoring and Logging Designation Description 8 PF L3 Power factor L3 V1 THD V1/V12 voltage THD 2,3 V2 THD V2/V23 voltage THD 2,3 V3 THD V3/V31 voltage THD 2,3 I1 THD I1 current THD 3 I2 THD I2 current THD 3 I3 THD I3 current THD 3 I1 KF I1 K-Factor 3 I2 KF I2 K-Factor 3 I3 KF I3 K-Factor 3 I1 TDD I1 current TDD 3 I2 TDD I2 current TDD 3 I3 TDD I3 current TDD 3 V12 V12 voltage V23 V23 voltage V31 V31 voltage RT LOW 1-Cycle Low Values
Appendix A Parameters for Monitoring and Logging Designation 178 Description 8 PF LEAD Total PF lead kW IMP Total kW import 8 kW EXP Total kW export 8 kvar IMP Total kvar import 8 kvar EXP Total kvar export 8 V AVG 3-phase average line-to-neutral/line-to-line voltage V LL AVG 3-phase average line-to-line voltage I AVG 3-phase average current RT AUX 1-Cycle Auxiliary Values I4 I4 current In In current FREQ Frequency V UNB% Voltage unbalance 6 I UNB% Current unbalance 6 AV
Appendix A Parameters for Monitoring and Logging Designation Description V2x V2x phase-to-ground voltage V3x V3x phase-to-ground voltage AVR LOW 1-Second Low Values on any Phase V LOW Low line-to-neutral/line-to-line voltage I LOW Low current kW LOW Low kW kvar LOW Low kvar kVA LOW Low kVA PF LAG LOW Low lagging PF PF LEAD LOW Low leading PF THD LOW Low voltage THD 2,43 V THD LOW Low current THD 4 1 4 KF LOW Low K-Factor I TDD LOW Low current TDD V L-L LOW Low line-to-line
Appendix A Parameters for Monitoring and Logging Designation 180 Description V UNB% Voltage unbalance 6 I UNB% Current unbalance 6 VDC Auxiliary battery voltage V4x V4x neutral-ground voltage Temp Internal temperature RMS (0.2 sec) 0.
Appendix A Parameters for Monitoring and Logging Designation Description I1 I1 current I2 I2 current I3 I3 current I4 I4 current In In current V ZERO-SEQ Zero-sequence voltage I ZERO-SEQ Zero-sequence current V UNB% Negative-sequence voltage unbalance I UNB% Negative-sequence current unbalance FREQ Frequency V PSEQ Positive-sequence voltage V ZSEQ UNB% Zero-sequence voltage unbalance HRM TOT (0.2 sec) 0.
Appendix A Parameters for Monitoring and Logging Designation 182 Description I1 TDD I1 TDD I2 TDD I2 TDD I3 TDD I3 TDD I4 TDD I4 TDD I1 KF I1 K-Factor I2 KF I2 K-Factor I3 KF I3 K-Factor I4 KF I4 K-Factor HRM TOT (10 min) 10-Minute Total Harmonics V1 THD V1/V12 THD 2 V2 THD V2/V23 THD 2 V3 THD V3/V31 THD 2 I1 THD I1 THD I2 THD I2 THD I3 THD I3 THD I4 THD I4 THD V1 THD/I V1/V12 interharmonics THD 2 V2 THD/I V2/V23 interharmonics THD 2 V3 THD/I V3/V31 interharmonic
Appendix A Parameters for Monitoring and Logging Designation Description I1 DMD I1 Ampere demand I2 DMD I2 Ampere demand I3 DMD I3 Ampere demand kW IMP BD kW import block demand kvar IMP BD kvar import block demand kVA BD kVA block demand kW IMP SD kW import sliding window demand kvar IMP SD kvar import sliding window demand kVA SD kVA sliding window demand kW IMP ACD kW import accumulated demand kvar IMP ACD kvar import accumulated demand kVA ACD kVA accumulated demand kW IMP PRD
Appendix A Parameters for Monitoring and Logging Designation 184 Description REG10 SD Register #10 sliding demand ENERGY Instrumentation Total Energy kWh IMPORT kWh import kWh EXPORT kWh export kWh NET kWh net kvarh IMPORT kvarh import kvarh EXPORT kvarh export kvarh NET kvarh net kvarh Q1 kvarh quadrant Q1 kvarh Q2 kvarh quadrant Q2 kvarh Q3 kvarh quadrant Q3 kvarh Q4 kvarh quadrant Q4 kVAh TOTAL kVAh total kVAh IMPORT kVAh import (Q1+Q4) kVAh EXPORT kVAh export (Q2+Q3) SUM
Appendix A Parameters for Monitoring and Logging Designation Description %HD I4 I4 Harmonic Distortions I3 %HD01 H01 Harmonic distortion 3 I3 %HD02 H02 Harmonic distortion … ... I3 %HD50 H50 Harmonic distortion ANG V1 V1/V12 Harmonic Angles V1 H01 ANG H01 Harmonic angle V1 H02 ANG H02 Harmonic angle … ... V1 H50 ANG H50 Harmonic angle ANG V2 V2/V23 Harmonic Angles V2 H01 ANG H01 Harmonic angle V2 H02 ANG H02 Harmonic angle … ...
Appendix A Parameters for Monitoring and Logging Designation 186 Description kvar L1 H01 kvar L1 8 kvar L2 H01 kvar L2 8 kvar L3 H01 kvar L3 8 kVA L1 H01 kVA L1 8 kVA L2 H01 kVA L2 8 kVA L3 H01 kVA L3 8 PF L1 H01 Power factor L1 8 PF L2 H01 Power factor L2 8 PF L3 H01 Power factor L3 8 HRM TOT POW Fundamental Total Power Values kW H01 Total fundamental kW kvar H01 Total fundamental kvar kVA H01 Total fundamental kVA 8 8 8 8 PF H01 Total fundamental PF FLICKER Flick
Appendix A Parameters for Monitoring and Logging Designation Description I3 KF MIN I3 K-Factor I1 TDD MIN I1 current TDD I2 TDD MIN I2 current TDD I3 TDD MIN I3 current TDD V12 MIN V12 voltage V23 MIN V23 voltage V31 MIN V31 voltage MIN TOTAL Minimum 1-Cycle Total Values kW MIN Total kW kvar MIN Total kvar 8 8 8 kVA MIN Total kVA PF MIN Total PF PF LAG MIN Total PF lag PF LEAD MIN Total PF lead MIN AUX Minimum 1-Cycle Auxiliary Values I4 MIN I4 current In MIN In current
Appendix A Parameters for Monitoring and Logging Designation 188 Description I2 TDD MAX I2 current TDD I3 TDD MAX I3 current TDD V12 MAX V12 voltage V23 MAX V23 voltage V31 MAX V31 voltage MAX TOTAL Maximum 1-Cycle Total Values kW MAX Total kW kvar MAX Total kvar kVA MAX Total kVA 8 8 8 8 PF MAX Total PF PF LAG MAX Total PF lag PF LEAD MAX Total PF lead 8 8 MAX AUX Maximum 1-Cycle Auxiliary Values I4 MAX I4 current In MAX In current FREQ MAX Frequency V UNB% MAX Voltag
Appendix A Parameters for Monitoring and Logging Designation Description … … REG10 CMD Summary register #10 cumulative maximum demand TOU PRMS TOU Parameters ACTIVE TARIFF Active TOU tariff ACTIVE PROFILE Active TOU profile TOU REG1 Billing TOU Energy Register #1 REG1 TRF1 Tariff #1 register REG1 TRF2 Tariff #2 register … … REG1 TRF8 Tariff #8 register TOU REG2 Billing TOU Energy Register #2 REG2 TRF1 Tariff #1 register REG2 TRF2 Tariff #2 register … … REG2 TRF8 Tariff #8 regi
Appendix A Parameters for Monitoring and Logging Designation 190 Description TOU REG10 Billing TOU Energy Register #10 REG10 TRF1 Tariff #1 register REG10 TRF2 Tariff #2 register … … REG10 TRF8 Tariff #8 register TOU MAX DMD REG1 Billing TOU Maximum Demand Register #1 REG1 TRF1 MD Tariff #1 maximum demand REG1 TRF2 MD Tariff #2 maximum demand … … REG1 TRF8 MD Tariff #8 maximum demand REG1 TRF1 CMD Tariff #1 cumulative maximum demand REG1 TRF2 CMD Tariff #2 cumulative maximum demand
Appendix A Parameters for Monitoring and Logging Designation Description TOU MAX DMD REG6 Billing TOU Maximum Demand Register #6 REG6 TRF1 MD Tariff #1 maximum demand REG6 TRF2 MD Tariff #2 maximum demand … … REG6 TRF8 MD Tariff #8 maximum demand REG6 TRF1 CMD Tariff #1 cumulative maximum demand REG6 TRF2 CMD Tariff #2 cumulative maximum demand … … REG6 TRF8 CMD Tariff #8 cumulative maximum demand TOU MAX DMD REG7 Billing TOU Maximum Demand Register #7 REG7 TRF1 MD Tariff #1 maximum d
Appendix A Parameters for Monitoring and Logging Designation Description V2 Chg% V2 Voltage change, %Un (last 1-hour value) V2 Chg Freq Repetition rate of V2 voltage changes, 1/min V3 Chg% V3 Voltage change, %Un (last 1-hour value) V3 Chg Freq Repetition rate of V3 voltage changes, 1/min V1 Pst V1 Voltage Pst V2 Pst V2 Voltage Pst V3 Pst V3 Voltage Pst V1 Plt V1 Voltage Plt V2 Plt V2 Voltage Plt V3 Plt V3 Voltage Plt V1 THD V1 Voltage THD, % V2 THD V2 Voltage THD, % V3 THD V3 Volt
Appendix A Parameters for Monitoring and Logging Short Data Name REG1 BD Long Data Name SUM REG1 BLK DMD Description Billing summary (total) register block demand REG1 SD SUM REG1 SW DMD Billing summary (total) register sliding demand REG1 SUM REG1 Billing summary (total) energy register REG1 MD SUM REG1 DMD MAX Billing summary (total) register maximum demand REG1 TRF1 TOU REG1 TRF1 Billing tariff energy register REG1 TRF1 MD DMD1 TRF1 MAX Billing tariff register maximum demand TRF1 SEASO
Appendix B Setpoint Parameters Appendix B Setpoint Parameters Setpoint Triggers For setpoint triggers, see Monitoring and Logging. Appendix A Parameters for Setpoint Actions The available setpoint actions are listed in the following table.
Appendix C Billing and Load Profile Log Files Appendix C Billing and Load Profile Log Files The following tables show the record structure for the monthly and daily billing data profile and energy load profile log files. The second column shows data abbreviations used in the PAS data log reports. Data log file sections are highlighted in bold. Energy Load Profile Data Log (Data Log #12) Field No.
Appendix C Billing and Load Profile Log Files Field No. 2 Designation TIME0 Description Summary (total) max. demand timestamp 3 REG1 CMD Summary (total) cumulative max. demand 4 TRF1 MD Tariff #1 max. demand 5 TIME1 Tariff #1 max. demand timestamp 6 TRF1 CMD Tariff #1 cumulative max. demand 7 TRF2 MD Tariff #2 max. demand 8 TIME2 Tariff #2 max. demand timestamp 9 TRF2 CMD Tariff #2 cumulative max. demand 10 TRF3 MD Tariff #3 max. demand 11 TIME3 Tariff #3 max.
Appendix C Billing and Load Profile Log Files Field No. 24 Designation TRF7 CMD Description Tariff #7 cumulative max. demand 25 TRF8 MD Tariff #8 max. demand 26 TIME8 Tariff #8 max. demand timestamp 27 TRF8 CMD Tariff #8 cumulative max. demand The number of parameters in each section is automatically configured depending on the number of actual tariffs you defined in the TOU Daily Profiles Daily Billing Profile Data Log (Data Log #16) Field No.
Appendix C Billing and Load Profile Log Files Field No. Designation Description 8 TRF7 MD Tariff #7 max. demand reading 9 TRF8 MD Tariff #8 max. demand reading The number of parameters in each section is automatically configured depending on the number of actual tariffs you defined in the TOU Daily Profiles.
Appendix D EN50160 Statistics Log Files Appendix D EN50160 Statistics Log Files The following tables list the EN50160 evaluation parameters recorded by the device to the EN50160 statistics data log files. The second column shows data abbreviations used in the PAS data log reports. Data log file sections are highlighted in bold. EN50160 Compliance Statistics Log (Data Log #9) Field No.
Appendix D EN50160 Statistics Log Files Field No.
Appendix D EN50160 Statistics Log Files Field No.
Appendix D EN50160 Statistics Log Files Field No.
Appendix D EN50160 Statistics Log Files Field No.
Appendix D EN50160 Statistics Log Files Field No.
Appendix E EN50160 Evaluation and Recording Appendix E EN50160 Evaluation and Recording EN50160 Background The EN50160 European standard “Voltage characteristics of electricity supplied by public distribution systems” issued by CENELEC defines the main physical characteristics of electric energy supplied by low and medium voltage public distribution systems under normal operating conditions. The voltage characteristics are evaluated using a statistical approach.
Appendix E EN50160 Evaluation and Recording values, which are intended to provide users with information on the order of magnitude which can be expected. The following table gives the characteristics for which indicative values have been specified by the standard. Voltage Characteristic Indicative values Observation period Voltage dips Less than 1 s, 60% depth Year Short interruptions 70% less than 1 s Year Long interruptions 10 to 50% less than 3 min Year Temporary overvoltages Less than 1.
Appendix E EN50160 Evaluation and Recording clears the evaluation registers and counters so that each evaluation period’s statistics is stored in a separate record. You can upload and view the online statistics data via PAS reports, using data collected since the beginning of the present evaluation interval. You can also manually clear the present contents of the counters though PAS before starting your EN50160 evaluation.
Appendix E EN50160 Evaluation and Recording Supply Voltage Variations This characteristic defines slow variations of steady state supply voltage magnitude. Method of Evaluation The basic supply voltage magnitude measurement is the RMS value of the steady state voltage over a period of 10 minutes under normal operating conditions. A voltage variation is not evaluated if the supply voltage crosses a voltage tolerance limit (±15% Un).
Appendix E EN50160 Evaluation and Recording the supply voltage. Flicker is indicated by the long-term flicker severity parameter Plt, which is evaluated every 2 hours. Method of Evaluation The basic measurement is the short-term flicker severity indicator Pst, evaluated each 10 minutes by instrumentation complying with IEC 61000-4-15. The indicative long-term flicker severity Plt is evaluated from 12 consecutive Pst values.
Appendix E EN50160 Evaluation and Recording Indicative Values Under normal operating conditions the expected number of voltage dips in a year may be from up to a few tens to up to one thousand. The majority of voltage dips have a duration less than 1 s and a depth less than 60%. Voltage Interruptions Voltage interruptions correspond to temporary loss of supply voltage on all phases lasting less than or equal to 3 minutes in the event of short interruptions, and more than 3 minutes for long interruptions.
Appendix E EN50160 Evaluation and Recording The overvoltage threshold can be changed in the meter via the EN50160 PQ Recorder setup. The basic voltage measurement is one-cycle RMS voltage updated each half-cycle. Statistical Survey The EM720 provides the statistical evaluation of temporary overvoltages using the classification recommended by Eurelectric’s Measurement guide for voltage characteristics. Temporary overvoltages are classified by voltage magnitude and duration as shown in Appendix D.
Appendix E EN50160 Evaluation and Recording component expressed in percent of the positive sequence component. Voltage unbalance is not evaluated if the supply voltage crosses a voltage tolerance limit (±15% Un). Target Values The range of voltage unbalance given in the EN50160 is: ≤ 2% (≤ 3% in some areas) for 95% of a week The voltage unbalance compliance limit can be changed in the meter via the EN50160 PQ Recorder setup.
Appendix E EN50160 Evaluation and Recording distortion factor (THD) over a period of 10 minutes under normal operating conditions. Interharmonic voltages are evaluated by instrumentation complying with IEC 61000-4-7. All calculations are made relative to the nominal voltage. The highest harmonic order for evaluating individual interharmonic voltages and interharmonic THD can be selected in the meter in the range of 25 to 50 via the EN50160 Advanced setup.
Appendix E EN50160 Evaluation and Recording Signaling voltages are not evaluated if the supply voltage crosses a voltage tolerance limit (±15% Un). Target Values The voltage levels given by the EN50160 in Figure 1 of Clause 2.13 are taken from the so-called “Meister-curve” which defines the maximum permissible ripple control voltages in LV networks. Compliance with the EN50160 requires that the 3-second mean of signal voltages shall be less or equal to the specified limits for 99% of a day.
Appendix F Data Scales Appendix F Data Scales The maximum values for volts, amps and powers in EM720 setup and in communications are limited by voltage and current scale settings. See Device Options Mode Control in Chapter 5 on how to change the voltage current scales in your meter. the the and and The following table shows the meter data scales.
Appendix G Device Diagnostic Codes Appendix G Diagnostic Code Device Diagnostic Codes Display Message Description Reason 2 RAM/Data fault RAM/Data error Hardware failure 3 Watchdog reset Hardware watchdog reset Hardware failure 4 Sampling fault DSP/Sampling fault Hardware failure 5 CPU exception CPU exception Hardware failure 6 Run-time error Run-time error Hardware failure 7 SW watchdog reset Software watchdog timeout Hardware failure 8 Power down Power down Loss of power
Appendix H OBIS Identification Codes Appendix H OBIS Identification Codes The OBIS (Object Identification System IEC 62056-61) codes are used to identify energy and maximum demand readings in the IEC 62056-21 protocol (see the EM720 IEC 62056-21 Reference Guide) and in the billing data displays on the EM720 front display. The OBIS code structure used in the EM720 is as follows: B : C.D.E * F where B – energy metering channel 1-6.
Appendix H OBIS Identification Codes OBIS Code Unit kW/MW kW import maximum demand, total 1.6.1-1.6.8 kW/MW kW import maximum demand, tariff 1-8 2.6.0 kW/MW kW export maximum demand, total 2.6.1-2.6.8 kW/MW kW export maximum demand, tariff 1-8 3.6.0 kvar/Mvar kvar import maximum demand, total 3.6.1-3.6.8 kvar/Mvar kvar import maximum demand, tariff 1-8 4.6.0 kvar/Mvar kvar export maximum demand, total 4.6.1-4.6.8 kvar/Mvar kvar export maximum demand, tariff 1-8 5.6.
