USER’S MANUAL 160KSS360400/50400 2nd Edition Frequency Converter Visicomm Industries LLC 911A Milwaukee Ave.
CONTENTS USER’S MANUAL .................................................................................................... 1 1. SYSTEM OVERVIEW........................................................................................ 3 1.1. CONSTRUCTION OF THE UNIT................................................................ 3 1.2. FEATURES AND ADVANTAGES.............................................................. 3 1.3. FRONT PANEL........................................................................
1. SYSTEM OVERVIEW 1.1. CONSTRUCTION OF THE UNIT WARNING! Be sure to operate the converter within its rated capacity. Prevent direct exposure to sunlight, rain, or any other contaminating environment. The System is composed of an input breaker, input filter & protection network, rectifier, inverter, isolation transformer and output filter. The basic topology is shown in the diagram above.
e. High frequency design: The inverter uses high frequency, high efficiency IGBTs, and PWM to convert the DC power to AC power. The number of components is reduced, resulting in increased reliability, smaller size and weight, less transportation cost, improved performance, and the elimination of acoustic noise. f. True Galvanic isolation: An isolation transformer is used at the output. This solves the problem of poor input grounding and will accept a different ground between input and output.
1.3. FRONT PANEL The front panel gathers the real time information of the UNIT and displays the data clearly. It also provides switches for controlling and setting the UNIT. Each part of the panel is explained below: A. LCD display- Real time status, data, and historical events are displayed on the LCD. The UNIT parameters, real time clock, inverter, buzzer also can be set through this LCD.
D. Buzzer outlet: The buzzer is located inside the UNIT. When abnormal conditions occur, a clearly audible sound will be issued to warn the user to check the UNIT. The buzzer will beep under any the following conditions: 1. INVERTER IS OVERLOADED > 110% -- beeps once every 3 seconds > 125% -- beeps once every second > 150% -- beeps twice every second 2. INVERTER IS SHORT CIRCUITED -- beep continuously 3. FUSE BLOWN -- beep continuously 4. HEAT SINK OVER TEMPERATURE -- beep continuously 5.
2. INSTALLATION 2.1. SITE & ENVIRONMENT CONSIDERATIONS The primary function of the UNIT is to provide a safe, clean independent electrical supply to the load which is : A) Perfectly regulated in both voltage and frequency B) Free from any random variations, disturbances or interruptions. The following precautions and recommendations should be checked in considering the site and environment of the UNIT: a.
i. The walls, ceiling, floor, or anything near the UNIT should be constructed of non-combustible materials. j. A portable fire extinguisher should be accessible. k. Avoid accumulating litter or trash of any sort in or around the UNIT. The floor area surrounding the UNIT should be kept clean so that metallic filings and powder are not sucked into the unit causing a short circuit and possible damage to the system. l.
2.2. CABLE SELECTION The unit should be installed by an electrician qualified to interpret and implement the national and local electrical codes. The following table lists the operating voltage and the maximum input current for all the KVA ratings of the converters. The right two columns list the standard output voltages and their respective maximum output currents for all the different models.
2.3. TABLE OF MAXIMUM CURRENTS FOR BOTH THE INPUT AND OUTPUT KVA RATING 10 20 30 40 50 60 80 100 120 160 200 300 400 I/P VOLTAGE 120/208 220/380 277/480 120/208 220/380 277/480 120/208 220/380 277/480 120/208 220/380 277/480 120/208 220/380 277/480 120/208 220/380 277/480 120/208 220/380 277/480 120/208 220/380 277/480 120/208 220/380 277/480 120/208 220/380 277/480 120/208 220/380 277/480 120/208 220/380 277/480 120/208 220/380 277/480 I/P CURRENT O/P VOLTAGE O/P CURRENT 38.5 21 16.
3. OPERATIONS After all cables have been connected, the converter is ready to operate once the power source is available at the input terminal. Before you turn on any switch or breaker, check the following points listed below: a. b. c. d. e. See if the input voltage is within tolerance for the converter’s rated input voltage. See it the input frequency conforms to the converter’s rated input frequency. Check if all loads at the output are switched off. All breakers are opened – turned off.
3.2. SHUTDOWN PROCEDURE If you want to shutdown the converter completely (no power at the output or inside), please follow the steps below. a. Open the Output breaker. WARNING – If there is no load or the load has been disconnected externally prior to opening the Output breaker, the output terminals will maintain a DC voltage due to filter capacitors on the output terminals. Before contacting these terminals they should be discharged.
4. LCD DISPLAY The LCD screen can display much more information than LED’s. In order to make the display sharp and readable, the LCD is back-lit. To prolong the life time of the back-lighting, the CPU will turn off the back light after 3 minutes if no keys are pressed. Of course, the back light will stay lit if the UP, DOWN or ENTER keys are pressed. The first page of the LCD is the MAIN MENU, which is the first screen that is displayed once the system power is enabled (i.e. this is the default screen). 4.
that could be present. See MENU 9 – STATUS/WARN/FAULT below. The HISTORICAL DATA display will list any system faults such as input power failure or other problems within the UNIT. See MENU 10 – HISTORICAL DATA below. 4.3. MENU 2 – PARAMETER SET INVERTER = ON BUZZER = ON BOOST CHARGE ? DATE / TIME EXIT This menu is selected from MENU 1, the SELECT MENU. to enter this menu.
4.4. MENU 3 – DATE / TIME YEAR = 2003 HOUR(24H) = 14 MONTH = 09 MINUTE = 45 DAY = 25 DAY OF THE WEEK = THU EXIT This menu is selected from MENU 2, the PARAMETER SETTING menu. The user can change the YEAR/MONTH/DAY/HOUR/MINUTE/DAY OF THE WEEK of the real time clock through this menu. When this menu is selected, the current value in the real time clock will be displayed.
4.6. MENU 5 – RECTIFIER DATA RECTIFIER FREQUENCY = 60 HZ A–B = 238 Vac B–C = 238 Vac C–A = 240 Vac This menu is selected from MENU 4, the REAL TIME DATA menu. This menu will display the AC power input frequency and the input voltage. illustrated this is the phase to phase voltage of each phase. The UP(?) or DOWN(?) keys have no function in this menu. REAL TIME DATA menu when ENTER(<+ ) is pressed. 4.7.
4.9. MENU 8 – OTHER DATA TEMPERATURE = 26°c This menu is selected from MENU 4, the REAL TIME DATA menu. This menu will display the temperature in degrees centigrade of the internal heat sink for the IGBT’s (switching regulators). The UP(?) or DOWN(?) keys have no function in this menu. REAL TIME DATA menu when ENTER(<+ ) is pressed. 4.10.
4.11. MENU 10 – HISTORICAL DATA 2003/09/10 14:14 RUN:00YR00MO FUSE/OVERHEAT This menu is selected from MENU 1, the SELECT MENU. The records are stored in EEPROM when abnormal events occur and are displayed in this menu. The record display begins with the date and time stamp of each abnormal event. The user or maintenance personnel can trace back these events up to 77 records (which can be increased to 154 records with 2 EEPROMs).
5. REDUNDANCY ( SYSTEM BACK – UP ) Redundancy can be roughly divided in two types: serial (hot standby) redundancy and parallel (active) redundancy. A serially redundant system consists of two converters, with the output of the second converter connected to the reserve input of the first converter. The load is connected to the output of the first converter. Both converters are normally running. The load is being supplied entirely by the first converter and is protected by the first converter.
6. HELP Some practical situations are discussed in this section. Q: A: AC input is normal, but the rectifier does not operate? Check if the rectifier breaker has been closed. Solution: Close the rectifier breaker. Check if the phase sequence of the AC input is correct. The LCD will display error message ‘RECT PHASE ERROR’ in the STATUS/WARN menu. The ROTATION ERROR led on left hand side of the front panel will light as well. Solution: Correct the input connection.
