SERIES 4000 ENERGY METER WATT WATCHER INSTALLATION AND OPERATION MANUAL HOYT ELECTRICAL INST. WORKS INC. PENACOOK, NEW HAMPSHIRE PHONE 800-258-3652 www.hoytmeter.
INDEX Short Cut to Resetting the Demand Readings . Inside Front Cover Introduction 1. Main Features 2. The Meter Terminal Description 3. Wiring Diagrams 4. Wiring Instructions 5. Solid Core Current Transformers 5. Split Core Model “TP” Current Transformers 6. Split Core Model “1250” Current Sensors 7. Common Terms Used in Metering 8. Specifications 9. Communications 10. ModBus Protocol 11. Trouble Shooting 12.
INTRODUCTION: You now have in your possession one of the most reliable and highly accurate meters ever manufactured. To insure proper installation and performance please take the time to read this manual before installing this meter. The installation information contained within this manual is to be used as a guide and any applicable electrical codes must take precedence over the information contained within.
MAIN FEATURES: The Series 4000 is factory programmed offering one model for both 3 or 4 wire services or branch circuits. The factory has program the Amperage, and a 15-min. demand period (KW4000 only), according to the distributors purchase order. There are six (6) kWh digits across the top section of the display, which are the kilowatt-hours accumulated. There are no resets available for kWhs, like a utility meter and there are no multipliers needed to read the energy consumed.
THE SERIES 4000 CONNECTION TERMINALS Terminal No.
CONNECTION DIAGRAMS FOR THE SERIES 4000 Three Phase 4 wire service, which also includes a Hi-leg Service. 1. Use either 5 Amp in-line fuses or a 15 Amp CB with lock 2. RS485 Terminals (+ GRN - ) optional 3. Relay 1 pulse relay B. Three Phase 3 wire: (either a delta or 3 wires of a 4 wire service) 1. 2. 3 5 Amp in-line fuses or 15 Amp CB with lock RS485 Terminals (+ GRN - ) optional Relay 1 pulse relay 4.
WIRING INSTRUCTIONS 1. All wiring to this meter must comply with National Electric Code or any local codes that are applicable. A grounding conductor must be installed and connected to the ground lug located under the terminal cover in the meter. 2. The voltage wires connected to the line terminals in the meter can be No. 14 gage. The load for the meter is .03 Amps. Either 5 Amp in-line fuses or a 15 Amp circuit breaker with a locking handle should protect the voltage leads. 3.
Split Core Current Transformers (Model NMI-TP-Series) Please refer to the above drawing: 1. Remove and dispose of the packaging materials 2. To remove the end piece, unscrew the assembly nuts, push in on the end piece to relieve the pressure on the bolts. Pull the bolts out and pull the end from the main U shaped housing. 3. Position the “P1” side of the CT towards the line side of the service. 4. There are 2 screw pressure terminals labeled “S1” and “S2”.
Split Core Current Sensor Model (NMI 1250-400) The secondary side of these split core transformers is 110 milli-volts at 400 Amps. You need to cap the black and white wires separately if the meter is not installed at the time the current sensor is working. Pull hard on the bottom section to open the yoke of the sensor. Install around conductor and snap back together. Twist the black and white wires independently from each sensor. The sensor wires and the voltage wires can be installed in the same conduit.
COMMON TERM USED WITH METER READINGS VOLTAGE: The potential between phase and neutral or phase to phase. This can be 120 to 480 volts depending upon the model selected. AMPERE: A unit of electrical current, which will flow through a resistance of 1 ohm by 1 volt. WATTS: A unit of active power, which is defined as the rate at which energy is delivered to a circuit. This is the power expanded when a current of one Ampere flows through a resistance of one ohm. kW: A common abbreviation for 1000 watts.
SPECIFICATIONS: Power Supply: Single Phase 230 or 480 VAC in applicable models Voltage Tolerance –20% to +20% Frequency 50 to 60 Hz. Power 6 VA Operating Temperature -10 to 50 degrees C Measuring Circuits: Rated Voltage 300 V. phase to neutral and 500 V. phase to phase Rated Current ..5 Amp secondary and (110 mv.) option Permanent Overload 1.25 % Current Input Burden 0.75 VA Accuracy: Voltage .05 Current .05 Energy .05 Power Factor 0.
COMMUNICATION NETWORK One or more meter can be connected to a PC so you can read all the parameters at one central location. There is a terminal block marked RS485 (+ GR -) which is the connections for the 3 wire #16 shielded cable. You can connect more than one meter to a circuit, but you must assign a different identification number to each meter This can be expanded by the use of hexadecimal coding. 10.
MODBUS PROTOCOL The Series 4000 Energy Meter can communicate by means of the ModBus protocol as described below: When the meter communicates with MoBus, it uses the RTU mode (Remote Terminal Unit). Each 8-bits byte in a message contains two 4-bits hexadecimal characters.
ENGINEERING SPECIFICATIONS FOR K4000 SERIES THREE PHASE KILOWATT HOUR METER 1.1 GENERAL Submeter for three phase energy billing of kilowatt hours 1. Meter Technology: a. The meter shall calculate the electrical usage of individual or multiple tenant loads with the use of remote current transformers. The meter shall use microprocessor-based technology. The meter shall be capable of sampling each power waveform calculating power factor and harmonic content, to achieve accurate readings.
Page 2 Three-Phase meter specifications cont. 4. Accuracy and Listings: a. b. c. d. e. The meter shall comply with ANSI C12.16 Electricity Metering Standards FCC Class A. Part 15 Emission UR – UL component Listed The CTs shall comply to ANSI C57.13 to .6KV UL / CUL Listed 5. Communications: a. The meter shall have an RS 485 communication port. The protocol shall be ModBus RS485 RTU.
