CHAPTER 1: OVERVIEW SPECIFICATIONS
PQM POWER QUALITY METER – INSTRUCTION MANUAL 1–17
PULSE INPUT
MAX INPUTS: 4
MIN PULSE WIDTH: 150 ms
MIN OFF TIME: 200 ms
COMMUNICATIONS
COM1/COM2 TYPE: RS485 2-wire, half duplex, isolated
COM3 TYPE: RS232 9-pin
BAUD RATE: 1200 to 19200
PROTOCOLS: Modbus
®
RTU; DNP 3.0
FUNCTIONS: Read/write setpoints
Read actual values
Execute commands
Read Device Status
Loopback Test
CLOCK
ACCURACY: ±1 minute / 30 days at 25°C ± 5°C
RESOLUTION: 1 sec.
CONTROL POWER
INPUT: 90 to 300 V DC or
70 to 265 V AC, 50/60 Hz
POWER: nominal 10 VA
maximum 20 VA
HOLDUP: 100 ms typical
(@ 120 V AC / 125 V DC)
IT IS RECOMMENDED THAT THE PQM BE POWERED UP AT LEAST ONCE PER YEAR
TO AVOID DETERIORATION OF THE ELECTROLYTIC CAPACITORS IN THE POWER
SUPPLY.
FUSE TYPE/RATING
5 × 20mm, 2.5 A, 250V
Slow blow, High breaking capacity
TYPE TESTS
DIELECTRIC STRENGTH: .......... 2.0 kV for 1 minute to relays, CTs, VTs, power supply
INSULATION RESISTANCE: ..... IEC255-5, 500 V DC
TRANSIENTS:................................ ANSI C37.90.1 Oscillatory
2.5 kV/1 MHz
ANSI C37.90.1 Fast Rise 5 kV/10 ns
Ontario Hydro A-28M-82
IEC255-4 Impulse/High Frequency Disturbance Class III Level
IMPULSE TEST:............................. IEC 255-5 0.5 Joule 5kV
RFI:.................................................... 50 MHz/15 W Transmitter
EMI:................................................... C37.90.2 Electromagnetic Interference @ 150 MHz and 450 MHz,
10V/m
STATIC: ........................................... IEC 801-2 Static Discharge
HUMIDITY:..................................... 95% non-condensing
TEMPERATURE:............................ –10°C to +60°C ambient
ENVIRONMENT: .......................... IEC 68-2-38 Temperature/Humidity Cycle
WARNING
Courtesy of NationalSwitchgear.com
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