PQMII-T-20-C-A GE Multilin PQMII Power Quality Energy Meter
Manufacturer: GE Fanuc
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Part Number: PQMII
Condition：New with Original Package
Product Type: Power Quality Meters
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
GE PQMII-T-20-C-A Power Quality Meter
Configured for power quality monitoring and energy management in medium- and low-voltage distribution systems, the GE PQMII-T-20-C-A (PQMII Power Quality Meter) provides direct physical/electrical execution. This panel-mounted hardware unit processes multi-phase electrical inputs to deliver continuous parameter measurement, harmonic breakdown, and automated disturbance recording. The internal processing engine directly interfaces with current and voltage inputs, providing physical control outputs via assignable relays based on real-time power factor and load thresholds.
Suffix Breakdown & Model Matrix
| Ordering Code Element | Selection | Description |
|---|---|---|
| Base Model | PQMII | Power Quality Meter base unit |
| Control Power / Transducer | T | 90–265 V AC or 100–300 V DC control power with analog outputs |
| Control Inputs / Outputs | 20 | 4 assignable output relays and 4 digital inputs |
| Communication Interface | C | RS485 port supporting Modbus RTU / DNP 3.0 protocol |
| Display / Option | A | Standard illuminated LCD display and front panel keypad |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PQMII-T-20-C-A |
| Brand | GE Multilin |
| Origin | Canada |
| Weight | 1.4 kg (3.0 lbs) |
| Dimensions | 19.1 cm x 10.9 cm x 12.7 cm (7.5 in x 4.3 in x 5.0 in) |
| Operating Temp | -20 deg C to +70 deg C |
| Power Consumption | 20 VA maximum |
| Input Voltage Range | 90–265 V AC / 100–300 V DC |
| Voltage Measurement Accuracy | +/- 0.2% Full Scale |
| Current Measurement Accuracy | +/- 0.2% Full Scale |
| Power Measurement Accuracy | +/- 0.5% Full Scale |
| Harmonic Spectrum Analysis | Up to 63rd harmonic, THD, TIF |
| Event Logging Capacity | 150 events (Event Recorder), 500 events (VDR) |
| Data Logger Storage | Up to 98,000 recorded events |
| Relay Output Contact Rating | 250 VAC, 8 A continuous |
| Digital Inputs | 4 dry contact inputs |
| Serial Communications | Front RS232, Rear RS485 (Modbus RTU / DNP 3.0) |
Industrial Network & Backplane Integration
The GE PQMII-T-20-C-A establishes deterministic field-bus communication over rear RS485 serial channels, transmitting digitized parameters directly to higher-tier DCS or SCADA master stations. Internal processing hardware prioritizes backplane data exchange speed to minimize latency during high-frequency data logging and waveform extraction. Firmware flash compatibility ensures uniform instruction execution during intensive math-heavy calculations, including real-time vector analysis and Fast Fourier Transforms (FFT) up to the 63rd harmonic. Electrical channel-to-channel isolation safeguards internal microprocessor circuits from field-side voltage transients and ground potential differences across industrial switchgear lineups.
Frequently Asked Questions
Q: How does the internal voltage disturbance recorder respond to sag and swell occurrences on the monitored bus?
A: The system automatically captures transient deviation events exceeding pre-programmed thresholds. It logs up to 500 Voltage Disturbance Recorder (VDR) events into non-volatile internal memory, recording timestamps, durations, and magnitude profiles without disrupting ongoing continuous parameter polling.
Q: What are the electrical wiring requirements for the control output relay contacts when switching inductive loads?
A: The four assignable output relays support continuous resistive loads up to 250 VAC at 8 A. When switching inductive loads such as heavy contactors or solenoid coils, technicians must install external RC suppressors or flyback diodes across the load to prevent arc induced contact degradation and electromagnetic interference.
Q: How is serial network termination handled on the rear RS485 Modbus RTU interface?
A: Terminate the RS485 communication line by installing a 120 ohm, 0.25 W resistor across the positive and negative differential data terminals of the final device on the daisy-chain bus. Ensure shield continuity throughout the cable run while grounding the shield drain wire at one end only.
Field Installation Guidelines
Mounting the GE PQMII-T-20-C-A requires a standard panel cutout following panel-flush installation standards. Installers must secure the metal housing using the provided mounting brackets to ensure proper physical retention and ground continuity through the panel structure. Secure a dedicated copper protective earth wire directly to the rear chassis ground stud prior to applying external wiring connections.
Route control power lines, current transformer (CT) secondaries, and potential transformer (PT) signals in separate wire conduits to prevent inductive coupling. CT secondary wiring must remain grounded at a single point near the switchgear block, maintaining tight terminal screw torque settings to eliminate open-circuit secondary high voltage risks. Shielded twisted-pair cabling (minimum 24 AWG) must be utilized for rear RS485 serial communication runs. Strip wire ends to specified strip lengths without damaging conductor strands, ensuring no bare wire extends beyond the terminal block housing after clamping.