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The GE PQMII-T20-C-A is an advanced Power Quality Meter from GE Multilin (now GE Vernova), designed for continuous monitoring and analysis of three-phase electrical systems. Combining metering, power quality diagnostics, control functions, and transducer capabilities, the GE PQMII-T20-C-A provides accurate true RMS measurements of voltage, current, power, energy, demand, harmonics (up to the 63rd), and disturbances such as sags/swells. The GE PQMII-T20-C-A is ideal for industrial plants, utilities, commercial buildings, motor control centers, capacitor banks, generators, and transformers where reliable power monitoring, alarming, load shedding, and power factor correction are required. With its 40-character illuminated display, keypad, four assignable Form-C relays, four switch inputs, harmonic analysis, waveform capture, event recorder, data logger, and Voltage Disturbance Recorder (VDR), the GE PQMII-T20-C-A delivers comprehensive power quality insights. The transducer option (T20) adds four isolated 4-20 mA analog outputs and one analog input, while the control (C) and power analysis (A) options enhance relay/switch functionality and advanced diagnostics. The GE PQMII-T20-C-A supports Modbus RTU and DNP 3.0 protocols over dual RS485 ports (plus front RS232), enabling seamless integration with SCADA, PLCs, or DCS systems via EnerVista software. Although a legacy model, the GE PQMII-T20-C-A remains widely supported for retrofits and maintenance in critical power applications.

Model,GE PQMII-T20-C-A

Manufacturer,GE Multilin (GE Vernova)

Series,PQM II Power Quality Meter

Product Type,Three-Phase Power Quality & Energy Meter

Options Breakdown,"T20: 4 isolated 4-20 mA analog outputs + 1 analog input + 2nd RS485

C: Control (4 Form-C relays total + 4 switch inputs)

A: Power Analysis (harmonics, waveform capture, event recorder, data logger, VDR)"

Control Power,"90–300 VDC / 70–265 VAC, 50/60 Hz (standard); optional low-voltage MOD 501"

Current Inputs,1 A or 5 A CT secondary (configurable primary)

Voltage Inputs,Direct or VT (40–600 VAC nominal)

Analog Outputs (T20),"4 isolated 4-20 mA (or 0-20 mA), assignable, ±1% accuracy, 600 Ω max burden"

Analog Input,1 × 4-20 mA

Relay Outputs,"4 Form-C (5 A continuous, 250 VAC / 30 VDC)"

Switch Inputs,4 dry-contact

Communications,"Front RS232; Rear dual RS485 (Modbus RTU, DNP 3.0); optional Ethernet via MultiNet"

Harmonic Analysis,"Up to 63rd harmonic, THD, TIF, K-factor, crest factor"

Data Logging,"Event recorder (150 events), VDR (500 disturbances), data logger (~98,000 events)"

Display,40-character illuminated LCD with keypad

Operating Temperature,-10°C to +60°C

Mounting,Panel mount

Additional Features,"True RMS metering, waveform capture (256 samples/cycle), pulse I/O, EnerVista software support"

Mount the GE PQMII-T20-C-A in the panel cutout and connect control power (90–300 VDC / 70–265 VAC).

Wire CTs (phase + optional neutral) and VTs (or direct voltage) to the appropriate terminals with correct polarity and ratios.

Connect field wiring for the 4 switch inputs, 4 relay outputs, and analog I/O (T20).

Link RS485 (COM1/COM2) to the supervisory system or PC; use front RS232 for local setup.

Power up and use the keypad/display or EnerVista software to enter setpoints: CT/VT ratios, wiring configuration, scaling, alarms, and assignable parameters.

Monitor real-time metering values, harmonics, power quality trends, and alarms on the display or via software.

Review event logs, waveform captures, and disturbance records; configure relays for control actions such as load shedding or capacitor switching.

De-energize all power sources (control and measurement circuits) before wiring or installing the GE PQMII-T20-C-A to avoid electrical hazards.

Use proper ESD protection when handling the unit and ensure solid grounding of the chassis.

Connect CT secondaries with shorting blocks during installation; never leave CTs open-circuited.

Verify control power matches the label (standard 90–300 VDC/70–265 VAC) and wire with adequate gauge for the VA load.

Route communication cables (RS485) as twisted-pair shielded with proper termination (120 Ω resistor + capacitor if needed) and separate from high-voltage lines.

Tighten all terminal screws to the recommended torque and label wiring clearly for future maintenance.

After installation, perform secondary injection tests on CT/VT inputs, test relays and analog outputs, and confirm communication before placing the system online.

Check the front-panel display and status LEDs daily on the GE PQMII-T20-C-A for normal operation, active alarms, or communication issues.

Monitor key metering values (voltage, current, power factor, THD) and review any triggered events or disturbances via the display or EnerVista software.

Inspect rear terminals and wiring connections weekly for tightness, corrosion, or signs of overheating, especially CT/VT and relay outputs.

Verify analog output signals (T20) and switch input status match expected process values.

Review event recorder, data logger, and VDR logs periodically to identify recurring power quality issues (sags, swells, harmonics).

Clean the front panel and vents (unit powered off) with a soft cloth or low-pressure air every 1–3 months to maintain visibility and cooling.

During scheduled outages, test relay operation, analog I/O accuracy, and perform firmware checks or full system diagnostics; backup setpoints and logs via EnerVista.

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Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.