Power Quality Meter GE PQM-T20-C-A | PQM II Industrial Monitoring

GE PQM-T20-C-A Power Quality Meter

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The GE PQM-T20-C-A is a multifunction power quality meter designed for facilities that rely on accurate electrical performance monitoring. It captures a broad range of measurements, allowing engineers to diagnose disturbances before they affect equipment health. Moreover, its advanced data-logging capability helps teams analyze events with greater precision, especially in systems where voltage and current conditions change frequently.

The meter supports flexible communication options, making integration easier in existing SCADA or energy-management platforms. In addition, the PQM-T20-C-A includes configurable relays that allow automated control actions such as capacitor switching or load shedding. Many operators choose this model because it offers harmonic analysis, disturbance recording, and scalable accuracy in a compact and durable enclosure.

Technical Specifications

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General Information
• Manufacturer: General Electric (GE)
• Model Number: PQM-T20-C-A (PQM II Series)
• Product Type: Power Quality Meter
• Measurement class: 0.5S accuracy
• Weight: 3.0 lbs

Power Supply & Input Ratings
• Operating voltage: 20–60 VDC or 20–48 VAC
• Frequency: 50/60 Hz
• Power consumption: approx. 20 VA
• Voltage input: 90–600 V (L-L) via VT scaling
• Current input: 0.1–20 A via CT scaling

Measured Parameters
• Voltage (phase and line)
• Current (phase and neutral)
• Real, reactive, and apparent power
• Frequency and power factor
• Energy (kWh) and demand
• Harmonics up to 50th order
• THD, TDD, and unbalance detection

Control & I/O Capabilities
• Analog input: One 4–20 mA input
• Relay outputs: Four programmable relays
• Digital inputs: Four switch inputs
• Analog outputs: Four isolated analog outputs for control or alarm setpoints

Communication Interfaces
• RS-485 Modbus RTU (rear ports)
• RS-232 (front port)
• Modbus TCP/IP (Ethernet)

Data Logging & Analysis
• Event recording: Up to 10,000 events
• Waveform capture for disturbance analysis
• Demand and energy trending

Physical & Environmental Ratings
• Display: Backlit LCD
• Dimensions: 96 × 96 × 75 mm
• Operating temperature: –10 °C to +55 °C
• Optional conformal coating for harsh environments

FAQ

Q1: Does the PQM-T20-C-A support harmonic analysis for industrial equipment?
A1: Yes, it measures harmonics up to the 50th order and provides THD and TDD values.

Q2: Can this meter integrate into Modbus-based SCADA systems?
A2: It supports both RS-485 Modbus RTU and Modbus TCP/IP, ensuring broad compatibility.

Q3: What types of control functions can the relays perform?
A3: Relays can be assigned to alarms, load shedding, capacitor control, and custom setpoints.

Q4: Is waveform capture available for disturbance analysis?
A4: Yes, the meter records waveforms and stores detailed event data for troubleshooting.

Q5: What is the required operating voltage for the device?
A5: It operates from 20–60 VDC or 20–48 VAC, depending on the installation.