GE PQMII-T20 Multilin Three-Phase Power Quality Meter

PQMII-T20 is a compact integrated power quality monitor under GE Multilin PQMII series, designed for full-time monitoring of three-phase 3-wire/4-wire power distribution systems. It integrates high-precision energy metering, harmonic analysis and transient disturbance recording functions, measuring core electrical parameters including voltage, current, active/reactive power, energy and power factor, and capturing voltage sags, swells and waveform distortion faults in real time.

This DIN rail panel-mounted meter adopts industrial reinforced casing with anti-electromagnetic interference design, equipped with T20 4-20mA analog output option. It supports multi-protocol communication including Modbus RTU and DNP3.0, built-in large-capacity storage for 500 disturbance event logs, and configurable relay outputs for automatic alarm and control linkage, widely deployed in industrial power plants, commercial buildings and new energy power distribution cabinets.

Main Specifications

• Brand: GE General Electric Multilin; Model: PQMII-T20; Series: PQMII Power Quality Monitoring Meter
• Measurement System: 3-phase 3-wire / 4-wire compatible, CT input 1A or 5A programmable
• Metering Accuracy: Class 0.5 energy measurement, ±0.2% voltage/current reading, harmonic precision ±2%
• Signal Analysis: Supports THD and individual harmonic detection up to 63rd order, 64kHz high-speed sampling for transients
• I/O Configuration: 4 programmable relay outputs, T20 dedicated 4-20mA analog output (max load 600Ω), 2 digital inputs
• Communication Ports: Dual isolated RS485, RS232 debug port, optional Ethernet 10/100Base-T; Modbus RTU/TCP, DNP3.0 protocols
• Storage Capacity: 1MB internal memory, stores 500 voltage sag/swell disturbance records with time stamp
• Power Supply: 70–265VAC / 90–300VDC wide range auxiliary power, rated power consumption 10VA, peak 20VA
• Operating Environment: -20℃ ~ +60℃ working temperature, 5%–95% RH non-condensing, industrial anti-vibration standard
• Configuration Tool: GE EnerVista software for parameter setting, data viewing and fault waveform export
• Certifications: CE, UL, IEC 62053-22 energy metering compliance, industrial power grid safety certification

Core Functions

• Continuously collect full-set electrical parameters of distribution loops, including voltage, current, power, power factor, frequency and bidirectional energy consumption statistics.
• High-speed sampling captures power transients, records voltage sag/swell events and stores complete pre/post-trigger fault waveforms for post-failure analysis.
• Real-time harmonic monitoring detects waveform distortion caused by inverters and variable frequency drives, providing data basis for power filter optimization.
• 4 programmable relay outputs trigger audible/visual alarms or control capacitor banks once power quality parameters exceed customized threshold setpoints.
• Dual isolated communication interfaces enable simultaneous data upload to SCADA, DCS and building management systems for centralized power monitoring.
• Built-in self-diagnosis function automatically detects CT disconnection, PT abnormal and internal circuit drift faults, uploading alarm logs via communication bus.

Application Scenarios

• Power quality monitoring spare meter for thermal power plants, combined cycle power stations and hydropower generator distribution cabinets.
• Harmonic and energy metering equipment for petrochemical factories, large industrial motor MCC rooms and offshore power generation platforms.
• Sub-metering and power fault diagnosis devices for commercial data centers, high-rise office buildings and shopping mall power distribution rooms.
• Monitoring meter for photovoltaic, wind power new energy grid-connected cabinets and energy storage system power loops.
• Retrofit replacement for aging power monitoring instruments with inaccurate metering and missing disturbance recording functions.

• Global aftermarket spare inventory for power plant automation and electrical maintenance teams worldwide.