GE PQMII-T20-C-A Power Quality Meter

The GE PQMII-T20-C-A Power Quality Meter is a powerful and widely used power quality monitoring device launched by General Electric (GE). Here is a detailed introduction to it:

Functional Features
- Comprehensive Measurement Function: It can measure key electrical parameters such as current, voltage, active power, reactive power, apparent power, energy usage, electricity cost, power factor, and frequency. It can also perform harmonic analysis, measuring up to the 50th harmonic, to evaluate the power quality of the power system.
- Waveform Analysis and Capture: It can capture and display voltage and current waveforms, which is used to diagnose waveform distortion or aberration problems in the power system and help engineers analyze faults and abnormalities in the power system.
- Event Recording Function: It can monitor and record voltage sags and swells, and store up to 500 voltage sag/swell events, facilitating the analysis of power grid stability and power quality issues.
- Flexible Control Functions: The device includes programmable setpoints and 4 assignable output relays, allowing users to add control functions for specific applications, such as over/under current or voltage alarms, unbalance monitoring, demand-based load shedding, and capacitor power factor correction control.
- Convenient Data Communication: It supports communication protocols such as DNP 3.0 and Modbus RTU, and can be seamlessly integrated with modern energy management systems or other automation systems through the RS-485 interface to achieve remote monitoring and management.
- Data Storage and Trend Analysis: It has a certain data storage capacity, which can store electrical parameter data for many years, making it convenient for users to query and analyze historical data. It can also conduct trend analysis on the data to help users detect potential power quality problems in advance.

Technical Parameters
- Voltage Input: 100-240V AC, 50/60Hz.
- Current Input: 0-5A AC.
- Frequency Range: 45-65Hz.
- Power Consumption: <5VA.
- Accuracy: The measurement accuracy of voltage and current is ±0.5%, and the measurement accuracy of power factor is ±1%.
- Communication Interface: RS485 (Modbus RTU).
- Operating Temperature: -20℃ to +70℃.
- Storage Temperature: -40℃ to +85℃.
- Humidity: 5%-95% without condensation.
Application Scenarios
- Industrial Field: It is used to monitor the power quality of industrial production equipment, ensure the stability and continuity of the production process, prevent equipment failures and production interruptions caused by power quality problems, and reduce maintenance costs and production losses.
- Commercial Field: It can ensure the normal operation of various sensitive equipment such as computers, servers, and elevators in commercial places like shopping malls, office buildings, and hotels, and improve the reliability and service quality of commercial operations.
- Power Industry: In power facilities such as substations and distribution stations, it conducts real-time monitoring and analysis of the power quality of the power grid, helping power operators optimize grid operation, improve power supply reliability and power quality, and meet users’ demand for high-quality electricity.
- Public Utilities Field: In public utility places such as hospitals, schools, and transportation hubs, it ensures the normal operation of key equipment and guarantees the continuity and stability of public services.
- The PQM II is an ideal choice when continuous monitoring of a three phase system is required. It provides metering for current, voltage, real and reactive power, energy use, cost of power, power factor and frequency. Programmable setpoints and 4 assignable output relays allow control functions to be added for specific applications. This includes basic alarm on over/under current or voltage, unbalance, demand based load shedding, and capacitor power factor correction control. More complex control is possible using the 4 switch inputs which also can be used for status such as breaker open/closed, flow information etc.
  
  New In Version 2.10:
  - Voltage Disturbance Recorder (VDR) to monitor voltage dips (voltage sags) and voltage spikes (voltage swells) with capacity for 500 sag/swell events.
  - DNP 3.0 Communications Protocol standard feature.
  Features and Benefits
  - Mounting Versatility
  - Keypad with large illuminated 40-character display
  - Any assignable output may be used to trigger an alarm
  - May be connected to DCA or SCADA systems
  - Flash upgradeable
  - Compatible with MultiNet Serial to Ethernet Converter
  Applications
  - Metering of distribution feeders, transformers, generators, capacitor banks and motors
  - Medium and low voltage systems
  - Commercial, industrial, utility
  - Flexible control for demand load shedding, power factor, etc.
  - Power Quality analysis tool
  Protection and Control
  - A V W var VA varh Wh PF Hz unbalance
  - A W var VA demand
  - Load shedding
  - Power factor control
  - Pulse input totalizing
  Monitoring and Metering
  - Ia Ib Ic In
  - Va Vb Vc Vab Vbc Vca
  - V I unbalance
  - True PF crest and K factor
  - Hz W var VA
  - Wh varh VAh W cost
  - Demand: A W var VA
  - Harmonic analysis through 63rd with THD and TIF
  - Event recorder – 150 events
  - Waveform capture
  - Data logger – 98,000 events
  - Voltage Disturbance Recorder (VDR)
  User Interface
  - Front RS232 serial port (1,200 to 19,200 bps)
  - Two Rear RS485 serial ports
  - Ethernet connectivity provided by MultiNet
  - EnerVista software is provided for setup and monitoring functions
  - Dial-in modem capabilities