GE PQMII-T20-C-A Power Quality Meter

Description

Product Model: GE PQMII-T20-C-A

• Product Brand: General Electric (GE)
• Product Series: Multilin PQM II Series
• Key Features:
  • High-accuracy monitoring of power quality parameters
  • Real-time metering and harmonic analysis
  • Event and waveform recording for system diagnostics
  • Advanced communication options for integration with SCADA/DCS

Applications & Industry Context

Power quality is a critical consideration in today’s electrical grids and industrial networks. Sensitive electronics, process equipment, and automated control systems all rely on clean and stable power. Voltage sags, harmonics, flicker, and transient disturbances can cause downtime, reduced equipment life, and costly inefficiencies.

The GE PQMII-T20-C-A, part of the GE Multilin PQM II series, provides comprehensive monitoring and analysis of electrical parameters in low, medium, and high-voltage systems. It is commonly applied in:

• Utilities & Substations – To monitor feeders, transformers, and switchgear performance.
• Industrial Facilities – For tracking energy efficiency, detecting harmonic distortion, and ensuring compliance with power standards.
• Data Centers – Where even minor disturbances can compromise uptime and cause operational losses.
• Oil & Gas & Mining – To maintain reliable power distribution for heavy machinery and critical pumps.
• Commercial Complexes – Ensuring compliance with power quality requirements and identifying inefficiencies.

The PQMII-T20-C-A helps engineers and facility managers understand the complete electrical environment, not only protecting assets but also improving operational efficiency.

Product Role & System Fit

The GE PQMII-T20-C-A is a microprocessor-based power quality meter designed for accurate, real-time measurement and monitoring. Unlike traditional meters, this device goes beyond kWh billing data — it captures advanced parameters such as harmonics, voltage imbalance, and power factor.

Within a protection and monitoring system, it:

• Serves as a stand-alone power quality monitor for individual feeders, transformers, or generators.
• Integrates into SCADA and DCS systems via Modbus, DNP3, or Ethernet protocols.
• Provides operators with waveform capture and event recording, allowing detailed post-fault analysis.
• Fits neatly into switchgear and control panels thanks to its modular, compact design.

By acting as both a meter and an analyzer, the GE PQMII-T20-C-A reduces the need for multiple devices, saving panel space and simplifying installation.

Technical Features & Benefits

The GE PQMII-T20-C-A offers a wide set of features that enhance performance, reliability, and diagnostics:

1. High-Accuracy Power Quality Monitoring
   • Measures RMS values for voltage, current, power, and frequency.
   • Captures harmonics up to the 63rd order for detailed distortion analysis.
2. Event and Waveform Recording
   • Stores data related to sags, swells, transients, and power interruptions.
   • Enables root-cause analysis for disturbances, improving system reliability.
3. Comprehensive Metering Capabilities
   • Measures kWh, kVARh, kVAh with billing-grade accuracy.
   • Provides power factor and demand calculations for energy efficiency initiatives.
4. Real-Time Monitoring & Trending
   • Provides graphical and tabular displays of power quality parameters.
   • Supports continuous monitoring for early detection of anomalies.
5. Flexible Communication
   • Compatible with Modbus RTU, Modbus TCP/IP, and DNP3 protocols.
   • Integrates smoothly with existing SCADA and automation platforms.
6. User-Friendly Interface
   • Equipped with a clear LCD display.
   • Front-panel navigation and programmable settings simplify use.
7. Industrial-Grade Design
   • Engineered for harsh environments with noise immunity and wide operating temperature.
   • Rugged housing ensures durability in field installations.
8. Compliance & Standards
   • Designed to meet IEEE and IEC power quality standards.
   • Helps organizations maintain compliance with utility regulations and ISO standards.

Technical Specifications

Installation & Maintenance Insights

The GE PQMII-T20-C-A is engineered for ease of integration into switchgear, MCCs, and distribution panels.

Installation Considerations:

• Use CTs and PTs with appropriate ratios for accurate metering.
• Ensure wiring is tight and shielded to reduce noise interference.
• Mount in a location with good visibility of the display for operators.

Maintenance Tips:

• Periodically check calibration against reference meters.
• Download and review event logs to anticipate developing issues.
• Update communication settings if SCADA/DCS platforms are upgraded.
• Keep firmware up to date for optimal performance and security patches.

Thanks to its robust design and diagnostics, the GE PQMII-T20-C-A requires minimal hands-on maintenance once installed.

Related Models

• GE PQMII-T20-C-B – Similar functionality with alternate communication modules.
• GE PQMII-T40-C-A – Higher model supporting additional I/O.
• GE PQMII Standard Versions – For applications where basic power metering is sufficient.
• GE Multilin 850 – Advanced feeder protection and monitoring relay.
• GE Multilin 369 – Motor management relay with integrated power monitoring.