GE PQMII-T20

Technical Specifications

• Manufacturer: GE Multilin (GE Vernova)
• Product Series: PQMII Series Power Quality Meters
• Part Number: PQMII – T20
• Meter Type: Three – Phase Power Quality Meter
• Measurement Parameters: Voltage (phase – to – phase, phase – to – neutral); Current (phase, neutral); Frequency (45 – 65 Hz); Real/reactive/apparent power; Power factor; Energy (import/export, kWh/kVARh/kVAh); Harmonics (up to 63rd, THD); Voltage sags/swells/flicker; Transient events
• Input Voltage: Voltage inputs: 57.7/100 V, 277/480 V, 380/660 V (configurable); Control power: 20 – 60 VDC, 20 – 48 VAC (50/60 Hz)
• Input Current: 5 A (standard); 1 A (optional)
• Sampling Rate: 128 samples per cycle (6.4 kHz for 50 Hz, 7.68 kHz for 60 Hz)
• Harmonic Analysis: Up to 63rd harmonic, total harmonic distortion (THD) measurement for voltage and current
• Data Logging: Internal non – volatile memory (10,000 event records; 1 year of trend data at 15 – minute intervals)
• Analog I/O: 1 isolated 4 – 20 mA input; 4 isolated 4 – 20 mA outputs (configurable for any measured parameter)
• Digital I/O: 4 digital inputs (dry contact); 4 SPDT relay outputs (250 VAC/30 VDC, 5 A)
• Communication Interfaces: 2×RS – 485 (Modbus RTU), 1×RS – 232 (local configuration); Optional Ethernet (Modbus TCP/IP, DNP3.0)
• Display: 4 – line LCD with backlight, push – button keypad for configuration
• Power Consumption: 20 VA (max)
• Operating Temperature: – 25°C to +70°C (- 13°F to +158°F)
• Storage Temperature: – 40°C to +85°C (- 40°F to +185°F)
• Humidity Range: 5% – 95% non – condensing
• Dimensions: 133 mm × 70.8 mm × 39.3 mm (5.24″ × 2.79″ × 1.55″)
• Weight: 1 kg (2.2 lb)
• Certifications: UL 61010 – 1, CE, IEC 61010 – 1, IEC 61000 – 4 – 30 Class A, RoHS compliant

Functional Features

• Comprehensive Parameter Measurement: Measures all key electrical parameters and energy consumption with revenue – grade accuracy, meeting IEC 61036 standards.
• Advanced Harmonic Analysis: Analyzes up to the 63rd harmonic and THD for voltage and current, identifying harmonic – related issues in power systems.
• Transient Event Capture: High – speed sampling captures voltage sags, swells, flicker, and transient events, with detailed waveform recording for root – cause analysis.
• Flexible I/O Configuration: 4 isolated 4 – 20 mA outputs and 4 relay outputs can be programmed to trigger alarms or control actions based on user – defined thresholds.
• Multi – Protocol Communication: Supports Modbus RTU/TCP, DNP3.0, and serial interfaces for seamless integration with SCADA, PLC, and energy management systems.
• Long – Term Data Logging: Internal memory stores extensive event and trend data for compliance reporting, troubleshooting, and energy optimization.
• Rugged Industrial Design: Operates in – 25°C to +70°C temperature range, with protection against dust and moisture for reliable performance in harsh environments.
• User – Friendly Operation: LCD display and push – button keypad allow on – site configuration; PC – based software enables remote setup and data analysis.
• Revenue – Grade Metering: Meets ANSI C12.20 and IEC 61036 accuracy standards for energy billing applications.
• Self – Monitoring: Continuous self – diagnostics detect internal faults, sensor errors, and communication failures, triggering relay alarms for proactive maintenance.

Application Scenarios

• Power Utilities: Substation power quality monitoring, distribution network harmonic analysis, and voltage disturbance recording to ensure grid stability and compliance with regulatory standards.
• Industrial Manufacturing: Monitoring of motor control centers, switchgear, and critical production lines to prevent downtime caused by power quality issues; energy sub – metering for cost allocation.
• Data Centers: Protection of IT equipment from voltage sags/swells and harmonics; energy management for optimizing UPS and cooling system efficiency.
• Renewable Energy Integration: Monitoring of solar/wind farm grid – connection points to assess harmonic injection and voltage stability; compliance with grid code requirements.
• Commercial Buildings: Energy metering for HVAC, lighting, and elevators; power factor correction control to reduce utility penalties.
• Oil & Gas Facilities: Monitoring of offshore platforms, refineries, and pipeline pump stations to ensure reliable operation of critical process equipment.
• Mining & Metals: Power quality monitoring in crusher plants, conveyor systems, and smelters to protect large motors and drives from voltage fluctuations.
• Healthcare Facilities: Protection of medical equipment from power disturbances; compliance with NFPA 99 standards for reliable power supply.
• Transportation Infrastructure: Railway traction power monitoring, airport electrical system analysis, and port crane power quality assessment.

Compatibility

• Controllers: GE PACSystems RX3i/RX7i, Siemens S7, Rockwell ControlLogix, Schneider Modicon
• Communication Protocols: Modbus RTU/TCP, DNP3.0, IEC 60870 – 5 – 101/104 (optional)
• Software: GE Multilin EnerVista PQMII Setup Software (for configuration and data analysis)
• Power Supply: 20 – 60 VDC or 20 – 48 VAC control power sources
• Current Transformers: 5 A or 1 A secondary current transformers (standard for three – phase systems)
• Voltage Transformers: 57.7/100 V, 277/480 V, 380/660 V voltage transformers (configurable)

Installation Notes

1. Mounting: Install in a standard 19 – inch rack or panel – mount using the provided brackets; ensure 50 mm clearance for ventilation.
2. Wiring: Connect voltage inputs to PT secondary circuits (57.7/100 V, etc.); connect current inputs to CT secondary circuits (5 A/1 A); use shielded cables for all analog and communication wiring to minimize noise.
3. Power Connection: Connect control power (20 – 60 VDC or 20 – 48 VAC) with reverse polarity protection.
4. Configuration: Use the front – panel keypad or EnerVista PQMII software to set voltage/current ranges, harmonic limits, alarm thresholds, and communication parameters.
5. Calibration: Factory calibrated to ANSI C12.20/IEC 61036 standards; annual recalibration recommended for revenue – grade applications.
6. Communication Setup: Configure Modbus addresses, baud rates, and parity for RS – 485/RS – 232; set up Ethernet parameters (IP address, subnet mask) for optional Ethernet module.
7. Testing: After installation, verify voltage/current readings against reference meters; test alarm relays and analog outputs with known input values.

Key Advantages

• Comprehensive Monitoring: Measures all critical power parameters and harmonics up to the 63rd, providing a complete view of power quality.
• High – Speed Transient Capture: 128 samples per cycle sampling rate captures fast – moving voltage and current transients for accurate root – cause analysis.
• Flexible I/O & Communication: Multiple analog/digital I/O and multi – protocol communication enable seamless integration with control and monitoring systems.
• Revenue – Grade Accuracy: Complies with ANSI C12.20 and IEC 61036 standards, suitable for energy billing and cost allocation.
• Rugged & Reliable: Operates in extreme temperatures and harsh industrial environments, with continuous self – monitoring for proactive maintenance.
• User – Friendly: Intuitive LCD interface and PC software simplify configuration, data retrieval, and analysis.
• Long – Term Data Logging: Stores extensive event and trend data for compliance reporting and historical analysis.
• Cost – Effective: Reduces downtime, optimizes energy usage, and minimizes equipment damage caused by power quality issues.