GE PQMII-C Power Quality Meter

The GE Multilin PQMII-C, also cataloged as the PQMII Power Quality Meter, operates as a dedicated hardware component for voltage, frequency, power factor tracking, and output relay execution within electrical power distribution networks.

Hardware Specifications

Power Protection Matrix and Signal Execution

• Voltage and Frequency Threshold Tracking The device executes continuous monitoring routines across programmable phase profiles (any one, any two, or all three phases) when a minimum required voltage of 20 V is applied. Under-voltage and over-voltage tracking spans 0.50 to 1.25 x VT, while frequency circuits evaluate thresholds between 20 and 70.00 Hz with a strict level accuracy of plus or minus 0.02 Hz.
• Pulse Output and Relay Matrix Execution Integrated energy logging subroutines capture positive/negative kWh, positive/negative kvarh, and total kVAh variables. The hardware translates these metrics into physical pulse outputs across an interval scale of 1 to 65000, managing pulse widths up to 2000 ms with a 500 ms minimum pause layer. Inductive and resistive output relays break 5 A loads up to 250 VAC/VDC during fault events.

Frequently Asked Questions

Q: What are the concrete timing accuracy boundaries for frequency versus voltage fault steps?

A: Frequency monitoring subroutines (overfrequency and underfrequency) execute with a strict timing accuracy threshold of plus or minus 3 cycles. Voltage manipulation parameters (overvoltage and undervoltage) operate within a time delay window bounded by -0/+1 second limits from the configured setpoint.

Q: How does the power supply holdup metric affect control network stability during localized main line dropouts?

A: The internal control power transformer maintains a 100 ms typical holdup duration when operating at 120 VAC/VDC. This layout isolates the monitoring logic from micro-interruptions and transient voltage sags, preventing accidental dropout relay drops or uncommanded device reboots.