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GE PQMII-C-A Power Quality Meter
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- Part Number: PQMII-C-A
- Brand: General Electric
- Type: Power Quality Meters
- Dimensions: 4x18.5x12.7cm
- Country of Origin: USA
- Barcode: 8537101190
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Additional Specifications
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Product Description
Configured for precise electrical parameter monitoring in AC distribution systems, the GE PQMII-C-A (PQMII Power Quality Meter) provides direct physical/electrical execution.
Suffix Breakdown & Model Matrix
The PQMII-C-A hardware model string defines specific factory options and functional card configurations:
- PQMII Base Series: Digital Power Quality Metering platform utilizing True RMS 64 samples/cycle processing.
- -C Suffix: Indicates integrated RS485 communication card option for networked Modbus RTU telemetry.
- -A Suffix: Control power input designation and analog output card configuration.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PQMII-C-A |
| Brand | GE |
| Origin | USA |
| Weight | Approx. 1.20 kg |
| Dimensions | Standard 1/4 DIN Panel Cutout (192 x 192 mm) |
| Operating Temp | -20 to +70 deg C |
| Power Consumption | Control Power Input Rails |
| Current Conversion | True RMS, 64 samples/cycle |
| CT Secondary Input | 1 A and 5 A secondary |
| CT Burden & Overload | 0.2 VA burden; 20x CT for 1 sec, 100x CT for 0.2 sec |
| Current Accuracy | ±0.2% of full scale (at <1.20x CT) |
| Voltage Input Range | 40 to 600 VAC (VT Ratio 1:1 to 3500:1) |
| Voltage Accuracy | ±0.2% of full scale |
| Harmonic Frequency | Up to 32nd harmonic analysis |
| Switch Inputs | Dry contacts (24 VDC @ 2 mA pulsed output, 1000 ohm max ON resistance) |
Backplane Bus Communication Velocity & I/O Scaling
The PQMII-C-A processes True RMS voltage and current waveforms at 64 samples per cycle, executing internal DSP calculation routines up to the 32nd harmonic. Channel-to-channel signal isolation across CT and VT inputs prevents ground loops, while high-velocity internal processing scales I/O density by mapping real-time metering values into 24 VDC pulsed switch input detection loops without cycle measurement degradation.
Frequently Asked Questions
Q: What are the current transformer (CT) overload thresholds supported by the PQMII-C-A?
A: The CT input circuitry withstands temporary current overloads up to 20 times nominal CT rating for 1 second, and up to 100 times nominal CT rating for 0.2 seconds.
Q: How does the module handle switch input signal sensing?
A: The switch inputs detect dry contact states using an internally generated 24 VDC at 2 mA pulsed output, requiring a maximum ON resistance of 1000 ohms and a minimum pulse duration of 100 ms.
Field Installation Guidelines
- Cut a standard 1/4 DIN opening in the panel door and insert the PQMII-C-A chassis, tightening the side mounting clips securely.
- Short-circuit secondary CT wiring blocks prior to terminating CT leads on the meter rear terminal strip to avoid lethal open-circuit voltages.
- Wire voltage inputs through inline 2 A fast-acting fuses to provide circuit protection during primary bus spikes.
- Ground the meter chassis and RS485 communication cable shields at a single point on the main earth bus stud.
- Torque all screw terminals on the rear connector block to 0.5 Nm to maintain electrical contact integrity.
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