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GE PQM-T20-C-A | Direct Replacement Three-Phase Power Analysis Meter

GE PQM-T20-C-A | Direct Replacement Three-Phase Power Analysis Meter

Original price was: $999.00.Current price is: $88.00.

  • Model: PQM-T20-C-A
  • Brand: GE General Electric
  • Series: PQM Power Quality Monitoring Platform
  • Core Function: Captures three-phase electrical measurements, performs harmonic analysis, records voltage disturbances and delivers data for SCADA and energy management systems
  • Category: Power Quality Monitor / Multifunction Power Meter
  • Key Specs: Front RS232 + dual RS485, 4 analog outputs, waveform capture, harmonic analysis package
  • Availability & Condition: New Surplus, In Stock, Ready for immediate dispatch
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Category: SKU: PQM-T20-C-A Tags: Brand:
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  • +86 13313703791
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100,000+ Models in Stock
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One-Year Warranty
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24h Fast Response

Description

3. Key Technical Specifications

  • Supported System: Three-phase 3-wire / three-phase 4-wire, CT/VT instrument transformer input
  • Control Power Range: 85–250 VAC or 24–250 VDC
  • Measurement Accuracy: Class 0.5 for active energy metering
  • Harmonic Analysis: Up to 50th harmonic order, THD calculation
  • Communication Interfaces: Front-panel RS232, dual rear RS485
  • Supported Protocols: Modbus RTU, DNP 3.0
  • Digital I/O: 4 programmable switch inputs, 4 programmable alarm relay outputs
  • Analog Outputs: 4 isolated assignable 0–20 mA / 4–20 mA channels
  • Event Storage: Disturbance recorder for voltage sag, swell and transient logging
  • Operating Temperature: -20 °C to +60 °C, non-condensing
  • Humidity Tolerance: 5%–95% RH
  • Mounting: Standard panel cutout installation
  • Form Factor: Front LCD display with integrated keypad for local configuration

4. Product Introduction

When unexplained variable-speed drive faults or equipment overheating occur across a distribution network, undetected harmonic distortion and voltage transients often remain unlogged. Operating as a standalone power diagnostic unit, the PQM-T20-C-A samples three-phase voltage and current continuously to quantify power quality deviations inside industrial switchgear and MCC rooms.Unlike basic revenue-grade energy meters, this unit carries dedicated trace memory to capture transient waveform snapshots during abnormal events. Honestly, built-in disturbance recording eliminates the need for separate portable analyzers during outage post-mortem investigations.

 

5. QC, Procurement & Logistics SOP

  1. Inbound Verification: Confirm full PQM-T20-C-A part marking, inspect front display surface, keypad membrane and rear terminal blocks for damage. Cross-reference serial identifiers against global procurement portal records.
  2. Live Rig Testing: Complete power-on initialization, analog output calibration, RS485 Modbus communication validation, and simulated event trigger testing to confirm all measurement and logging functions operate correctly.
  3. QA & Anti-Static Packaging: Protect LCD screen with protective film, place unit inside static shielding bag and foam-lined carton; attach signed bench test report to each shipment.
  4. Global Logistics & Export Compliance: Assign accurate HS classification for electrical power monitoring instruments. Reinforced outer packaging suitable for air freight or sea freight —though customs clearance in the EU might add 2 days to transit timelines.

6. Technical Pitfalls & Integration Warnings

  1. Configuration Parameter Mismatch: CT and VT scaling settings do not transfer automatically when swapping units. A technician loading generic preset values will deliver incorrect power and energy readings to the SCADA host.
  2. Communication Wiring errors: RS485 bus termination and polarity mistakes cause intermittent register read failures. Star topology wiring instead of daisy-chain layout amplifies signal noise on multi-drop networks.
  3. I/O Assignment Conflicts: Relay and analog output setpoints must be recreated after replacement. Copying configuration from PQMII series units creates unsupported logic triggers.
  4. ESD destruction during unboxing: Front panel and internal measurement circuitry are sensitive to static discharge. Minor damage may only surface under high electrical noise during production load cycles.

 

7. Frequently Asked Questions (FAQ)

Q: What global lead times apply if available inventory runs out?A: Standard sourcing lead time runs 6–9 weeks. Expedited sourcing options can shorten delivery to 15–22 working days, subject to upstream stock availability.Q: Can I remove and swap this meter while the control power supply remains energized?A: Hot swap is not recommended. Isolate auxiliary control power before disconnection to avoid transient spikes that corrupt stored event logs.Q: Does PQM-T20-C-A share configuration files with newer PQMII-T20 series meters?A: Hardware register mapping differs. Project files built for PQMII cannot be loaded directly; all alarm thresholds and scaling require manual reconfiguration.Q: What shipping options exist for cross-border industrial spare deliveries?A: Air express for urgent switchgear maintenance, standard air freight for scheduled outages, and sea freight for bulk spare part orders. Complete export documentation accompanies every shipment.Q: Can I run this unit without CT/VT transformers for direct low-voltage measurement?A: This model is designed exclusively for instrument transformer inputs. Direct line voltage connection will permanently damage internal measurement circuits.Q: What warranty coverage applies to New Surplus units?A: Each unit carries a 12-month limited warranty covering verified bench test failures. Warranty excludes damage caused by incorrect wiring, overvoltage transients, or cracked display panels.Q: Can logged disturbance data be extracted directly via the front RS232 port?A: Yes. Local data retrieval works via front serial connection, while continuous real-time parameter transfer to control systems relies on the rear RS485 Modbus ports.

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