Digital guide
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GE TMQV32125
- Product Name: TMQV32 Series Electronic Trip Unit (125 A)
- Product Introduction: An electronic trip unit in the TMQV32 series, designed for use with GE Power Break II/III low-voltage frame circuit breakers. The suffix “125” denotes a 125 A rated current. It provides LSIG (Long-time, Short-time, Instantaneous, Ground) four-stage protection.
Detailed content
- Technical Specifications:
- Rated Current (In): 125 A
- Poles: 3P / 4P selectable
- Protection Functions: LSIG four-stage
- L (Long-time): Ir = 0.4–1.0 In, tr = 1–60 s
- S (Short-time): Isd = 1.5–10 In, tsd = 0–0.4 s
- I (Instantaneous): Ii = 1.5–15 In, D-curve
- G (Ground): Ig = 0.2–1.0 In, tg = 0–0.4 s
- Short-circuit Breaking Capacity: up to 65 kA @ 480 V AC (in conjunction with the breaker)
- Power Supply: Self-powered via current transformer (CT)
- Optional Communication: Modbus RTU
- Operating Temperature: –25 °C to +70 °C
- Measurement Accuracy: ±5%
- Instantaneous Trip Time: < 20 ms (at 2× setpoint)
- Power Consumption: < 5 W
- Communication Baud Rate: 9600 / 19200 / 38400 bps
- Material Composition: Flame-retardant PC/ABS housing (UL94 V-0); FR-4 PCB with conformal coating; quick-connect plug-in connectors.
- Structural Features: Modular plug-in design that fits Power Break II/III breakers; front-panel LED display with 4-key programming; bottom plug-in connection to the breaker.
- Functional Features: LED digital display with 4-button programming; records up to 16 fault events; optional Modbus RTU remote communication.
- Working Principle: The CT acquires current signals; the internal microprocessor calculates the four-stage protection conditions in real time and outputs a trip signal when any stage is triggered.
- Application Scenarios: Feeder circuits in commercial buildings, industrial plants, and power distribution panels requiring selective coordination and ground-fault protection.
- Installation Requirements: Install as a plug-in module into the designated slot of a compatible Power Break II/III breaker. Ensure proper torque on all terminal connections.
- Usage Notes: Verify the current setting matches the protected circuit. For Modbus communication, ensure correct wiring polarity and baud-rate matching. Record fault event logs periodically for predictive maintenance.
