Bachmann|GMP232|Power Measurement Protection Module
Bachmann GMP232 Overview
The Bachmann GMP232 is a high-precision power measurement and protection module designed for real-time monitoring and control in three-phase electrical systems.
Features
- Measures voltage, current, frequency, power, harmonics up to 50th order
- Direct relay outputs for circuit breaker control
- Event logging and disturbance recording (COMTRADE)
- IEEE 1588 time synchronization
- Configurable protection functions per ANSI/IEC standards
Technical Specifications
Measurement
Voltage Inputs
- 3 phases + neutral
- Models:
- 120V CAT IV (/12, /32): 70V (Y) / 120V (Δ), ±0.1% accuracy, >3.2 MΩ impedance
- 690V CAT III (/22, /42): 400V / 690V, ±0.1% accuracy
- 1000V CAT III (/52): 577V / 1000V, ±0.1% accuracy, >5 MΩ impedance
- Overload: 1,100V (Δ) continuous, 2,637V (1s)
Current Inputs
- 3 phases
- Models:
- 1A (/12, /22, /52): 0.0025–5A, ±0.1% accuracy, 10 mVA burden
- 5A (/32, /42): 0.013–25A, ±0.1% accuracy, 250 mVA burden
- Overload: 7A (1A models), 20A (5A models), 100A (1s)
Frequency
- Range: 10–75 Hz
- Accuracy: ±1 mHz
- Update interval: T/12
Protection
- Functions: Overcurrent (ANSI 50/51), directional overcurrent (67), voltage/frequency (27/59/81), harmonics (THD/TDD)
- Relays: 2x Form C, 5A / 230V AC or 48V DC
- Delay: 8ms ON / 4ms OFF
Data & Communication
- Sampling: 10 kHz (100 µs interval), 16-bit resolution
- Harmonics: IEC 61000-4-7, 200ms update
- Protocols: IEC 61850, DNP3, Modbus via M200 CPU
Environmental
- Operating temperature: -30 °C to +60 °C (optional +70 °C)
- Relative humidity: 5 % to 95 % RH noncondensing
- Safety: CAT III / IV, IP20
- Standards: IEC 61010-1 / 2-030
- Dimensions: 110 × 119 × 68.5 mm
- Weight: 495 g
Bachmann|GMP232|Power Measurement Protection Module


Bachmann|GMP232|Power Measurement Protection Module
Bachmann GMP232 Overview
The Bachmann GMP232 is a high-precision power measurement and protection module designed for real-time monitoring and control in three-phase electrical systems.
Features
- Measures voltage, current, frequency, power, harmonics up to 50th order
- Direct relay outputs for circuit breaker control
- Event logging and disturbance recording (COMTRADE)
- IEEE 1588 time synchronization
- Configurable protection functions per ANSI/IEC standards
Technical Specifications
Measurement
Voltage Inputs
- 3 phases + neutral
- Models:
- 120V CAT IV (/12, /32): 70V (Y) / 120V (Δ), ±0.1% accuracy, >3.2 MΩ impedance
- 690V CAT III (/22, /42): 400V / 690V, ±0.1% accuracy
- 1000V CAT III (/52): 577V / 1000V, ±0.1% accuracy, >5 MΩ impedance
- Overload: 1,100V (Δ) continuous, 2,637V (1s)
Current Inputs
- 3 phases
- Models:
- 1A (/12, /22, /52): 0.0025–5A, ±0.1% accuracy, 10 mVA burden
- 5A (/32, /42): 0.013–25A, ±0.1% accuracy, 250 mVA burden
- Overload: 7A (1A models), 20A (5A models), 100A (1s)
Frequency
- Range: 10–75 Hz
- Accuracy: ±1 mHz
- Update interval: T/12
Protection
- Functions: Overcurrent (ANSI 50/51), directional overcurrent (67), voltage/frequency (27/59/81), harmonics (THD/TDD)
- Relays: 2x Form C, 5A / 230V AC or 48V DC
- Delay: 8ms ON / 4ms OFF
Data & Communication
- Sampling: 10 kHz (100 µs interval), 16-bit resolution
- Harmonics: IEC 61000-4-7, 200ms update
- Protocols: IEC 61850, DNP3, Modbus via M200 CPU
Environmental
- Operating temperature: -30 °C to +60 °C (optional +70 °C)
- Relative humidity: 5 % to 95 % RH noncondensing
- Safety: CAT III / IV, IP20
- Standards: IEC 61010-1 / 2-030
- Dimensions: 110 × 119 × 68.5 mm
- Weight: 495 g