PLCs, Power Supplies & Others

High-Precision Monitoring for Three-Phase Networks

The Bachmann GM260 is a reliable grid measurement module designed for accurate monitoring of three-phase electrical networks. It measures voltage, current, frequency, power factor, and phase angles across two separate three-phase branches. This capability makes it ideal for industrial automation, PLC, and DCS control systems, as well as energy monitoring in factories and critical facilities.

Advanced Measurement Features

The GM260 supports True RMS calculations, capturing harmonics up to the 40th order. In addition, it includes two independent four-quadrant energy counters for precise energy tracking. Its compact design allows easy integration into dual three-phase systems, enhancing operational efficiency and reducing wiring complexity.

Key Technical Specifications

• Voltage Measurement: 3 channels, 70–625 Vrms, ±0.1% accuracy
• Current Measurement: 6 channels, 0.01–1.2 Arms, ±0.3% accuracy
• Frequency Measurement: 45–65 Hz, ≤ ±0.010 Hz accuracy
• Power Measurement: Active (P), reactive (Q), and apparent (S) power per phase, ±0.4% accuracy
• Energy Counters: 2 counters, 1 Wh resolution, ≤ ±0.4% accuracy
• Dimensions: 55 × 119 × 66 mm
• Weight: 190 g

These specifications ensure reliable performance in control systems and factory automation applications that demand precise electrical measurements.

Compliance and Environmental Robustness

The GM260 meets IEC/EN 61131-2 and IEC/EN 60664-1 safety standards, with Protection Class 2. It operates in temperatures from -30 to +60 °C and tolerates up to 95% non-condensing humidity. This robustness allows deployment in harsh industrial environments and ensures long-term reliability.

Author’s Insight

In industrial settings, accurate grid measurement is essential for both operational efficiency and safety. The GM260’s dual-branch monitoring enables engineers to quickly detect imbalances, harmonic distortion, or phase irregularities. In my experience, modules like this significantly reduce downtime and improve energy management in PLC-controlled automation systems.

Application Scenarios

1. Energy Monitoring: Track energy consumption in factories and commercial facilities.
2. Machine Control: Monitor electrical parameters for large automated machinery.
3. Power Quality Analysis: Detect harmonics and phase imbalances to protect sensitive equipment.
4. Renewable Integration: Monitor grid parameters in solar or wind energy systems.
5. Industrial Automation: Integrate with DCS and PLC systems for precise control feedback.

Details