Overview

The Bachmann GM260 Grid Measurement Module is designed for precise current and voltage measurements in grid applications, offering true RMS measurement capabilities, including harmonics.

Technical Specifications

Current Measurement

• Number of Inputs: 6
• Accuracy: ≤ ±0.3%
• Current Transformer Rated Current: 1 Arms
• Measuring Range: 0.01 to 1.2 Arms
• Continuous Overload: 1.2 Arms
• Short-Term Overload (5x1 s, 300 s interval): 20 Arms
• Apparent Ohmic Resistance: 75 mVA

Voltage Measurement

• Number of Inputs: 3
• Maximum Rated Voltage:
  • UL-L, RMS: 480 Vrms
  • UL-N, RMS: 277 Vrms
• Voltage Measuring Range:
  • UL-L, RMS: 70 to 625 Vrms
  • UL-N, RMS: 36 to 361 Vrms
• Accuracy: ≤ ±0.1%
• Continuous Overload:
  • UL-L, RMS: 680 Vrms
  • UL-N, RMS: 390 Vrms
• Short-Term Overload (10x1 s, 10 s interval):
  • UL-L, RMS: 1039 Vrms
  • UL-N, RMS: 600 Vrms
• Input Impedance: > 2 MΩ

Frequency Measurement

• Rated Frequency: 50 / 60 Hz
• Reference Range: 45 to 65 Hz
• Accuracy: ≤ ±0.010 Hz (with averaging filtering down to ≤ ±0.005 Hz)
• Measurement Interval:
  • 50 Hz: 20 ms
  • 60 Hz: 16.67 ms

Power Measurement

• Measured Values: Active (P), Reactive (Q), Apparent (S) power per phase and total
• Accuracy: ≤ ±0.4%
• Calculation Method: DIN 40110-2
• Measurement Interval:
  • 50 Hz: 20 ms
  • 60 Hz: 16.67 ms