Product Overview

The Bachmann GM260 functions as a high-speed, precision acquisition unit for three-phase electrical networks within the M1 automation environment. It enables the simultaneous monitoring of two separate three-phase branches from a single voltage reference point, calculating True RMS values online. This module performs advanced harmonic analysis up to the 40th harmonic, providing essential data for power quality assessment in wind turbines, hydroelectric plants, and industrial microgrids. We supply this unit in 100% Brand New condition, ensuring laboratory-grade measurement accuracy for your critical power generation assets.

Technical Specifications

The GM260 integrates 16-bit A/D conversion with high-speed digital signal processing to evaluate complex grid variables in real-time.

Engineering Advantages

The GM260 architecture replaces multiple standalone power meters and protection relays by integrating all grid-monitoring functions into the PLC backplane.

• Advanced Harmonic Analysis: Unlike standard analog cards, the GM260 calculates harmonics up to the 40th order online. This allows engineers to detect non-linear load interference and prevent premature equipment failure caused by total harmonic distortion (THD) in industrial plants.

• Dual 4-Quadrant Energy Counting: The module integrates two separate 4-quadrant counters, measuring active, reactive, and apparent power in both consumption and generation directions. This proves vital for renewable energy systems that fluctuate between grid-tie feeding and local consumption.

• Synchronous Machine Protection: Integrated algorithms detect phase imbalances and frequency shifts instantaneously. These features allow the GM260 to act as a high-speed protection interface, triggering safety shutdowns or load shedding faster than traditional external relays.

• Galvanic High-Voltage Isolation: Direct 690 V AC inputs utilize high-grade galvanic isolation to protect the M1 system bus. This design eliminates the need for external voltage transducers for standard 690V industrial grids, saving cabinet space and reducing wiring errors.

• Deterministic Grid Synchronization: The module supports generator-to-grid synchronization by providing precise phase-angle and frequency data to the CPU. This enables smooth paralleling of generators in marine dynamic positioning or decentralized power systems.

FAQs

• Can I monitor two different generators with one GM260?

  The GM260 monitors two separate current branches but shares a common voltage monitoring point. If your generators share a common busbar voltage, you can acquire the current data for both simultaneously.

• Does the module require external Current Transformers (CTs)?

  Yes. The current inputs utilize standard 1 A or 5 A secondary signals from external CTs. You must configure the CT ratio within the Bachmann software to ensure accurate scaling of the primary current values.

• How does the module handle high-frequency transients?

  The 16-bit A/D conversion and 1 kHz frequency range capture rapid fluctuations. However, for lightning-strike level transients, you should still install standard external surge protection devices (SPDs) upstream of the voltage inputs.

• Is the GM260 compatible with IEC 61850?

  When paired with an appropriate Bachmann communication processor (like an MPC series CPU), the data acquired by the GM260 can be mapped to IEC 61850 data objects for substation automation and smart grid integration.