DS200PLIBG1A GE

Key Technical Parameters

Advantages & Core Features

• Direct breaker monitoring and control – The DS200PLIBG1A provides the Mark V system with real-time status of circuit breakers, disconnect switches, and grounding switches, enabling the turbine controller to execute safe start-up, shutdown, and fault isolation sequences.

• Selectable input voltage – Inputs are jumper-selectable for 24 VDC or 125 VDC, providing flexibility to interface with different plant control voltages without external signal converters.

• Galvanic isolation – 2,500 VAC isolation protects the Mark V backplane and processor from voltage spikes and ground loops in the switchyard, ensuring reliable operation in high-noise environments.

• Programmable debounce filtering – Adjustable input filtering (5-50 ms) prevents false status changes from contact bounce or transient noise, ensuring stable breaker status reporting.

• Dry contact relay outputs – Four form C relays provide robust breaker trip/close commands, rated for 5A @ 250 VAC / 30 VDC – suitable for direct control of medium-voltage switchgear.

• Status LEDs – 12 LEDs (8 inputs + 4 outputs) provide immediate visual indication of all I/O status, simplifying troubleshooting during commissioning and maintenance.

• Compact 1-slot form factor – Fits in any standard Mark V slot without requiring adjacent empty space.

Application Cases

• Generator breaker control – A 300 MW combined-cycle plant uses the DS200PLIBG1A to monitor the generator output breaker position and execute automatic synchronization and trip sequences. The board’s 5A relay outputs directly interface with the medium-voltage switchgear trip coils.

• Emergency shutdown interface – A nuclear facility uses the board to monitor tie breakers and initiate emergency turbine trips when switchgear faults are detected.

• Transformer protection – A hydroelectric plant monitors the main step-up transformer breaker position, enabling automatic shutdown on transformer faults.

• Load shedding and islanding – An industrial facility with co-generation uses the DS200PLIBG1A to monitor utility tie breakers and execute load shedding commands during grid disturbances.

Comparison with Related Variants

Selection Suggestions

1. Confirm breaker interface requirements – Select the DS200PLIBG1A if your Mark V system needs to monitor and control medium-voltage breakers, disconnect switches, or grounding switches.

2. Verify input voltage – Select the appropriate jumper setting for 24 VDC or 125 VDC based on your plant’s switchgear auxiliary supply.

3. Count required I/O – Ensure the 8 inputs and 4 outputs are sufficient for your application. If more I/O is required, consider adding additional DS200PLIBG1A boards.

4. Confirm relay rating – Ensure the 5A @ 250 VAC rating is sufficient for your trip/close coils. For larger coils, external interposing relays may be required.

5. Check slot availability – Standard 1-slot Mark V position.

6. Procurement – Purchase from reputable suppliers offering functional testing (all inputs/outputs verified, isolation tested). Lead times: 6-10 weeks.

Important Precautions

• Power down completely – De-energize rack before installation. Hot-swapping not supported.

• ESD protection – Use wrist strap and anti-static mat.

• Field wiring – Ensure field wiring is properly terminated and routed away from high-voltage cables. Use shielded cables for inputs if running in noisy environments.

• Voltage selection – Verify jumper settings before applying field power. Incorrect voltage selection will damage the board.

• Debounce configuration – Set debounce time based on contact characteristics. Typical setting: 10 ms for auxiliary contacts, 30 ms for spring-loaded contacts.

• Relay contacts – Do not exceed 5A @ 250 VAC / 30 VDC ratings. For higher current loads, use interposing relays.

• Cleaning – Use compressed air only. No liquids.

• Storage – Store at 10-30°C, 20-50% RH.

Final Expert Recommendation

The DS200PLIBG1A is a specialized Mark V interface board that provides reliable monitoring and control of circuit breakers and switchgear. Its 2,500 VAC isolation, programmable debounce, and 5A relay outputs make it well-suited for direct interface with medium-voltage switchgear in power plant and industrial applications.

Select the DS200PLIBG1A when:

• You need to monitor breaker status and execute trip/close commands

• Your switchgear uses 24 VDC or 125 VDC auxiliary supplies

• You require galvanic isolation (2,500 VAC) between the switchyard and Mark V backplane

• You need programmable debounce filtering for stable status readings

For most applications, this board is the standard solution for Mark V breaker monitoring and control. There is no newer direct replacement with identical functionality; maintaining existing DS200PLIBG1A boards or sourcing replacements is necessary for Mark V systems.

When sourcing, ensure functional testing of all inputs and outputs is performed. With proper installation and configuration, the DS200PLIBG1A will provide years of reliable service as the critical interface between your turbine control system and the power distribution equipment.