PCD231B 3BHE025541R0101 | Generator Protection Relay

Key Features and Advantages

Comprehensive Generator Protection: The PCD231B provides complete protection for generators up to 100 MVA, including advanced differential protection with harmonic restraint to prevent maloperation during transformer energization.

Adaptive Protection Logic: Programmable logic functions enable customized protection schemes that adapt to different operating modes, including synchronization check and automatic transfer schemes.

High-Speed Operation: With a protection operation time of less than 15ms for critical faults, the PCD231B minimizes equipment damage and prevents catastrophic failures in power generation systems.

Advanced Metering Capabilities: Integrated power quality monitoring includes harmonic analysis up to the 31st order, voltage/current unbalance measurement, and energy metering with Class 0.5 accuracy.

Cybersecurity Protection: Hardware-based security module with secure boot and encrypted communications meets IEC 62351 standards for protection against cyber threats in critical infrastructure.

PCD231B101-3BHE025541R0101

Application Fields

The PCD231B is designed for critical generator protection in diverse power generation environments. In thermal power plants, it safeguards steam and gas turbines against internal faults and abnormal operating conditions. Hydroelectric facilities utilize this relay for protection of water turbine generators against stator and rotor faults.

Industrial applications include protection of backup generators in data centers, hospitals, and manufacturing facilities. Renewable energy installations deploy the PCD231B for protection of synchronous condensers in solar farms and biogas generation facilities. Its SIL 2 certification ensures compliance with safety requirements in nuclear power plant backup systems.

Related Products

PCD232B: Enhanced version with motor protection capabilities
REF615: Feeder protection relay
RET615: Transformer protection relay
REC615: Motor protection relay
COM600: Substation communication gateway
CMC256: Test equipment for relay commissioning
SMT100: Time synchronization module

Installation and Maintenance

Installation Preparation: Before installing the PCD231B, verify CT and VT ratios match relay settings. Ensure proper grounding according to ABB guidelines to prevent measurement errors. Maintain minimum 50mm clearance around the relay for ventilation and heat dissipation.

Maintenance Recommendations: Perform functional tests annually using secondary injection test sets. Verify settings after any system modification. Monitor relay self-diagnostics through PCM600 software. Clean ventilation openings annually using low-pressure air. For firmware updates, follow ABB technical bulletins and use the CMC256 test set for verification.