Description

ABB PCD235B101 3BHE032025R0101 Generator Protection Relay

Product Overview

The ABB PCD235B101, with the order code 3BHE032025R0101, is a numerical generator protection relay belonging to ABB’s renowned Relion® 670 series. This specific model, PCD235B101, is part of the REG670 generator protection terminal family, which is designed to provide comprehensive, high-speed, and reliable protection for medium to large-sized synchronous generators in power plants and industrial facilities.

This device integrates multiple protection, control, measurement, and monitoring functions into a single, compact platform. It is engineered to safeguard the generator and the generator-transformer block against a wide range of electrical faults and abnormal operating conditions. The order code 3BHE032025R0101 uniquely defines this hardware and firmware configuration, which includes a specific set of pre-configured protection functions and communication options. It represents ABB’s cutting-edge technology for ensuring the stability and availability of critical power generation assets.

Technical Specifications

Parameter	Specification
Model / Order Code	PCD235B101 / 3BHE032025R0101
Manufacturer	ABB
Product Family	Relion® 670 Series (Specifically, a REG670 variant)
Device Type	Numerical Generator Protection Relay (IED – Intelligent Electronic Device)
Key Protection Functions	This specific `B101`configuration typically includes a comprehensive suite, such as: • Stator Differential Protection (87G) • Backup Impedance Protection (21) • Stator Earth Fault Protection (100% & 95%, 59N/27TN) • Negative Sequence / Unbalance Protection (46) • Overcurrent (51, 51V) • Over/Under Voltage (59/27) • Over/Under Frequency (81O/U) • Loss of Excitation (40) • Reverse Power (32) • Voltage Restrained Overcurrent (51V) • Field (Rotor) Earth Fault Protection (64F)
Measurement & Monitoring	• Three-phase currents & voltages, frequency, power (P, Q, S), power factor, energy. • Sequence components. • Extensive disturbance recording (DR) and event logging (SOE).
Inputs/Outputs	• Analog Inputs: For CTs (e.g., 1A/5A) and VTs. • Binary Inputs: For breaker status, trip signals from other relays, etc. • Relay Outputs: Multiple contacts for trip, alarm, and control.
Communication Protocols	• IEC 61850 (Edition 1 & 2, including GOOSE and Sampled Values for process bus). • IEC 60870-5-103 • Modbus RTU • DNP3.0 • Profibus DP (optional via module)
Human-Machine Interface	Large graphical LCD display with keypad for local operation, browsing measurements, event logs, and settings.
Power Supply	Typically wide-range DC or AC (e.g., 48-250V DC / 110-240V AC).
Case Type	19-inch rack-mounted or flush-mounted case (size depends on I/O configuration).

PCD235B1101 3BHE032025R1101

Main Features and Advantages

Comprehensive, All-in-One Protection: Integrates virtually all standard and advanced protection functions required for a generator into one device, reducing panel space, wiring complexity, and engineering time compared to using multiple single-function relays.
High-Speed & High-Accuracy: Utilizes powerful processing and advanced algorithms (e.g., saturation detection for differential protection) to provide fast, secure, and dependable fault clearance, minimizing damage to the expensive generator asset.
IEC 61850 Native Support: As a core Relion® 670 series device, it natively supports IEC 61850 for seamless integration into modern digital substations. This includes GOOSE for fast inter-relay communication and Sampled Values for connection to merging units, enabling a streamlined, fiber-optic based process bus architecture.
Advanced Monitoring & Diagnostics: Provides extensive metering, event recording with time synchronization (via IRIG-B or SNTP), and high-resolution fault recording. This data is crucial for post-event analysis, condition monitoring, and predictive maintenance.
Flexible Configuration: Engineered with ABB’s CAP 501/505 configuration tools within PCM600 software, allowing protection engineers to tailor logic, settings, and schemes to the specific generator’s characteristics and plant requirements.

Application Fields

The PCD235B101 / REG670 is deployed as the primary protection for synchronous generators in:

Thermal Power Plants: Coal, gas, and combined-cycle power plants.
Hydroelectric Power Plants: For both large and small hydro generators.
Industrial Power Generation: Captive power plants in industries like petrochemicals, metals, and pulp & paper.
Nuclear Power Plants (in safety-class and non-safety-class applications with appropriate qualifications).
Renewable Integration: For protection of generators in bioenergy plants.