Sweden
This device is a Generator Protection Relay, part of ABB's renowned Relion 650 series. It is specifically designed for the comprehensive protection, control, measurement, and supervision of generators and generator-transformer units in utility, industrial, and commercial power systems.
Standards: IEC 60255-1, IEC 60255-27, IEC 61850, IEC 60255-121 (for overcurrent), IEEE C37.90, IEEE C37.94
Certifications: UL, CE, DNV GL, Lloyds
Rated Voltage (Uₙ): Common options include 24-48 V DC, 48-125 V DC, 110-250 V DC/AC. The exact value is typically specified when ordering.
Power Consumption: Typically around 15-50 W (depending on configuration and connected I/O).
The relay is highly configurable. The base unit includes a standard set, with expansion options available.
Analog Inputs:
Current (Iₙ): 1 A or 5 A (configurable).
Phases: 3 phase currents (I_a, I_b, I_c) and one ground current (I_n).
Voltage (Uₙ): 100 V, 110 V, or 120 V (configurable).
Phases: 3 phase voltages (U_a, U_b, U_c) and one auxiliary voltage input (U_aux) for synchronism check.
Binary (Digital) Inputs: Typically ≥ 16 programmable inputs for status signals (e.g., breaker position, external alarms).
Binary (Relay) Outputs: Typically ≥ 10 programmable outputs (Form-A contacts) for tripping, alarm, and control commands.
This is the core strength of the PCD231B101. It includes a comprehensive suite of protection features:
Differential Protection (87G): Primary protection for stator winding phase-to-phase faults.
Stator Earth Fault Protection (64G1, 64G2): For high and low impedance grounding, using neutral voltage displacement or injection-based methods (e.g., 3rd harmonic, 20Hz/12.5Hz).
Backup Impedance Protection (21): For phase faults.
Overcurrent Protection (50/51, 50N/51N): Instantaneous and time-delayed for phase and ground.
Overvoltage (59) & Undervoltage (27) Protection
Overfrequency (81O) & Underfrequency (81U) Protection
Reverse Power Protection (32): For motoring protection.
Loss of Excitation / Under-Excitation (40):
Out-of-Step / Pole Slipping Protection (78):
Voltage Balance Protection (60): For negative sequence / unbalance protection.
Thermal Overload Protection (49): For stator overload protection.
Breaker Failure Protection (50BF):
Automatic Voltage Regulator (AVR) Control: For controlling the excitation system.
Synchronizing Function (25): Automatic synchronizer for generator connection to the busbar.
Multi-shot Auto-Reclosing: Programmable logic for reclosing.
Programmable Logic (CFC): Configurable Function Charts for custom logic without additional software.
Sequence of Events Recorder (SER): High-resolution (1 ms) logging of events.
Disturbance Recorder (DR): Records currents, voltages, and binary signals for fault analysis.
Values Measured: Three-phase currents & voltages, active power (P), reactive power (Q), apparent power (S), power factor (cos φ), frequency (f), energy (Wh, VAh).
Accuracy: Typically Class 0.5 for current and voltage, Class 1 for power, as per IEC 60255-1.
Front Port: RJ45 Ethernet and optical USB for local communication and configuration.
Rear Communication: Multiple slots for communication modules.
Supported Protocols:
IEC 61850 (Edition 1 & 2, including GOOSE and MMS)
IEC 60870-5-103 & IEC 60870-5-104
Modbus RTU & Modbus TCP/IP
DNP3.0 (Level 2 and 3, over TCP/IP and serial)
PROFIBUS DP
Housing: Designed for 19" rack mounting or panel mounting.
Dimensions: Approximately 177mm (H) x 177mm (W) x 215mm (D) (for a typical 4U case).
Weight: Approximately 5-6 kg.
Operating Temperature: -40°C to +70°C (-40°F to +158°F).
Storage Temperature: -40°C to +85°C.
Ingress Protection (IP): IP54 (front panel) when installed correctly.
Software: PCM600 is ABB's dedicated engineering tool for configuring, setting, and monitoring all Relion 600 series protection and control IEDs.
Application: Complete protection for generators of all sizes.
Key Protection: Includes critical functions like Differential (87G) and Stator Earth Fault (64G).
Control: Built-in AVR control and Synchronizing (25) function.
Communication: Native support for IEC 61850, making it ideal for modern digital substations.
Flexibility: Highly configurable I/O and extensive programmable logic (CFC).
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