ABB REF610C11LCLR Medium-Voltage Feeder Protection Relay

• Current Input: High-precision current detection capability with four current inputs (4 × 1/5 A CT) and three voltage inputs (3 × 63/110 V VT).
• Measurement Accuracy: ±0.5% for current and voltage measurements, ±2% for thermal overload measurements.
• Communication Interfaces: Equipped with multiple communication protocols including IEC 61850-8-1, Modbus TCP/RTU, DNP3, and GOOSE, enabling seamless integration into substation automation systems.
• Power Supply: Operates on 24/48/110 VDC (±20%), with a typical power consumption of 5 W.
• Display: Large graphical LCD for local monitoring and configuration, with the option to separate the display from the main unit for flexible installation.
• Environmental Tolerance: Designed to operate reliably in harsh industrial environments with a wide temperature range (-25°C to +70°C) and high resistance to vibration and electromagnetic interference.

Functional Characteristics

• Comprehensive Protection Functions:
  • Three-phase overcurrent protection (50/51) with definite time or IDMT characteristics.
  • Non-directional earth fault protection (50N/51N) with adjustable settings.
  • Thermal overload protection (49) for motors and feeders.
  • Undervoltage and overvoltage protection (27/59).
  • Phase imbalance protection (46).
  • Breaker failure protection (50BF).
• Advanced Control Features:
  • Local and remote control of circuit breakers and isolators, with synchronous checking for parallel operation.
  • Auto-reclosing functionality for automatic clearance of temporary faults on overhead lines.
  • Supports up to three auto-reclosing attempts.
• Precise Measurement Capabilities:
  • Measures phase currents, line and phase voltages, zero-sequence currents and voltages, frequency, power factor, active and reactive power, and energy consumption.
• Extensive Monitoring Functions:
  • Monitors breaker status, trip circuit status, and fuse health.
  • Performs internal self-tests to detect and report any device malfunctions.
  • Logs events and faults for post-analysis and fault diagnosis.
• Event Recording and Analysis:
  • Equipped with an event recorder capable of capturing 80 seconds of waveform data, triggered by internal or digital input signals.
  • Records four analog channels and up to eight user-selectable digital channels, with adjustable sampling rates.
• Programmable Logic Control (PLC):
  • Offers extensive PLC capabilities for integrating automation and sequential logic control functions.
  • Supports custom logic programming to meet specific application requirements.

Application Scenarios

• Feeder Protection:
  • Used in medium-voltage feeder circuits for protection against overcurrent, earth faults, and other abnormal conditions.
  • Suitable for distribution switchgear in single-bus, double-bus, and double-switch configurations.
• Motor Protection:
  • Protects medium-sized three-phase asynchronous motors from overcurrent, thermal overload, and other faults.
  • Ensures safe and reliable operation of motors in industrial applications.
• Transformer Protection:
  • Provides backup protection for transformers in industrial and utility applications.
• Substation Automation:
  • Integral part of substation automation systems for utilities, facilitating seamless communication and coordination between different components.
  • Supports various communication protocols for integration into ABB or third-party automation systems.
• Industrial Automation:
  • Applied in manufacturing, petrochemical, and metallurgical industries where reliable power distribution and motor control are critical.
  • Enhances system reliability and reduces downtime through comprehensive protection and monitoring functions.
• Renewable Energy Integration:
  • Supports the integration of renewable energy sources (e.g., wind, solar) into the grid.
  • Ensures stable operation and protection of distributed generation assets.