ABB REF541 Feeder Terminal

• Analog Inputs: 12 channels for voltage and current inputs from the primary circuit, with 2 additional virtual channels for calculating zero-sequence current and residual voltage.
• Switch Inputs: Voltage-controlled and optically isolated, with configurable signal states.
• Switch Outputs: Includes multiple relay outputs for control purposes.
• Communication Interfaces: Supports various protocols including SPA, LON, IEC 60870-5-103, and can be adapted for IEC 61850, Profibus DPV1, DNP 3.0, and Modbus.
• Display: Large graphical LCD that can be separated from the device for flexible installation in switchgear.
• Environmental Tolerance: Designed to operate reliably in harsh industrial environments.

Functional Characteristics

• Protection Functions: Includes phase overcurrent protection (with or without direction), earth fault protection, zero-sequence overvoltage protection, overvoltage and undervoltage protection, thermal overload protection, breaker failure protection, and auto-reclosing.
• Control Functions: Enables local and remote control of circuit breakers and isolators, with synchronous checking and control object status display.
• Measurement Functions: Measures phase currents, line and phase voltages, zero-sequence currents and voltages, frequency, power factor, active and reactive power, and energy.
• Monitoring Functions: Monitors breaker status, trip circuit status, and performs internal self-tests.
• Programmable Logic Control (PLC): Offers extensive PLC capabilities, allowing for the integration of various automation and sequential logic control functions within a single device.
• Fault Recording: Equipped with a fault recorder capable of capturing 16 current or voltage waveforms and 16 logic switch signals, with adjustable recording length based on the number of analog inputs.

Application Scenarios

• Power Distribution Systems: Used in medium-voltage power distribution networks for protection, control, measurement, and monitoring tasks.
• Industrial Automation: Applied in industrial settings where reliable and efficient control of electrical equipment is crucial, such as in manufacturing, petrochemical, and metallurgical industries.
• Motor Protection: Protects medium-sized three-phase asynchronous motors from various fault conditions, ensuring safe and stable operation.
• Capacitor Bank Control: Controls and protects reactive power compensation shunt capacitor banks, enhancing power quality and system efficiency.
• Substation Automation: Integral part of substation automation systems, facilitating seamless communication and coordination between different components.