REJ603 REJ603BBB10NN3XB

Overview

The REJ603 is a self-powered feeder protection relay for short-circuit and earth-fault protection in secondary distribution networks and small transformers. Ideal for remote locations, it operates without auxiliary power.

Key Benefits

• Low-Energy Trip Coils: Efficient operation in low-power environments

• USB-Powered: Access fault data via USB, even without CT power

• Quick Commissioning: Selective test function for protection and binary outputs

• Fault Analysis: Event logs and disturbance records (3.0 variant)

• Self-Supervision: Extensive monitoring of relay hardware and software

Protection Features

• Versatile Protection: Overcurrent, earth-fault, thermal overload, and inrush detection

• Remote Trip: Enables remote tripping and measurements

• Bi-Stable Outputs: Low-energy trip for circuit breakers

Application & Compatibility

• Applications: Used in RMUs and compact switchgear

• Network Types: For solidly earthed, resistance-earthed, or isolated networks

Data Accessibility

• Event Logs: Download records via USB

• USB Powering: Functions without current input or auxiliary power

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