REJ601 Numerical Relay ABB Feeder Protection


Technical Parameters
◆ Integrated design of data acquisition and transmission.
◆ Micro-power consumption design, support battery, solar energy, utility power supply.
◆ IP68 protection level, waterproof, moisture-proof, anti-soaking.
◆ Supports two working modes: wake-up timer and real-time online.
◆ Provide 5V and 12V DC power supply for the transmitter.

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REJ601 Numerical Relay ABB Feeder Protection


Entry-level numerical relay for distribution networks ABB REJ601 Numerical relay is a dedicated feeder protection relay intended for the protection of utility and industrial power systems in primary and secondary distribution networks. The relay provides an optimized composition of protection and monitoring functionality in one unit, with the best performance and usability in its class.

Besides the conventional current transformer interface based variant, the relay also supports a variant based on Rogowski current sensors analog interface. This helps to obtain a compact medium voltage switchgear equipment size reduction with improved performance and standardization.


Main protection for overhead lines and cable feeders in solidly earthed, resistance-earthed or isolated networks
Inrush current stabilization function for distribution transformers

Product benefits

  • Compact, flexible and simple to handle
  • Speedy commissioning through selective test function for protection functions, binary signals and communication features
  • Easily configurable binary inputs and outputs
  • Extensive self-supervision of the relay hardware and software
  • Enhanced safety with usage of sensors variant / detachable terminals with CT shorting facility
  • Press fit mounting arrangement facilitates easy and fast installation