REJ603

Product Overview

REJ603 is an ABB self-powered feeder protection relay designed for distribution networks, providing reliable current-based protection without auxiliary power supply.

Identification

• Product ID: REJ603

• Type: Self-powered feeder protection relay

• Application: Feeder protection in distribution systems

• Form factor: Compact relay unit

Dimensions

• Width: 96 mm

• Height: 192 mm

• Depth: 128 mm

• Weight without HMI: 1.1 kg

• Weight with HMI: 1.2 kg

Energizing Inputs

• Rated frequency: 50/60 Hz

• Phase inputs nominal primary current: Configurable via CT type

• CT type reference current range:

  • REJ603 CT14: 5–25 A

  • REJ603 CT15: 10–80 A

  • REJ603 CT16: 20–125 A

  • REJ603 CT17: 40–250 A

  • REJ603 CT18: 100–400 A

Thermal Withstand Capability

• Continuous: 1.2 × Imax

• For 1 s: 25 kA primary current

• For 3 s: 15 kA primary current

Dynamic Current Withstand

• Half-wave: 37.5 kA primary current

Earth Input

• Rated current In: 5 A

• Thermal withstand continuous: 17 A

• For 1 s: 100 A

• Dynamic withstand half-wave: 250 A

Input Impedance

• Value: 0.03 Ω

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