ABB REJ603BBB10NN3XC Feeder Protection

Product Overview

The ABB REJ603BBB10NN3XC is an advanced self-powered feeder protection relay within the Relion® 600 family, specifically engineered for medium-voltage secondary distribution networks. Its most significant advantage is the ability to derive all necessary operating power directly from the current transformer (CT) secondary circuits. 

Technical Specifications

• Manufacturer: ABB

• Series: Relion 600

• Model Number: REJ603BBB10NN3XC

• Power Supply: Self-powered via CT input (minimum startup ~2.5 VA)

• Protection Functions:

• Phase Overcurrent

• Earth Fault

• Undervoltage / Overvoltage

• Rated Current (In): 1 A / 5 A (Selectable)

• Frequency: 50 / 60 Hz

• Trip Output: 1 Normally Open (NO) impulse output

• Binary I/O: 1 Configurable Digital Input / 1 Digital Output

• Fault Recording: Internal memory for up to 100 fault events

• Enclosure Rating: IP54 Front / IP20 Rear

• Dimensions: 160 mm (H) x 96 mm (W) x 150 mm (D)

• Weight: 0.9 kg

Key Features & Engineering Benefits

• Autonomous Operation: The self-powered design ensures that the protection logic is always active as long as there is load current, providing a failsafe solution for unstaffed or remote locations.

• Rugged Reliability: Built with flame-retardant materials and an IP54-rated front panel, this unit is designed to withstand the harsh environments often found in outdoor distribution cabinets.

• Diagnostic Capabilities: Despite its compact and autonomous nature, it records up to 100 events, allowing maintenance teams to perform detailed diagnostic analysis after a trip.

• Simplified Configuration: The use of DIP switches allows for immediate manual configuration and visual verification of settings, reducing the complexity of commissioning in the field.