REJ603BB401NN31E | ABB Feeder Protection Relay for Medium Voltage

ABB REJ603BB401NN31E Feeder Protection Relay

The ABB REJ603BB401NN31E is part of ABB’s Relion® 605 series of feeder protection relays. Specifically designed for medium-voltage distribution networks, this relay ensures reliable protection for secondary distribution feeders where auxiliary power may not always be available. Powered directly by current transformers (CTs), it offers continuous protection even in remote or backup installations, providing essential overcurrent and earth-fault protection.

Technical Specifications:

• Model Number: REJ603BB401NN31E

• Series: ABB Relion® 605

• Type: Self-powered Feeder Protection Relay

• System Compatibility: Medium-voltage distribution feeders

• Power Supply: Self-powered via CTs (Current Transformers)

• Protection Functions: Overcurrent, Earth-fault

• Inputs/Outputs: CT inputs, trip outputs, LED/flag indicators

• Optional Interface: HMI (local monitoring and control)

• Dimensions (H × W × D): ~160 × 151 × 130 mm

• Weight: 1.43 kg

• Operating Temperature: –40°C to +55°C

• Storage Temperature: –40°C to +85°C

• Certifications: IEC 60255, EN 61010, CE

• Application Areas: Medium-voltage distribution networks, substations, feeder protection

FAQ:

1. What is the ABB REJ603BB401NN31E used for?
The REJ603BB401NN31E is a feeder protection relay designed to protect medium-voltage distribution feeders. It provides overcurrent and earth-fault protection.

2. Does the ABB REJ603BB401NN31E require an external power supply?
No, the REJ603BB401NN31E is self-powered from current transformers (CTs), eliminating the need for an external auxiliary power supply.

3. What is the purpose of the optional HMI in the ABB REJ603BB401NN31E?
The optional HMI allows for local monitoring and control of the relay, making it easier to manage and troubleshoot protection functions on-site.

4. What kind of protection does the ABB REJ603BB401NN31E offer?
This relay offers protection against overcurrent and earth-fault conditions, ensuring reliable feeder protection in secondary distribution networks.

5. In which industries is the ABB REJ603BB401NN31E used?
The REJ603BB401NN31E is commonly used in medium-voltage distribution networks, substations, and applications requiring feeder protection.