Description

REX521BBHGLB01C is a microprocessor-based protection relay developed by ABB based on the RED500 platform. It is a simplified version of the REF54-type feeder terminal, integrating protection, control, measurement, monitoring, and communication functions. It is mainly intended for medium-voltage power networks and industrial distribution scenarios. Below is detailed product information:

Product Type: Medium-voltage feeder and motor protection relay (microcomputer terminal)

Core Uses: Suitable for protection, control, measurement, and monitoring of medium-voltage power networks, and can also protect medium to large three-phase AC motors controlled by circuit breakers.

Typical Applications: 1. Power Substations: Feeder protection for incoming and outgoing lines and backup protection for substations; 2. Industrial Distribution: Distribution network protection for industries such as metallurgy, petrochemicals, and cement; 3. Special Scenarios: Transformer backup protection, high-voltage line relay backup protection; 4. Compatible Networks: Radiation-type neutral isolation, resonant grounding, direct grounding, and resistance grounding systems, supporting single-bus architecture, single-end/multi-end power supply lines, and ring networks.

Product Advantages

1. Strong Compatibility: Adaptable to various grounding systems and power architectures, supporting flexible deployment in multiple scenarios;

2. Reliable Protection: Industrial-grade EMC design with lightning, overcurrent, and surge protection, suitable for complex electromagnetic environments;

3. Convenient Operation: Multilingual human-machine interface, clear alarm messages, and timestamped event logs, supporting both panel LCD and backend software configuration;

4. Efficient Communication: Supports multiple industrial protocols, enabling device interoperability without additional protocol converters.