ABB REX 521 Motor Protection Relay
Description
ABB REX 521 Motor Protection Relay is a versatile, intelligent digital protection relay designed for motor and power system monitoring, control, and protection across industrial and infrastructure applications.
| Specification | Value |
|---|---|
| Current Protection Range | 100 – 400A |
| Supported Communication Protocols | Modbus RTU/TCP, IEC 61850 |
| Operating Temperature Range (Typical) | -25 to 70 degrees Celsius |
| Protection Grade (Select Models) | IP67 |
| Program Capacity (Select Models) | 16MB |
Key Features:
- Multi-dimensional protection including overcurrent, overvoltage, undervoltage, earth fault, and thermal overload monitoring via built-in thermal model algorithm
- Fault type and location indication with real-time fault code display on LCD HMI interface, plus password-protected settings for operational safety
- Optically isolated serial communication ports for cascading expansion, compatible with multiple current/voltage sensors for high-precision data collection
- Multi-language interface support and navigation button-controlled LCD with multi-view display for real-time data, event logs, and settings
Applications:
- Industrial automation production lines such as automotive manufacturing stamping lines
- Energy infrastructure including wind farm booster stations, power plants, and substations
- Building automation systems and general industrial motor protection for pumps, fans, and compressors
Related Models:
- REX521 GHHPSH50G
- REX521GHHPSH07G
- REX521GHHGSH51G