About ABB REL511 RELAY

ABB REL511 RELAY

GeneralThe REL511 line distance protection termi- nal is one of the basic units for distribution and sub-transmission line distance protection applications and forms a part of a PAN- ORAMA Station Automation.

Comprehensive Protection Features

The ABB REL511 relay provides multi-layered protection with distance protection, overcurrent protection, and auto-reclose functions. It offers precise three-phase selective operation, trip circuit supervision, and records up to 100 events. Enhanced relay settings and programmable outputs ensure the relay can adapt to changing protection needs in a power system environment.


Easy Integration and Monitoring

Designed for seamless integration, the REL511 communicates on industry-standard protocols such as IEC 60870-5-103 and MODBUS. Its standard 19-inch rack mounting and rear screw clamp terminals make installation straightforward for system engineers. Real-time monitoring is simplified through LCD display as well as remote access for configuration and diagnostics.


Reliable and Secure Operation

Engineered for reliability, the REL511 features natural air cooling, high insulation resistance (>100 M at 500 VDC), and dielectric strength up to 2 kV. Multi-level password protection secures settings, while SPDT silver alloy contacts ensure long mechanical life (10 million operations) and handle substantial loads, making it ideal for demanding utility and industrial environments.