Technical Description - ABB REJ 527 Operator's Manual

1MRS 751055-MUM
4.
Directional or Non-Directional Earth-Fault Relay
Operator's Manual

Technical Description

REJ 527 is designed to be used as a stand-alone protection relay in medium voltage
distribution systems where the relay can be applied as the main or backup protection
relay of an object. The whole function software used in the relay is preloaded into
program memory in production stage.
Function and features of the relay are explained in detail in "Technical Reference
Manual".
REJ 527
25