Control

REX640 integrates functionality for controlling objects such as

circuit breakers, disconnectors, earthing switches, on-load tap

changers and Petersen coils via the LHMI or by means of

remote controls. The relay includes three circuit breaker control

blocks. In addition, the relay features 14 disconnector control

blocks intended for the motor-operated control of

disconnectors or a circuit breaker truck and three control

blocks intended for the motor-operated control of the earthing

switch. Furthermore, the relay includes eight additional

disconnector position indication blocks and three earthing

switch position indication blocks that can be used with

disconnectors and earthing switches that are only manually

controlled.

The touch screen LHMI supports a single-line diagram with

control points and position indication for the relevant primary

devices. Interlocking schemes required by the application are

configured using Signal Matrix or Application Configuration in

PCM600.