ABB RELION REX640 Technical Manual page 1524

Hide thumbs Also See for RELION REX640:

Table of Contents

Control functions

If the cut-out time elapses

If the reclaim time elapses and the AR function is ready for a new sequence

If the AR function is in lockout or disabled, that is, if the value of the Protection

crd mode setting is "AR inoperative" or "AR inop, CB man".

The PROT_CRD output can also be controlled with the Protection crd mode setting.

The setting has the following modes:

"no condition": the PROT_CRD output is controlled only with the Protection crd

limit setting

"AR inoperative": the PROT_CRD output is active, if the AR function is disabled

or in the lockout state, or if the INHIBIT_RECL input is active

"CB close manual": the PROT_CRD output is active for the reclaim time if the

circuit breaker has been manually closed, that is, the AR function has not issued

a close command

"AR inop, CB man": both the modes "AR inoperative" and "CB close manual" are

"always": the PROT_CRD output is constantly active

GUID-82D13A61-B11B-4653-84EC-B5A89E223817 V1 EN

Configuration example of using the PROT_CRD output for protection

If the Protection crd limit setting has the value "1", the instantaneous three-phase

overcurrent protection function PHIPTOC is disabled or blocked after the first shot.

Circuit breaker controller

Circuit breaker controller contains two features: SOTF and frequent-operation

counter. SOTF protects the AR function in permanent faults.

The circuit breaker position information is controlled with the CB closed Pos status

setting. The setting value "TRUE" means that when the circuit breaker is closed, the

CB_POS input is TRUE. When the setting value is "FALSE", the CB_POS input is

INHIBIT_RECL

1MRS759142 C

Technical Manual

Show Quick Links

Chapters

Table of Contents