Section 4 1MDU07212-YN Rev. D
Protection and Control Function
22 REF601 / REJ601 / REM601
Application Manual
However in case where CB closed position information is also used, the timer
resets immediately when CB closed position changes to False (i.e. CB opens).
Inter-trip receive function
This block accepts the breaker failure inter trip input from the other IED. The input
is accepted on receipt of binary input BF RECTRIP provided its own BF STAGE2
is not active.
The inter-trip logic on acceptance of receipt of binary input will activate binary
output BF RECTRIP if the level detector is reporting the exceeding of the value.
The pulse duration of BF STAGE1, BF STAGE2 and BF RECTRIP output is
200ms.
Table 11: Setting ranges Breaker failure protection
Operating phase current, ‘ICBFP’
0.2…2.0 x In, in steps of 0.1
Operating neutral current, ‘IoCBFP’
0.1…2.0 x In, in steps of 0.1
Time delay for retrip, ‘tretrip’
0.06…0.5 sec, in steps of 0.01
Time delay for backup protection,
‘tbackup’
0.06…0.5 sec, in steps of 0.01
Block the circuit breaker failure
protection
3% of set value or ± 30ms
4.6 Setting groups
REF601/REJ601/REM601 Ver. 2.2 FP1 supports two setting groups. Customer can
change the active setting groups at run time.
The active setting group can be changed by a setting parameter or via binary input.
User has an option to select number of setting groups required in the IED via
setting “No of SG”, default set as 1. When setting group is selected as 2, user needs
to select active setting group via “Active SG”.
4.7 Auto-reclose function
4.7.1 Functionality
Majority of overhead line faults are transients in nature and automatically cleared
by momentarily de-energizing the line. De-energizing of the fault location for a
selected time period is implemented through automatic reclosing, during which
most of the faults can be cleared.
In case of a permanent fault, the automatic reclosing is followed by final tripping.
The auto-reclose function can be used with any circuit breaker suitable for auto-
reclosing. The function provides four programmable auto-reclose cycles and can be
set to perform one to four successive auto-reclosures of desired duration.
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