Table 1114: Retrip logic operation
Value of setting CB
fail retrip mode
Value of setting CB
failure mode
Retrip functionality
Off
Current
Breaker status
Both(AND)
Both(OR
Retrip functionality switched off. TRRET is
not activated.
Without Check
Current
Breaker status
Both(AND)
Both(OR
TRRET is activated after Timer 1 elapses.
Current check Current
TRRET is activated after Timer 1 elapses and
any phase current exceeds
Current value
set-
ting.
Breaker status
TRRET is activated after Timer 1 elapses and
CB is in closed position.
Both(AND)
TRRET is activated after Timer 1 elapses and
CB is in closed position and any phase cur-
rent exceeds
Current value
setting.
Both(OR)
TRRET is activated after Timer 1 elapses and
either of the following is true:
• CB is in closed position.
• Any phase current exceeds
Current value
setting.
TRRET activation is blocked if either CB_FAULT_AL output (from Timer 3)
is active or the BLOCK input is activated.
Once activated, TRRET remains active for the set
Trip pulse time
or until the reasons
for activation are reset. TRRET is also reset if CB_FAULT_AL or BLOCK is activated.
Protection related functions
1MRS759142 F
1168 REX640
Technical Manual
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