ABB RELION REX640 Technical Manual page 1168

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