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1MAC050144-MB C
Section 6
Supervision functions
615 series ANSI
473
Technical Manual
SCFD decision
If the self clearing fault is detected in at least one phase, the PICKUP and TRIP outputs
are set to TRUE. Also SCDetect in monitored data is set to TRUE.
When one phase detects a fault, the algorithm waits for 1 cycle time and during this period
if other two phases have detected a fault, the event is considered as three phase event and
the Event3Ph in monitored data is set to TRUE.
Activation of the BLOCK input deactivates all the binary outputs.
6.7.5
Signals
Table 403: CFD Input signals
Table 404: CFD Output signals
Name
Type
Default
Description
I_A
SIGNAL
0
Phase A current
I_B
SIGNAL
0
Phase B current
I_C
SIGNAL
0
Phase C current
BLOCK
BOOL
0=FALSE
Block overall function.
Name
Type
Description
TRIP
BOOLEAN
Trip
PICKUP
BOOLEAN
Pickup
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