MC30-BC
Doc. N°
MO-0365-ING
Copyright 2008
FW 980.09.01.X
Date
15.06.2022
Rev.
1
Pag.
16
of
37
3.7 - IoH (3F51N) - Third Earth Fault protection level
FuncEnab
→
Enable
[Disable / Enable]
Options
→
BI
Disable
[Disable / Enable]
→
Trg
Enable
[Disable / Enable]
TripLev
→
IoH
2.00
Ion (0.01
9.99)
step 0.01
Ion
Timers
→
tIoH
0.10
s
(0.05
60)
step
0.01
s
Description of variables
FuncEnab
: If disable the function is disactivated
BI
: Operation controlled by Blocking Digital Input
Trg
: Function operation triggers the oscillographic wave form capture
(see § Oscillographic Recording)
IoH
: Minimum Zero Sequence Residual Current Pick-up level
tIoH
: Trip time delay
Trip when
:
The current trip level is exceeded for time “tIoH”.
When the function is tripped
:
Signalization
=
Led “Trip” is illuminated
Last Trip
= Is recorded
Function reset when
: The current drop below 95% IoH.
Led reset when
: Push-button is pressed
3.8 - BF (F51BF) - Breaker Failure
FuncEnab
→
Enable
[Disable / Enable]
Options
→
TrR
Relay1
Relay1
–
Relay2
–
Relay3
–
Relay4
TripLev
→
No Param
No Parameters
Timers
→
tBF
0.2
s
(0.05
0.75)
step
0.01
s
Description of variables
FuncEnab
: If disable the function is disactivated
TrR
: Output relay programmed for trip command to the Circuit Breaker
tBF
: Trip time delay
Operation
: If after the time “tBF” from pick
-
up of the programmed relay “TrR” the current measured still
exceeds 5%In, the output relay associated to the “BF” function is operated (relay another than TrR).
