'(& )( )'& &) ( &!& ")& &$(( $# Ć %&( $# #)" &&#$
4 - 36
Siemens AG ⋅ May 1998
&
2
1
3
2
1
3
(annunciation and blokĆ
king of CBF)
further processing in
the CBF operation
modes (chapter4.7)
(annunciation and blokĆ
king of the feeder-selecĆ
tive CBF-BI)
(annunciation and blokĆ
king of the feeder-selecĆ
tive BI "CBF Lx")
&
CBF/BI-RELSup>T
P
T-CBFRELSup
DA 6314/ZE
P T-CBFRELflt
DA 6315/ZE
CBF/BIFlt:Lx:Ayy
P T-CBF x 10
DA 6204/ZE
t1
12/ZE
9; 10; 11/ZE
CBF/BIFlt:Lx:Ayy
9; 10; 11/ZE
P 1/2-channel
DA 6201/ZE
t1 1
P with/without monitoring
DA 6201/ZE
4.7.8.6 Current-controlled reset of the TRIP
command
For reset of the TRIP command, it must be ensured
that the controlled circuit breaker has really opened
and that the tripping current circuit of the bay unit has
been interrupted by the circuit breaker auxiliary conĆ
tact.
Interruption of the tripping current by the command
relay causes overload for the contacts and their desĆ
truction.
For realisation of the current-controlled command
reset, the time steps T-TRIP-DUR (DA 6106/ZE) and
T-CBF (DA 6204/ZE) are started after the TRIP comĆ
mand.
After the TRIP command minimum time has elapsed,
the current limit value monitor is activated. If the curĆ
rent falls below the feeder-related threshold I > CBF
(DA 67xx/ZE), then the relays for the TRIP and transĆ
fer trip command reset.
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