Siemens siprotec 7SA6 User Manual page 413

7SA6 Manual
C53000-G1176-C133-1
L1>
> 1
L2>
L3>
Start L123
FNr 351
>CB Aux. L1
FNr 352
>CB Aux. L2
FNr 353
>CB Aux. L3
FNr 379
>CB 3p Closed
FNr 380
>CB 3p Open
Figure 6-115 Creation process of signal "CB any pole closed"
If an internal protection function or an external protection device trips without current
flow, the internal input "Start internal w/o I" or the external input "!%) 6WDUW ZR ,"
is used to initiate the breaker failure protection. In these cases the breaker auxiliary
contact position is the only criterion for the response of the circuit breaker.
Initiation can be blocked via the binary input "!%/2&. %NU)DLO" (e.g. during testing
of the feeder protection relay). Additionally, an internal blocking option is provided.
(from Fig 6-115)
CB any pole closed
L1>
L2>
L3>
Start internal w/o l
FNo 1439
>BF Start w/o l
Start internal 3pole
FNo 1415
>BF Start 3pole
„1"
FNo 1432
>BF release
FNo 1403
>BLOCK BkrFail
Internal blocking
Figure 6-116 Breaker failure protection with common phase initiation
&
S Q
R
> 1
"(( 8uxÃ7SFÃ8PIU68U
<HV
1R
> 1
&
> 1
> 1
> 1
Configuration
not allocated
allocated
&
Functions
& CB any pole closed
> 1
&
Start L123
&
FNo 1461
BF Start
6-231