Siemens siprotec 7SA6 User Manual

Functions
6-2317SA6 Manual
C53000-G1176-C133-1
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ZR,”
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.
Figure 6-116 Breaker failure protection with common phase initiation
&
>
1
&
>CB Aux. L1
Start L123
>CB Aux. L2
CB any pole closed
S
R
Q
FNr 351
FNr 352
L1>
L2>
L3>
>
1
>CB Aux. L3
FNr 353
>CB 3p Closed
FNr 379
>CB 3p Open
FNr 380
&
Start internal w/o l
>BF Start 3pole
&
Start L123
>BF release
>BLOCK BkrFail
not allocated
allocated
„1“
Configuration
Internal blocking
>
1
>
1
>BF Start w/o l
Start internal 3pole
&
L2>
L3>
L1>
CB any pole closed
<HV
1R
>
1
>
1
&

&KN%5.&217$&7
BF Start
>
1
(from Fig 6-115)
(from Fig 6-113)
FNo 1432
FNo 1403
FNo 1415
FNo 1439
FNo 1461

Siemens siprotec 7SA6 Specifications

General

Brand	Siemens
Model	siprotec 7SA6
Category	Relays
Language	English