Siemens SENTRON ATC6500 - Application C: 2 S - 1 T - si

Applications
3.1 Transfer control
3KC ATC6500 transfer control device
Manual, 05/2019, L1V30538268002A-01
23
3.1.4.3 Application C: 2S – 1T – SI
SRC1 (kVA) = SRC2 (kVA)
In this application three motor-driven circuit breakers are used. A distinction is made
between prioritized load and non-prioritized load (NPL). In this case, both loads are supplied
by one source each in normal circumstances (both sources available). If one source fails, the
prioritized and non-prioritized loads are supplied by the source that remains available.
The states can be obtained from the table:
Source 1 (SRC1)
Source 2 (SRC2)
Breaker 1 (BRK 1)
Breaker 2 (BRK 2)
Tie breaker (TB)
0
0
Open
Open
Open
0
1
Open
Closed
Closed
1
0
Closed
Open
Closed
1 1
Closed
Closed
Open
0 = Infeed source not available
1 = Infeed source available
Note
In this case the priority of the sources is unimport
ant.
See also
Parameterization (Page 155)
Transfer (Page 227)