Siemens SENTRON ATC6500 - Application D: 2 S - 1 T - AI

Applications
3.1 Transfer control
3KC ATC6500 transfer control device
24 Manual, 05/2019, L1V30538268002A-01
3.1.4.4 Application D: 2S - 1T - AI
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 application, both loads are supplied by one source each in normal circumstances
(both sources available). If Source 2 fails, both the prioritized load and the non-prioritized
load are supplied by Source 1. Source 2, on the other hand, only supplies the prioritized
load.
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
Open
1
0
Closed
Open
Closed
1 1
Closed
Closed
Open
0 = Infeed source not available
1 = Infeed source available
Note
In this case Source 1 is regarded as t
he main source. The transfer can be influenced by
modifying the source priority.
See also
Parameterization (Page 155)
Transfer (Page 227)