Application O: 2S - Npl - Siemens SENTRON ATC6500 Manual

3.1.4.5

Application O: 2S - NPL

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, on failure of the
prioritized sources (in this case, Source 1), only the prioritized load is supplied by the
secondary source (in this case, Source 2). In normal circumstances (Source 1 available)
both sources are supplied by the main network.
Source 1 (SRC1) Source 2 (SRC2)
0 0
0 1
1 1
0 = Infeed source not available
1 = Infeed source available
Note
In this case Source 1 is regarded as the main source. The transfer can be influenced by
modifying the source priority.
See also
Parameterization (Page 155)
Transfer (Page 227)
3KC ATC6500 transfer control device
Manual, 05/2019, L1V30538268002A-01
Breaker 1 (BRK 1)
Open
Open
Closed
Breaker 2 (BRK 2)
Open
Closed
Open
Applications
3.1 Transfer control
Tie breaker (TB/NPL)
Open
Open
Closed
25