Siemens SENTRON Manual page 208

Applications
13.2 Transfer between two sources with two outgoing loads
Transfer with T1 (kVA) = T2 (kVA)
The transfer switching equipment also offers innovative approaches for connection to two
non-differentiated transformers with equal power (T1 (kVA) = T2 (kVA)).
Figure 13-3
208
Transfer T1 (kVA) = T2 (kVA)
T1
0
1
0
1
T2 Switching state of the
transfer switching
equipment
0
0 P1 + P3
1 P2 + P4
1 P1 + P3
Loads
x OFF
ON
ON
ON
Manual, 08/2017, L1V30368969104A-02