Siemens SENTRON Manual page 211

Transfer with T1 (kVA) = T2 (kVA) > G - variant 2
The application can also be implemented for the following configuration. Three transfer
switches are required for this application. This configuration ensures high source reliability
and thus minimum fault susceptibility.
Figure 13-6
* Dependent on the priority setting on the transfer switching equipment
Manual, 08/2017, L1V30368969104A-02
Transfer T1 (kVA) = T2 (kVA) > G
T1 T2
0 0
1 0
0 1
0 0
1 1
13.4 Transfer between three sources with two outgoing loads
G Switching state
of the transfer
switching
equipment
0 x
x P1 + P4 + P5
x P2 + P3 + P5
1 P6
x (P1 or P2)*
+ (P3 or P4)*
+ P5
Applications
Non-critical Critical load
load
OFF OFF
ON ON
ON ON
OFF ON
ON ON
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