Transfer Between Three Sources With Two Outgoing Loads - Siemens SENTRON Manual
Transfer switching equipment and load transfer switches
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Applications
13.4 Transfer between three sources with two outgoing loads
13.4
Transfer between three sources with two outgoing loads
Transfer with T1 (kVA) = T2 (kVA) > TG - variant 1
Applications with one generator (G) and two transformers (T1 and T2) are described below
for the case where the power of the two transformers is greater than that of the generator
(T1 (kVA) = T2 (kVA) > G). By using two transfer switches, this complex application can be
realized, thus enabling the power supply to be maintained. The load is divided into a critical
and non-critical load here.
Figure 13-5
* Dependent on the priority setting on the transfer switching equipment
210
Transfer T1 (kVA) = T2 (kVA) > G
T1
T2
0
0
1
0
0
1
0
0
1
1
G
Switching state
of the transfer
switching
equipment
0
x
x
P1 + P3
x
P2 + P3
1
P4
x
(P1 or P2)*
+ P3
Manual, 08/2017, L1V30368969104A-02
Non-critical
Critical load
load
OFF
OFF
ON
ON
ON
ON
OFF
ON
ON
ON
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