17
Remark Name
Description
Q1 Maintenance switch
Provide DC input for control power supply
Disconnect Q1 for isolation during power failure
Q2
External power sup-
ply control switch
Provide external input for distribution transformer
Q3
Internal power sup-
ply control switch
Provide internal power supply for distribution
transformer
QF1
AC circuit breaker
Connecting/disconnecting the AC side of the PCS
QS1
DC load switch
Connecting/disconnecting the DC side of the PCS
figure 3-3 External Power Supply Interface
Disconnect Q3 and close Q2 for external power supply.
3.4.3 Cable Inlet/Outlet Design
For easy wiring in the field, all cables between the PCS internal devices are connected be-
fore delivery.
All cables between the PCS and the external devices are routed through the bottom of the
PCS. All cables come into or out of the PCS should be protected properly, for example, using
cable pipe to prevent damage by rodents. After wiring, all cable entries except for cable
glands should be sealed with fireproof mud or other appropriate materials.
The bottom cable entries are shown in the following figure.
System Manual 3 Product Description
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