PDS33 Series
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Chapter 8 Backup AC power
In order to ensure continuous water supply, solar water pump system can be
manually switched to standby AC power supply when the light is insufficient or
wet days. When switching, the need to ensure that the DC and AC power supply
reliable mutual lock. Backup AC power source can be a local power grid, or a
diesel generator (please refer to the 2.4.3 technical form).
Warning: at any time, only one power supply can be entered, otherwise it may
cause the controller to damage.
Take three phase AC 380V backup AC power supply for example, the wiring is
shown in the following diagram:
Figure 14 schematic diagram of alternate AC power supply
+ -
R S T
PB U V W
COM DI4 DI5 DI6 COM
POWER
MOTOR
GR
OU
ND
GR
OU
ND
Power In
The DC and AC
can't input at
the same time.
AC INPUT
To reverse direction,
reverse any two wires
Pump
Low-water
sensor probe
Remote Float
Switch
PV Array
Earth Ground
Pump Motor
Submersible
Cable Splice
DC Switch
Low Water
Level Probe
(optional)
Backup
AC Power
AC Switch
