Chapter 7 Backup Ac Power - SAJ PDS33 Series User Manual

PDS33 Series
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, it needs 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 380VAC backup AC power supply for example, the wiring is
shown in the following diagram:
AC Switch
Figure 13 schematic diagram of alternate AC power supply
If the pump motor rated voltage is three-phase 220-240VAC, then the single-phase
220VAC standby power supply L/N power line, need to be connected to the main
terminal R/T of the controller

Chapter 7 Backup AC power

AC INPUT
The DC and AC
Power In
can't input at
the same time.
R S T
+ - PB
POWER
DC Switch
Backup
AC Power
PV Array
Pump
To reverse direction,
reverse any two wires
Low-water
sensor probe
U V W
COM DI4 DI5 DI6 COM
MOTOR
Submersible
Cable Splice
Earth Ground
Pump Motor
- 42 -
Remote Float
Switch
NC
N0
Low Water
Level Probe
(optional)