Hitachi WJ-0001S User Manual page 28

 Operating Principal and Hardware:
 Solar Water Pump Inverter :
 WJ200 & SJ700 Series of Hitachi Inverter is low voltage range AC drive and it
available for 0.4Kw to 400Kw Motor rating which is design for drawing
maximum power from PV module (Photovoltaic Cell).

Inverter has design to operate in Dual power supply AC power and DC power.
 It is operating Maximum power point tracking algorithm to derive maximum power
from PV cell at any instant while in cloudy or sunny weather.
 This inverter series specifically design for pump application which has special
reduce torque control mode with energy saving technology.
 It is design for meet requirement of pump manufacturer and OEM to customize
application as per their requirements.
 Control Mode: Reduce Torque technology is mostly utilized in pump application
where load on motor shaft have very high inertia / momentum. It operates on
starting torque is normal and afterword torque is going to reduce and increase
speed of motor. So, less power require to achieve higher speed of motor. It operate
Energy saving function while reaching nearly constant speed where optimizing input
power by reduce of output voltage and current.
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