i have 2 huge submersible pumps.
when water is full, the pump will operates.
the pump are quite new (less than 3 mth old )
it ramp up slowly via VSD to 50hz
when there is no more water , the pump ramp down slowly via vsd
prob:
the 2 pump very often will have overload trip
when it ramp down..there will be high amp.
different engineers have concluded that there is no prob with the motor (they mega it )
there is no prob with the cable.
the water suction to the pump has no obstruction.
any experts know why?
when water is full, the pump will operates.
the pump are quite new (less than 3 mth old )
it ramp up slowly via VSD to 50hz
when there is no more water , the pump ramp down slowly via vsd
prob:
the 2 pump very often will have overload trip
when it ramp down..there will be high amp.
different engineers have concluded that there is no prob with the motor (they mega it )
there is no prob with the cable.
the water suction to the pump has no obstruction.
any experts know why?
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