any expert here on pump system and electrical? - The Asian Commercial Sex Scene

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any expert here on pump system and electrical?

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01-02-2014, 10:40 PM

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any expert here on pump system and electrical?

An honorable member of the Coffee Shop Has Just Posted the Following:

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?

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