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different current ratings

Sykes93

Oct 15, 2012
2
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Oct 15, 2012
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ok, so i need to control the flow rate coming out of a water pump, to do this i decided to use a variac, my question is, if the pump is rated at 0.7A, can i use a 2.5A variac with it? (it will go in the order, power supply, variac, water pump) I thought i could because its the pump that draws the current, but im not sure and i need to know quickly.
 

shrtrnd

Jan 15, 2010
3,876
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Jan 15, 2010
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3,876
Yes.
There'll be a cross-over point when the voltage/current is enough to drive the pump.
The pump will only draw the .7A, even though your vaiac is capable of 2.5A.
 

duke37

Jan 9, 2011
5,364
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Jan 9, 2011
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5,364
The order must be mains, Variac, power supply, water pump.
Presumably the power supply is a simple one without voltage regulation and the motor is run on DC.
 
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