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Thread: Running Amps Vrs. Inrush Amps

  1. #1
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    Running Amps Vrs. Inrush Amps

    I just took a reading on my Sequence return pump, 1.4 amps @ 22ft of head rated, if I crank it down it drops to 1.3 amps & open wide 1.6 amps @ 1440gph & a surge of 9.6 amps that is typical for inrush amperage! Can you imaging a ¼ H.P. 3080BTU chiller running at 4.5 amps what the inrush is 24.6 amps!

    Thought I'd post these up for future reference, all taken with a Fluke 334 clamp meter.

  2. #2
    That's Dumas!

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    How did you determine the head pressure?

    Don't even want to know the initial amperage of the 3/4 hayward I originally ran.....
    of course it was running 24/7

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    To put it simple, I used a Head loss Calculator, Reef Central has one that is very popular but there are more online.

    http://www.reefcentral.com/calc/hlc2.php

    http://www.geocities.com/Eureka/Conc...075/hazen.html

    What kind of Hayward are you running?

  4. #4
    That's Dumas!

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    3/4 hayward I originally ran
    I have found the calculators to be a good starting point as well.

  5. #5
    Copepod
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    Scooterman FLA(full load amps) is 6% of inrush or LRA(locked rotor amps).. The inrush amp rating, equals the energy used to get a load to full speed and usually last no more then a couple of seconds........

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