small DC capacitor bank precharging

Discussion in 'General Electronics Chat' started by mcgyvr, Sep 28, 2012.

  1. mcgyvr

    Thread Starter AAC Fanatic!

    Oct 15, 2009
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    Just looking for some suggestions on a simple temporary "pre-charging" circuit for a small bank of capacitors. It is just 4 x 23000uF (75V) caps in parallel across the input of a 48VDC bus. There is a 700 ohm 10W bleeder resistor too (1 resistor for all 4 caps)
    I was thinking about just a 100W lightbulb or something placed in series with the input and when the bulb goes out it should indicate its charged..

    Sound good? any other suggestions.
     
    Last edited: Sep 28, 2012
  2. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    My guess is that lamp would not be visable at near full charge, V low, resistance falling, power to bulb- ziltch. Voltmeter might work.
     
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