Capacitor Question

Discussion in 'The Projects Forum' started by airconguru, Mar 5, 2014.

  1. airconguru

    Thread Starter New Member

    Mar 3, 2014
    1
    0
    I have a customer that has a piece of electrical equipment that is sensitive to incoming power instabilities. They have installed a capacitor bank for Power Factor correction that will absorb transient fluctuations and minor imbalances.

    Question is: If a capacitor bank is sized correctly and controls are in place, can the capacitors sustain operating power to the equipment (for 5-6 seconds) on a power loss or brownout?

    We need 5-6 seconds to shut the equipment down safely.

    Regards

    ~Chris
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,553
    2,375
    Not that long by any stretch, in any case you are dealing with AC so the storage level will depend at the point of switch off.
    They do not store an AC reserve to supply AC based equipment.
    Max.
     
  3. crutschow

    Expert

    Mar 14, 2008
    13,022
    3,236
    To provide 5-6 seconds of power you need some form of uninterruptable power supply (UPS). How much power does it have to supply?
     
  4. #12

    Expert

    Nov 30, 2010
    16,310
    6,817
    Not a chance. You can't store AC in a capacitor, no matter how big it is. The best you can do is a few milliseconds. That's enough to absorb transients and minor fluctuations, but it won't run anything. It seems you have a mistaken belief.
     
Loading...