Heavy Duty Relay Induction Query (not asked before)

Discussion in 'General Electronics Chat' started by kevinhannan, Apr 7, 2010.

  1. kevinhannan

    Thread Starter New Member

    Oct 5, 2009
    Hi Everybody,

    Thanks for stopping by: I would appreciate your thoughts and help if possible, please.

    I have two security lighting ballasts at 1000w each.
    They create an enormous induction at start-up.

    Would it be appropriate to put in some relay/mains load protection here of the resistor/capacitor/diode kind?
    If so, what values should I be using?

    Many thanks again for stopping by, any thoughts are appreciated.

  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    If they are mercury vapor lamps. then Don't try anything.
    You are begging for disaster
  3. JDT

    Well-Known Member

    Feb 12, 2009
    That's how they work!

    Not only does the inductance control the current in the running lamp but, on start-up, in conjunction with the ignitor, a voltage spike starts the lamp.

    Hopefully, you have a power-factor-correction capacitor across the supply?

    This not only corrects the P.F. but will also help to prevent voltage spikes being fed back to the supply.