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
    7
    0
    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.

    Kevin
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,750
    760
    If they are mercury vapor lamps. then Don't try anything.
    You are begging for disaster
     
  3. JDT

    Well-Known Member

    Feb 12, 2009
    658
    85
    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.
     
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