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Phillips streetlight ballast replacment help.

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  • 30-11-2012 7:01pm
    #1
    TURRICAN
    Closed Accounts Posts: 717 ✭✭✭


    Hi all.
    Il explain how I have this wired first.
    Power from main connector to ldr to the transformer and capacitor. Then from an output on the traffo to the bulb.
    Neutral from the main connector to the capacitor and on to the lamp.

    When I switch on I get nothing but buzzing but the light wont come on.
    Here's a picture of the traffo


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    #2
    RoundyMooney
    Closed Accounts Posts: 10,910 ✭✭✭✭RoundyMooney


    You're missing an ignitor.

    The fitting was most likely designed to work with a Son-I lamp. A standard Son won't work.


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    #3
    TURRICAN
    Closed Accounts Posts: 717 ✭✭✭TURRICAN


    I got it sorted.
    Bulb was blown,
    I got continuity on it tho,
    Which led me to believe something else was wrong.

    Transformer doesn't output voltage to bulb as there is a high impedance in the bulb thru the igniter so it goes thru the cap instead.

    When the igniter fires an arc the current then goes thru the bulb.

    Igniter is in the bulb.


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    #4
    RoundyMooney
    Closed Accounts Posts: 10,910 ✭✭✭✭RoundyMooney


    Yep, a Son I then.

    As the lamp only strikes at high voltage, a continuity test is worthless.

    The capacitor is for power factor correction and interference suppression btw, not as some sort of shunt.


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