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3 phase arcing
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<blockquote data-quote="colingaffney" data-source="post: 480514" data-attributes="member: 2936"><p>I have a 3 phase installation arcing just above the main MCCB switch integral within a 250amp 3 phase hager fuseboard .</p><p></p><p>It is the buzz bar linking kit .</p><p></p><p>It has blown all 3 250amp fuses in the main head twice now .</p><p></p><p>On the 1st visit all 3 fuses had blown and nothing else and then the 2nd time all the fuses blew + the mccb switch had blown also .</p><p></p><p>There is no loose connection eg all nuts and bolts are tight and i'm getting more then 200m ohms if I test between the earth and any of the phases or between any of the phases .</p><p></p><p>The strange thing is there is about 20 volts coming through one of the phases to earth even though the main fuses are blown .</p><p></p><p>The buzz bars are fairly damaged eg what looks like chipped at the edges presumably through arcing .</p><p></p><p>Does anyone know what this means .</p><p></p><p>Colin </p></blockquote><p></p>
[QUOTE="colingaffney, post: 480514, member: 2936"] I have a 3 phase installation arcing just above the main MCCB switch integral within a 250amp 3 phase hager fuseboard . It is the buzz bar linking kit . It has blown all 3 250amp fuses in the main head twice now . On the 1st visit all 3 fuses had blown and nothing else and then the 2nd time all the fuses blew + the mccb switch had blown also . There is no loose connection eg all nuts and bolts are tight and i'm getting more then 200m ohms if I test between the earth and any of the phases or between any of the phases . The strange thing is there is about 20 volts coming through one of the phases to earth even though the main fuses are blown . The buzz bars are fairly damaged eg what looks like chipped at the edges presumably through arcing . Does anyone know what this means . Colin [/QUOTE]
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3 phase arcing
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