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rsin
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Join Date: Jun 2009
Posts: 2

Three-Phase ELCB with Unbalances Single-Phase Load

06/24/2009 1:06 AM

If i will use 3 phase 4-pole ELCB in unbalance single phase load, will it trip? How about if using only L1, L2 & N (L3 is open)?
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#1

Re: 3 phase ELCB with unbalance single phase load.

06/24/2009 3:15 AM

No, it won't.

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Simon Wan
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#2

Re: Three-Phase ELCB with Unbalances Single-Phase Load

06/24/2009 8:42 PM

ELCB is called Earth Leakage Circuit Breaker. The ELCB will only trip if there is any current leakage to the earth. As long as your unbalance load of the 3 phase + the neutral wire with the total sum of "Zero" current (R+Y+B+N=0) then the ELCB will not trip.

Any current that leak to the earth (R+Y+B+N = < 0Amp), the ELCB will trip.

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rsin
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Join Date: Jun 2009
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#3
In reply to #2

Re: Three-Phase ELCB with Unbalances Single-Phase Load

06/26/2009 10:13 AM

Thanks!
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