RCD OR Earth Leakage Unit tripping

Halo

According to regulation all three phase plugs have to be on a RCD or Earth Leakage Unit supply. We have machines that mostly use heating elements and they cause nuisance tripping. The standard ELU has a 30mA rating do you get a unit and are you allowed to install one with a higher rating.

Or has any one else have a similar problem and what did you do to solve it?

Thank you
Jurie
asked 1/31/2016
Interserve2
Interserve

1 Answer

Hi Jurie,

Its true many regulators have stringent requirements on earth leakage protection. However, they may or may not specify the 'sensitivity' for earth leakage protection. RCDs / RCBOs / ELCBs come in various 'sensitivities' - 30mA, 100mA and 300mA being most prevalent. 30mA ones are the most sensitive and are generally used for household appliances, lighting circuits, etc. where human intervention with the equipment is high. 100mA or 300mA are most suitable for your application where the 'normal' leakage currents are high and human intervention is less, e.g. saw mills, welding machines, furnaces, workshop tools, etc. I think you also get RCDs with settable range of operation, which might help your cause further.

Hope this answers your question.

Fahad Shaikh.

answered 4/17/2016 fahad8413 2
fahad8413

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