Large oven tripping RCD

[Pete999]

think he means if the PF is below unity, e.g.0.8 or less. i'd like to know why it might cause rCD tripping though. in this situation, I'd shift the oven onto a 40A RCBO and see if it held.this would eliminate cumulative leakage.

Yeah me as well but I was being or trying to be diplomatic.

 

[Jim Cartledge]

As an RCD is a current operated device, why would the 'power factor' have anything to do with it tripping? The power factor is related to the cosine of the angle between the voltage and the current.

 

[Pete999]

Yes figures on the IR test. And test the appliance too. In fact, do that first. After you have corrected the MCB size on that circuit.

Oh hold on. If you are a trained electrician, you really need to check your college notes. You have forgotten some essential basic things.

College notes?

 

[Dustydazzler]

Technically speaking 6mm cable of a 50a mcb is a no no , it either needs to be 10mm or reduce the mcb to a 40

But I have seen an experiment done by J.W where he gets some 1.5mm clipped direct cable to draw very near 70 amps for a considerable length of time before starting to smoke.

Back to the OP , my single build in oven has the strange tendency to trip my house rcd from Time to time

 

[Pete999]

As an RCD is a current operated device, why would the 'power factor' have anything to do with it tripping? The power factor is related to the cosine of the angle between the voltage and the current.

An RCD operates on earth leakage, Jim, it is not an OCPD!

 

[DPG]

An RCD operates on earth leakage, Jim, it is not an OCPD!

But still current operated.

 

[richy3333]

Well the OP hasn’t been back so I guess the house burnt down

 

[Jim Cartledge]

An RCD operates on earth leakage, Jim, it is not an OCPD!

It operates on Residual Current i.e. the in-balance between Phase and Neutral. So what does that have to do with power factor?