I delta M

Just seeking a wee bit of clarification on I delta m. Literature indicates that it is the maximum breaking capacity of residual current as distinct from the maximum breaking current. Just not sure how to interpret that.

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0 lyledunn 5 months ago

This is a RCD so breaks only one kind of fault. Are they suggesting 1000A if no death and glory 100A fuse but 10000A with one? I have searched a lot of literature but cannot find a definitive answer.
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0 Chris Pearson 4 months ago in reply to lyledunn

I think that is probably what it means.

This link may help - see page 11.

As I understand it, I_m is the rated breaking capacity and I_Δm is the rated residual breaking capacity.

Confusingly, in BS7671, I_m is something completely different.
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0 Chris Pearson 4 months ago in reply to lyledunn

I think that is probably what it means.

This link may help - see page 11.

As I understand it, I_m is the rated breaking capacity and I_Δm is the rated residual breaking capacity.

Confusingly, in BS7671, I_m is something completely different.
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I delta M

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