Are you all organised and have a supply of the new certificates to hand?
What do you actually think of them?
Andy B.
If an RCD does not trip at 1 x Idelta n then it is defective. This softer test is a better indicator of RCD health than the 5 x test and consumer safety.
This does not unfortunately take account of a small number of cases where the RCD passes a 1x test, but then goes on to fail a 5x test, although I agree this is not simply a case of "sticky RCD".
In fact, I am undecided in some cases whether this phenomenon is a combination of other external influence and/or a property of how a particular test set operates under given conditions.
Having said that I have seen this behavior on devices with different test sets at the same time doesn't help, as an influence on the supply might well have caused the problem, and of course we know of cases where RCDs returned to manufacturers having "failed" on-site have been tested in isolation and found to be operating perfectly well.
But that in itself causes another question regarding RCDs used for Additional Protection, or fault protection where 0.2 s disconnection time is required ... i.e. will they actually operated as expected?
If an RCD does not trip at 1 x Idelta n then it is defective. This softer test is a better indicator of RCD health than the 5 x test and consumer safety.
This does not unfortunately take account of a small number of cases where the RCD passes a 1x test, but then goes on to fail a 5x test, although I agree this is not simply a case of "sticky RCD".
In fact, I am undecided in some cases whether this phenomenon is a combination of other external influence and/or a property of how a particular test set operates under given conditions.
Having said that I have seen this behavior on devices with different test sets at the same time doesn't help, as an influence on the supply might well have caused the problem, and of course we know of cases where RCDs returned to manufacturers having "failed" on-site have been tested in isolation and found to be operating perfectly well.
But that in itself causes another question regarding RCDs used for Additional Protection, or fault protection where 0.2 s disconnection time is required ... i.e. will they actually operated as expected?
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