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Here's a weird one.. customer complains of sporadic rcd tripping some time ago so I do a series of tests, only thing on rcd are skts and lights... never got to the bottom of it but I noticed the quirky Square D quikline rcd trips at around 15mA on a ramp test.
So I recommend replacing the whole DB, as its quite old anyway, which Ive just done with rcbos.. no real problems apart from a N-N ring open but found this at a kitchen socket and now ok.. All tests fine, downstairs ring lowest IR was N-E 170MOhm at 500V dc. Auto rcd test trips at 29ms at both x1 and x5.
Now when the plasma screen tv is plugged in at the lounge, the ring trips after a few seconds. When tv is plugged into the next socket along, about 3m away via a reel extension, it works and doesnt trip... Its on the same cct.
when anything else is plugged into the tv socket (and there's a lot of media stuff on it too) its fine. Kettle plugged into it will go to boiling no problem.
when tv is plugged back into the original skt via the extension reel, it trips again!
replaced the socket just in case but no difference.
WTF? Any suggestions welcome.. I'm going back to do a pat test on tv this afternoon but is this weird or am I missing a trick here?
So I recommend replacing the whole DB, as its quite old anyway, which Ive just done with rcbos.. no real problems apart from a N-N ring open but found this at a kitchen socket and now ok.. All tests fine, downstairs ring lowest IR was N-E 170MOhm at 500V dc. Auto rcd test trips at 29ms at both x1 and x5.
Now when the plasma screen tv is plugged in at the lounge, the ring trips after a few seconds. When tv is plugged into the next socket along, about 3m away via a reel extension, it works and doesnt trip... Its on the same cct.
when anything else is plugged into the tv socket (and there's a lot of media stuff on it too) its fine. Kettle plugged into it will go to boiling no problem.
when tv is plugged back into the original skt via the extension reel, it trips again!
replaced the socket just in case but no difference.
WTF? Any suggestions welcome.. I'm going back to do a pat test on tv this afternoon but is this weird or am I missing a trick here?