Cirrus
Distinguished Member
Tested two circuits today and all was ok until RCD trip times. On x5 The reading was 11ms. However, on x 1 it was showing >300ms. Is this a fail on an EIC?
Help - RCD Trip times
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did you do the X1 test first? Was the mechanism sticky and the initial testing freed it up?
Cirrus
Distinguished Member
Yup, did x 1 first and gave me >300. Then did x5 with no problems. Changed back to x1 and still >300
If it didn`t trip, assuming you had the correct parameters set - change the RCD.
Could be worth ramp testing too, to be sure
KME
Could be worth ramp testing too, to be sure
KME
Evenin mate. How doing???? 5-a-side team and manager alright too?
Cirrus
Distinguished Member
Thanks chaps, have decided to change the CU tomorrow so hopefully this will rectify things.
Try removing the circuit (L + N) from the RCD and test it in complete isolation..
I had one the other day like this.. circuit tested out ok, but when it was connected to the RCBO it failed to trip on one of the tests...
I had one the other day like this.. circuit tested out ok, but when it was connected to the RCBO it failed to trip on one of the tests...
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You don't do things by halves! If an old lady calls you out to replace a lamp outside you rewire the lighting circuit............
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You havent got a Time Delayed RCD in the circuit have you?
i.e. 'Type S' (selective)...
which could have operating times within a range of 130ms - 500ms??? ?:|
e.g. Page 92 O-S-G, 11.3 bullet point (ii).
OR
as has been mentioned....
You ARE testing the RCD with the circuit (load) disconnected? :|
As per 11.1 O-S-G page 91,
general test procedure RCD operating times.
Guinness 
