recently saw some "click" c/u advertised at a bargain price at a large local dealer, bought 2 and thought about a bit of extra profit on next job....great. installed one in cumbria (60 mile drive), when i came to test the rcd, it would not trip, either on test button or test instrument. well, i suppose thats life, but i am ok, cos i have a spare in the second c/u. went back to cumbria and fitted new rcd. exactly the same, would not work. tried excersing it etc to no avail.thought it must be me, rechecked all connections, all ok, rcd working as a manual 2 pole isolator ok,all other test, polarity earth loop etc all ok, then connected a supply to both units on the bench, niether would trip on test button, am i missing something?
i returned the faulty rcd to scolmore who make them with explanatory note, they returned it later no fault found. again, tried it on the bench and it wouldn't operate. bought a different make for my third trip to cumbria, tried it on the bench and it worked fine.
the rcd is a "click" DB300 63A 30ma unit. has any one else had problems with these, or is there some unusual method required to test them?
i would add, i have been doing this job for some considerable time and this is first time i have had 2 new units fail to operate.
i returned the faulty rcd to scolmore who make them with explanatory note, they returned it later no fault found. again, tried it on the bench and it wouldn't operate. bought a different make for my third trip to cumbria, tried it on the bench and it worked fine.
the rcd is a "click" DB300 63A 30ma unit. has any one else had problems with these, or is there some unusual method required to test them?
i would add, i have been doing this job for some considerable time and this is first time i have had 2 new units fail to operate.