Our ECA expert helps out a Voltimum user with a question on the best way to deal with a technical conundrum.
Question:
Hi, when recording readings for (RCD-30- ma) (devices to 61008-1) a schedule of test results, am I correct in thinking you record the highest value obtained for example as below, testing both halves of the wave form at (0-180) (6) tests in total - recording the highest reading taken between cycles.
x-1/2 (In) no trip
x-1 (In) under (300ms)
x-5 in under (40ms)
Or do I record the (x 5) reading only?
Thanks in advance.
Answer:
Hi there.
It would depend on what the purpose of the RCD is. If it is for additional protection then you would record the value of the equal to or higher than 5 times the rated current, Regulation 643.8 discusses this.
In many cases a 30 mA RCD will be used for additional protection so you are often best off recorded the 5 times (or higher) value for 30 mA RCDs and for >30 mA RCDs the 1 times would suffice.
Thanks
Gary Parker - ECA