RCD Times on EIC

[SirKit Breaker]

You should also be aware, if you don't already know, that the RCD must be tested x 1/2 rated trip current, x1, and x5, at 0 degrees and 180 degrees, then mechanical test button, so 7 tests in all. I am refering to the 30ma ones used in domestic, there are other RCD's available.

 

[ian.settle1]

record the 1x1 which should be the highest trip time obviously if you have a trip time over 40ms on either 1x1 5x1 you would have to check your rcd or meter

Why on x1 as it can be up to 200 or 300 mS depending upom BS.

 

[ian.settle1]

page 82 16th edition on site guide 11.5 wher an rcd or rcbo with a rated residual operating current of 30ma is used to provide supplementary protection against direct contact with a test current of51 n the device should open in less than 40ms, unless the the protective conductor potential rises by less than 50v
regards

We are on the 17th now

 

[andyb]

can anyone tell me where to find in brb, the 40msec. max.trip time for RCD?

Table 3A, Appendix 3

 

[telectrix]

thanks andy. what i was referring to tho' was mad frankie's 40msec @ x1

 

[andyb]

That's right Telectrix, last column,
40ms @ 150ma for a 30ma rcd.

 

[andyb]

Sorry Telectrix, see what you mean. It's 300ms @ x1

 

[telectrix]

yeah, got that. i have always gone with 200msec as a guideline until a friendly factory electrician copied the brb for me.he was writing for hours. lol

 

[nickblake]

I think there should be another columb x1 x5 and Ramp , be so usefull when an inspections do a few years after to see if the RCD ramp test is still tripping as recorded

 

[telectrix]

good point nick. seems very few of us bother with ramp test except when there is a problem e.g.nuisance tripping. be good to see box on a cert. for ramp test.

 

[mad frankie]

We are on the 17th now

i know that its the same in the 17th.

 

[mad frankie]

yeah, got that. i have always gone with 200msec as a guideline until a friendly factory electrician copied the brb for me.he was writing for hours. lol

sorry lads i was miles away
300ms max @x1 40ms@x5
hope your factory electricians really freindly he may have to copy from the bgb if the new regs comes out.
how many of you want to sit that again after having just sat the last edition within the last 2years

 

[andyb]

I wouldn't worry Mad Frankie, it's only an amendment coming out next year so there will be no exam.
The 16th edition had several amendments during its 17 year history.

 

[telectrix]

i'll take the 5th amendment!

 

[mad frankie]

I wouldn't worry Mad Frankie, it's only an amendment coming out next year so there will be no exam.
The 16th edition had several amendments during its 17 year history.

we will still have to purchase a new book
your mate better ask santa for some pencils.