UK RCD test ... What does this mean?

[WellMeaning]

I came across "RCD was working fine with x1 29 x 5 16 and functional test was tripped twice". What does that mean?

(I'm not an electrician.)

 

[Mike Johnson]

A little bit more information would have been nice, but I assume this was on an Electrical report, if it was, it looks like the tripping time in ms for a 1xI∆n test @ 29ms and a 5xI∆n test @ 16ms tested at 0 and 180 deg's.

Have a look here:

 

[WellMeaning]

My apologies - I shouldn't have posted when my brain was falling asleep.

It was referred to as the test results for a Wylex 100A 100mA DP type S RCD.

 

[Mike Johnson]

I assume the above post has given you the answer you need?

 

[WellMeaning]

I think so. That and a bit of googling.

My inference is that tripping at 29ms for a type S would mean the RCD is faulty. Type S should last way longer shouldn't it? I think I saw type S are max one second, so anytrhing over 500ms is acceptable.

 

[loz2754]

I think so. That and a bit of googling.

My inference is that tripping at 29ms for a type S would mean the RCD is faulty. Type S should last way longer shouldn't it? I think I saw type S are max one second, so anytrhing over 500ms is acceptable.

On site guide section 11. Type s should trip between 130ms and 500ms.

 

[Mike Johnson]

A type S does not provide personnel protection? so be very wary if that is all you have in the DB.