UK RCD/ combined afdd breakers

[Razzle12]

Hi can someone tell me whether I need to record the trip times on x1 or x5 on this combined device,as I'm getting trip times of 44/45 ms x1 and sometimes a lot lower ie 29 ms.This device is the sole means of isolation.
Cheers

 

[Razzle12]

Go on then, only because it's Friday....
Regulation 643.8 on page 235 describes testing RCD's, see note underneath for the 40ms.

The time/current criteria they need to come up to relevant standards is in Appendix 3, page 363

Many thanks Tim .
Hopefully next time if I have to go on this forum ,I'll try and give as much info as poss.
Regards