max disconnection time for TT system

[danny7299]

h i all ,

just a quick one what is the max diconnection time allowed on a TT system for final circuits under 32Amp . all cuircuit are on 30ma RCD.

Many thanks

Dan

 

[m4tty]

Isn't it 0.2s for circuits under 32a and 1s for circuits over 32a

---------- Post Auto-Merged at 10:32 ---------- Previous post was made at 10:31 ----------

Tn's are 0.4s and 5s

 

[meerkat]

Hi Danny,

BGB page 53, 411.3.2.2 Final circuits < 32A 0.2 sec's

BGB page 54, 411.3.2.4 Disconnection time < 1 second is permitted for a distribution circuit and for a circuit not covered by Regulation 411.3.2.2

RCD used for Fault protection 411.5.3, disconnection time shall be that required by Regulation 411.3.2.2 or 411.3.2.4, and (Ra x In < or equal to 50 V)

HTH (MEERKAT)