max Zs for delayed RCD's

[rasell]

The regs give a table for non delayed RCD's and circuits under 32A, how do you calculate max Zs if there is a delayed RCD or if the circuit is over 32A?

 

[roukel01]

A 30mA time delayed RCD still trips with a fault current of 30mA it just takes a little longer and so Zs on a 30mA RCD is 1667 ohms

Table 41.6 (page 54) gives circuits up and including 125A and also a formula for anything over that.