Time Delay RCDs a thing of the past?

[Clitheroe]

Would it be as good as to say that since these new boards (dual RCD) will suffice for TT systems?

I hope not since I have a Wylex split load CU with a TD RCD and I was thinking what if the RCD required replacing at some point?-I am not prepared to put the mains switch back and replace all MCBs on that side with RCBOs etc.

It was installed just four years ago.

Will they still be available?

Regards

 

[plugwash]

I imagine time delay RCDs will still remain availible. They will still be needed when a TT supply is feeding a submain for example.