RCD operating times

[codger]

Hello. Just a quick query please lads.

Operating times for RCDs, (non-delay) on 100% of rated residual tripping current. Is the maximum operating time 300 or 200ms? Guidance Note 3 states 300ms, but various other publications say 200ms. I was under the impression it was 200ms.

Just trying to clarify.

Thanks

 

[Pete999]

Hello. Just a quick query please lads.

Operating times for RCDs, (non-delay) on 100% of rated residual tripping current. Is the maximum operating time 300 or 200ms? Guidance Note 3 states 300ms, but various other publications say 200ms. I was under the impression it was 200ms.

Just trying to clarify.

Thanks

On Site Guide page112 11.2, 11.3

 

[Risteard]

Depends on whether it is a BS EN type (300mS) or an older BS type (200mS).

 

[The Ghost]

The Beama handbook has it as 300ms, hopefully it uploaded! And table 3A pg. 318 agrees in BS7671

 

[PEG]

EN = extra number

 

[Andy78]

As Risteard says, used to be 200ms, is now 300ms, but older devices should still be tested to 200ms value.

 

[codger]

The Beama handbook has it as 300ms, hopefully it uploaded! And table 3A pg. 318 agrees in BS7671

Thanks for that.

 

[telectrix]

300mS for TN systems. 200mS for TT.