RCD trip time greater than 300ms

[Bradley6969]

Got sent this, RCD Failed x1 greater than 300ms maybe if they changed the supply at top of RCD, currently have neutral on the left and line in the right , also the RCD is fed from 63Amp MCB is that all good just feeding an RCBO 30ma board

 

[telectrix]

that's a time delay RCD. and MK RCDs are generally L on right.

 

[Bradley6969]

that's a time delay RCD. and MK RCDs are generally L on right.

Yes, should still trip within 300ms X1 possibly cause the L wants to be on the other side?

 

[telectrix]

read mylast post.MK RCDs are normaally that way round.

 

[telectrix]

read here:

https://---------------/forums/forum/messageview.cfm?catid=205&threadid=42247

 

[littlespark]

It doesn’t like being in beside an ABB. and I’m guessing the one on the left isn’t an MK either

 

[Wilko]

Hi - does it trip on the test button or when ramped?
Just FYI, Table 3A has the range of values for 100mA RCDs (and others), non-delayed up to 300ms and S up to 500ms.

 

[DPG]

Who sent you the picture? What was the reason for their visit?

 

[Bradley6969]

Hi guys, my mate sent me it and it’s an upfront RCD for DB in a farm yard (TT) he went through how he tested it as he has brand new tester (Martindale) a similar version to mine and he didn’t flick through the settings and put S which is time delayed, hence why it was saying failed X1 eventually tripped at 310ms so all good

 

[DPG]

At least your friend knows for next time.

 

[DPG]

Is it the same friend who had problems with RCD testing/trip times a while ago?

 

[Bradley6969]

Yes friend

 

[telectrix]

imaginary friend?

 

[DPG]

RCD friend.

 

[MJPD29]

Why does your friend test Rcds most of mine don't even know what they are

 

[Taylortwocities]

You should stop associating with plasterers and plumbers then

 

[static zap]

imaginary friend?

--Imaginary Results--

My friend does not believe his Fluke when it says ...
Trip time = 0mS
a) (An expensive RCD that does not obey laws of Physics !)
b) ... Grabbing figures from a limited list ... For consistency
(Finger problems -as per OP's-friend)

 

[Wilko]

My record is 6ms.
To be clear, that’s RCD trip times I’m talking about.

 

[Zdb]