RCD Testing

[the__apprentice]

When RCD testing you test at different values

So you'd test at x0.5, x1 and x5 correct?

at x 0.5 the rcd should not trip
at x 1 the rcd should trip in less the 200ms
at x 5 the rcd should trip in less then 40 ms

this is from memory as I dont have my osg on me until thursday can someon confirm the times please.

 

[rlc]

For general purpose RCD's i.e non delayed RCD's your figures are correct as I understand in providing supplementary protection against direct contact.

The 5x test - where the device is intended to provide supplementary protection against direct contact, a test current of 150mA, applied for no longer than 50mS should cause the device to operate within 40mS.

You must take readings on both the positive and negative half cycles of the supply and record the highest and you should also check the operation of the test facility.

I did note that Spark123 commented in an earlier thread ref RCD trip times:

"Thats fine, as long as it is less than 300ms for a 61008/9 device its fine."

tho not sure why 300mS?

~rlc

 

[holmslaw]

..

 

[davelx]

300ms = 5secs, tripping time for a fixed appliance.

er ---- I don't think so.

300ms = 0.3 seconds.

5 secs = 5000ms

 

[holmslaw]

..

 

[THRIPSTER]

I should go to the maths book shop whilst you are out.

 

[ColJack]

he's tried on several occasions, but the advert in the yellow pages says...

"New shop opened at 12+13, the high street... "

it's actually one big shop spanning 2 addresses, but he keeps going to number 25... can't find it...

 

[Spark123]

I did note that Spark123 commented in an earlier thread ref RCD trip times:

"Thats fine, as long as it is less than 300ms for a 61008/9 device its fine."

tho not sure why 300mS?

~rlc

The spec given in the OSG and GN3 for a BS EN 61008 or BS EN 61009 standard RCD at I/\n is it must trip within 300ms.
The spec for a BS 4293 standard RCD at I/\n is it must trip within 200ms.
Both must trip within 40ms at 5 I/\n.