RCD Problem

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Hi all

Anyone got any thoughts on this....

TNS arrangement
ZE = 0.65 ohms
ZS on tested circuit 0.85ohms

RCD >1999 on 0.5 x

28 & 32 ish ms on 1 x

> 40 ms on 0 & 180 degs although the unit did pass on 0 degrees once or twice before failing the 180

Tested my Megger against a known good external RCD and changed batteries all to no
avail.

I haven't tested across the RCD directly as I didn't think to whilst on site but any suggestions would be most welcome.

The RCD is new as the old unit was giving 110ish ms on 1x and >40 ms on 5x so I assumed that it was this.

Thanks
CJ

 

[telectrix]

as you're getting probs with 2 different rcds, i would test with loads removed. then if test is ok, the loads arfe influencing the trip of the rcd,

sorry, substitue "circuits" for "loads"

 

[SPARTYKUS]

aH! Telextrix beat me!

 

[telectrix]

fastest finger first m8

 

[domestic spark]

hmmmmm

 

[domestic spark]

i had this same problem last week

 

[domestic spark]

appliances!

 

[telectrix]

yep, it's my truss.

 

[Spaced]

Superb, thanks everyone for your assistance, really very much appreciated.
I'll let you know how I get on tomorrow.

Thanks again.
CJ

 

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Re: RCD Problem - Sorted!

Hi everyone

Just a quick update. Tracked the problem down to a new Saniflo macerator!
Turned off the FCU and all good.

Thanks again for everyones input.

Regards

CJ