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Primetest 250 RCD test results

PostPosted: Sun Sep 23, 2012 6:22 pm
by cpjelectrics
I have been testing 4 extension leads with RCD plugs installed. On all of them I received high readings for a 30mA trip on both sides of the sine wave (0deg & 180deg). A couple were over 200ms so considered a fail. I became suspicious about this so I tested the same RCD plugs using my Meggar 1720 and had totally different results. With the Megger all were in the <20ms results hence acceptable.

My test setup with the Primetest 250 was :-

Connect portable RCD plug to a power socket
Connect Primetest 250 to extension lead with the mains inlet socket

ie as per the manual

Have I carried out the test incorrectly ?

Re: Primetest 250 RCD test results

PostPosted: Thu Oct 04, 2012 4:34 pm
by jonathan
You may want to check the voltage used for the test, if that is configurable, as on my PT250 I need to set the voltage to 250 when testing surge-protected 4-way extensions; they don't always fail if I forget and leave it at 500v, but half of them will only pass when it is set to 250v.

Re: Primetest 250 RCD test results

PostPosted: Thu Oct 04, 2012 11:08 pm
by Grizzly
jonathan: surely you're talking about IR test settings?
The OP is talking about the RCD test. The IR test voltage should have no bearing on the RCD test.