Type-A RCD failing 180 degree ramp test

Former Community Member over 5 years ago

Hi

We are testing a type-A RCD (see image: "ABB") with a METREL MI 3152 (see image: "MI 3152 test").

As the image shows, the ramp test (I delta) is failing to trip the RCD for the negative half wave.

Have oneone seen this before?

Br Sebastian

attachments.zip

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0 Alcomax over 5 years ago

Not familiar with the tester, but after crooking my neck looking at the pic, it seems that it does indeed trip on the half cycle [29.6 mS], but at a test current >1.5 amps?

Again unfamiliar with the equipment, but as Sparkingchip asks...is this a ramp test? I suppose, given the In recorded on the positive test it could be a ramp test, but smack on 1 amp for that is a bit flukey and probably unlikely.

A Metral user's input is required I think.
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0 Alcomax over 5 years ago

Not familiar with the tester, but after crooking my neck looking at the pic, it seems that it does indeed trip on the half cycle [29.6 mS], but at a test current >1.5 amps?

Again unfamiliar with the equipment, but as Sparkingchip asks...is this a ramp test? I suppose, given the In recorded on the positive test it could be a ramp test, but smack on 1 amp for that is a bit flukey and probably unlikely.

A Metral user's input is required I think.
Cancel
Vote Up 0 Vote Down

Cancel

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Type-A RCD failing 180 degree ramp test

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