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 mapj1 over 5 years ago

yes that is a "ramp test" to the older hands among us.

If you can please re-test, lying to the meter that it is an AC type, and also verify that all phase to phase voltages are similar.

how is the meter connected - how are you choosing the phases to test - your diagram may imply live no1 and earth ,

does it work if you shuffle them and use say L3 and earth ?

Is this the only RCD of its type you have tested with this meter, or has another one tested OK?

What is the NE voltage, and where is the NE bond ?
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0 mapj1 over 5 years ago

yes that is a "ramp test" to the older hands among us.

If you can please re-test, lying to the meter that it is an AC type, and also verify that all phase to phase voltages are similar.

how is the meter connected - how are you choosing the phases to test - your diagram may imply live no1 and earth ,

does it work if you shuffle them and use say L3 and earth ?

Is this the only RCD of its type you have tested with this meter, or has another one tested OK?

What is the NE voltage, and where is the NE bond ?
Cancel
Vote Up 0 Vote Down

Cancel

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Type-A RCD failing 180 degree ramp test

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