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Can the Acti9 4P RCD and RCCB be used on three-phase network, without the neutral distributed?

The Acti 9 four-pole residual current devices can be used normally on three-phase circuits without neutral. For three-phase circuits the terminals 1-2, 3-4, 5-6 have to be connected, leaving the N neutral terminal unconnected.
The "Test" button is connected between 2 phases and the absence of the neutral will not influence the test function.

Illustration of the "Test" button connection:
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