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Is it possible to connect the Acti9 range of iDPN-N Vigi with L-L 220V ( 2 phase) system.

The iDPN offer is only compliant with L+N networks, they are not L+L => 2P devices. So it is not advise to use this iDPN-N vigi on L+L network. 
In fact the neutral is not protected in case of fault in this Vigi offer. The neutral side is only a switch and there is no thermal and magnetic protection in neutral side of iDPN-N vigi. Thawhy it  not advise to use  iDPN-N vigi on L+L ( 2 phase) network. 
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