Discuss EUD12NPN-UC from Eltako Electronics installing in the UK Electrical Forum area at ElectriciansForums.net

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I was installing the EUD12NPN-UC for a friend and like your opinion on the following.

Before there was an Eltako impulse relay (Eltako S12-100-230V) for the corridor lights. Several light points and 3 impulse switches.

My friend asked me to help him remove the impulse relay and replace it with a dimmer (EUD12NPN-UC from Eltako Electronics) and as soon as I put it in and turned the fuse, the fuse it blew all the trip switches (2) in all the circuits too.

I wired it in as per diagram (see enclosed) and as soon as I flipped the fuse, it tripped both the trip switches. I did some checking and in the end found that if I only connect live and neutral (see diagram of the EUD12NPN-UC marked in red) to L and N on the EUD12NPN-UC the same thing happened.

My assumption is this thing is dead on arrival, or there is a minuscule leakage but that should not be. Am I right? Any experience with these units? Any tricks?

Thanks.

EUD12NPN-UC .png
 

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