Isolating transformers according to EN 61558-2-4, double insulated, in a solid portable metal enclosure (metal-clad transformer of protection class II). Conditionally short-cicuit-proff due to a built-in avercurrent protection device operable from outside.
On the input side the appliance is provided with an exchangeable 2.5 m mains cable, with a tapered from plug (up to TT2.3 as from TT2.8 CEE plugs) plastic cable inlet with pull relief and kink protection; on the output side one or several sockets with hinged lid (schockproof or CEE).