ZS4

The testing terminal box ZS4 (four-wire conduit) is designed  for electrical devices where there is a need for changing or checking of a working measuring instrument (during switching  off of an electrometer connected to secondary circuits while  measuring current and voltage transformers) and where it is necessary to keep to the terms of uninterrupted secondary circuits of measuring current transformers.

The new testing terminal box supplements the previous model ZS1b.