Voltmeters with switch measuring phase and line voltages

Analog panel voltmeters with a phase switch are designed for use in three-phase networks. In terms of dimensions, they are no different from conventional single-phase devices, but thanks to the built-in switch, one voltmeter can measure 6 voltages (3 phase-to-neutral voltages and 3 between phases).
ETC "Joule" produces voltmeters with a switch in two standard sizes - 72x72 and 96x96 mm.
ETC "Joule" analog voltmeters are included in the Registry of measuring instruments of the Russian Federation under No. 61894-15 and are approved for verification in accredited testing laboratories using standard methods