Automatic back-up input device AVR ?? (mine normal version)

A automatic standby input device AVR PH, in mine normal version with insulation level PH1, designed to provide uninterrupted power supply to consumers (automation devices, signalling and lighting) in underground mine workings of mines and mines, non-hazardous by gas or dust, according to the marking, GOST 24754-2013, GOST 30852.20-2002, by automatic connection of a backup power supply source when the working one is switched off and automatic restoration of the original power supply scheme when the working power supply source is restored. ATS is connected to power supply schemes with nominal operating voltages of main and backup AC circuits of 380 or 660 V. ATS can be additionally equipped with the following devices:- Module of galvanic isolation with insulation control TIS 36.9.9.00.000;- Automatic protection device - automatic switch UAZ-VA TIS 37.4.0.00.000.