AVR-RV Mine Flameproof Automatic Transfer Switch Devices

The AVR-RV Mine Flameproof Automatic Transfer Switch Devices are designed to supply alternating current power to Category I consumers or Category I special group consumers according to the Electrical Installation Code (PUE, 7th Edition), depending on the design version, in three-phase electrical networks with an isolated neutral (IT system).

General characteristics:

Explosion protection marking	PB Ex d I Mb; PB Ex d [ia Ma] I Mb*
Operating temperature, °C	from –20 to +40
Ingress protection rating	IP65 (IP66, IP67)**
Protection class against electric shock	I
Rated supply voltage, V	127 / 220 / 380 / 660
Maximum AC voltage, V	1000***
Maximum current, A	80***
Overall dimensions, mm	defined by configuration
Weight, kg	defined by configuration

* – explosion protection marking applies when Ex-components with intrinsically safe “ia” level circuits are present;

** – enclosure ingress protection rating is defined by configuration;

*** – the specified values represent the maximum permissible voltage and current within the framework of explosion protection. The operating range of these parameters in service is determined by the characteristics of the applied electrical equipment and cannot exceed the above values.

Application area

Underground mine workings, pits, and their surface structures, including those hazardous due to gas and/or dust, in accordance with the assigned explosion protection marking and industry safety regulations.