Automatic switches АВД

They are intended for protection of electric installations of short - circuit flux and also for operative inclusions and switching-off of electric chains at normal operating modes in three-phase electric networks of alternate current by frequency 50 Hz with the insulated neutral, at their installation in developments of the mining, hazardous gas (methane) and coal dust.

These switches provide protection: zero, from currents short circuits, blocking at reduction resistance of isolation of effluent current, disruption of control at short circuit or a wire breakage of remote switching-off.