Explosion-proof electric motors VA and VRA series:
The VA series electric motors are intended for driving mechanisms in oil-producing, gas and chemical industries with the degree of explosion protection 1ExdllBT4 / 2ExdllCT4.
The VRA (mine) electric motors are designed for coal and slate mines, which are dangerous because of gas (mathane) and coal (slate) dust with the degree of explosion protection PB3B.
