They are intended for ventilation of deadlock mountain built in explosion-proof demolition workings in coal and ore mines including dangerous on gas and dust mines at density of air up to 1,3 kg / m3, temperature from a minus 20 ° С to plus 35 ° С, dust content to 50 mg / m3 and relative humidity up to 95% (at a temperature of plus 25 ° C).
They are intended for protection of electric installations of outflows of a short circuit and also for operative switching on and switching off of electric circuits at normal modes of operation in three-phase electric networks of an alternating current with the isolated neutral at their installation in developments of the coal mines dangerous on gas (methane) and (or) coal dust.
Automatic switches AVM-DU1 and AVM-630DU2 provide the possibility of an operative remote switching on and off from the control panel.
In addition the AVM-630DU2 switches have the capability of operative remote switching on and off from the dispatcher's console by connecting to monitoring and dispatching networks as well as remote check of the leakage relay operation.
In switches DO, P it is used an automatic switch A3792
In switches DU it is used an automatic vacuum circuit-breaker with an electric platoon.
In automatic circuit breakers it is applied AVM-R, PMZ-M, BKI-M blocks.
In automatic switches ABM-DO, AVM-DU1 it is applied BDU-M, PMZ-M, BKI-M blocks
In the AVM-630DU2 circuit-breakers it is used the microprocessor BZU-2block.
Blocks PMZ-M, BKI-M, BDU-M are interchangeable with blocks of BDU, PMZ, BKI.
In the construction of explosion-proof electric motors rotors of ECB type it is used rods in a rotor winding which are made of copper and brazed with copper short-circuiting rings.
Electric motors with such rotors have higher overload capacity, the efficiency increased due to reduction of losses in the copper rotor and energy saving.
A special feature of the EDCOF rotor construction is the rotor cell winding made of brass (upper cell) and copper (bottom cell) rods which are welded to copper short-circuiting rings. In such a design of the rotor winding the melting of the rods is eliminated in abnormal operating modes of the electric motor (frequent starts, overloads, load surges).
The sheets of active iron of the stator or rotor are made of electrical steel of 0,5-P-ShS-1-TO-Tsh-A-2212 grade GOST 2 1 4 2 7 2 - 8 3 for electric motors of the types: EDKVB, EKV, EDKO, BPM, VAO-2, DRT, and others.
The production of sheets is carried out by stamping with the use of KD-232E, KD-2122, KD-2318, KE-2330presses, etc.
They are designed to remote control of the switching on and off of three-phase asynchronous squirrel-cage induction motors. Besides that, they are produced for operations in networks with an isolated neutral of the transformer which are installed in coal mines that are dangerous for gas and coal dust. What is more they can be used for protection against short-circuit and overload currents in outgoing power circuits and insulation control of outgoing connections.
Starters are designed to work in the following conditions:
Main technical parameters of starters
Production of cargo trolleys VG, UGG of all sizes
They are intended for transportation of rock mass and cargoes that do not protrude beyond the dimensions of the trolley along underground horizontal and inclined (with an angle of up to 18 °) workings as well as at industrial areas of coal mines including hazardous of gas and dust which are equipped with rail track with rails type P24 or P33 (34) laid on wooden or reinforced concrete sleepers.