AC electric motors of АK type with phase rotor are designed to drive mechanisms, which have heavy starting conditions and need speed adjustment.
These motors are rated for operation from AC network, 50 Hz, 6000 V and 3000 V. The motors for 3000 V are manufactured with the same overall dimensions as motors for 6000 V with the same power. Stator current of 3000 V motors is twice more than stator current of 6000 V motors.
Rated operating mode – continuous.
The motor is started at full network voltage with starting resistance going through the rotor circuit by a control station.
The electric motors can be delivered with the starting equipment of УПТФ type as complete units.
Constructive mounting arrangement – horizontal, on feet, with two panel bearings, with one free shaft end.
Protection degree of the motors – ІР23, of the outlet device of the stator – ІР55.
Way of cooling – self-ventilation.
The ventilation separating casing with windows (closed by shutters) for air going in or out can be installed in the top part of the frame.
Winding insulation materials of the stator and rotor belong to heat-resistance class “F” with temperature usage in accordance with class “B”.
Stator winding insulation is thermosetting, “Monolith-2” type.
Stator winding has six outlet ends fixed on four isolators in the terminal box.
Phase connecting circuit – “star”.
|Type of the motor||Power, kW||Rotational speed, rpm||Eff., %||cos φ||Mmax/Мnom||Rotor current, А||Rotor voltage, V|