Electric motors 4СД-215-3150-16 УХЛ4 and СД4-3150-16 УХЛ4 are designed to drive rotary soil pumps of 2ГрТ8000/71 or 28ГР8 types and pumps GHPP 28-24 UY, which are used to pump abrasive hydromixtures at ore mining and processing enterprises.
Instead of motors 2СД-215-3150-16, new motors 4СД-215-3150-16 or SD4-3150-16 can be mounted on the base plate of the old motor, which the customer has, not changing the casing and not dismantling the old plate.
The motors are designed with application more reliable modern electrotechnical and insulating materials and technologies allowing to improve service characteristics of electric motors and reliability of insulation of their windings, that prolongs life of the motor.
Motors are rated for operation in continuous mode S1 by GOST 183 from AC network, 50 Hz, with voltage 6000 V, power factor cos φ=0,9 (leading).
Design of the motors by degree of protection of the case – IP21 (GOST17494); by climatic version and installation category – УХЛ4 (GOST15150).
The motors are cooled in self-ventilation – ICA01(GOST 20459).
Environment is not inflammable, not explosive; it is free from aggressive gases and vapours, and it meets atmosphere type II by GOST 15150. Concentration of inert dust – no more than 2 mg/m3.
Insulation of stator and rotor windings belongs to heat-resistance class not lower than “F” class.
The thyristor exciters energize the motors.
Design of the motors by mounting arrangement:
4СД-215-3150-16 – IM7315 by GOST 2479 (fig. 13): on base plate, with two pedestal plain bearings with combined lubrication, with two thrust plates, on raised feet, with one flange shaft end;
IM7315 by GOST 2479 (fig.14): on base plate, with two pedestal plain bearings with combined lubrication (without thrust plates), on raised feet, with one flange shaft end (thus, insulated bearing on side of contact rings has fitting dimensions of similar thrust bearings of motors 2СД-215-3150-16 УХЛ4 and СДУ-18-54-16 УХЛ4);
IM7311 by GOST 2479 (fig.15): on base plate, with two pedestal plain bearings with combined lubrication (without thrust plates), on raised feet, with one cylindrical shaft end;
The motors have left sense of rotation (counter-clockwise, if you see on output shaft end side).
Motors 4SD-215-3150-16 are made with following plain bearings:
• The bearing on drive mechanism side – КПК 300×300-600, of pedestal type, demountable, with liquid combined lubrication.
• The bearing on contact rings side – КПК 300×300-600, of pedestal type, demountable, isolated, with liquid combined lubrication and with two thrust plates (one of them is rated for axial load 450 kN directed towards the pump; and the second is rated for axial load 120 kN, vectored to the opposite side).
СД4-3150-16 motors are also made with isolated bearing КПК 300×300-600 (on contact rings side), but without two thrust plates (to make motor service and installation easier), and they are designed to be coupled with pumps which do not transfer axial efforts to bearing supports of the motor (pumps of type GHPP 28-24 UY made by the firm “WARMAN”).
The stator winding has 12 outlet ends (each parallel phase branch of stator winding is brought out by separate wires). The outlet ends of stator winding may be in the terminal box or may be brought downwards, in a base hole. At s customer’s agreement, the terminal box may be installed on the right or the left side on the stator case (it’s stipulated in the order).
|Type of the motor||Mounting construction (GOST 2479)||Power, kW||Voltage, kV||Stator current, А||Rotational speed, rpm||Startup characteristics||Rotor voltage, V||Rotor current, А||Eff., %||Weight, kg|