Asynchronous three-phase motor of АКНЗ series with phase rotor is designed to drive mechanisms with heavy starting conditions and mechanisms with adjustment of rotational speed (hoisting towers, band conveyers, mills and so forth).


Operational mode of the motors – continuous S1. Motors enable operation in intermittent mode with frequent starts, if mean square value of power isn’t over its rated meaning.

Protection degree of the motor –  ІР44, terminal box – ІР55.

Constructive mounting arrangement of the motors – IМ1101 (with cylindrical shaft end) by GOST 2479-79.

Cooling way – ІСА37 (closed construction with forced ventilation) by GOST 20459-87.

Climatic construction and allocation category – У3 by GOST 15150-69.

The motors are manufactured with frictionless bearings with consistent grease.
The motors are made with right sense of rotation and enable left sense of rotation. Sense of rotation can be changed only in rest state by switching stator windings.

Insulation of stator and rotor winding is thermosetting of “Monolith – 2” type of class of thermal classification «F».
Stator winding has 6 terminals brought to the terminal box and fixed on four insulators. Rotor winding has 3 outlet ends brought to the brush device. Connection of phases of stator and rotor windings is “star”.

The resistance thermal converters (TС) with nonlinear static characteristic 100P are installed to control temperature of the bearings and stator winding: one TС per one bearing unit, 6 TС for the winding and 3 for the stator core.
Terminal boxes of the stator and TС are placed on the right side, if you see from side of the working shaft end.

The motor designation is decoded as follows:


А – asynchronous
К – with contact rings
Н – «normal», that is basic version by kind of mounting and  degree of protection
З – closed construction of the motor
2,4 – Sequence of series developed
ХХ – Motor frame (that is  symbolic notation of the outer diameter of the stator core)
ХХ – Length of the stator core, cm
ХХ – Number of stator winding poles
Х – Climatic version
Х – Allocation category

Technical data:

Motor type Power, kW Voltage, V Rated rotational speed, rpm Eff., % cos φ Мmaxnom
АКНЗ-2-15-57-8У3 800 6000 741 95,1 0,86 2,3
АКНЗ-2-15-69-8У3 1000 95,1 0,87 2,3
АКНЗ-4-15-57-8У3 1000 95,0 0,87 1,9
АКНЗ-4-15-45-10У3 630 591 94,2 0,83 1,75