What passport data is indicated on the shield of an asynchronous electric motor

Each engine is supplied with a technical data sheet as a riveted metal plate showing the main characteristics of the engine. The type of engine is indicated in the passport. For example, the motor type 4A10082UZ: asynchronous electric motor of the 4A series with a closed design with a rotation height of 100 mm, with a short body length, two-pole, climatic version U, category 3.

The serial number makes it possible to distinguish an electric machine among the same type.

Below are deciphered numbers and symbols as follows:

3 ~ — three-phase AC motor;

50 Hz — AC frequency (50 Hz) at which the motor must operate;

4.0 KW — nominal net power of the electric motor shaft;

cosine phi = 0.89 — Power factor;

220 / 380V, 13.6 / 7.8A - when connecting the stator winding to a delta, it must be connected to a voltage of 220 V, and when connected to a star - to a voltage of 380 V. In this case, a machine operating at nominal load, consumes 13.6 A when switching on a triangle and 7.8 A — when switching on a star;

S1 — the engine is designed for continuous operation;

2880 revolutions per minute — the rated speed of the electric motor load and mains frequency 50 Hz.

If the motor is idling, the rotor speed approaches the rotation frequency of the stator magnetic field;

efficiency = 86.5 ° / o — nominal coefficient of useful action of the engine, corresponding to the nominal load of its shaft;

IP44 — degree of protection. The engine is manufactured in moisture and frost resistance. It can work in high humidity environment and outdoors. The passport contains GOST, insulation class of the coil (for the class At the maximum permissible temperature 130 ° C), weight of the machine and year of release.