How are the alphabetic and numerical designations of the 4A series asynchronous electric motors deciphered?

Letters and numbers denoting the engine brand are deciphered as follows:

the initial digit indicates the serial number of the series — 4; the next letter after the number (A) indicates the type of motor — asynchronous;

the second letter is the version of the motor according to the method of protection against the environment (N — protected IP23, for closed motors the letter is not attached);

the third letter is the version of the engine according to the material of the bed and shields (A — aluminum frame and shields; X — aluminum frame, shields — cast iron; the absence of a letter means that the frame and shields are cast iron or steel);

three or two following digits — the height of the axis of rotation in mm from 50 to 365;

following letters — assembly dimensions along the length of the bed (S — short, M — medium, L — long).

For motors with the same frame length, but with different stator core lengths, additional core designations are used: A — short, B — long.

Subsequent numbers — 2, 4, 6, 8, 10, 12 — the number of poles;

the final letters and numbers indicate the climate version and accommodation category.

So, the brand 4AN180M2UZ means that it is a three-phase squirrel-cage induction motor in the fourth series, protected design, with a base and shields of cast iron, with a height of the rotating axis of 180 mm, with a mounting size along the length of the bed M, two-pole, climatic version U , category 3.