Motor heating and cooling. Classification of ED operation modes depending on the character of load change

EM is chosen in accordance with conditions of heating in the most cases, after that it is checked by overload ability.

And there is no need the heating mode of EM to correspond to heating rate temperature, that is low than allowable for the insulation class. On the contrary rated temperature is higher than the temperature of insulation class, but motor operation is finished before its temperature tends to the rated one.

Time of turning-off and time of turning-on depends on the changing load character of operated mechanism and technology process.

In any way choosing or correctance of EM consists of comparison the parameters of operation mode, that the motor was made for, with the parameters of the mode, that the EM is going to operate in the ED.

Published data are attributed to the specific rated mode and have rated data titles of the motor. Factory of origin guarantees full motor usage in the rated mode in the heating way.

For the producing EMs 8 rated modes are provided. They have symbolic notation S1-S8 inaccordance with international classification.

Дата добавления: 2014-01-05