In compliance with standards, the entire engine shall be capable of operating within its rated characteristics up to a set ambient temperature of 40oC at altitudes up to 1000m above sea level.
For situations above the expressed, the rated power of the motor must be decreased. This is due to the fact that the motor ventilation is lower depending on the height and ambient temperature. The decrease in ventilation capacity, in turn, is due to the increased rarefaction of the air with the elevation of the altitude.
Besides these factors, it should be considered in the same way in the choice of the engine if they have special conditions in the environment where the engine will be applied such as dust, gases in suspension, sea air, danger of explosion, etc. In many situations it may be necessary to choose a specific type of engine, developed and manufactured to meet the needs of the environment.
A particular case is marine engines, which have a higher degree of protection, special paint, additional protection for cables in the junction box, etc. The cost of such engines is, however, higher than those of standard manufacturing. https://www.mrosupply.com/motors/ac-motors/general-purpose-motors/2840791_vel11319_baldor/

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