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采用空气冷却的电机,在不同的海拔和环温下测得的温升也不同,为此标准中对温升限值作了修正的规定。近年来有些单位来信反映执行中的一些看法和意见。目前GB755—81《电机基本技术要求》正在进行修订,本文拟结合实际情况谈些看法。标准中对空冷电机各级绝缘所规定的温升限值是根据电机的额定运行条件:海拔不超过1000m,
The use of air-cooled motor, measured at different altitudes and ambient temperature temperature is also different, for which the standard temperature limit has been amended. In recent years, some units have written letters reflecting some of the views and opinions they have implemented. The current GB755-81 “basic technical requirements for motor” is being revised, this article to be combined with the actual situation to talk about some views. Standard air-cooled motors at all levels of insulation provided by the temperature rise limit is based on the rated operating conditions of the motor: not more than 1000m above sea level,