FORESEEING AND DETECTING METHOD FOR STARTING OF FIRE OF ROTARY ELECTRIC MACHINE

摘要

PURPOSE:To foresee and prevent the danger of the starting of the fire by previously applying a volatile substance evaporating at a temperature slightly higher than the maximum temperature reaching during rated operation to various positions of the forming section of the rotary electric machine and detecting the evaporation of the volatile substance. CONSTITUTION:The volatile substance is applied previously to a rotor 1, a stator 2 and a bearing 5. The substance evaporating at the temperature slightly higher than respective maximum temperature that each section reaches when the rotary electric machine is operated under a rating state is used as the volatile substance. When the temperature of the rotary electric machine exceeds the maximum temperature reaching during rated operation for some reasons and further rises and exceeds the evaporating temperature of the volatile substance in the rotary electric machine during operation, the volatile substance is rapidly evaporated, and carried by air flow paths 7, and detectors 8 detect the volatile substance. Accordingly, the rotary electric machine is stopped, protected and controlled. When a plural kinds of the volatile substances are used and a plural kinds of the detectors 8 detecting each volatile substance are employed, the position of generation of a fire starting main cause can easily be discriminated.