During the long operational time, the film insulation is exposed to the electrical, thermal and mechanical stresses, which will cause insulation degradation and lead to breakdown finally.

绝缘薄膜材料在长期的运行过程中，受到电、热、机械和环境因素的联合作用，其性能将因此逐渐变坏，并最终导致绝缘击穿。

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The heat fault of the electric equipment can cause insulation down and breakdown and makes the equipment damage, even gives rise to fires.

电气设备热故障会导致绝缘下降并击穿，使设备损坏，甚至引起火灾。

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This paper introduces a class H insulation system of shield motor. The new insulation system is better than of silicon in irradiation resistance, breakdown strength, mechanical properties and so on.

本文介绍了一种新型H级屏蔽电动机的绝缘体系，在耐辐照方面它大大优于有机硅绝缘体系。

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