English to Russian Tech/Engineering Electronics / Elect Eng

Three-phase a.c. motors, for example frequency converter-controlled motors or high voltage asynchronous machines require the use of wire wrappings which satisfy the stringent requirements in respect of thermal endurance and mechanical properties, mainly the flexural strength of the insulation layer, in order to be able to withstand high voltage loads and ***pulse-shaped voltage loads*** without damage. Furthermore, especially thermal resistance is of high importance as such motors have high temperatures of operation. A further requirement in respect of wire wrappings of electrical equipment is the partial discharge resistance of the wire coatings.

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