The principles of hardware and software for the protection of high-voltage electromotor in quick break, inverse-time-limit and single-phase grounding are discussed with a presentation on the eatablishment of the mathematics model.

• 摘要阐述了微机对高压电机的速断、反时限以及单相接地保护的硬件和软件原理，并对其数学模型的建立进行了讨论。