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High-voltage motor differential protection device

Zhejiang Kening Motor Co.,Ltd | Updated: May 13, 2016

Generator differential protection device of high voltage motor through at both ends same direction, equal current is called going through current and current called a cross-current in the opposite direction. As the primary protection, percentage restraint differential protection of generator is based on non-cross current as, through current as a brake, to distinguish protected elements of normalcy, failed State and non-functioning State. Beijing surrogate runs through the current to load current, theory of non-through current is zero. Internal interphase short-circuit condition, non-cross current surge. When an external fault, through the current surge. In all three States, protecting sensitive internal interphase short-circuit State exports, so as to achieve the objective of protection, while in normal operation and reliable External fault without action.