低压电网短路保护装置级间动作时限配合

The Time Limit Cooperation for the Short Circuit Protection Device Inter Stage Action of Low-voltage Power Grid

断路器、熔断器是低压电网的主要保护装置,保护装置级间动作时限的配合直接影响企业用电负荷供电可靠性。分析低压电网短路保护装置级间动作时限配合,有利益提高保护装置的动作选择性及电网的供电可靠性、减小电网停电范围。

Circuit breakers and fuses are the main protection device of low-voltage grid. The time limit cooperation of the protective device inter stage actions directly affect the electricity load power supply reliability. Analyzing the time limit cooperation of the protective device inter stage actions is beneficial to improve the protection device action selectivity and power grid reliability, reduce outage range.