微机保护装置在低压框架式低压断路器上的应用

Application of Microcomputer Protection Device on Low-voltage FrameType Low-voltage Circuit Breaker

介绍了框架式低压断路器的保护及工作原理,结合保护装置故障后失去线路保护功能,采用微机保护装置实现低压受电线路的保护功能,通过对定值的重新核算和试验,保证低压受电断路器运行的稳定性及保护的可靠性。

This article introduces the protection and working principle of frame type low-voltage circuit breakers,combined with the loss of line protection function after the fail⁃ure of the protection device and the use of microcomputer protection devices to achieve the protection function of low-voltage receiving lines.Through the re-accounting and testing of the fixed value,the stability of the operation of the low-voltage receiving circuit breaker and the reliability of the protection are ensured.