同步电动机的失电保护中ZCH和BZT的配合

大型同步电机是工业部门广泛采用的电气设备,其运行的安全性和连续性对于生产具有重大影响。在同步电动机断电保护中,通常采用ZCH和BZT装置,然而其配合与控制中存在断电失步问题,严重影响了企业生产的连续性、安全性及可靠性。在分析断电失步的故障及危害的基础上．阐述了断电失步的电力保护措施及具体的实施方法、步骤。对同步电动机断电失步保护中ZCH和BZT保护装置的继电保护设计有一定的指导作用。

Coordination of ZCH and BZT in Out-of-synchronism Protection for Synchronous Motor

Large-scale synchronous motors are the electric facilities used widely in industry, which have vital impact on manufacture process. The ZCH device and the BZT device are often used in power-off protection of synchronous motor. However, synchronism may lose during power-off in the coordination and control device, which severely influences enterprise's continuous, safe and reliable production. Based on the analyses to failure and danger of out-of-synchronism, the power protection measures and corresponding way and step are presented, which are helpful for guiding the coordination of the ZCH and the BZT device during the power-off protection.