protection switch

例句：

1. 1. The protection switch is used to prevent electrical fires in the factory.
   保护开关用于防止工厂的电气火灾。
2. 2. The engineer installed a new protection switch to improve safety in the workshop.
   工程师安装了一个新的保护开关，以提高车间的安全性。
3. 3. The protection switch is designed to detect and stop any potential hazards before they cause damage.
   保护开关被设计成在潜在危险造成损害之前检测并停止它们。