reverse over-current relay

例句：

1. 1.This relay is designed to reverse the current flow in a circuit.
   这个继电器设计用来在电路中反转电流流动。
2. 2. The relay was used to protect the electrical system from overloads.
   继电器被用来保护电气系统免受过载。
3. 3.The relay operated smoothly and did not cause any problems during testing.
   继电器运行平稳，测试过程中没有出现问题。