传统零差保护均使用高阻继电器，高阻继电器有很高的避越不平衡电流的能力。

Traditionally REF adopts a high resistance relay with very high ability for overcoming the imbalance current.

youdao

传统零差保护均使用高阻继电器，高阻继电器有很高的避越不平衡电流的能力。

Traditionally REF adopts a high resistance relay with very high ability for overcoming the imbalance current.

youdao