?去磁继电器

... field regulator 场强调整器，漏磁变阻器 field removal relay 去磁继电器 field resistance 漏磁回路电阻，漏磁绕组电阻，励磁电阻 ...

?励磁撤出继电器

field removal relay 励磁撤出继电器 field under current relay 场欠流继电器 ..