相平衡电流继电器的英文

• phase-balance current relay

• 相位平衡电流继电器:    phase balance current relay
• 电流继电器:    curl relay; electrical current relay
• 差动平衡式电流继电器:    current balance type current differential relay
• 低电流继电器:    under current relay; undercurrent relay
• 过电流继电器:    maximum relay; over current relay，ocr; overcurrent relay