保护继电器 [电] protective relay ; [电] keep relay ; BHJ ; CSPC

保持继电器 holding relay ; stick relay ; Lockout relay ; keep relay

电动机保护继电器 motor protection relay ; SPEM

断相保护继电器 phase failure relay

差动保护继电器 differential protection relay

自保持继电器 lock-up relay ; seal-in relay ; [电] latching relay

热保护继电器 thermoprotection relay

磁场保护继电器 field protective relay

轴承过热保护继电器 bearing over-heat protective relay

磁保持继电器 [电] magnetic latching relay ; Latching Relay ; High Power Latching Relay