LFE series auxiliary switch is one of the auxiliary components of high voltage equipment, which is suitable for controlling the closing, opening, interlocking and signal loop of various high voltage switch operating mechanisms, and can also be used as a conversion or combination switch. Its large-capacity on-off capability effectively overcomes the defects of other auxiliary switches with limited capacity and low contact life, and significantly prolongs the service life of the product, making it an effective substitute for other similar auxiliary switches.