FH1 series auxiliary switch is our company on the basis of FH series auxiliary switch, in order to cope with the trend of miniaturization of complete sets of high voltage equipment developed products, its appearance is more beautiful and compact, reduce the installation space of the switch, suitable for controlling various high voltage switch operating mechanism of the closing, opening, interlocking, signal circuit, can also be used as a conversion or combination switch. It is more suitable for GIS combined electric mechanism and other operating mechanisms with small internal space.