Do you really understand FK series auxiliary switches?
Release time:2023-09-12

The FK series auxiliary switch is one of the supporting components of high-voltage complete equipment. It is a new type of auxiliary switch developed in response to the current demand for auxiliary switches in the power industry. Compared with the commonly used auxiliary switches such as F6 and F9, its angle control is more It is flexible and can realize various special opening and closing switching; compared with the F10 auxiliary switch, the contact capacity has more than doubled, and it can better meet the high current needs of the high-voltage switch industry. It is more widely used to control the closing, opening, interlocking and signal circuits of various high-voltage switch operating mechanisms. It can also be used as a conversion or combination switch.

Structural features of FK series auxiliary switches
FK series auxiliary switches are composed of multiple units with the same structure. The moving contact piece is made of high-quality phosphor bronze, the contact piece is made of silver alloy, the fixed contact piece is made of silver-plated copper, and the insulating piece is made of imported high-quality flame-retardant and high-temperature resistant materials, with high strength, good insulation performance, reasonable structure and good dustproofness. The external connection method of the auxiliary switch can be divided into two forms: crimping and plugging. The structural form can be divided into three forms: single-head single-side outlet, double-head single-side outlet, and double-head double-side outlet. The terminal blocks can be combined in any way. Single-head Contacts and double-ended contacts can be mixed in the same switch, and the number of normally open contacts and normally closed contacts can be combined in any way. The opening and closing coupling modes include direct connection type and spring snap-action type. The above forms, series, and on-off angles can be selected according to customer requirements, which will surely meet user needs.
Working principle of FK series auxiliary switch
The FK series auxiliary switch has an indirect driven structure. The square shaft rotates to drive the movable contact, so that the movable contact slides in and out of the fixed contact piece to achieve connection or disconnection to control the electrical circuit. For the spring instant-action type, the opening and closing The spring stores energy in the first half of the gate, and releases the spring in the second half to quickly open and close.