Product Introduction
The FK series auxiliary switch is one of the supporting components for high-voltage complete sets of equipment. It is a new type of auxiliary switch developed in response to the current usage requirements of auxiliary switches in the power industry. Compared with the commonly used F6, F9 and other auxiliary switches, its Angle control is more flexible and can achieve various special on-off switching. Compared with F10, the contact capacity of the auxiliary switch has more than doubled, which can better meet the high current requirements of the high-voltage switch industry. It is more widely applicable to controlling the closing, opening, interlocking and signal circuits of various high-voltage switch operating mechanisms, and can also be used as a conversion or combination switch.
Application equipment
Electric mechanism, hydraulic mechanism, disc spring mechanism, quick grounding mechanism, spring mechanism
Environmental conditions
1、Ambient air temperature: -55℃ to +80℃;
2. Altitude: No more than 5,000 meters;
3. Humidity: The average relative humidity within 24 hours shall not exceed 95%. The average pressure of water vapor does not exceed 2.2kPa. The monthly average relative humidity shall not exceed 90%. The average pressure of water vapor does not exceed 1.8kPa.
4. The vibration acceleration shall not exceed 15m/s².
5. The surrounding air is not obviously polluted by dust, smoke, corrosive or flammable gases
Working principle
The FK series auxiliary switch adopts an indirect drive structure. It rotates the square shaft to drive the moving contact, causing the moving contact to slide into and out of the fixed contact piece, thereby achieving connection or disconnection to control the electrical circuit. For the spring transient type, the spring stores energy in the first half of the opening and closing process and releases it quickly in the second half to open and close.
Switch structure
The 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 head is made of silver alloy, the fixed contact piece is made of copper plated with silver, and the insulating piece is made of imported high-quality flame-retardant and high-temperature resistant materials, which have high strength, good insulation performance, reasonable structure and good dust-proof performance. The external connection methods of auxiliary switches can be divided into two forms: crimping and plug-in. The structural forms can be divided into three forms: single-head single-side output, double-head single-side output, and double-head double-side output. The terminal blocks can be combined arbitrarily. Single-head contacts and double-head contacts can be mixed and used in the same switch. The number of normally open contacts and normally closed contacts can be combined arbitrarily. The opening and closing coupling methods include direct connection type and spring transient type. The above forms, number of stages and on-off angles can be selected according to the customer's requirements and will surely meet the user's needs.
Wiring method
Insertion and crimping
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