Product Introduction
The FH series auxiliary switch is one of the supporting components for high-voltage complete sets of equipment, integrating the characteristics of both auxiliary switches and transfer switches. Compared with traditional auxiliary switches, the contact Angle control of the FH series auxiliary switches is more flexible, and through different combinations, it can meet more diverse control requirements of customers. Compared with manually operated changeover switches, the FH series auxiliary switches are more convenient to connect with the actual operating mechanism, facilitating mechanical transmission control. It is suitable for 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.
The FH series auxiliary switches are composed of multiple units with the same structure. Both the moving and fixed contact pieces are made of pure copper, the contacts are made of silver alloy composite contacts, and the shell is made of high-quality flame-retardant high-strength nylon, which has good insulation performance, reasonable structure and good dust-proof performance.
Switch selection
8K8B、10K10B、20K20B、28K28B、30K30B
Application equipment
Three-station mechanism
Environmental conditions
1、Ambient air temperature: -40℃ to +70℃;
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 FH series auxiliary switch adopts an indirect drive structure. It rotates the square shaft to drive the CAM, and then the CAM pushes the switch connecting rod, causing the moving contact piece to move, thereby achieving connection or disconnection to control the electrical circuit.
Switch structure
CAM structure
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