Handle Switch QSA63-125 is a control component for disconnector fuse group. It is widely used in electrical equipment such as distribution cabinets and is used to manually operate the disconnector opening and closing actions. The handle switch QSA63-125 is a matching component of the HH15 series disconnector fuse group and is suitable for disconnector fuse groups with rated currents of 63A and 125A. The handle adopts a front rotation operation mode and consists of an operating mechanism, a contact system, a handle, etc. It has a fully enclosed structure to ensure the safety of operators and equipment.

1. Structural features of handle switch QSA63-125

- Fully enclosed structure: The static contacts and arc extinguishing system are assembled in a housing made of a new type of arc-resistant engineering plastic to ensure the safety of operators and equipment.

- Fast operating mechanism: The speed of switch closing and disconnecting is independent of the operator’s action speed, ensuring the reliability and safety of operation.

- Unique contact system: The moving contact system consists of four copper rollers with compression springs. Each roller can roll independently, effectively preventing contact welding.

- Handle and door interlock: The operating handle can be installed on the switch cabinet door. When the cabinet door is closed, the handle is wedged with the switch lever. When the switch is in the closed position, the handle is interlocked with the cabinet door to prevent the cabinet door from opening.

2. Installation and use of handle switch QSA63-125

Installation conditions:

- The ambient air temperature is not higher than +40℃ and not lower than -5℃.

- The altitude of the installation site does not exceed 2000 meters.

- Humidity: When the maximum temperature is +40℃, the relative humidity of the air does not exceed 50%. At lower temperatures, higher relative humidity can be allowed, such as 90% at 20℃. Appropriate measures should be taken for occasional condensation caused by temperature changes.

- The surrounding pollution level is level 3.

- The switch should be installed in a place without significant shaking, impact vibration, wind and snow, and there should be no gas and dust in the medium that is sufficient to corrode metal and damage insulation.

Precautions for use:

- The handle switch QSA63-125 should be checked regularly to ensure that it is flexible and reliable.

- During operation, avoid using excessive force to avoid damaging the operating mechanism.

- Clean the handle and switch surface regularly to prevent dust and dirt from affecting the operating performance.

The handle switch QSA63-125 plays an important role in electrical equipment. Through its fully enclosed structure and quick operating mechanism, it ensures the reliability and safety of operation. Its unique contact system and the interlocking design of the handle and the cabinet door further improve the operating safety and maintenance convenience of the equipment. Correct installation and use of the switch handle can effectively improve the operating efficiency and safety of electrical equipment.

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