Blowing arc extinguishing load switch
A load switch, blowing air arc extinguishing technology, applied in electrical switches, high voltage/high current switches, electrical components, etc., can solve the problems of short service life of load switches, increase manufacturing costs, affect the size of contact resistance, etc., to achieve opening and closing The effect of stable performance, increased docking error and large transfer current
Active Publication Date: 2014-10-01
GUANGDONG JINHUILONG SWITCH
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Problems solved by technology
The structure of the existing load switch is relatively complicated, which not only greatly enhances the difficulty of assembly, but also greatly increases the manufacturing cost
Moreover, due to the shortcomings in the structure of the load switch, the life of the existing load switch is relatively short, which requires frequent replacement of the load switch, which brings greater trouble to the maintenance and repair of high-voltage electrical appliances
In addition, the existing load switch requires high precision when opening and closing, and the error needs to be controlled within a very small range, and the axial error directly affects the size of the contact resistance, and in severe cases, it will cause failures that cannot be connected
Therefore, the breaking current of existing load switches is generally below 1600A, which greatly affects the breaking capacity and performance of existing load switches
Method used
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Embodiment Construction
[0027] Such as Figure 1-6 As shown, the gas blowing arc extinguishing load switch in this preferred embodiment includes a moving assembly 1 , a static assembly 2 , a lower contact cover gland 4 and a gland spring 5 .
[0028] The gas blowing arc extinguishing load switch adopts the plum blossom contact (patent No. ZL200710032387.9) which the applicant applied for patent earlier. The plum blossom contact includes plum blossom static contact 11, plum blossom moving contact conductive rod 3 and plum blossom contact The moving contact 8, the plum blossom moving contact conductive rod 3 is connected with one end of the plum blossom moving contact 8.
[0029] The plum blossom static contact 11 and the lower shielding cover 13 of the gas blowing arc extinguishing load switch are fixed on the lower contact cover 9 to form the static assembly 2 of the gas blowing arc extinguishing load switch. In this way, a reliable basis is provided for the entire blowing arc extinguishing load swi...
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The invention provides an air blowing arc extinguishing load switch, relating to an opening and closing part of a high voltage electric appliance. The switch comprises a moving assembly, a static assembly, a lower contact cover gland and a gland spring. The static assembly is formed by fixing a wabbler static contact and a lower shield cover on a lower contact cover, and the moving assembly is formed by a wabbler moving contact and an upper shield cover which are fixed on a conducting rod, an upper contact cover and a conducting rod position sleeve. The switch is characterized in that: the upper contact cover, the lower contact cover and the upper contact cover gland form enclosed space with a changeable volume. Compared with the prior art, the switch has the following advantages: a large butt joint error is allowed, and opening and closing performance is stable; the switch has high breaking capability; transfer current is large; a mechanical life is long; and the switch can work with zero gauge pressure.
Description
technical field [0001] The invention relates to an opening and closing part of a high-voltage electrical appliance, and more specifically relates to a gas-blowing arc-extinguishing load switch for a high-voltage electrical appliance. Background technique [0002] The load switch is a commonly used component in high-voltage electrical appliances, which is used to break the normal load current. The structure of the existing load switch is relatively complicated, which not only greatly enhances the difficulty of assembly, but also greatly increases the manufacturing cost. And because there are deficiencies in the structure of the load switch, the life of the existing load switch is relatively short, which requires frequent replacement of the load switch, which brings more trouble to the maintenance and repair of high-voltage electrical appliances. In addition, the existing load switch requires high precision when opening and closing, and the error needs to be controlled within...
Claims
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IPC IPC(8): H01H33/22H01H33/64
Inventor 吴鸿彬马明霞蔡兆鑫纪锐宏纪顺峰
Owner GUANGDONG JINHUILONG SWITCH