A t-shaped symmetrical double helix self-excited magnetic blowing arc extinguishing device
A magnetic blowout and double helix technology, which is applied to the protection switch operation/release mechanism, electrical components, electric switches, etc., can solve the problems of poor breaking capacity and poor arc blowing effect of DC fast circuit breakers
Active Publication Date: 2021-07-06
杭州德睿达电气有限公司
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- Application Information
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Problems solved by technology
[0009] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a T-shaped symmetrical double-helix self-excited magnetic blowout arc that can solve the problems of poor breaking capacity and poor arc blowing effect of the DC fast circuit breaker in the prior art device
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[0032] The present invention will be further described below in conjunction with accompanying drawing:
[0033] Such as figure 1 As shown, it is a schematic structural diagram of a T-shaped symmetrical double-helix self-excited magnetic blowout device.
[0034] The T-shaped symmetrical double-helix self-excited magnetic blowout device of the present invention includes a relatively symmetrically arranged conductive row 61, the lower ends of the conductive row 61 are respectively connected with the front arc starting row 1 and the rear arc starting row 2, and the lower ends of the rear arc starting row 2 It is connected with the static contact, the lower end of the front arcing bar 1 is connected with one end of the exciting helical bar 4, the exciting helical bar 4 is a mutually symmetrical double helix structure, and the other end of the exciting helical bar 4 is connected with the lower busbar 22 through the return bar 52 ,Such as figure 2 As shown; the excitation helical ...
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Abstract
The invention discloses a T-shaped symmetrical double-helix self-excited magnetic blowout arc extinguishing device, which includes relatively symmetrically arranged conductive bars, the lower ends of which are respectively connected with the front arc-leading bar and the rear arc-leading bar, and the lower ends of the rear arc-leading bar are It is connected with the static contact, the lower end of the leading arc bar is connected with one end of the exciting helical bar, and the other end of the exciting helical bar is connected with the lower busbar through the return bar; The ends are respectively connected with the magnetically conductive connecting plate, and the upper end of the magnetically conductive connecting plate abuts against the bottom of the front leading arc row. The invention can solve the problems of poor breaking capacity and poor arc blowing effect of the DC fast circuit breaker in the prior art, and has strong breaking capacity, long service life and high reliability.
Description
technical field [0001] The invention relates to a switching device, in particular to a T-shaped symmetrical double-helix self-excited magnetic blow-out arc extinguishing device. Background technique [0002] At present, many important industries such as urban rail transit, mining, metallurgy, and ship power in China have adopted DC power supply systems. As the most important protection device in the DC power supply system, the DC fast circuit breaker must have the ability to reliably switch on and off normal current and abnormal current (such as short circuit), and must also meet the temperature requirements for long-term operation. As the load capacity of DC power supply continues to increase, the current when a short-circuit fault occurs in the system often reaches nearly 100,000 amperes, and it becomes extremely difficult to break the large-capacity DC fast circuit breaker. and reliability have put forward high requirements. [0003] A DC circuit breaker is a key compon...
Claims
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IPC IPC(8): H01H9/34H01H71/32
CPCH01H9/34H01H71/32
Inventor 吴广宁周昱涵魏文赋高国强杨泽锋
Owner 杭州德睿达电气有限公司