Magnetic-latching DC fast circuit breaker
A rapid circuit breaking and magnetic holding technology, applied in the direction of protection switch operation/release mechanism, can solve the problems of high cost of electric holding mechanism, increase of operating cost, tripping of circuit breaker, etc., achieve perfect reliability and improve the effect of operation reliability
Active Publication Date: 2014-04-02
上海立新电器控制设备有限公司
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Problems solved by technology
The power holding mechanism requires a constant power supply. Once the control power supply loses power, the circuit breaker trips, causing a major accident in the main circuit power failure. In order to ensure the normal operation of the circuit, a backup power supply, dual power supply and automatic switching are required, plus a UPS battery pack Stabilized power supply, so the cost of the power holding mechanism is relatively high, and the power holding structure is very energy-consuming, cannot be powered off, requires a backup power supply, and increases operating costs
Method used
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Embodiment Construction
[0012] A preferred embodiment is given below to illustrate the present invention more clearly and completely in conjunction with the accompanying drawings.
[0013] Such as Figure 1 to Figure 3 As shown, the magnetic holding DC fast circuit breaker of the present invention includes a bottom plate 1, an upper bus bar 2, a static contact 3, a lower bus bar 4, a base 5, a movable contact 6, an arc extinguishing chamber 10, an overcurrent trip device 20, Fork rod 30, push rod 40, auxiliary contact box 50, closing holding device 60, contact rod 61, recovery spring 62, coil frame 630, cover 64, moving iron core 65, disc spring 66, flange 67, frame 631 , Coil 632, epoxy resin 633, disc 634 and magnetic steel 635, in which the upper bus bar 2, the lower bus bar 4, the movable contact 6, and the static contact 3 form a contact conductive circuit; the arc extinguishing chamber 10 is fixed in On the bottom plate 1, the movable contact 6 is located between the upper bus bar 2 and the lower...
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The invention discloses a magnetic-latching DC fast circuit breaker comprising a bottom plate, an upper busbar, a static contact, a lower busbar, a base, a moving contact, an arc extinguishing chamber, an overcurrent tripping device, a fork rod, a push rod, an auxiliary contact box and a closed latching device, wherein the arc extinguishing chamber is fixed on the bottom plate; the moving contact is positioned between the upper busbar and the lower busbar; the static contact is positioned on the upper busbar; the overcurrent tripping device and the closed latching device are fixed on the base; the fork rod is connected with the closed latching device; and the push rod and the auxiliary contact box are fixed on the base. The magnetic-latching DC fast circuit breaker substitutes for an electric latching mechanism or a mechanical latching mechanism, has no complex mechanical structure, is not influenced by a control power supply, and has the enhanced operation reliability.
Description
Technical field [0001] The invention relates to a circuit breaker, in particular to a magnetic holding DC fast circuit breaker. Background technique [0002] The DC fast circuit breaker is used for overload and short circuit protection of the feeder network of subway and light rail DC traction substations. It is also suitable for the use of large generator main excitation circuit and non-linear resistance to cooperate with de-excitation protection circuit breaker, with appropriate constant resistance to form a generator The de-excitation combined electrical appliances are also suitable for the main protection of rectifiers and DC motors in important industrial fields such as steel rolling and mining traction. [0003] At present, the domestic DC fast circuit breaker holding mechanism has two forms: mechanical holding and electrical holding. The holding mechanism of the circuit breaker traditionally adopts a mechanical holding mechanism. Specifically, the four-bar linkage saves eff...
Claims
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IPC IPC(8): H01H71/32
Inventor 邱有杰
Owner 上海立新电器控制设备有限公司