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Arc arrester and switch having same

An arc suppression and arc technology, applied in electric switches, high-voltage/high-current switches, circuit breaker parts, etc., can solve the problems of inability to actively contact the arc, difficulty in the arc, weak electromagnetic force of the grid, etc., and achieve stable interruption. performance, the effect of eliminating arcs in the large current range and small current range, and stabilizing the electromagnetic force

Inactive Publication Date: 2009-05-06
ENERGY SUPPORT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, the grid-type arc suppression device blocks the small currents below several 10 amperes such as the exciting current and the charging current in the high-voltage AC load switch above 3.6 / 7.2KV, that is, eliminates small currents and more. Difficulty with arcs generated by small currents
Due to the insufficient energy of the arc current, the electromagnetic force generated by the grid is weak, so that the arc cannot actively contact the arc-extinguishing member (the above-mentioned insulator and insulating plate)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0083] Hereinafter, for the first embodiment of the present invention embodied as an arc suppression device of a switch, according to Fig. 1 to Figure 9 Be explained.

[0084] As shown in Figure 1, on the opposite side walls of the main body shell 12 of the switch 11, the power supply side bushing 13 and the load side bushing 14 are three-phase and each phase is relatively penetrated and supported respectively (a phase division is shown in Figure 1 ). A rod-shaped fixed electrode 15 protrudes from the inner end of the power supply side bushing 13 , and an arc-resistant metal 15 a is fixed to the upper end of the same fixed electrode 15 . A conductive rod 16 protrudes from the inner end of the load-side bushing 14 , and is rotatably supported by the base end of the movable electrode 18 via a shaft 17 on the same conductive rod 16 . Such as figure 2 The movable electrode 18 has a pair of contact blades 18a, 18b in the shape of a parallel plate as shown by the dashed-two dotted...

no. 2 example

[0150] Below, according to Figure 10-13 A second embodiment of the present invention will be described.

[0151] Such as Figure 10 As shown in FIG. 11 , an arc suppression device 30 is provided at the inner end of the power measuring sleeve 13 . The arc extinguishing device 30 is composed of a plurality of thin plate-shaped magnetic plates 40 formed of magnetic materials and a plurality of arc extinguishing members 50 formed of a synthetic resin material having insulating and arc extinguishing properties. Arranged in a staggered manner at predetermined intervals.

[0152] magnetic board

[0153] Such as Figure 12 As shown, the magnetic plate 40 is formed into a W-shaped plate from a magnetic material such as steel. In this embodiment, the thickness d1 of the magnetic plate 40 is 1 mm. A pair of magnetic plate passages 41a, 41b through which the contact blades 18a, 18b can pass, respectively, are formed at predetermined intervals at the front edge of the magnetic plate...

no. 3 example

[0224] Hereinafter, for the third embodiment of the arc suppression device 100A which embodies the present invention as a switch, according to Fig. 25 to Figure 39 Be explained. Also, the same members as those in the first embodiment are given the same member numbers, and redundant descriptions are omitted.

[0225] As shown in Figure 25, on the opposite side walls 12a, 12b of the main body shell 12 of the switch 11, the power supply side bushing 13 and the load side bushing 14 are three phases and each phase is relatively penetrated and supported respectively (in Figure 25 only represents a phase). The arc extinguishing device 100A is fixed to the inner end of the power supply side bushing 13 (the tip of the fixed electrode 15 ) with a fixing metal 318 . The conductive rod 16 of the load side bushing 14 is rotatably supported by the base end portion of the movable electrode 18 via the shaft 17 . Such as Figure 26 As shown by the two-dot chain line in the middle, the mov...

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Abstract

Provided is an arc extinguishing device capable of extinguishing an arc not only at a high-current zone but also at a low-current zone by improving an arc extinguishing performance. A grid 110 having grid channels 111a, 111b and an arc extinguishing member 120 having arc extinguishing member channels 121a, 121b are alternately arrayed at a given interval in a moving direction of a movable electrode. The movable electrode is made to pass the grid channels 111a, 111b and the arc extinguishing member channels 121a, 121b sequentially at open channels. Narrow grooves 112a, 112b are formed at the innermost part of the grid channels 111a, 111b. When the channels are opened, the arc is attracted and fixed to (restrained by) the narrow grooves 112a, 112b. Especially, by restraining the arc of the low-current zone in the circuit interrupter 100, a contact time of the arc with an arc extinguishing decomposition gas generated from the arc extinguishing member 120 is secured. As a result, an arc of the low current zone can also be promptly extinguished.

Description

technical field [0001] The invention relates to an arc-extinguishing device and a switch with the same. When the circuit is open, the arc-extinguishing device can eliminate the arc generated between the fixed electrode and the movable electrode. Background technique [0002] For example, in Japanese Patent Publication No. 6-77417 "Arc-extinguishing Device" published on August 8, 1987, the arc-extinguishing device has a plurality of grids (grids) (magnetic bodies) with recesses for attracting arcs. A plurality of cutouts formed on the back side of the insulator (arc extinguishing member). A portion of the grid is exposed from a thin groove formed in the center of the insulator. When the circuit is open, around the arc column, due to the existence of the grid, a deflected magnetic flux distribution is generated, and the arc is driven to the inner side of the grid notch recess. Therefore, the arc is cut off by each magnetic body while extending, and the voltage of the cathode...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H9/36H01H9/44H01H33/10H01H33/18H01H73/18H01H33/00
CPCH01H33/08H01H33/38H01H33/53
Inventor 三口邦夫北折光博春日井茂雄荻原隆宏
Owner ENERGY SUPPORT CORP
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