CN202034287U - Low-voltage automatic knife switch - Google Patents

Low-voltage automatic knife switch Download PDF

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Publication number
CN202034287U
CN202034287U CN201020632884XU CN201020632884U CN202034287U CN 202034287 U CN202034287 U CN 202034287U CN 201020632884X U CN201020632884X U CN 201020632884XU CN 201020632884 U CN201020632884 U CN 201020632884U CN 202034287 U CN202034287 U CN 202034287U
Authority
CN
China
Prior art keywords
switch
low
contact
disconnection
center line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201020632884XU
Other languages
Chinese (zh)
Inventor
谢存伟
蒋春雨
郝建刚
付文竹
徐晓光
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUNAN ELECTRIC POWER COMPANY HEBI POWER SUPPLY Co
Original Assignee
HUNAN ELECTRIC POWER COMPANY HEBI POWER SUPPLY Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HUNAN ELECTRIC POWER COMPANY HEBI POWER SUPPLY Co filed Critical HUNAN ELECTRIC POWER COMPANY HEBI POWER SUPPLY Co
Priority to CN201020632884XU priority Critical patent/CN202034287U/en
Application granted granted Critical
Publication of CN202034287U publication Critical patent/CN202034287U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a low-voltage automatic knife switch, which comprises an isolating knife switch, a fuse, a long permanent magnet operating mechanism, a bistable permanent magnet lock catch, an electronic controller and an open-phase and neutral wire protector, wherein the long permanent magnet operating mechanism comprises an insulated driving rod; the end part of the insulated driving rod is connected with the isolating switch through the bistable permanent magnet lock catch; and the long permanent magnet operating mechanism is controlled by the electronic controller to carry out electric control operation. The low-voltage automatic knife switch has the functions of enhancement of the load breaking capacity of a switch, open-phase protection, neutral wire over-voltage protection and electric control operation and is suitable for a low-voltage power distribution system.

Description

Low-pressure automatic disconnection switch
Technical field
The utility model relates to the utility model and relates to a kind of low tension switch field, especially relates to a kind of low-pressure automatic disconnection switch.
Background technology
One of as everyone knows, low tension switch is to use at most in low-voltage distribution system, and most important electric equipment, of a great variety, wherein air switch mainly closes circuit by manually disconnected, has short circuit and overload protection function; A.C. contactor and other electrical equipment can constitute electric-control system, have arc control device, can play overload protective function, can not play the short-circuit protection effect; Knife switch can only disconnect little load current, and the maximum of usefulness are the cutter isolating switches, and disconnecting has tangible cut-off point, also all is manual operation, also has some that cutter isolating switch and fuse are used in combination or they are combined into one.More than these ordinary appliances except that the need manual operation, also do not have open-phase protection and center line overvoltage protection and status display function.
The utility model content
In view of this, in order to overcome the defective of prior art, the utility model purpose is to provide a kind of low-pressure automatic disconnection switch, strengthens switch and disconnects load-bearing capacity, has open-phase protection, center line overvoltage protection, electric control operation function simultaneously.
For achieving the above object, the utility model by the following technical solutions:
Low-pressure automatic disconnection switch of the present utility model; comprise disconnection switch, fuse, long permanent-magnet manipulating mechanism, bistable permanent magnetic Locking device, electronic controller, phase shortage and center line line disconnection protector; described long permanent-magnet manipulating mechanism comprises an insulating driving rod; the end of insulating driving rod is connected with disconnection switch by the bistable permanent magnetic Locking device, and long permanent-magnet manipulating mechanism carries out automatically controlled actuating under electronic controller control.
Further, the bistable permanent magnetic Locking device comprises the snap close pin of a band permanent magnet, and the end of insulating driving rod connects with the snap close pin, and the snap close pin is movable snap close pin.
Further, phase shortage and center line line disconnection protector comprise phase shortage supervisory circuit and center line disconnection protection circuit; Wherein, described phase shortage supervisory circuit adopts capacitor in parallel to form, and described center line disconnection protection circuit is made up of electronic switch and release; The output of phase shortage and center line line disconnection protector is connected with electronic controller.
Further, the movable touch knife of described disconnection switch adopts the double-pole formula, and the fixed contact of described disconnection switch adopts dual compound contact; Described dual compound contact is made up of interior contact and outer contact, and outer contact outside is provided with Spring Card.
Further, contact and outer contact centre are provided with the current-limiting arc-extinguishing device in described.
The beneficial effects of the utility model are:
The first, cutter isolating switch---fuse combination, comprehensively both advantages can rise and control, and can play short circuit and overload protective function again, and volume is little; The second, permanent magnet mechanism adapted electronic controller is realized various operations, saves heavy manual labor, and is swift to operate, flexibly, shortens interruption duration; Three, adopt double-pole formula movable touch knife and dual compound fixed contact to increase negotiability; Four, install the current-limiting arc-extinguishing device additional in the middle of the dual compound contact, can disconnect the respective negative charged current; Five, economize on electricity and phase shortage---center line breaking protection improves power consumption equipment and personnel protection lsafety level and saves energy; Six, owing to be provided with the bistable permanent magnetic Locking device, can manually take off the movable touch knife spare that melt is housed after the melt fusing and change.
Description of drawings
Fig. 1 is the utility model low-pressure automatic disconnection switch phase structure figure.
Fig. 2 is the utility model low-pressure automatic disconnection switch Locking device mechanism principle figure.
Fig. 3 is the dual compound static contact structure figure of the utility model low-pressure automatic disconnection switch.
Fig. 4 is the phase shortage and the center line line disconnection protector schematic diagram of the utility model low-pressure automatic disconnection switch.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4; the utility model low pressure automatic control knife switch comprises isolation knife 5, melt 6, long permanent-magnet manipulating mechanism 10, bistable permanent magnetic Locking device 7, electronic controller, phase shortage and center line line disconnection protector 20; described long permanent-magnet manipulating mechanism 10 comprises an insulating driving rod; this insulating driving rod is a mechanism driving bar 11; the end of mechanism driving bar 11 is connected with isolation knife 5 switches by the bistable permanent magnetic Locking device, and long permanent-magnet manipulating mechanism 10 carries out automatically controlled actuating under electronic controller control.During concrete enforcement, insulator 2 is housed on the flute profile base 1, have on the insulator of the fixed contact 3a of current-limiting arc-extinguishing device 4 and the folding end that terminal block 9 is contained in isolation knife 5, the other end is equiped with the connecting plate of one, this connecting plate is fixed contact 3b, the two end portions of isolation knife 5 is the copper metal, middle epoxy plate 8 with insulation is connected to a rigid body, melt 6 is coupled together by bolt through epoxy plate 8, long permanent-magnet manipulating mechanism 10 is contained in the opposite side of flute profile base 1, mechanism driving bar 11 and isolation knife 5 couple together by bistable state Locking device 7, and isolation knife 5 connects with fixed contact 3b by rotation axis 0.
In conjunction with shown in Figure 2, bistable permanent magnetic Locking device 7 is fixed on the steel bracket 12 on the isolation knife 5 by bolt 13, bistable permanent magnetic Locking device 7 comprises permanent magnet 15, the certain position that permanent magnet 15 is fixed on non-magnetic movable pin 14 forms the snap close pin, and the bottom of guiding movable pin 14 couples together isolation knife 5 and mechanism driving bar 11; In under external force, described snap close pin can withdraw from the snap close state, and long contact Permanent Magnetic Gear transmission mechanism and knife switch assembly are broken away from, and cutter hub can take off replacing.
In conjunction with shown in Figure 3, the dual compound fixed contact 3a of the automatically controlled knife switch of the utility model is made up of with outer contact 16 interior contact 17a and 17b, and outer contact 16 outsides are provided with Spring Card 18 again, increase outer contact pressure.Between interior contact 17a and 17b, be equiped with current-limiting arc-extinguishing device 4.
In conjunction with shown in Figure 4; a, b, c represent three live wires among Fig. 4; N represents center line, and phase shortage and center line line disconnection protector 20 are made up of capacitor 21,22 and center line breaking protection unit 24, signal transformer 23, and the AC signal that phase shortage and center line line disconnection protector 20 are sent is given electronic controller.The capacity of capacitor 21 is decided on the distribution transformer no-load current.Described center line breaking protection unit 24 is made up of electronic switch and release.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, other modifications that those of ordinary skills make the technical solution of the utility model or be equal to replacement, only otherwise break away from the spirit and scope of technical solutions of the utility model, all should be encompassed in the middle of the claim scope of the present utility model.

Claims (5)

1. low-pressure automatic disconnection switch; comprise disconnection switch and fuse; it is characterized in that: also comprise long permanent-magnet manipulating mechanism, bistable permanent magnetic Locking device, electronic controller, phase shortage and center line line disconnection protector; described long permanent-magnet manipulating mechanism comprises an insulating driving rod; the end of insulating driving rod is connected with disconnection switch by the bistable permanent magnetic Locking device, and long permanent-magnet manipulating mechanism carries out automatically controlled actuating under electronic controller control.
2. low-pressure automatic disconnection switch according to claim 1 is characterized in that: the bistable permanent magnetic Locking device comprises the snap close pin of a band permanent magnet, and the end of insulating driving rod connects with the snap close pin, and the snap close pin is movable snap close pin.
3. low-pressure automatic disconnection switch according to claim 2 is characterized in that: phase shortage and center line line disconnection protector comprise phase shortage supervisory circuit and center line disconnection protection circuit; Wherein, described phase shortage supervisory circuit adopts capacitor in parallel to form, and described center line disconnection protection circuit is made up of electronic switch and release; The output of phase shortage and center line line disconnection protector is connected with electronic controller.
4. low-pressure automatic disconnection switch according to claim 3 is characterized in that: the movable touch knife of described disconnection switch adopts the double-pole formula, and the fixed contact of described disconnection switch adopts dual compound contact; Described dual compound contact is made up of interior contact and outer contact, and outer contact outside is provided with Spring Card.
5. low-pressure automatic disconnection switch according to claim 4 is characterized in that: contact and outer contact centre are provided with the current-limiting arc-extinguishing device in described.
CN201020632884XU 2010-11-30 2010-11-30 Low-voltage automatic knife switch Expired - Fee Related CN202034287U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201020632884XU CN202034287U (en) 2010-11-30 2010-11-30 Low-voltage automatic knife switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201020632884XU CN202034287U (en) 2010-11-30 2010-11-30 Low-voltage automatic knife switch

Publications (1)

Publication Number Publication Date
CN202034287U true CN202034287U (en) 2011-11-09

Family

ID=44896576

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201020632884XU Expired - Fee Related CN202034287U (en) 2010-11-30 2010-11-30 Low-voltage automatic knife switch

Country Status (1)

Country Link
CN (1) CN202034287U (en)

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Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20111109

Termination date: 20111130

C17 Cessation of patent right