CN103872652A - Automatic protection three-phase knife switch of motor - Google Patents
Automatic protection three-phase knife switch of motor Download PDFInfo
- Publication number
- CN103872652A CN103872652A CN201410102342.4A CN201410102342A CN103872652A CN 103872652 A CN103872652 A CN 103872652A CN 201410102342 A CN201410102342 A CN 201410102342A CN 103872652 A CN103872652 A CN 103872652A
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- China
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- phase
- motor
- knife switch
- dian
- detacher
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Abstract
The invention discloses an automatic protection three-phase knife switch of a motor and belongs to the technical field of appliances. The automatic protection three-phase knife switch is composed of a three-phase knife switch body, a spring, a locking hook, an elastic touch sheet, an independent power supply, a detacher and a tracking device. The tracking device is used for tracking one-phase currents of the motor. When phase losing or overloading happens to a circuit, the tracking device is instantly communicated with the independent power supply of the detacher, so that the switch knife body is detached from the hook and trips and the motor is automatically protected. As the independent power supply is used, the motor can be automatically protected no matter where phase losing happens in the circuit.
Description
Ji Intraoperative field
The present invention relates to electricity Qi Ji Intraoperative field, the especially a kind of three-phase knife switch that can automatically protect motor.
Bei Jing Ji Intraoperative
Three-phase knife switch is widely used in the switch of low capacity three phase electric machine, and it is simple in structure, easy to use, and price is low to be subject to user and to welcome, and it can only be used as switch, in the time that phase shortage or overload appear in circuit, can not automatically protect motor, motor is burnt out and cause damage.
Summary of the invention
The problem to be solved in the present invention is to provide when phase shortage or overload appear in a kind of circuit can carry out the three-phase knife switch of automatically protecting to motor.
For addressing the above problem, the scheme that the present invention adopts is: three-phase knife switch promotes latch hook Compress Spring by handle and pinned by weighing apparatus iron latch hook, the normally opened contact closure of independent current source makes to connect simultaneously, independent current source is by normally opened contact and detacher UNICOM, another rubbish of independent current source connects together with Ji You contact, left contact, and detacher other end and elastic contact blade join.In the time that motor moves, the tracker that is connected on motor main circuit produces magnetic field, and the elastic contact blade with the left closing of contact is produced to suction, makes it depart from left contact and is parked in the locus between Yu You contact, left contact.When be connected with tracker a circuitry phase phase shortage time, tracker loss of excitation, elastic contact blade is by itself elastic reset and the left closing of contact, detacher and independent current source form generation magnetic field, loop and weighing apparatus iron latch hook are produced to suction, weighing apparatus iron latch hook starts action and breaks off relations with latch hook, and three-phase knife switch tripping operation is cut off the electricity supply.In the time of other phase phase shortage, motor single phasing circuital current increases, and the electric current of tracker also increases, and magnetic force strengthens attraction elastic contact blade deflection to the right and the right closing of contact, and detacher and independent current source connection generation magnetic attraction weighing apparatus iron latch hook break off relations and cut off the electricity supply.In the time of motor overload, circuital current increase unhook principle is identical therewith.
Owing to adopting such scheme, this invention has following beneficial effect compared with Xian You Ji Intraoperative:
1, simple applicable three-phase knife switch also can be protected automatically to motor.
No matter the phase shortage that 2 circuit occur Anywhere can realize automatic trip.
Brief description of the drawings
Figure of description is structural representation of the present invention
Embodiment
Below in conjunction with accompanying drawing example, structure of the present invention is done to detail explanation:
In structure shown in the drawings: three-phase knife switch 3 promotes latch hook 2 Compress Springs 1 by handle and pinned by weighing apparatus iron latch hook 4, make to connect normally opened contact 11 closures of independent current source 5 simultaneously, normally opened contact 11 is connected with detacher 7, another utmost point of independent current source 5 connects together with left contact 8 and right contact 9, the other end of detacher 7 is connected with elastic contact blade 6, the tracker 10 that is connected on motor main circuit in the time of motor rotation produces magnetic force, and the elastic contact blade 6 with left contact 8 closures is attracted to the locus between left contact 8 and right contact 9.
Claims (1)
1. a motor is protected three-phase knife switch automatically, by spring, latch hook, three-phase knife switch, weighing apparatus iron latch hook, independent current source, elastic contact blade, detacher, Zuo Chu Dian, right contact, tracker and normally opened contact composition, it is characterized in that: three-phase knife switch (3) promotes latch hook (2) Compress Spring (1) by handle and pinned by weighing apparatus iron latch hook (4), to connect normal Kai Chu Dian (11) closure of independent current source (5) simultaneously, normal Kai Chu Dian (11) is connected with detacher (7), another utmost point of independent current source (5) connects together with left contact (8) and You Chu Dian (9), the other end of detacher (7) is connected with elastic contact blade (6), tracker (10) is connected in the main circuit of motor one phase, after energising, tracker (10) produces magnetic force energy attracting to the locus between the left Dian (8) of touching and the right Dian (9) of touching with the closed elastic contact blade (6) of the left Dian (8) of touching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102342.4A CN103872652A (en) | 2014-03-13 | 2014-03-13 | Automatic protection three-phase knife switch of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410102342.4A CN103872652A (en) | 2014-03-13 | 2014-03-13 | Automatic protection three-phase knife switch of motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103872652A true CN103872652A (en) | 2014-06-18 |
Family
ID=50910914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410102342.4A Pending CN103872652A (en) | 2014-03-13 | 2014-03-13 | Automatic protection three-phase knife switch of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103872652A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2079364U (en) * | 1990-09-26 | 1991-06-19 | 张长在 | Multi-function protective socket |
| CN2208740Y (en) * | 1994-12-01 | 1995-09-27 | 宋国良 | Multi-function automatically protecting three-phase knife switch |
| CN2210468Y (en) * | 1994-08-19 | 1995-10-18 | 景玉通 | Safety switch for electric motor |
| CN1331481A (en) * | 2000-06-24 | 2002-01-16 | 邱晓波 | Knife switch special for double-safety motor |
| KR20100054334A (en) * | 2008-11-14 | 2010-05-25 | 삼화디에스피주식회사 | Motor protection apparatus and method capable of measuring insulation resistance |
-
2014
- 2014-03-13 CN CN201410102342.4A patent/CN103872652A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2079364U (en) * | 1990-09-26 | 1991-06-19 | 张长在 | Multi-function protective socket |
| CN2210468Y (en) * | 1994-08-19 | 1995-10-18 | 景玉通 | Safety switch for electric motor |
| CN2208740Y (en) * | 1994-12-01 | 1995-09-27 | 宋国良 | Multi-function automatically protecting three-phase knife switch |
| CN1331481A (en) * | 2000-06-24 | 2002-01-16 | 邱晓波 | Knife switch special for double-safety motor |
| KR20100054334A (en) * | 2008-11-14 | 2010-05-25 | 삼화디에스피주식회사 | Motor protection apparatus and method capable of measuring insulation resistance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140618 |