CN1121255A - Protection switch - Google Patents
Protection switch Download PDFInfo
- Publication number
- CN1121255A CN1121255A CN 94117312 CN94117312A CN1121255A CN 1121255 A CN1121255 A CN 1121255A CN 94117312 CN94117312 CN 94117312 CN 94117312 A CN94117312 A CN 94117312A CN 1121255 A CN1121255 A CN 1121255A
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- CN
- China
- Prior art keywords
- plunger
- contact
- switch
- termination part
- elastic device
- 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.)
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Abstract
The protective switch for contactor and protective relay includes at least one electrode with a movable contact seat and a matched fixed contact. The movable contact is moved via the operating pole connected to the movable part of solenoid. The said switch also includes an elastic device between the end of the pole conencted to solenoid and the inserted rod of contact seat.
Description
The present invention relates to a kind of protection switch, this protection switch comprises at least one electrode, and this electrode comprises a movable contact seat, and this contact base matches with fixed contact, and adopts and moved by action bars, and this action bars is coupled mutually with solenoidal movable part.
In same shell, the protective device of contactor/protection relay type combines a contactor and a reducible current-limiting protection relay, the opposing short circuit current.Adopt pyromagnetic protected mode to cause contact response overload or current surge and be opened.
In order to increase the rated value of device, must increase the electrode contact pressure of response, but solenoid is not opened to such modification owing to the load of required normal current.
The objective of the invention is to increase the rated value of contactor/protection relay types of devices, but keep the solenoid that is suitable for low rated value.
Switch according to the present invention comprises that one is configured in and the end of the bar that solenoid couples and the elastic device between the contact base plunger.
According to a feature of the present invention, this elastic device comprises the free-ended termination part that is installed in plunger and a related springs of pressurized between described termination part and described plunger.
According to a feature of the present invention, this elastic device has and is used to the device that prevents that termination part and plunger from separating.
According to a feature of the present invention, this termination part carries a bearing, its restriction termination part moving towards plunger.
Describe the present invention in more detail below with reference to one embodiment of the present of invention, this embodiment exemplifies expression by respective drawings.
Fig. 1 is the sketch of apparatus of the present invention cross section;
Fig. 2 is the cross-sectional view of the contact operating mechanism of contact when opening;
The cross-sectional view of the contact operating mechanism when Fig. 3 is contact closure;
Fig. 4 is the cross-sectional view of contact operating mechanism when beginning to open contact;
Fig. 5 is mounted in the more detailed view of the elastic device on the contact base;
Fig. 6 is the curve chart of expression as the power of move function.
At the represented device of Fig. 1 is one contactor/protection relay, and it comprises a plurality of pairs of contact electrodes in shell 1, and it is indoor that each electrode is contained in a blocking.For simplifying accompanying drawing an electrode only is shown.
Each electrode comprises the movable contact bridge 21 by contact base 2 carryings, this contact bridge carrying movable contact, and movable contact and fixed contact 31,32 match, thereby switch on or off current path between two two links that are connected with fixed contact.Contact base 2 comprises a plunger 22 and moves along leading axle Z-Z ' guiding.The stage clip 23 that is pressed between the blocking back side, chamber and contact base 2 bottoms pushes away contact base in the direction of closed contact.
This device comprises the solenoid 4 that is contained in the housing 1, and it acts on the top of contact base plunger 22.Solenoid 4 comprises fixedly magnetic circuit or yoke 41, one movable magnetic circuit armature 42 and a coil 43 that is electrically connected with terminal through switch.Mobile armature 42 is connected on the action bars 44 by a pin 46, and this action bars with pin 45 is being pivotal mounting and for mobile contact seat 2 bears on the top of contact base 2, solenoidal mobile armature 42 links to each other with a return spring 47.
A trigger mechanism 5 is housed in the enclosure, is used for responding short circuiting contact seat 2 and operates.This mechanism comprises a movable core body 51 or touches rod that it is used for acting on the contact base 2 by swing arm 52.
Each current circuit connects magnetic heat protection module 6, and this module comprises the instantaneous trip magnetic device that prevents heavy current, and is used to provide the overload protection and the thermic devices of unbalance protection mutually.If module 6 detects overload or current surge on circuit loop, it is then operated contact base 2 by the intermediary of action bars 44.
All dropouts or manual operation action all relate to actuator 7, and this mechanism mechanically acts on the contact of device the inside and connects with solenoidal coil 43.Mechanism 7 can manually become response to come the instruction of self-shield module 6 automatically to be operated by control knob 71.The various states of this mechanism are represented by the position of operating knob 71.
Plunger 22 has an elastic device 8 in the top, and the free end of the action bars 44 that couples with solenoid can support thereon.This elastic device comprises a termination part 81 and spring 82, and the termination part is contained in the upper end of plunger 22, and spring is squeezed between termination part and the plunger.The free end of bar 44 is used to be bearing on the top of termination part 81.
Elastic device 8 is provided with the device that prevents that the termination part from separating from plunger 22, and these devices comprise that one is fixed on the termination part 81 and prevents the screw 84 that it separates from plunger 22.As an alternative, these devices also can comprise the hook spare that cooperates with plunger 22.This device comprises and is used for limiting the device that the termination part moves to plunger 22.These devices are made of the bearing 83 that is configured under the part of termination.
The following describes the working condition of this device.
When coil not during excited target, armature 42 is kept separating with yoke 41 by return spring 47, and action bars 44 is opened contact (Fig. 2).
When coil was energized, solenoid 4 closures caused action bars 44 to rotate.Spring 23 pressurized no longer at the blocking back side, chamber, contact closure (Fig. 3).
The effect (for example by operating knob being moved on to " OFF " position) of the control circuit by coil 43 can be opened contact.If solenoidal coil 43 no longer is subjected to excitement, solenoid is opened, and action bars 44 is opened electrode.
The overhang bracket of action bars 44 is on termination part 81 then, and when solenoid 4 was opened, termination part 81 moved inward, pressing spring 82 (Fig. 4).
Curve C among Fig. 6
1Be the power/displacement curve of the magnetic circuit of electrodeless (spring 47), curve 2 is power/displacement curves that the magnetic circuit of electrode (spring 23) is arranged, thick black line C
3Expression contacts.Curve C
4The effect of expression elastic device 8.
Certainly, variation on the details and change, even the use of equivalent all is feasible, do not depart from the scope of the present invention.
Claims (5)
1. contactor/protection relay class protection switch comprises at least one electrode, and this electrode comprises a movable contact seat, and it matches with fixed contact and is moved by the action bars that couples with solenoidal moving part phase-splitting.Also comprise an elastic device, between the described rod end head that this device is configured in and described solenoid couples and the plunger of described contact base.
2. according to the switch of claim 1, wherein said elastic device is included in the termination part of installing on the described plunger free end, and is pressed in the related springs between described termination part and the described plunger.
3. according to the switch of claim 1, wherein said elastic device has and is used for preventing the device that described termination part and described plunger separate.
4. according to the switch of claim 1, wherein said termination part loads a bearing, and this bearing limits its motion to plunger.
5. according to the switch of claim 1, comprise that further is used for the trigger mechanism that described contact base is operated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94117312 CN1121255A (en) | 1994-10-18 | 1994-10-18 | Protection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94117312 CN1121255A (en) | 1994-10-18 | 1994-10-18 | Protection switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1121255A true CN1121255A (en) | 1996-04-24 |
Family
ID=5038283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94117312 Pending CN1121255A (en) | 1994-10-18 | 1994-10-18 | Protection switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1121255A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079575C (en) * | 1996-09-09 | 2002-02-20 | 西门子公司 | Electric switch device |
| CN1303628C (en) * | 1998-05-15 | 2007-03-07 | 西门子能量及自动化公司 | Contact mechanism of electronic overload |
-
1994
- 1994-10-18 CN CN 94117312 patent/CN1121255A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079575C (en) * | 1996-09-09 | 2002-02-20 | 西门子公司 | Electric switch device |
| CN1303628C (en) * | 1998-05-15 | 2007-03-07 | 西门子能量及自动化公司 | Contact mechanism of electronic overload |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |