CN2239657Y - Plastic-casing circuit breaker - Google Patents
Plastic-casing circuit breaker Download PDFInfo
- Publication number
- CN2239657Y CN2239657Y CN 95205859 CN95205859U CN2239657Y CN 2239657 Y CN2239657 Y CN 2239657Y CN 95205859 CN95205859 CN 95205859 CN 95205859 U CN95205859 U CN 95205859U CN 2239657 Y CN2239657 Y CN 2239657Y
- Authority
- CN
- China
- Prior art keywords
- arc extinguishing
- contact
- arc
- circuit breaker
- current
- 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
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Abstract
The utility model discloses a plastic-casing circuit breaker. A contact terminal mechanism is covered by the arc extinguishing device of the plastic-casing circuit breaker, and the static contact terminal of the contact terminal mechanism is composed of a contact terminal support frame, a contact terminal and a current-limiting resistor; the current limiting resistor is arranged on the side of the contact terminal support frame, and the height of the upper edge of the current limiting resistor is lower than the mounting height of the lower edge of the arc extinguishing device; if the mounting height of the arc extinguishing device is kept unchanged, the mounting height of the current limiting resistor is lowered, and the width of the arc extinguishing device can be expanded towards both sides. The volumetric capacity of the arc extinguishing device is enlarged 30% of the volumetric capacity of the former arc extinguishing device according to calculation; distinctly, the arc extinguishing capacity of the plastic-casing circuit breaker is increased because that the new design is adopted.
Description
The utility model relates to a kind of mold cased circuit breaker.
Be provided with contact mechanism, operating mechanism, tripping mechanism and arc-control device in the housing of mold cased circuit breaker, wherein the arc-control device spiral-lock in contact mechanism fixed contact about between two current-limiting resistances, in order to prevent that arc-control device is with occurring short circuit between the current-limiting resistance, between arc-control device is with current-limiting resistance, also be inserted with flash barrier, therefore, the width of arc-control device is limited by current-limiting resistance and flash barrier, make that the volume of arc-control device can not be enough big, this has also just influenced the further raising of arc-control device arc extinguishing ability.
The purpose of this utility model provides a kind of mold cased circuit breaker that can further improve the arc extinguishing ability.
The utility model is to achieve the above object by the structural design of improving fixed contact, fixed contact is made up of contact supporting, contact and current-limiting resistance, wherein contact welds on contact supporting, current-limiting resistance is arranged on the side of contact supporting, and feature of the present utility model is the setting height(from bottom) that the height of current-limiting resistance upper limb is lower than the arc-control device lower edge.
After adopting the fixed contact of said structure, in plastic casing, if the setting height(from bottom) of arc-control device is constant, so, the setting height(from bottom) of current-limiting resistance upper limb reduces greatly, and to have reserved width in the both sides of arc-control device be the space of current-limiting resistance with flash barrier thickness sum, like this, the width of arc-control device just can be widened, it is calculated that the volume of the original arc-control device of volumetric ratio of new arc-control device increases 30%, obviously, after mold cased circuit breaker has adopted technology described in the utility model, its arc extinguishing ability will improve greatly.
Illustrate particular content of the present utility model below in conjunction with drawings and Examples.
Fig. 1: partial structurtes figure of the present utility model;
Fig. 2: the front view of fixed contact;
Fig. 3: the end view of fixed contact.
Mold cased circuit breaker is by contact mechanism, operating mechanism, tripping mechanism, arc-control device 8 and plastic casing 1 are formed, wherein contact mechanism comprises moving contact 2 and fixed contact 3, arc-control device 8 cover caps are on contact mechanism, fixed contact 3 is installed in the rear wall of plastic casing 1, by contact supporting 4, contact 5 and current-limiting resistance 6 are formed, wherein contact 5 welds on contact supporting 4, current-limiting resistance 6 is arranged on the side of contact supporting 4, can one-sidedly be provided with, also can be provided with both sides, and the height h of the upper limb 7 of current-limiting resistance 6 is lower than the setting height(from bottom) of arc-control device 8 lower edges, and the width of arc-control device 8 equals the width B of fixed contact 3.Because after current-limiting resistance 6 highly reduced, its resistance will reduce, therefore to suitably reduce the cross-sectional area of current-limiting resistance 6, and consider the selection of its material.
Claims (1)
1, a kind of mold cased circuit breaker with contact mechanism, operating mechanism, tripping mechanism, arc-control device and plastic casing, wherein the arc-control device cover cap is on contact mechanism, fixed contact in the contact mechanism is made up of contact supporting, contact and current-limiting resistance, current-limiting resistance is arranged on the side of contact supporting, it is characterized in that: the height (h) of the upper limb (7) of current-limiting resistance (6) is lower than the setting height(from bottom) of arc-control device (8) lower edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95205859 CN2239657Y (en) | 1995-03-27 | 1995-03-27 | Plastic-casing circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95205859 CN2239657Y (en) | 1995-03-27 | 1995-03-27 | Plastic-casing circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2239657Y true CN2239657Y (en) | 1996-11-06 |
Family
ID=33857965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95205859 Expired - Fee Related CN2239657Y (en) | 1995-03-27 | 1995-03-27 | Plastic-casing circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2239657Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100377272C (en) * | 2003-03-11 | 2008-03-26 | 富士电机机器制御株式会社 | Moulded cased circuit breaker |
-
1995
- 1995-03-27 CN CN 95205859 patent/CN2239657Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100377272C (en) * | 2003-03-11 | 2008-03-26 | 富士电机机器制御株式会社 | Moulded cased circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |