CN103843101A - Earth-leakage circuit breaker - Google Patents
Earth-leakage circuit breaker Download PDFInfo
- Publication number
- CN103843101A CN103843101A CN201280048571.1A CN201280048571A CN103843101A CN 103843101 A CN103843101 A CN 103843101A CN 201280048571 A CN201280048571 A CN 201280048571A CN 103843101 A CN103843101 A CN 103843101A
- Authority
- CN
- China
- Prior art keywords
- base plate
- printed base
- circuit
- circuit breaker
- contact
- 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.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
- H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber
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Abstract
This earth-leakage circuit breaker is constructed by installing, inside a case (12), main circuit contacts, a contact opening/closing mechanism, a zero-phase current transformer (19) which is provided on the main circuit in an intervening manner, an earth-leakage tripping unit (21), an arc-extinguishing unit (18), a printed board (22) on which circuit components for an earth-leakage detection circuit and an earth-leakage test circuit are mounted, and a pushbutton-type test switch (25) which is connected to the earth-leakage test circuit. Additionally, an internal unit (29) that internally contains the printed board (22) is housed inside the case (12), and an arc gas generated by the arc-extinguishing unit (18) is prevented by the internal unit (29) from coming into contact with the printed board (22).
Description
Technical field
The present invention relates to have the residual current circuit breaker of leakage tests circuit.
Background technology
As residual current circuit breaker, for example device of known patent document 1.
The residual current circuit breaker of this patent documentation 1 is accommodated with main circuit contact, contact switching mechanism, the zero phase current transformer that is plugged in main circuit, leakage tripping device, arc-extinction device in box main body, be equipped with push button Test Switchboard that electric-leakage detection circuit is connected with the printed base plate of the circuit block of leakage tests circuit, with leakage tests circuit etc.
Fig. 7 is illustrated in the peripheral construction of the push button Test Switchboard of the residual current circuit breaker of recording in patent documentation 1, is placed with printed base plate 2 on the top of zero phase current transformer 1, disposes the lid 3 of box main body on the top of this printed base plate 2.In addition, be positioned at the bottom of printed base plate 2 and dispose in parallel leakage tripping device 4 with zero phase current transformer 1.
In addition, a pair of test pin terminal of zero phase current transformer 1 is outstanding from the upper surface of printed base plate 2, and these a pair of test pin terminals become fixed contact 6a, the 6b of a pair of Test Switchboard 5.And, lid 3 dispose can be mobile downwards utilization recover the button 8 of the Test Switchboard 5 that retreats upward of spring 7, and, be fixed with in the lower end of this button 8 by movement downwards of button 8 and with the moving contact 9 of pair of fixed contacts 6a, 6b bridge joint.
Prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2000-3660 communique (Fig. 1～Fig. 5).
Summary of the invention
The problem that invention will solve
But, in the residual current circuit breaker of above-mentioned patent documentation 1, flow through earth current at main circuit, the electric arc that contact switching mechanism produces while opening circuit action is by arc-extinction device extinguishing arc, but the shield member that the arcing gas that does not exist shielding to be produced by arc-extinction device between the printed base plate 2 in box main body and arc-extinction device goes to printed base plate 2.Therefore,, in the time that the carbon black comprising in the arcing gas being produced by arc-extinction device etc. is attached to the circuit of printed base plate 2, the insulation property of printed base plate 2 may decline.
So, the object of the present invention is to provide a kind ofly by preventing and the contacting of arcing gas, can improve the residual current circuit breaker of the insulation property of printed base plate.
For solving the technical scheme of problem
In order to reach above-mentioned purpose, the residual current circuit breaker of an embodiment of the invention, in box body, be assembled with main circuit contact, contact switching mechanism, be plugged in the zero phase current transformer of main circuit, leakage tripping device, arc-extinction device, be equipped with electric-leakage detection circuit and the printed base plate of the circuit block of leakage tests circuit and the push button Test Switchboard being connected with above-mentioned leakage tests circuit, there is the internal element of above-mentioned printed base plate to be accommodated in above-mentioned box body in internal configurations, above-mentioned internal element shields contacting of the arcing gas that produced by above-mentioned arc-extinction device and above-mentioned printed base plate.
According to the residual current circuit breaker of this execution mode, the carbon black that the arcing gas being produced by arc-extinction device comprises can not be attached to the circuit of printed base plate.
In addition,, in the residual current circuit breaker of an embodiment of the invention, above-mentioned internal element comprises: cover the one side side of above-mentioned printed base plate the unit box at the another side side opening of this printed base plate; With the unit cover that can load and unload Yi Jiang unit, the opening edge inner sealing that is sticked in this unit box, above-mentioned push button Test Switchboard comprises: the fixed contact arranging at the another side that is disposed at the above-mentioned printed base plate in said units box; With moving contact that arrange, that can move to above-mentioned fixed contact by the push action of this button on button being disposed at said units lid.
According to the residual current circuit breaker of this execution mode, form push button Test Switchboard by printed base plate and its internal element of storage, therefore can realize the miniaturization of Test Switchboard.
In addition, in the residual current circuit breaker of an embodiment of the invention, above-mentioned fixed contact is provided with a pair of away from each other at the another side of above-mentioned printed base plate, and above-mentioned moving contact is bridge joint between the front end of above-mentioned button is by above-mentioned pair of fixed contacts.
According to the residual current circuit breaker of this execution mode, even the more small internal element of relative distance between printed base plate and unit cover also can be guaranteed large insulation distance.
Further, in the residual current circuit breaker of an embodiment of the invention, by the above-mentioned moving contact of bridge joint between above-mentioned pair of fixed contacts be can strain conductive plate.
According to the residual current circuit breaker of this execution mode, even be pressed into button with brute force, the moving contact contacting with pair of fixed contacts is strain deflection on one side on one side also, can not apply excessive stress to pair of fixed contacts.
Invention effect
According to residual current circuit breaker of the present invention, in box body, receive the internal element that internal configurations has printed base plate, internal element shields contacting of the arcing gas that produced by arc-extinction device and above-mentioned printed base plate, therefore the carbon black that the arcing gas being produced by arc-extinction device comprises can not be attached to the circuit of printed base plate, can improve the insulation property of printed base plate.
Brief description of the drawings
Fig. 1 is the major part sectional view that represents residual current circuit breaker of the present invention.
Fig. 2 is the circuit diagram of residual current circuit breaker of the present invention.
Fig. 3 is the stereogram of the inside of the residual current circuit breaker after representing the part for the box body of residual current circuit breaker of the present invention to unload.
Fig. 4 is the figure that is illustrated in the state after the unit cover of internal element being unloaded in the device of Fig. 3.
Fig. 5 is the figure that represents the holding state of push button Test Switchboard of the present invention.
Fig. 6 is the figure of the state that represents that the fixed contact of push button Test Switchboard of the present invention contacts with moving contact.
Fig. 7 is the figure that represents the structure of the push button Test Switchboard of existing residual current circuit breaker.
Embodiment
Describe in detail and be used for implementing mode of the present invention (hereinafter referred to as execution mode) referring to accompanying drawing.
Fig. 1 is the major part sectional view that represents the residual current circuit breaker of an embodiment of the invention, Fig. 2 is the circuit diagram of the residual current circuit breaker of an execution mode, Fig. 3 is the stereogram of the inside of the residual current circuit breaker after representing the lid of main body box to unload, and Fig. 4 is the figure that represents the state that the unit cover of unit that is accommodated in main body box is unloaded.
The residual current circuit breaker of present embodiment as shown in Figure 1, is assembled with: the main circuit terminal 13 of mains side in the main body box 12 that comprises matrix 10 and lid 11; The main circuit terminal 14 of load-side; Form fixed contact 15 and the moving contact 16 of main circuit contact; Lever 17 with switching mechanism (not shown) link; By the arc-extinction device 18 of the electric arc extinguishing arc producing between the contact of fixed contact 15 and moving contact 16 when opened circuit action by switching mechanism; Zero phase current transformer 19; Over current trip 20(is with reference to Fig. 2) and leakage tripping device 21.
In addition, the symbol 22 of Fig. 2 is the printed base plates that are equipped with the circuit block of electric-leakage detection circuit 23 and leakage tests circuit 24, and the leakage tests circuit 24 that is equipped on this printed base plate 22 has Test Switchboard 25 and current-limiting resistance 26.
The Test Switchboard 25 of Fig. 2 comprises: the moving contact 28 of pair of fixed contacts 27a, 27b and the movement by button 35 and pair of contact 27a, 27b bridge joint.
As shown in Figure 3, be accommodated with on the top of the zero phase current transformer 19 of the inside of main body box 12 internal element 29 being formed by megohmite insulants such as synthetic resin materials herein.
This internal element 29 comprises: the unit box 30 that keeps printed base plate 22; With relative with the upper surface of printed base plate 22 and freely load and unload the unit cover 31 of the opening edge that is sticked in unit box 30.
As shown in Figure 5, at the upper surface of printed base plate 22, it is outstanding to unit cover 31 that the pair of pin terminal of drawing from zero phase current transformer 19 separates predetermined distance.These pair of pin terminals are pair of fixed contacts 27a, the 27b that form above-mentioned Test Switchboard 25.
As shown in Figure 5, in the unit cover 31 engaging with the opening edge of unit box 30, covering the position that 11 button inserting hole 11a is corresponding and be formed with button maintaining part 31a with being formed at.Button maintaining part 31a is the position of the tubular that is communicated with up and down, and in the button inserting hole 11a of this button maintaining part 31a and lid 11, the button 35 that forms above-mentioned Test Switchboard 25 is installed in the mode that can move to printed base plate 22.
In the end of the outstanding button 35 of the lower openings portion from button maintaining part 31a, be fixed with relative with pair of fixed contacts 27a, the 27b of printed base plate 22 conductive plate that can free strain, this conductive plate is the moving contact 28 that forms above-mentioned Test Switchboard 25.
In addition, be arranged on the button 35 in button maintaining part 31a and button inserting hole 11a, by enwinding spring axis direction each other consistent, be configured in the first wind spring 32 between moving contact 28 and unit cover 31 and be configured in unit cover 31 and button 35 between the spring force of the second wind spring 33, by the direction application of force to leaving from pair of fixed contacts 27a, 27b, therefore, the moving contact 28 of position of readiness is to be kept with the state of the lower surface butt of unit cover 31.
Distance (insulation distance) between moving contact 28 and pair of fixed contacts 27a, the 27b of this holding state is set as H1, H2.
In addition, box body of the present invention is corresponding with main body box 12.
The action of the residual current circuit breaker of present embodiment is then described.
In the time of leakage tests, in the time that the elastic force of opposing the first wind spring 32 and the second wind spring 33 is pressed button 35, as shown in Figure 6, moving contact 28 moves downwards together with button 35, by bridge joint between pair of fixed contacts 27a, 27b, make the leakage tests circuit 24 shown in Fig. 2 become "on" position.
Thus, flow through electric leakage analog current at zero phase current transformer 19, leakage tripping device 21 moves by following in this secondary output of zero phase current transformer 19, makes the residual current circuit breaker action of opening circuit, and fixed contact 15 and the moving contact 16 of main circuit contact are opened.
Herein, even be pressed into button 35 with brute force, the also deflection in strain of moving contact 28 contacting with pair of fixed contacts 27a, 27b, therefore can not apply excessive stress to pair of fixed contacts 27a, 27b.
In addition, when flow through the overcurrent of short circuit current or overload electric current between the main circuit terminal 13 of mains side and the main circuit terminal 14 of load-side time, fixed contact 15 and moving contact 16 are opened, and produce electric arc between the contact of fixed contact 15 and moving contact 16 simultaneously.This electric arc contact with the grid of arc-extinction device 18 and be cut off, cooling, realize in early days extinguishing arc.
Herein, the printed base plate 22 that is configured in the inside of main body box 12 is accommodated in airtight state in the internal element 29 that comprises unit box 30 and unit cover 31, does not therefore contact with the arcing gas being produced by arc-extinction device 18.
The effect of the residual current circuit breaker of present embodiment is then described.
The residual current circuit breaker of present embodiment is in the inside of main body box 12, and in internal element 29, with airtight state storage printed base plate 22, the carbon black containing in the arcing gas therefore being produced by arc-extinction device 18 can not be attached to the circuit of printed base plate 22.Therefore can improve the insulation property of printed base plate.
In addition, the Test Switchboard 25 of leakage tests circuit 24 can adopt following structure: be provided with pair of fixed contacts 27a, 27b at printed base plate 22, unit cover 31 sides at the internal element 29 of receiving this printed base plate 22 are provided with moving contact 28, therefore can realize the miniaturization of Test Switchboard 25.
And, so that pair of fixed contacts 27a, the 27b of printed base plate 22 to be set in the mode that is respectively arranged with the insulation distance of H1, H2 with the moving contact 28 that is arranged at unit cover 31 sides, even the therefore more small internal element 29 of the relative distance between printed base plate 22 and unit cover 31, also can guarantee the large insulation distance of H1+H2.
Further, even if brute force is pressed into button 35, contact with pair of fixed contacts 27a, 27b also deflection in strain of moving contact 28, can not apply excessive stress to pair of fixed contacts 27a, 27b, therefore can improve the durability of Test Switchboard 25.
Industrial utilizability
As mentioned above, residual current circuit breaker of the present invention, by preventing and the contacting of arcing gas, is useful for the insulation property that improve printed base plate.
Description of reference numerals
10 ... matrix; 11 ... lid; 11a ... button inserting hole; 12 ... main body box; 13 ... the main circuit terminal of mains side; 14 ... the main circuit terminal of load-side; 15 ... fixed contact; 16 ... moving contact; 17 ... lever; 18 ... arc-extinction device; 19 ... zero phase current transformer; 20 ... over current trip; 21 ... leakage tripping device; 22 ... printed base plate; 23 ... electric-leakage detection circuit; 24 ... leakage tests circuit; 25 ... Test Switchboard; 26 ... current-limiting resistance; 27a, 27b ... fixed contact; 28 ... moving contact; 29 ... internal element; 30 ... unit box; 30a～30e ... sidepiece partition wall; 30f～30h ... bottom partition wall; 31 ... unit cover; 31a ... button maintaining part; 32 ... the first wind spring; 33 ... the second wind spring; 35 ... button.
Claims (4)
1. a residual current circuit breaker, is characterized in that:
In box body, be assembled with main circuit contact, contact switching mechanism, the zero phase current transformer that is plugged in main circuit, leakage tripping device, arc-extinction device, be equipped with electric-leakage detection circuit and the printed base plate of the circuit block of leakage tests circuit and the push button Test Switchboard being connected with described leakage tests circuit
Have the internal element of described printed base plate to be accommodated in described box body in internal configurations, described internal element shields contacting of the arcing gas that produced by described arc-extinction device and described printed base plate.
2. residual current circuit breaker as claimed in claim 1, is characterized in that:
Described internal element comprises: cover the one side side of described printed base plate the unit box at the another side side opening of this printed base plate; With the unit cover that can load and unload Yi Jiang unit, the opening edge inner sealing that is sticked in this unit box,
Described push button Test Switchboard comprises: the fixed contact arranging at the another side that is disposed at the described printed base plate in described unit box; With the moving contact arranging on the button that is disposed at described unit cover, can move to described fixed contact by the push action of this button.
3. residual current circuit breaker as claimed in claim 2, is characterized in that:
Described fixed contact is provided with a pair of away from each other at the another side of described printed base plate,
Described moving contact is bridge joint between the front end of described button is by described pair of fixed contacts.
4. residual current circuit breaker as claimed in claim 3, is characterized in that:
By the described moving contact of bridge joint between described pair of fixed contacts be can strain conductive plate.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011249402A JP5866993B2 (en) | 2011-11-15 | 2011-11-15 | Earth leakage breaker |
| JP2011-249402 | 2011-11-15 | ||
| PCT/JP2012/006583 WO2013073103A1 (en) | 2011-11-15 | 2012-10-15 | Earth-leakage circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103843101A true CN103843101A (en) | 2014-06-04 |
| CN103843101B CN103843101B (en) | 2016-06-08 |
Family
ID=48429208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280048571.1A Active CN103843101B (en) | 2011-11-15 | 2012-10-15 | Residual current circuit breaker |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5866993B2 (en) |
| CN (1) | CN103843101B (en) |
| WO (1) | WO2013073103A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702529A (en) * | 2016-04-28 | 2016-06-22 | 德力西电气有限公司 | Circuit breaker electric leakage function switch structure and electric leakage circuit breaker with circuit breaker electric leakage function switch structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000003660A (en) * | 1998-06-15 | 2000-01-07 | Fuji Electric Co Ltd | Earth leakage breaker |
| CN101252063A (en) * | 2007-02-19 | 2008-08-27 | 富士电机机器制御株式会社 | Leakage tripping device for leakage breaker |
| CN101996827A (en) * | 2009-08-28 | 2011-03-30 | 李文俊 | Leakage protection circuit breaker with arc extinguishing chamber at both poles |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0638325B2 (en) * | 1987-04-15 | 1994-05-18 | 富士電機株式会社 | Zero-phase current transformer unit for earth leakage circuit breaker |
| JP3344059B2 (en) * | 1994-02-28 | 2002-11-11 | 松下電工株式会社 | Circuit breaker |
| JP2992448B2 (en) * | 1994-11-15 | 1999-12-20 | 松下電工株式会社 | Earth leakage breaker |
| JP3924963B2 (en) * | 1998-11-04 | 2007-06-06 | 富士電機機器制御株式会社 | Earth leakage breaker |
| JP4154860B2 (en) * | 2001-01-26 | 2008-09-24 | 富士電機機器制御株式会社 | Electric leakage detection circuit module for electric leakage breaker and method of manufacturing the same |
| JP4036317B2 (en) * | 2001-10-22 | 2008-01-23 | 河村電器産業株式会社 | Tracking breaker |
-
2011
- 2011-11-15 JP JP2011249402A patent/JP5866993B2/en active Active
-
2012
- 2012-10-15 CN CN201280048571.1A patent/CN103843101B/en active Active
- 2012-10-15 WO PCT/JP2012/006583 patent/WO2013073103A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000003660A (en) * | 1998-06-15 | 2000-01-07 | Fuji Electric Co Ltd | Earth leakage breaker |
| CN101252063A (en) * | 2007-02-19 | 2008-08-27 | 富士电机机器制御株式会社 | Leakage tripping device for leakage breaker |
| CN101996827A (en) * | 2009-08-28 | 2011-03-30 | 李文俊 | Leakage protection circuit breaker with arc extinguishing chamber at both poles |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702529A (en) * | 2016-04-28 | 2016-06-22 | 德力西电气有限公司 | Circuit breaker electric leakage function switch structure and electric leakage circuit breaker with circuit breaker electric leakage function switch structure |
| CN105702529B (en) * | 2016-04-28 | 2018-08-28 | 德力西电气有限公司 | A kind of breaker leakage function construction of switch and the leakage circuit breakers with it |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5866993B2 (en) | 2016-02-24 |
| CN103843101B (en) | 2016-06-08 |
| WO2013073103A1 (en) | 2013-05-23 |
| JP2013105644A (en) | 2013-05-30 |
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Address after: Saitama Prefecture, Japan Patentee after: FUJI ELECTRIC FA COMPONENTS & SYSTEMS Co.,Ltd. Address before: Tokyo, Japan Patentee before: FUJI ELECTRIC FA COMPONENTS & SYSTEMS Co.,Ltd. |
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