CN1486500A - Electrical circuit breaker - Google Patents
Electrical circuit breaker Download PDFInfo
- Publication number
- CN1486500A CN1486500A CNA018219608A CN01821960A CN1486500A CN 1486500 A CN1486500 A CN 1486500A CN A018219608 A CNA018219608 A CN A018219608A CN 01821960 A CN01821960 A CN 01821960A CN 1486500 A CN1486500 A CN 1486500A
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- Prior art keywords
- base
- contact
- arc
- circuit
- breaker
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/06—Housings; Casings; Bases; Mountings
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- 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
- H01H2009/0077—Details of switching devices, not covered by groups H01H1/00 - H01H7/00 using recyclable materials, e.g. for easier recycling or minimising the packing material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/025—Constructional details of housings or casings not concerning the mounting or assembly of the different internal parts
- H01H71/0257—Strength considerations
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- Breakers (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
A circuit breaker having excellent heat resistance arc resistance and over travel characteristics between contact points and suitable to recycle or reuse; The circuit breaker comprises mechanisms (7 28 29 31 32) for opening/closing holders (6 26) holding movable contacts (5 25) rotatably and bases (2 21) for holding the holders (6 26) rotatably and also holding fixed side contacts (10 23); When an overcurrent is detected the movable contacts (5 25) are rotated and an arc generated between contacts points is extinguished by arc extinguishers (9 34); The bases (2 21) are insulating moldings principally comprising crystalline thermoplastic resin irradiated with an electron beam after molding;
Description
Technical field
The present invention relates to when detecting overcurrent, to make movable contact to rotate and utilize arc-extinction device will occur in the circuit-breaker that electric arc between contact gives extinguishing arc.
Background technology
The base of circuit-breaker in the past, owing to can more easily reach the requirement of thermal endurance, arc resistance, mechanical strength etc., so use morely with the material of thermosetting resin as main component., thermosetting resin, needs such as cast gate that produces during to the overlap that produces when being shaped, injection molded and runner gate burn or bury, to overlap, cast gate, runner gate etc. carry out recirculation or again utilization be difficult.
In addition, also having studied employing is the drip molding of main component with the thermoplastic resin.For example, the thermoplastic resin that containing shown in the Japanese patent laid-open 08-171847 communique is made of nylon 6, nylon 66, nylon MXD 6 and carrying out the inorganic compound of dehydration and the drip molding of strengthening material more than 200 ℃, excellent insulation performance after its flame retardancy and electrode open and close is suitable for the drip molding of using as circuit-breaker., when being applied to the base of the bigger circuit-breaker of rated current, as the desired characteristic of base, especially thermal endurance is inadequate.
Experiment according to inventor etc., to drive the circuit-breaker that the base of putting down in writing on the flat 08-171847 communique (fusing point that becomes the nylon 6 of main resin is about 215 ℃) is used for 225 amperes of frameworks, rated current 225A above-mentioned spy, carry out the overload open-circuit test (with 6 times of tests of switching on, opening circuit (JIS C8370 and C8371) of rated current, at this moment, pass to the electric current of 225A * 6=1350A), surpassed distance value between contact reduces, and the contact pressure between contact reduces sometimes unusually.At this moment, be judged to be: the near surface that will be fixed in the base that the contact of base side fixed is melted.Why these surpassed distance values reduce, the contact pressure between contact reduces, near the position fusing of base, can think that the electric arc heating that takes place along with opening circuit is a main cause.And, when near the fusing of the position of the base of fixing fixed contact therefor, not only the contact pressure between contact becomes unstable, and owing to open and close repeatedly, might cause that also contact site with the fixing fixed contact therefor of base deforms and the surpassed distance value is reduced.
Here, so-called surpassed distance value is under the contact state of contact, remove the contact of fixation side after, the contact of movable side is to the amount of the contact side shifting of fixation side, sets the several times of connection point thickness in order to make contact pressure keep certain with having rich amount.And, the works of retaining contact, for example base, movable contact, fixed contact therefor etc. are subjected to its counter-force in order to keep the contact pressure between contact, and because of this counter-force can cause the works distortion, for example deformation of creep is so reduce the surpassed distance value after in a few years.
Again as thermoplastic resin, also be same during as main component with polybutylene terephthalate's (being called for short about 220 ℃ of PBT, fusing point) and polyethylene terephthalate's (being called for short about 255 ℃ of PET, fusing point).
Therefore,, carry out same overcurrent trip test, same problem also takes place even resin is changed to more dystectic polyphenylene sulfide (being called for short about 290 ℃ of PPS, fusing point).
The summary of invention
The present invention makes in order to address the above problem, its purpose is, obtains thermal endurance and arc resistance excellence, circuit-breaker that especially take place when being subjected to overcurrent trip or its also rare fusing and thermal deformation repeatedly and during the elevated temperature heat process that takes place.
In addition, movable contact is rotated and utilize arc-extinction device to occur in and the contact relative position of this movable contact on other contact between electric arc give in the circuit-breaker of extinguishing arc, owing to use the crystalline thermoplastic resin as main resin and after shaping, implement the drip molding of the insulating properties of electron beam irradiation, even so when being subjected to the elevated temperature heat process, also rare fusing and thermal deformation and can obtain the circuit-breaker of arc resistance excellence.
In addition, circuit-breaker of the present invention is owing to have: movable contact and the switching mechanism that can keep the maintenance support of this movable contact are rotationally arranged; Be provided with other contact and arc-extinction device, and can keep above-mentioned maintenance support rotationally and keep the base of above-mentioned other contact; Cover the outer cover of this base, formation basket, drip molding is above-mentioned base, so the surpassed distance excellent between thermal endurance and contact.
In addition, have owing to base: dispose the bottom that keeps support, other contact and arc-extinction device; And with this bottom quadrature setting, with the outside side walls that constitutes the border, on irradiation electronics line on the bottom of above-mentioned base, above-mentioned side walls, do not shine the electronics line at above-mentioned base, therefore, press excellence aspect the resistance to impact that rises in the thermal endurance of the electric arc when electric arc takes place heating and the basket.
In addition, because disposing, base keeps support, other contact and arc-extinction device in the configuration portion set along the plane of rotation of movable contact, and in this configuration portion, carry out electron beam irradiation, so thermal endurance and arc resistance aspect excellence, and can carry out meticulous processing, can help the miniaturization of external diameter and the densification of part.
In addition, because relative resinous principle 100 weight portions of drip molding contain the strengthening material of 60～200 weight portions, thus rare fusing and thermal deformation, and arc resistance and excellent strength.
The simple declaration of accompanying drawing
Fig. 1 is the diagrammatic sketch of the circuit-breaker outward appearance of expression the invention process form 1.
Fig. 2 is the diagrammatic sketch behind the declad from the outside drawing of Fig. 1.
Fig. 3 is the outside drawing of the maintenance support of Fig. 2.
Fig. 4 is the cutaway view after the contact portions of Fig. 1 is amplified.
Fig. 5 is the vertical view of the base of modal representation Fig. 1.
Fig. 6 is the key diagram to base irradiation electronics line shown in Figure 5.
The diagrammatic sketch of the position relation of base when Fig. 7 is the irradiation electronics line of Fig. 6 and electronics line shielding anchor clamps.
Fig. 8 is another routine diagrammatic sketch of the electron beam irradiation anchor clamps of Fig. 6.
Fig. 9 is another routine diagrammatic sketch of the electron beam irradiation anchor clamps of Fig. 6.
Figure 10 is the diagrammatic sketch of 225 amperes of frameworks of example 1 of the present invention with the mould of base shaping usefulness.
Figure 11 is the outside drawing of the circuit-breaker of the invention process form 2.
Figure 12 is the key diagram that expression cuts Figure 11 circuit-breaker part.
The best example of invention
Example 1
Fig. 1 is the outside drawing of the circuit-breaker of expression the invention process form 1, Fig. 2 is the diagrammatic sketch behind the declad from the outside drawing of Fig. 1, Fig. 3 is the outside drawing of the maintenance support of Fig. 2, and Fig. 4 is the cutaway view after the contact portions of Fig. 1 is amplified, and Fig. 5 is the vertical view of the base of modal representation Fig. 1.
Among the figure, the 1st, circuit-breaker, the 2nd, the base that forms by the resin molded part of insulating properties, the 3rd, form by the resin molded part of insulating properties, covering base 2 also utilizes base 2 to form the outer cover of basket, the 4th, from the outside of outer cover 3 by switching mechanism 7 with keep support 6 and handle that movable contact 5 is opened and closed, the 6th, movable contact 5 is remained on maintenance support on the movable piece maintaining part 6A (Fig. 3) rotationally, the 7th, metal framework 7A is bearing on the base 2, and driven for opening and closing keeps the switching mechanism of support 6, the 8th, detection of excessive current and the over-current detector that switching mechanism is tripped, the 9th, to occurring in contact 5A, electric arc between 10A carries out the arc-extinction device of extinguishing arc, utilizes the grid side plate 9B of insulating properties to support a plurality of metal extinguishing arc flase floor 9A (Fig. 4).The 10th, be provided with the base side contacts part (being equivalent to fixed contact therefor) of the contact 10A relative with travelling contact 5A, the 11st, can be around fulcrum post 12 support plinth side contacts part 10 and form the supporting member of circuit rotationally, the 13rd, the flexible copper cord that supporting member 11 and fixed conductor 14 are electrically connected, the 15th, cover the insulating component of fixed conductor 14.
Then, base 2 is described in detail.
On base 2, upward dispose base side joint point 10A at its bottom 2C (Fig. 5, Fig. 7) by switching mechanism 7, over-current detector 8, arc-extinction device 9, supporting member 11, on terminal maintaining part 2D, 2E, dispose terminal board 14A, 16 (Fig. 4, Fig. 2), in addition, with keeping the bracket supports 2F of portion supporting to keep the rotating shaft 6B (Fig. 3) of support 6.In them, it is 2G's (Fig. 5) and constitute the side walls 2A on border with bottom 2 quadratures of base 2 with the outside and with the alternate 2B of partition mutually that is insulated that arc-extinction device 9 and base side joint point 10A are provided with as be subjected to the bigger zone number of electric arc warming-up effect near betiding the electric arc between contact 5A and 10A in one piece.In addition, at the support of the contact site of the support 11 of the base side contacts part 10 that is provided with contact 10A, switching mechanism, keep acting on bigger power on the support of rotating shaft 6B of support 6.
The crystalline thermoplastic resin is not limited especially so long as crystalline, considers that preferably heat-resisting continuous serviceability temperature is polyester, the polyamide more than 120 ℃ from circuit-breaker will using continuously over 10～15 years on the market.From the minimum aspect of moisture absorption influence is considered, polyester preferably, and can use polyethylene terephthalate (PET) and polybutylene terephthalate (PBT).In addition, though their synthetic also can.From follow the tracks of (Japanese: ト ラ ッ キ Application グ) performance and open circuit after the good aspect of insulation property consider preferably there is not the resin of phenyl ring, polyamide for example, and can use nylon 12, nylon 6, nylon 66 etc.
Crosslinking accelerator is that the main irradiation electronics line that utilizes promotes that carrying out crosslinked to the noncrystalline position in the crystalline thermoplastic resin is purpose, and adds 0.5～2 part.As crosslinking accelerator, preferably for example as multi-functional monomer, ト リ ア リ Le イ ソ シ ア ネ レ one ト (be called for short TAIC), ト リ ス Ha イ De ロ オ キ シ エ チ Le イ ソ シ ア ヌ リ Star Network ア Network リ レ one ト (being called for short THEICA), ト リ ス Ha イ De ロ オ キ シ エ チ Le イ ソ シ ア ヌ リ Star Network メ Network リ レ one ト (being called for short THEICM), ト リ メ チ ロ one Le プ ロ パ Application ト リ ア Network リ レ one ト (being called for short TMPTA).Also can will add after their combinations.
From considering, preferably add TAIC or THEICA with the high aspect of the gel component rate of identical irradiation electronics line amount.
Preventing oxidant, is when the material mix, is purpose to prevent the crosslinking accelerator self-crosslinking, and adds 0.2～0.9 part.Add 0.4～0.6 part better.As preventing oxidant, preferably for example hindered phenol system prevents oxidant, can enumerate japanese name and be: 2,6-ジ-t-Block チ Le-P-Network レ ゾ one Le (being called for short BHT); ト リ エ チ レ Application グ リ コ one Le-PVC ス [3-(3-t-Block チ Le-5-メ チ Le-4-ヒ De ロ キ シ Off エ ニ Le) プ ロ ピ オ ネ one ト]; 1,6-ヘ キ サ Application ジ オ one Le-PVC ス [3-(3,5-ヅ-t-Block チ Le-4-ヒ De ロ キ シ Off エ ニ Le) プ ロ ピ オ ネ one ト]; ペ Application エ リ ス リ チ Le テ ト ラ キ ス [3-(3,5-ジ-t-Block チ Le-4-ヒ De ロ キ シ Off エ ニ Le) プ ロ ピ オ ネ one ト]; N, N '-ヘ キ サ メ チ レ Application PVC ス (3,5-ヅ-t-Block チ Le-4-ヒ De ロ キ シ-ヒ De ロ Star Application Na マ ミ De); 3,5-ジ-t-Block チ Le-4-ヒ De ロ キ Star ベ Application ヅ Le Off オ ス Off オ ネ one ト-ジ エ チ Le エ ス テ Le etc.
These can add with monomer, also can add in combination.
As strengthening material, can glass fibre be representative.Glass fibre is the fibrous material that so-called glass constitutes, and can enumerate E glass, S glass, D glass, T glass or silica glass etc. as frit.Generally as can be known, glass fiber diameter is 6～13 μ m, and aspect ratio is more than 10, is best from improving impact strength.
The filler of inanimate matter can be enumerated aluminium oxide, calcium carbonate, mica, clay, talcum powder, kaolin, wollastonite etc.
As nonflammable material, can enumerate red phosphorus system, phosphoric acid fat system, halogen system etc., from the minimum aspect of full genus corrosion based on contact 5A, 10A, preferably phosphoric acid fat system, halogen system.In addition, compare with phosphorus from seeing preferably phosphoric acid fat system, halogen system with less addition performance flame retardancy aspect.In addition, compare from bringing into play the flame retardancy aspect with phosphoric acid fat system, preferably halogen system with less addition.In addition, even be trapped in occasion in the working cylinder when being shaped,, be best with the dibromo polystyrene from the aspect that difficulty is decomposed.
As difficulty combustion auxiliary material, from increasing the aspect of effect at double that is with halogen, antimony trioxide is best.
Then, the irradiation electronics line of subtend base describes.
Fig. 6 is the ideograph to base shown in Figure 5 irradiation electronics line, the diagrammatic sketch that the base when Fig. 7 is the irradiation electronics line of presentation graphs 6 and the position of electronics line shielding anchor clamps concern, and Fig. 8 and Fig. 9 are another routine diagrammatic sketch of the electron beam irradiation anchor clamps of presentation graphs 6.
Among the figure, the 40th, the electron beam irradiation device; The 41st, the electronics line; The 50th, electronics line shielding anchor clamps for example are provided with the through hole 51 that electronics line 41 is passed through on the steel plate of thickness of slab 4mm.Through hole 51 as shown in Figure 7, the relative bottom 2C opening of base 2, in addition, the side walls 2A of base 2 and terminal board maintaining part 2D, 2E are covered by electronics line shielding anchor clamps 50.In addition, Fig. 6 is expression electronics line shielding anchor clamps 50 and the example that base 2 separates, and be placed on the base 2 but also can directly the electronics line be shielded anchor clamps 50.
By the electronics line 41 of electron beam irradiation device 40 irradiations parallel to each other, be radiated at as the crow flies on the base 2 as irradiated body, and see through bottom 2C.Utilize electronics line shielding anchor clamps 50, the bottom surface 2C of base 2 carries out crosslinked, in addition, side walls 2A and terminal board maintaining part 2D, 2E are because electronics line 41 cresteds and not crosslinked, generally, the crystalline thermoplastic resin contains the amorphism part according to the ratio of degree of crystallization, if when electronics line 41 is radiated at drip molding (base 2) and goes up, makes amorphism in the drip molding partly carry out crosslinked and forms the three dimensional network pore structure.
For this drip molding resin material, except constitute common resin material with basic resin, strengthening material, inorganic filling material, nonflammable material, difficult combustion auxiliary material etc., also can add crosslinking accelerator, prevent oxidant.
Utilize the irradiation of electronics line 41, it is crosslinked that amorphism is partly carried out, but owing to exist the problem that electronics can remain in drip molding inside when not connecting drip molding when the weak strength of electronics line 41, so require electronics line 41 to have the intensity of perforation drip molding.
The accelerating voltage of irradiation electronics line from the 2mm thickness of slab that makes the bottom 2C that connects base 2 and can carry out crosslinked condition, is preferably more than the 2MV, and for the electronics line that does not make irradiation remains in the material as space charge, so be optimum with 3～5MV.
In addition, from the viewpoint that prevents that the electronics line is residual, on the phase partition 2B beyond the maintenance bracket supports 2F of portion of the thin thickness part, preferably do not shine the electronics line, promptly, such as electronics line shielding anchor clamps 55,56 (Fig. 8, Fig. 9), preferably use the anchor clamps of the shape of covering with the whole of phase partition 2B or except the phase partition 2B of the maintenance bracket supports 2F of portion partly.
Under closed circuit state shown in Figure 4, when overcurrent took place, over-current detector detected overcurrent, and gives trip command to switching mechanism 7.Thus, switching mechanism 7 utilizes the power that saves up strength of toggle link linkage, make to keep support 6 in Fig. 2, Fig. 4, counterclockwise to rotate, movable contact 5 also with this to the equidirectional rotation that keeps support 6, contact 5A, 10A divide and open and between contact 5A, 10A electric arc takes place.This electric arc is by arc-extinction device 9 electromagnetic attractions and extinguishing arc.In addition, when overcurrent is very big, before the disconnection action of switching mechanism 7, utilize the electromagnetism repulsion force that contact 5A, 10A are disconnected.The zone that is subjected to very big thermal impact because of electric arc when this electric arc takes place is the regional 2G (Fig. 5) that is provided with arc-extinction device 9 and contact 5A, 10A.In addition, at the support of the framework 7A of the contact site 2G of the support 11 of the base side contacts part 10 that is provided with contact 10A, switching mechanism 7, keep acting on big power on the support of rotating shaft 6B of support 6.
As described above, because with the base 2 of crystalline thermoplastic resin as main resin and the insulating properties after using irradiation electronics line after the shaping, so have the advantage of recirculation of the retrofit, cast gate, runner gate etc. of thermoplastic resin, and can obtain the base 2 of thermal endurance and arc resistance excellence.In addition, even be subjected to the thermal process of high temperature, therefore also rare fusing and thermal deformation, and creep resistant excellence can obtain for the little base 2 of the influence of the contact pressure between contact 5A, 10A.In addition, on the maintenance bracket supports 2F of portion of phase partition 2B, also shine the electronics line, the surpassed distance excellent between thermal endurance, contact.
In addition, drip molding is when resinous principle 100 weight portions contain the strengthening material of 60～200 weight portions relatively, because fusing and the thermal deformation and the creep resistant excellence of rare base 2, intensity is also excellent, so the situation that contact pressure reduces is especially fewer.Like this, the structural material with the strengthening material that contains volume is being used to be subjected to local power and when this place's effect has the base 2 of arc heat two such high temperature, is being very useful.
In addition, because that the bottom 2C of base 2 carries out is crosslinked, side walls 2A is not crosslinked because of covering the electronics line, so when the overload of circuit-breaker is opened circuit, become bottom 2 fusings of base 2 of high heat and the situation of thermal deformation easily and just lack the creep resistant excellence.Side walls, on the contrary when because of the crosslinked situation that has when impact property is reduced the interior pressure that takes place when being subjected to sustain damage at short interruption, but because base side walls 2A is not crosslinked, the resistance to impact excellence, so can obtain to have concurrently the base 2 of thermal endurance and resistance to impact.
Embodiment 1
Below, specify embodiments of the invention, but the invention is not restricted to present embodiment.In embodiment 1, the circuit-breaker that 225 amperes of frameworks are used describes.
Figure 10 is the diagrammatic sketch of 225 amperes of frameworks of embodiments of the invention 1 with the mould of base shaping usefulness.In Figure 10, the 90th, but constituting by fixed die 90A and dynamic model 90, its inside is along the formed mould of the shape of base 2.The 91st, the inlet of formed composite material in fixed die 90A.Inlet 91 from the center that composite material is positioned at fixed die 90A, but in 85～95 ℃ of dynamic model temperature, 85～95 ℃ of fixed die temperature, 230～280 ℃ of working cylinder temperature, dwell time and add up to inject time under 10 seconds the condition, base 2 is shaped by 250 tons of injection molding machines.
Then, represent in the method for this drip molding at Fig. 6, shield under the state of anchor clamps 50 coverings with the electronics line made of iron of thickness 4mm at side surface part 2A, 2D, 2E (Fig. 5), shine the electronics line with accelerating voltage 2MV with novel high voltage electron beam irradiation device with the four directions.
Then, decision method and result thereof are described.
Use is shaped by said method and shines base (11)～(15) assembling circuit circuit breaker (225 amperes of frameworks) behind the electronics line, and carries out the overload open-circuit test (with 6 times (225A * 6=1350A) switch on) of rated current.
After the test, with near the unfused situation in top layer of the contact site of fixed contact therefor and (support 11 of the base side contacts part 10 among Fig. 5 and as the part of the regional 2G of the bottom 2C of base 2) thereof as qualified, with the situation after the fusing as defective.
Represent result of the test in table 1～table 2, the resin in the table becomes the umber that also comprises nonflammable material and difficult combustion auxiliary material.In sample (11)～(15), comparative example (21)～(24), added 15 parts of dibromo polystyrene as nonflammable material, added 5 parts of antimony trioxides as difficulty combustion auxiliary material.In addition, in sample (11)～(15), comparative example (22), (24), added ト リ ア リ Le イ ソ シ ア ネ レ one ト (being called for short TAIC) as crosslinking accelerator; As preventing that oxidant from having added 2,6-ヅ-t-Block チ Le-P-Network レ ゾ one Le (being called for short BHT).In addition, in sample (14)～(15), comparative example (23), (24), contain 8 parts of ethylene/propylene copolymer bodies as impact absorbing material.
In addition, to sample (11)～(15), comparative example (21), (23) irradiation electronics line, the electronics line is not shone in comparative example (22), (24).
(table 1)
| Distinguish | Sample | Comparative example | ||||
| No | ??(11) | ??(12) | ??(13) | ??(21) | ??(22) | |
| Resin | Nylon 6 (55 parts) | Nylon 6 (55 parts) | Nylon 6 (55 parts) | Nylon 6 (55 parts) | Nylon 6 (55 parts) | |
| Strengthening material | Glass fibre (33 parts) | Glass fibre (45 parts) | Glass fibre (110 parts) | Glass fibre (45 parts) | Glass fibre (45 parts) | |
| Inanimate matter | Do not have | Do not have | Do not have | Do not have | Do not have | |
| Crosslinking accelerator | TAIC (0.5 part) | TAIC (1 part) | TAIC (2 parts) | Do not have | TAIC (1 part) | |
| Antioxidant | BHT (0.5 part) | BHT (0.7 part) | BHT (0.7 part) | Do not have | BHT (0.7 part) | |
| Irradiation electronics line | Have | Have | Have | Have | Do not have | |
| Judge | Qualified | Qualified | Qualified | Defective | Defective | |
(table 2)
| Distinguish | Sample | Comparative example | |||
| No | ??(14) | ??(15) | ??(23) | ???(24) | |
| Resin | Nylon 6 (30 parts) | Nylon 6 (30 parts) | Nylon 6 (55 parts) | Nylon 6 (30 parts) | |
| Impact absorbing material | Ethylene/propylene copolymer body (8 parts) | Ethylene/propylene copolymer body (8 parts) | Ethylene/propylene copolymer body (8 parts) | Ethylene/propylene copolymer body (8 parts) | |
| Strengthening material | Do not have | Do not have | Do not have | Do not have | |
| Inanimate matter | Talcum powder (45 parts) | Talcum powder (45 parts) | Talcum powder (45 parts) | Talcum powder (45 parts) | |
| Crosslinking accelerator | TAIC (05 part) | TAIC (1 part) | Do not have | TAIC (1 part) | |
| Antioxidant | BHT (0.5 part) | BHT (0.7 part) | Do not have | BHT (0.7 part) | |
| Irradiation electronics line | Have | Have | Have | Do not have | |
| Judge | Qualified | Qualified | Defective | Defective | |
As described above, the circuit-breaker of sample (11)～(15) that the base 2 that use is made of the nylon 6 composite material after having added crosslinking accelerator and having prevented oxidant is made, after the overload open-circuit test, can not melt near the fixed contact of base 2 and its, compare with the circuit-breaker of the base that does not use irradiation electronics line, thermal endurance and arc resistance are more excellent.Surpassed distance characteristic between the contact in the time of therefore, can easily estimating to use all the year round is also excellent.
In addition, use the circuit-breaker of sample (14)～(15), its resistance to impact is also excellent, especially in occasion with the base 2 of the die forming of Figure 10, the bottom 2C of base 2, the crosslinked mechanical strength that makes that utilization irradiation electronics line produces increases (but resistance to impact reduction), side wall portion 2A owing to not shining the electronics line and the resistance to impact excellence, so can also fully tolerate the rising of the interior pressure that produces along with the electric arc generation well.
In addition, do not shine comparative example (22), (24), the poor heat resistance of electronics line.
Below example 2 of the present invention is described.Figure 11 is the outside drawing of the circuit-breaker of example 2 of the present invention, and Figure 12 is the key diagram that expression cuts Figure 11 circuit-breaker part.
Among the figure, the 20th, the insulation basket is made of the base 21 and the outer cover 22 that form with the same material of the base 2 of explanation in example 1 and embodiment 1.Base 21 is by side surface part (configuration portion) 21A of a side of integrally formed formation forming circuit circuit breaker with from the outer peripheral edges of this side surface part 21A and the 21B of wall portion of this side surface part 21A quadrature.Plane of rotation at the movable contact 25 in the edge, inboard of side surface part 21 disposes arc-extinction device 38 and fixed contact therefor 23.Outer cover 22 forms tabulars, relatively is provided with the side surface part 21A of base 21 and the another side of forming circuit circuit breaker, utilizes screw or rivet to be fixed on the base 21.
In addition, the side surface part 21A of base 21 and outer cover 22 and example 1, embodiment 1 same irradiation electronics line.In addition, when base 21 is shone the electronics line, as shown in Figure 6, when the 21B of wall portion that uses electronics line shielding anchor clamps 50, makes the electronics line not exclusively be radiated at tubular goes up, be difficult to take place crackle and fragmentation with the part hardening within reason of outer cover 22 butts, so be desirable.In addition, consider, preferably do not use electronics line shielding anchor clamps 50 from the operating efficiency of irradiation electronics line.
In open circuit, be provided with fixed contact therefor 23, be fixed on fixed contact 24 on this fixed contact therefor 23, have with this fixed contact 24 relatively connect from the movable contact 25 of travelling contact 25a.The 26th, support the support arm (retaining member that keeps movable contact 25 rotationally) of this movable contact 25 integratedly, and the slotted hole 26c that forms U font groove 26a, block fastener 26 and engage with axle 27.
The 27th, become the axle of the center of rotation of support arm 26 (retaining member) and movable contact 25, be supported on the basket 20 that insulate.The 28th, 25 of movable contacts are set as from fixed contact 24 all the time to the main spring of the departure direction application of force, the 29th, form and carry out the handle of opening and closing operations from the outside with synthetic resin, the 30th, to the back-moving spring of handle 29 to the counter clockwise direction application of force, 31 operator link, the ends that pole is bent to form the U font engage with handle 29, the other end engages with the connecting rod slot 32a of lock bolt 32.In addition, handle 29 is made of the handle portion 29b outstanding outside insulation basket 20 and the protuberance 29c of attended operation connecting rod 31.
The 32nd, be supported on the lock bolt of axle on 27, the triggering sheet 32b of the pressing force of the bar 37 that be formed with the connecting rod slot 32a that engage with the other end of operator link 31, is subjected to electromagnetism trip portion 34, form and be subjected to pressing force that the bending by bimetallic 33 causes to the triggering sheet 32c that makes operator link 31 with the power of the direction that engages releasing of connecting rod slot 32a.In addition, between support arm 26 and lock bolt 32, be provided with back-moving spring 32d, make lock bolt 32 relative support arms 26 all the time to the counter clockwise direction application of force.Be embedded in the other end of the operator link 31 of U font groove 26a, utilize the elastic force of spring 32d to be clamped among the connecting rod slot 32a of lock bolt 32, become lock-out state.And travelling contact 25a relative fixed contact 24 Elastic Contact form open circuit (state of Figure 12).
Like this, utilize above-mentioned support arm 26, main spring 28, handle 29, back-moving spring 30, operator link 31, lock bolt 32 to constitute switching mechanism.
The 33rd, correspondingly with electrical current in Figure 12, be heated crooked bimetallic to right-hand; The 34th, electromagnetic trip device has: utilize the electromagnetic force that produces to electromagnet 35 energisings and driven slotting handful formula iron core 36; Utilize the attraction of this plunger 36 to move in Figure 12 to the outstanding bar 37 of left.Utilize bimetallic 33 and electromagnetic trip device 34 to form over current trip.The 38th, arc-extinction device, the 39th, the muffler plate of this arc-extinction device 38.The 40th, comprise the electric arc generation chamber of said fixing contact 24 and movable contact 25 can being full of the electric arc that takes place when movable contact 25 disconnects.The 41st, with the arc runner of electric arc to the direction guiding of arc-extinction device 38.
In the circuit-breaker that constitutes like this, if in circuit during short circuit current flow, the electromagnet 35 of electromagnetic trip device 34 works to its perception, attracts plunger 36, moves to left with the bar 37 of its interlock.So this triggering sheet 32b is pushed by bar 37, lock bolt 32 overcomes the elastic force of back-moving spring 32d and rotates to clockwise direction.The other end that utilizes connecting rod slot 32a to become the operator link 31 of locking state ground embedding in U font groove 26a rotates to clockwise direction by lock bolt 32, and support arm 26 becomes free state relatively.Therefore, the elastic force that support arm 26 utilizes as the main spring 28 of open mechanism is that the center forces to rotate the action of tripping to clockwise direction with axle 27.Like this, the disconnection at a high speed of movable contact 25 dos, the action of opening circuit.
Here, to from be provided on the base 21 part with stress in the part on the base 21, for example by integrally formedly be located at projection 21a, the handle bearing 21b of portion on the base 21, the support arm bearing 21c of portion, electromagnetism tripping operation fixed part 21d describe.
As described above since with electron beam irradiation on side surface part (configuration portion) 21A of base 21, so have the advantage of recirculation of the retrofit, cast gate, runner gate etc. of thermoplastic resin, and can improve thermal endurance and arc resistance.In addition, owing to also shine the electronics line on outer cover 22, thermal endurance and arc resistance improve.
In addition, as implement shown in the form 2, plane of rotation along movable contact 25, dispose the circuit-breaker of support arm 26, fixed contact therefor 23 and arc-extinction device 38, compare with the circuit-breaker that will keep support, other contact and arc-extinction device to be configured on the bottom of the such base of example 1, breaking capacity is less, and the energy of the electric arc that takes place when opening circuit is also less, and tends to the insulation drip molding of base 21 and outer cover 22 etc. is disposed at the position of more approaching electric arc.
And, because to the side surface part 21A of base 21 and outer cover 22 irradiation electronics lines, the mechanical strength that improves these parts, thermal endurance and arc resistance, so can also obtain to satisfy the pressure inside rising that causes for explosion pressure, reach for the tolerance that causes heating because of electric arc because of the generation of following electric arc.
In addition, because thermal endurance and arc resistance improve, so do not need the fixedly extinguishing arc sidewall of muffler plate 39 usefulness, can constitute arc-extinction device 38 by the groove that directly is embedded in base 21 and outer cover 22, can reduce the part number, and can increase the Width size (connect Figure 12 paper direction) of the circuit-breaker of muffler plate 39, can help improving the arc performance of electric arc.
In addition, projection 21a, the handle bearing 21b of portion, the support arm bearing 21c of portion and electromagnetism tripping operation fixed part 21d be also owing to improve mechanical strength by irradiation electronics line, so can remedy the shortcoming of shortcoming, especially nylon of the thermoplastic resin of, positioning accuracy difference softer than thermosetting resin.
In addition, in example 2, base 21 is described for flat situation for case shape, outer cover 22, but is not limited to this shape, the both sides of base 21 and outer cover 22 also but the shape of case shape.
In addition, circuit-breaker to one pole in the example 2 is described, but also can be the two polar circuit circuit breakers that the thickness direction that produces and be located at circuit-breaker between base 21 and the outer cover 22 is provided with two utmost points, in this occasion, also can be provided with to and the center base that insulate of two interpolars established, movable contact 25, handle 29, electromagnetic trip device 34 etc. are set on this center base.At this moment, center base can be used in the structure of using irradiation electronics line on the formed drip molding of composition identical with the base of example 2.
Utilizability on the industry
The present invention can be used in the process characteristic that requires between heat resistance, arc resistance and contact, and can recycle or recycle as the overlap of main component, cast gate, runner gate etc. and the drip molding that makes circuit-breaker uses with thermoplastic resin.
Claims (5)
1, a kind of circuit-breaker, movable contact is rotated and utilize arc-extinction device to make to occur in and the contact relative position of this movable contact on other contact between electric arc carry out extinguishing arc, it is characterized in that,
Use with the crystalline thermoplastic resin as main resin and after shaping, shine the drip molding of the insulating properties of electronics line.
2, circuit-breaker as claimed in claim 1 is characterized in that, circuit-breaker has: the switching mechanism that enables to keep rotationally the maintenance support of movable contact to open and close; Be provided with other contact and arc-extinction device, can keep above-mentioned maintenance support rotationally and keep the base of described other contact; Cover this base and constitute the outer cover of basket, drip molding is described base.
3, circuit-breaker as claimed in claim 2, it is characterized in that, base has the bottom that keeps support, dispose other contact and arc-extinction device, is provided with orthogonally with this bottom and with the side walls on formation border, outside, do not shine the electronics line shining on the bottom of described base on electronics line, the described side walls at described base.
4, circuit-breaker as claimed in claim 2 is characterized in that, base is to be used for configuration maintenance support, other contact and arc-extinction device in the configuration portion set along the plane of rotation of movable contact, and shines the electronics line in this configuration portion.
5, circuit-breaker as claimed in claim 1 is characterized in that, relative resinous principle 100 weight portions of drip molding contain the strengthening material of 60～200 weight portions.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2001/010134 WO2003044818A1 (en) | 2001-11-20 | 2001-11-20 | Circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1486500A true CN1486500A (en) | 2004-03-31 |
| CN1255839C CN1255839C (en) | 2006-05-10 |
Family
ID=11737951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB018219608A Expired - Fee Related CN1255839C (en) | 2001-11-20 | 2001-11-20 | Electrical circuit breaker |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1475817B1 (en) |
| JP (1) | JP4177255B2 (en) |
| KR (1) | KR100528152B1 (en) |
| CN (1) | CN1255839C (en) |
| DE (1) | DE60139216D1 (en) |
| TW (1) | TW526509B (en) |
| WO (1) | WO2003044818A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101707166B (en) * | 2009-09-29 | 2013-04-10 | 湖北盛佳电器设备有限公司 | Built-in B type intelligent circuit breaker with automatic closing function |
| CN109777052A (en) * | 2019-01-07 | 2019-05-21 | 宏秀电气有限公司 | One or two fusion device shell body materials |
| CN111684561A (en) * | 2018-06-26 | 2020-09-18 | Ls电气株式会社 | Arc extinguish chamber base of circuit breaker for wiring |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007042310A (en) * | 2005-08-01 | 2007-02-15 | Fuji Electric Fa Components & Systems Co Ltd | Switching/control device |
| JP4655094B2 (en) | 2008-02-08 | 2011-03-23 | 富士電機機器制御株式会社 | Arc extinguishing resin processed product and circuit breaker using the same |
| CN101604600B (en) * | 2009-06-05 | 2012-10-03 | 上海诺雅克电气有限公司 | Multi-stage breaker with auxiliary supports |
| JP7079578B2 (en) * | 2017-08-22 | 2022-06-02 | ポリプラスチックス株式会社 | Flame-retardant polybutylene terephthalate resin composition |
| CN114171348B (en) * | 2021-12-07 | 2024-10-11 | 山西汾西重工有限责任公司 | Contact group assembling device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54131689A (en) * | 1978-04-03 | 1979-10-12 | Teijin Ltd | Preparation of crosslinked aromatic polyester |
| JP2901249B2 (en) * | 1988-07-23 | 1999-06-07 | 出光興産株式会社 | Styrene polymer molded article and method for producing the same |
| JPH06251688A (en) * | 1993-02-26 | 1994-09-09 | Toshiba Lighting & Technol Corp | Terminal device and circuit breaker |
| JPH0721897A (en) * | 1993-06-29 | 1995-01-24 | Fuji Electric Co Ltd | Circuit breaker |
| CH689681A5 (en) * | 1994-01-13 | 1999-08-13 | Schurter Ag | Electrical fuse and method for its production. |
| JP3418848B2 (en) * | 1994-08-23 | 2003-06-23 | 財団法人歯友会 | Plastic molded products modified by radiation |
| JP2001176372A (en) * | 1999-12-21 | 2001-06-29 | Mitsubishi Electric Corp | Circuit breaker |
| JP2001307612A (en) * | 2000-04-21 | 2001-11-02 | Kawamura Electric Inc | Circuit breaker |
-
2001
- 2001-11-20 WO PCT/JP2001/010134 patent/WO2003044818A1/en active IP Right Grant
- 2001-11-20 DE DE60139216T patent/DE60139216D1/en not_active Expired - Lifetime
- 2001-11-20 KR KR10-2003-7009255A patent/KR100528152B1/en active IP Right Grant
- 2001-11-20 JP JP2003533387A patent/JP4177255B2/en not_active Expired - Fee Related
- 2001-11-20 EP EP01982867A patent/EP1475817B1/en not_active Expired - Lifetime
- 2001-11-20 CN CNB018219608A patent/CN1255839C/en not_active Expired - Fee Related
- 2001-11-29 TW TW090129499A patent/TW526509B/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101707166B (en) * | 2009-09-29 | 2013-04-10 | 湖北盛佳电器设备有限公司 | Built-in B type intelligent circuit breaker with automatic closing function |
| CN111684561A (en) * | 2018-06-26 | 2020-09-18 | Ls电气株式会社 | Arc extinguish chamber base of circuit breaker for wiring |
| US11764019B2 (en) | 2018-06-26 | 2023-09-19 | Ls Electric Co., Ltd. | Arc extinguishing chamber base of molded case circuit breaker |
| CN109777052A (en) * | 2019-01-07 | 2019-05-21 | 宏秀电气有限公司 | One or two fusion device shell body materials |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1475817B1 (en) | 2009-07-08 |
| TW526509B (en) | 2003-04-01 |
| KR100528152B1 (en) | 2005-11-15 |
| WO2003044818A1 (en) | 2003-05-30 |
| EP1475817A4 (en) | 2008-04-16 |
| JPWO2003044818A1 (en) | 2005-03-24 |
| JP4177255B2 (en) | 2008-11-05 |
| DE60139216D1 (en) | 2009-08-20 |
| KR20040021583A (en) | 2004-03-10 |
| CN1255839C (en) | 2006-05-10 |
| EP1475817A1 (en) | 2004-11-10 |
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Granted publication date: 20060510 Termination date: 20201120 |