CN105280450B - Circuit-breaker - Google Patents
Circuit-breaker Download PDFInfo
- Publication number
- CN105280450B CN105280450B CN201410659078.4A CN201410659078A CN105280450B CN 105280450 B CN105280450 B CN 105280450B CN 201410659078 A CN201410659078 A CN 201410659078A CN 105280450 B CN105280450 B CN 105280450B
- Authority
- CN
- China
- Prior art keywords
- circuit
- side terminal
- load side
- 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.)
- Active
Links
Classifications
-
- 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
- H01H73/36—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 having electromagnetic release and no other automatic release
-
- 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
-
- 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
-
- 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
- H01H73/48—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 having both electrothermal and electromagnetic automatic release
- H01H73/50—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 having both electrothermal and electromagnetic automatic release reset by lever
Abstract
The present invention obtains a kind of circuit-breaker, it can prevent the unnecessary action as caused by starting surge current and starting current.Circuit-breaker (1) has a bypass resistance, which, which has, is arranged to contact with load side terminal (6) and separated 2nd bimetallic piece (29).2nd bimetallic piece (29) acts as follows, i.e., when circuit-breaker (1) is connected or during the power on of motor, contacted with the contact site (6a) of load side terminal (6) and flow through electric current in parallel with tripgear (2), if reach set point of temperature, then separated with load side terminal (6), make electric current flowing only in tripgear (2).
Description
Technical field
- the electricity of electromagnetic type or complete electromagnetic type is moved the present invention relates to a kind of heat being installed in Inturruptor for sub-line etc.
Circuit breaker.
Background technology
The tripgear of the circuit-breaker of existing hot dynamic-electromagnetic type, as Patent Document 1, has：Fixed iron core
And movable core, they are formed by magnetic materials such as iron plates；And bimetallic piece, it is that clamping adds between fixed iron core
Hot device and integratedly by fixed flat heat responsive element.
In such circuit-breaker, if electric current flows in conductor and the heater being connected with shunt terminal,
Produce the magnetic flux passed through from fixed iron core and movable core.When by tripping caused by electromagnetism, utilize what is produced by the magnetic flux
Attraction, movable core overcome the elastic force of resetting spring and are attracted to fixed iron core, disconnected automatically.In addition, passing through
Caused by heat is dynamic during tripping, using the flexure operation of bimetallic piece, the trip(ping) bar of open-close mechanism section is rotated, and is carried out from dynamic circuit breaker
Open.
However, in motor circuit, in general, the overload protection of motor is carried out by electromagnetism shutter, circuit breaker
Device is set for the purpose of the short-circuit protection of circuit.But for the purpose of economy, exist and be known as motor cutter as follows
Breaker, it not only carries out overload protection and short-circuit protection, also carries out the starting of motor, stops, it is in rated specification
Used in the motor of relatively low (for example, being less than or equal to 225A).
Patent document 1：Japanese Unexamined Patent Publication 8-96689 publications
In existing circuit-breaker as described above, there are the following problems, i.e. in motor starting, produce by
The very big electric current only flowed in 1 initial ripple starts the unnecessary dynamic of instantaneous trip apparatus caused by surge current
Make, is excessively electric as caused by the starting current flowed after the starting surge current in motor starting during multiple cycles
The unnecessary action of tripgear is flowed, circuit is switched off automatically, and can not normally carry out the starting and stopping of motor.With near
A little years are international to prevent that the movement of global warming from be background, is promoting the use of more efficient motor, it is unrestrained to there is starting
The problem of gushing the tendency that electric current also becomes larger, becoming to use accordingly, there exist existing motor cutter.
In addition, if the unnecessary action as caused by starting surge current in order to prevent, makes the instantaneous jump of circuit-breaker
Brake current value increases, then the conducting parts such as heater of circuit breaker internal are possible to fuse.If in order to prevent the fusing and make to lead to
The capacity increase in electric portion, then can not obtain tripping characteristic.Due to there are such trade-off relation, consequently it is difficult to realize at the same time true
Protect tripping characteristic and the unnecessary action as caused by starting surge current does not occur, here it is the problem of available circuit breaker.
The content of the invention
The present invention is exactly to propose to solve problem as described above, and its object is to obtain a kind of circuit breaker
Device, the circuit-breaker can prevent the unnecessary action as caused by starting surge current and starting current.
Circuit-breaker according to the present invention has：Fixed contact therefor, it is connected with power supply side terminal；Mobile contact
Part, it is arranged to contact and separate with the fixed contact therefor；Over current trip, it configures in movable contact and bears
Between carrying side terminal, if flowing through the overcurrent more than or equal to the setting set out based on rated current, carry out certainly
Dynamic circuit breaker is opened；And bypass resistance, it is connected in parallel with switch portion, switch portion with over current trip, be arranged to
Load side terminal contacts and separation, and in the circuit-breaker, the switch portion of bypass resistance proceeds as follows action, i.e.
In the power on of load, contacted with load side terminal and flow through electric current in parallel with over current trip, if electric current
Within the prescribed limit for reaching rated current, then separated with load side terminal, electric current is only flowed in over current trip.
The effect of invention
According to the present invention, since in the power on of load, the switch portion of bypass resistance is contacted with load side terminal, and
Electric current is flowed through in parallel with tripgear, therefore, it is possible to reduce the electric current flowed in over current trip, can be prevented
The unnecessary action as caused by starting surge current and starting current.In addition, if electric current reaches the prescribed limit of rated current
Within, then switch portion is separated with load side terminal, and electric current only flows in over current trip, therefore, it is possible to implement by mistake
The common overload detection that current trip arrangement carries out.
Brief description of the drawings
Fig. 1 is the side view for the closed circuit state for representing the circuit-breaker involved by embodiments of the present invention 1.
Fig. 2 is the side view for the open-circuit condition for representing the circuit-breaker involved by embodiments of the present invention 1.
Fig. 3 is the tripgear and bypass resistance for representing the circuit-breaker involved by embodiments of the present invention 1
Partial side view.
Fig. 4 is the partial side view for the switch portion for representing the circuit-breaker involved by embodiments of the present invention 1.
Fig. 5 is the side view for the open-circuit condition for representing the circuit-breaker involved by embodiments of the present invention 2.
Fig. 6 is the tripgear and bypass resistance for representing the circuit-breaker involved by embodiments of the present invention 3
Partial side view.
Fig. 7 is the tripgear and bypass resistance for representing the circuit-breaker involved by embodiments of the present invention 3
Partial side view.
Fig. 8 is the oblique view for the tripgear for representing existing circuit-breaker.
Fig. 9 is the side view for the tripgear for representing existing circuit-breaker.
The explanation of label
1st, 1A, 1B circuit-breaker, 2,2A, 2B tripgear, 3 pedestals, 4 cover bodies, 5 power supply side terminals, 6 load side ends
Son, 6a contact sites, 7 fixed contact therefors, 8 movable contacts, 9 movable member framves, 10 mounting screws, 11 open-close mechanism sections, 11a trippings
Bar, 21 fixed iron cores, 21a carbine lacing films portion, 21b bridge parts, 21c side of sidewall portion, 21d magnetic poles, 21e retainers, 22 heaters,
22a heater portions, 23 bimetallic pieces, 24 flexible copper twisted wires, 25 adjusting screws, 26 retainer nuts, 27 movable cores, 27a quilts
Suction unit, 27b bearing portions, 27c operating sheets portion, 28 resetting springs, 29 the 2nd bimetallic pieces, 30 leaf springs, 31 yokes, 32 armature, 33
Resetting spring, 34 coils, 35 oil bumpers, 36 flexible connection lines, 37 the 3rd bimetallic pieces, 38 energization brackets, 38a axis holes, 39
2 movable cores, 40 resetting springs, 41 the 2nd fixed iron cores.
Embodiment
Reference example 1.
As the present invention reference example, shown in couple structure, that is, Fig. 8 and Fig. 9 identical with patent document 1 it is existing heat move-
The tripgear of the circuit-breaker of electromagnetic type illustrates.Fig. 8 and Fig. 9 is that the circuit for representing existing hot dynamic-electromagnetic type breaks
The oblique view and side view of the mian part of the tripgear of road device.
Fixed iron core 51 is formed as tabular by magnetic materials such as iron plates.Magnet support 52 passes through stainless-steel sheet etc. is non-
Magnetic material is bent into "U" shape and is formed, the opposite side obtained after "U" shape is bent into, has one in bottom
To retainer 52a, there is a pair of of carbine lacing film 52b in upper end, there is a pair of of U-shaped groove 52c in central portion.
Heater 53 is L-shaped, the internal thread part 53a with shunt terminal fastening is connected with its bottom, in upper end
It is connected with the connection conductor 54 being connected with load side terminal 6.Flat bimetallic piece 55 is between fixed iron core 51, clamping
Heater 53 and magnet support 52, are integratedly fixed using rivet 56.In the free end of bimetallic piece 55, stop is utilized
58 mounting and adjusting screw 57 of nut, is adjusted hot acting characteristic.
Movable core 59 is formed by the magnetic material buckles such as iron plate into "U" shape.Movable core 59 has：A pair can
Movable plate 59a, they are opposite with fixed iron core 51；Bearing portion 59b, it is arranged at an opposite side；Operating sheet 59c, its be arranged to
Top extension, be bent into "U" shape obtained from a side front end；And protrusion 59d, it is arranged at "U" shape
Bottom surface.Operating sheet 59c presses the trip(ping) bar of open-close mechanism section, and raised 59d is pushed to the retainer of magnet support 52
52a。
The resetting spring 60 of double torsion types is supported in the central portion of movable core 59 by 61 earth's axis free to rotate of axis, and double
The foot 60a turned round in shape is hooked on the carbine lacing film 52b of magnet support 52.Also, the axis 61 is inserted into magnet support
52 a pair of of U-shaped groove 52c.
In the tripgear formed in the above described manner, if electric current is in conductor 54 and the heater being connected with shunt terminal
Flow, then produced through fixed iron core 51 and the magnetic flux of movable core 59 in 53.When tripping as caused by electromagnetism, using by this
The attraction that magnetic flux produces, movable core 59 overcome the elastic force of resetting spring 60 and are attracted to fixed iron core 51, switching mechanism
The trip(ping) bar in portion rotates, and is disconnected automatically.In caused tripping dynamic by heat, the trip(ping) bar of open-close mechanism section passes through bimetallic
The flexure operation of part 55 and rotate, disconnected automatically.
In addition, in above-mentioned tripgear, the situation of the larger starting surge current when having flowed through motor starting
Under, also movable core 59 and the connection of circuit-breaker can sometimes simultaneously instantaneously acted, or the profit of bimetallic piece 55
Hastily heated with the persistently starting current of the motor in multiple cycles, before stabling current is reached, make breaker into
The unnecessary action of row.
In 1~embodiment of embodiments of the present invention 3 described below, to prevent as described above by starting wave
For the purpose of gushing unnecessary action caused by electric current and starting current, there is provided a kind of structure for being provided with bypass resistance, bypass electricity
Road has switch portion, which is connected in parallel with tripgear, is arranged to contact and separate with load side terminal.
Embodiment 1.
Hereinafter, the circuit-breaker involved by embodiments of the present invention 1 is illustrated based on attached drawing.Fig. 1 and Fig. 2 are
Represent the side view of the circuit-breaker involved by present embodiment 1, respectively Fig. 1 shows closed circuit state, Fig. 2 represents open circuit shape
State.In addition, Fig. 3 is the partial side of the tripgear and bypass resistance that represent the circuit-breaker involved by present embodiment 1
Figure.In addition, in the various figures, to identically or comparably part, mark identical label.
As shown in Figures 1 and 2, the circuit-breaker 1 involved by present embodiment 1 include over current trip 2 (with
Under, referred to as tripgear 2), power supply side terminal 5, load side terminal 6, fixed contact therefor 7, movable contact 8, switching mechanism
Portion 11 and the pedestal 3 being made of synthetic resin material and cover body 4 etc. and form.
Fixed contact therefor 7 is connected with power supply side terminal 5.Movable contact 8 is arranged as opposed to fixed contact therefor 7, is set
Cheng Keyu fixed contact therefors 7 are contacted and separated.Movable member frame 9 connects movable contact 8 and tripgear 2.
The tripgear 2 being configured between movable contact 8 and load side terminal 6, volume is based on flowing through to be greater than or equal to
Constant current and during the overcurrent of the setting that sets out, disconnected, connected by mounting screw 10 with movable member frame 9 automatically
Connect.Open-close mechanism section 11 has a trip(ping) bar 11a, and trip(ping) bar 11a and depressed, makes circuit by the action of tripgear 2
Breaker 1 trips.
The structure of the tripgear 2 of present embodiment 1 is illustrated using Fig. 1~Fig. 3.Tripgear 2, which has, to be fixed
Iron core 21, heater 22, bimetallic piece 23, flexible copper twisted wire 24, adjusting screw 25, retainer nut 26, movable core 27 with
And resetting spring 28.
Fixed iron core 21 is integrally formed with carbine lacing film portion 21a, bridge part 21b, a pair of sidewalls portion 21c and a pair
Magnetic pole 21d.Movable core 27 by a piece of magnetic material such as iron plate and be integrally formed be referred to as movable plate be attracted portion
27a, a pair of bearings portion 27b and operating sheet portion 27c.The magnetic pole for being attracted portion 27a and fixed iron core 21 of movable core 27
21d is opposite.
Movable core 27 in Fig. 1 with the bearing portion (illustration omitted) of pedestal 3 for pivot, from resetting spring 28 to
Counter clockwise direction pretension, the movement of the movable core 27 is prevented by the retainer (illustration omitted) of pedestal 3.
In addition, an end of heater 22 is connected with movable member frame 9, another end is consolidated with bimetallic piece 23
It is fixed.Bimetallic piece 23 is the metal joint plate for forming the different two panels metallic plate fitting of coefficient of thermal expansion, is the change with temperature
It is corresponding and carry out curved heat responsive element, configure between movable contact 8 and load side terminal 6, and be energized.
Bimetallic piece 23 and load side terminal 6 are connected via flexible copper twisted wire 24.In addition, the lower end of bimetallic piece 23
Portion is contacted with the heater portion 22a faces of heater 22.Thus, bimetallic piece 23 is electrically connected with movable member frame 9 and movable contact 8
Connect, and heated by heater portion 22a.
That is, both heating that bimetallic piece 23 is carried out using the spontaneous heating as caused by energization and as heater portion 22a and
Heating.Adjusting screw 25 is installed using retainer nut 26 in the free end of bimetallic piece 23.Utilize the adjusting screw 25, energy
Enough adjust the hot acting characteristic of bimetallic piece 23.
Circuit-breaker 1 involved by present embodiment 1 has bypass resistance, which has switch portion, this is opened
Pass portion is connected in parallel with the tripgear 2, is arranged to contact and separate with load side terminal 6.In present embodiment 1, make
There is the 2nd bimetallic piece 29 for switch portion, as shown in figure 3, an end of the 2nd bimetallic piece 29 is connected to bimetallic piece 23
The connecting portion being connected with heater 22.In addition, Fig. 3 is shown under the closed circuit state of circuit-breaker 1, the 2nd bimetallic piece 29
State after being separated with load side terminal 6.
The bypass resistance of present embodiment 1 includes load side terminal 6, the 2nd bimetallic piece 29, bimetallic piece 23, Yi Jijia
Hot device 22, but it's not limited to that, can also include other electroconductive components.However, in bypass resistance, the 2nd bimetallic piece
29 end is fixed in the electroconductive component being electrically connected with movable contact 8.
2nd bimetallic piece 29 proceeds as follows action, i.e. when circuit-breaker 1 is connected or as load
During the power on of motor, contacted with the contact site 6a of load side terminal 6, and electric current is flowed through in parallel with tripgear 2, such as
Fruit reaches set point of temperature, then is separated with load side terminal 6, electric current is only flowed in tripgear 2.
If overload electric current is from power supply side terminal 5 to determine contact 7, movable contact 8, movable member frame 9, heater
22nd, the path flowing of bimetallic piece 23, flexible copper twisted wire 24, load side terminal 6, then the bimetallic piece 23 of tripgear 2 is logical
Cross by the heater portion 22a heating carried out and spontaneous heating and heat up, bend.Using the bending, the tune of bimetallic piece 23 is installed on
Whole screw 25 presses trip(ping) bar 11a, and open-close mechanism section 11 acts and circuit-breaker 1 is tripped.
In addition, if the high current such as short circuit current flow flows in bimetallic piece 23, then fixed iron core 21 passes through by the big electricity
Big magnetic flux caused by stream and significantly magnetized, movable core 27 be attracted portion 27a be instantaneously subject to magnetic pole 21d attract.Profit
With the attraction, movable core 27 overcomes the elastic force of resetting spring 28 and rotates, and operating sheet portion 27c presses trip(ping) bar 11a and makes electricity
Circuit breaker 1 trips.
On the other hand, if relative to the temporary flow in motor starting starting surge current, starting current, carry out
It is above-mentioned to be disconnected automatically as caused by tripgear 2, then can not normal starting motor.Therefore, the electricity involved by present embodiment 1
Circuit breaker 1 has bypass resistance, and the bypass resistance is using the 2nd bimetallic piece 29 as switch portion, thus, in circuit-breaker 1
During connection or during the power on of motor, the electric current for making to flow in tripgear 2 is reduced, and is prevented by starting surge electricity
Unnecessary action caused by stream, starting current.
In addition, obtain the 2nd pair when electric current reaches the 80%~100% of rated current after the power on of motor
The temperature of metalwork 29, is set as, if reaching the temperature, the 2nd bimetallic piece 29 is separated with load side terminal 6.Therefore, exist
When can not possibly produce starting current, electric current only flows in tripgear 2, can carry out common overload detection.
But it is configured to, in the case of the larger short circuit accident electric current for starting surge current is had more than in flowing, even if
2nd bimetallic piece 29 is contacted with load side terminal 6, forms parallel circuit, the also snap action of tripgear 2, makes circuit-breaker 1
Tripping.
In addition, as shown in figure 4, the contact site 6a contacted with the 2nd bimetallic piece 29 by substituting load side terminal 6, and
Leaf spring 30 is arranged to the contact site contacted with the 2nd bimetallic piece 29 of load side terminal 6, so that the flexure using leaf spring 30
Amount, can be adjusted the separating distance of the 2nd bimetallic piece 29 with the precision of higher.Thus, such as can also be set as,
In the range of reach rated current 95%~100%, the 2nd bimetallic piece 29 is separated with load side terminal 6.
In addition, microswitch can also be set on the contact site 6a contacted with the 2nd bimetallic piece 29 of load side terminal 6
(illustration omitted).Microswitch has actuator in outside, has contact portion and snap action structure in the housing of insulating properties
Portion.
By making the 2nd bimetallic piece 29 be contacted with the actuator portion of microswitch, so as to make in 6 He of load side terminal
Caused electric arc produces in the housing of microswitch when 2nd bimetallic piece 29 is contacted, separated.Thereby, it is possible to ensure to load
The contact reliability of 6 and the 2nd bimetallic piece 29 of side terminal, can realize the long lifetime of contact site.
As described above, the circuit-breaker 1 involved by 1 according to the present embodiment, due to being formed as, has bypass resistance,
The bypass resistance has the 2nd bimetallic piece 29, and the 2nd bimetallic piece 29 is arranged to contact and separate with load side terminal 6,
When circuit-breaker 1 is connected or during the power on of motor, the contact site 6a of the 2nd bimetallic piece 29 and load side terminal 6
Contact, and electric current is flowed through in parallel with tripgear 2, can therefore, it is possible to reduce the electric current flowed in tripgear 2
Prevent the unnecessary action as caused by starting surge current, starting current.
In addition, being formed as, if reaching set point of temperature, the 2nd bimetallic piece 29 is separated with load side terminal 6, and electric current is only
Flowed in tripgear 2, therefore common overload detection can be carried out, can normally carried out the starting of motor and stop
Only.
Embodiment 2.
Fig. 5 is the side view for the open-circuit condition for representing the circuit-breaker involved by embodiments of the present invention 2.In this reality
Apply in mode 2, in the circuit-breaker 1A of the tripgear 2A different from the above embodiment 1 with structure, have and jump
The bypass resistance that brake gear 2A is connected in parallel, the 3rd bimetallic piece 37 is used as the switch portion.In addition, in Fig. 5 with figure
1 part identically or comparably, marks identical label, and omits the description.
The tripgear 2A of circuit-breaker 1A is illustrated.In the fixed part of the yoke 31 of L-shaped, movably support
There is armature 32.The armature 32 is maintained at assigned position by resetting spring 33.One end of coil 34 is via flexible connection line
36 and be connected with movable contact 8, another end is connected with load side terminal 6.The insertion oil bumper 35 in the coil 34,
35 1 ends of oil bumper are oppositely disposed with armature 32.
In addition, circuit-breaker 1A has a bypass resistance, which has a switch portion, which is arranged to can be with
Load side terminal 6 is contacted and separated.In present embodiment 2, the 3rd bimetallic piece 37 is used as switch portion, is formed and jumped
The bypass resistance of brake gear 2A parallel connections.One end of the 3rd bimetallic piece 37 and the end of 8 side of movable contact of coil 34 connect
Connect.That is, bypass resistance includes one end of coil 34,6 and the 3rd bimetallic piece 37 of load side terminal, but it's not limited to that,
Other electroconductive components can be included.
3rd bimetallic piece 37 proceeds as follows action, i.e. when circuit-breaker 1A is connected or motor electricity
When source is connected, contacted with load side terminal 6, flow through electric current in parallel with tripgear 2A, if reaching set point of temperature, with bearing
Carry side terminal 6 to separate, electric current is only flowed in tripgear 2A.
If overload electric current is from power supply side terminal 5 with fixed contact therefor 7, movable contact 8, flexible connection line 36, line
The path flowing of circle 34, load side terminal 6, then the iron core in oil bumper 35 is movable, and thus, magnetic flux density becomes larger, armature 32
It is attracted to oil bumper 35.By the action, armature 32 presses trip(ping) bar 11a, and open-close mechanism section 11 is acted, and makes circuit
Breaker 1A trips.
In addition, if the high current such as short circuit current flow in coil 34, then since leakage magnetic flux, armature 32 are instantaneously inhaled
Lead to oil bumper 35.By the action, armature 32 presses trip(ping) bar 11a, circuit-breaker 1A is tripped.
On the other hand, if relative to the temporary flow in motor starting starting surge current, starting current, carry out
It is above-mentioned to be disconnected automatically as caused by tripgear 2A, then can not normal starting motor.Therefore, involved by present embodiment 2
Circuit-breaker 1A has the bypass resistance using the 3rd bimetallic piece 37 as switch portion, so as to make in circuit-breaker 1A
During connection or during the power on of motor, the electric current flowed in tripgear 2A is reduced, and can be prevented by starting surge
Unnecessary action caused by electric current, starting current.
In addition, obtain the 3rd pair when electric current reaches the 80%~100% of rated current after the power on of motor
The temperature of metalwork 37, is set as, if reaching the temperature, the 3rd bimetallic piece 37 is separated with load side terminal 6.Therefore, exist
When can not possibly produce starting current, electric current only flows in tripgear 2A, can carry out common overload detection.
But it is configured to, in the case of the larger short circuit accident electric current for starting surge current is had more than in flowing, even if
3rd bimetallic piece 37 is contacted with load side terminal 6, forms parallel circuit, tripgear 2A also snap actions, make circuit-breaker
1A trips.
In present embodiment 2, leaf spring 30 is disposed in contact with portion with substituting contact site 6a in the above embodiment 1
In the same manner, leaf spring can also be set in the contact site contacted with the 3rd bimetallic piece 37 of load side terminal 6.Thus, such as can be with
It is set as, in the range of reaching the 95%~100% of rated current, the 3rd bimetallic piece 37 is separated with load side terminal 6.
And then can also be with the above embodiment 1, being connect in load side terminal 6 with what the 2nd bimetallic piece 29 contacted
Contact portion 6a is provided with microswitch in the same manner, is set in the contact site contacted with the 3rd bimetallic piece 37 of load side terminal 6 miniature
Switch (illustration omitted).Thereby, it is possible to ensure the contact reliability of 6 and the 3rd bimetallic piece 37 of load side terminal, it can realize and connect
The long lifetime of contact portion.
It is identical with the above embodiment 1 in the circuit-breaker 1A involved by present embodiment 2, can also prevent by
Unnecessary action caused by starting surge current, starting current, can normally carry out the starting and stopping of motor.
Embodiment 3.
Fig. 6 is the partial side view for the tripgear for representing the circuit-breaker involved by present embodiment 3, and Fig. 7 is table
Show in the circuit-breaker involved by present embodiment 3, the part of the state of tripgear when starting surge current is powered
Side view.In addition, the overall structure of the circuit-breaker 1B involved by present embodiment 3 is due to identical with the above embodiment 1,
Therefore continue to use Fig. 1 and illustrate.
The structure of the tripgear 2B of circuit-breaker 1B, in addition to energization bracket 38, with the above embodiment 1
It is identical, wherein, which is electrically coupled with heater 22 and bimetallic piece 23.In addition, when flowing has overload electric current
The tripping action as caused by tripgear 2B, omitted the description due to identical with the above embodiment 1.
Switch portion in circuit-breaker 1B as bypass resistance, has：2nd fixed iron core 41, it is arranged at load-side
Terminal 6；And the 2nd movable core 39, it is arranged as opposed to the 2nd fixed iron core 41.One end of the 2nd movable core 39 can
Energization bracket 38 is rotatably mounted to, which is the electroconductive component being electrically connected with movable contact 8.
In figure 6, the 2nd movable core 39 is using the axis hole 38a of energization bracket 38 as pivot, from resetting spring 40 to
Clockwise direction pretension, one end thereof are prevented and can not be moved by the retainer 21e of fixed iron core 21.That is, present embodiment 3
Bypass resistance include load side terminal 6, the 2nd fixed iron core 41, the 2nd movable core 39 and energization bracket 38, it is but and unlimited
Due to this.
In the circuit-breaker 1B being constructed as described above, if flowed through in load side terminal 6 start surge current,
Starting current, then the 2nd fixed iron core 41 be magnetized, as shown in fig. 7, the 2nd movable core 39 attracted and with the 2nd fixed iron core
41 contacts, form the bypass resistance in parallel with tripgear 2B.Movable core 27 of the bypass resistance in tripgear 2B is inhaled
Formed before leading to the action of fixed iron core 21.The electric current reduction that thereby, it is possible to make to flow in tripgear 2B, can prevent
The unnecessary action of the circuit-breaker 1B as caused by starting surge current, starting current.
But it is configured to, in the case of the larger short circuit accident electric current for starting surge current is had more than in flowing, even if
2nd movable core 39 is contacted with the 2nd fixed iron core 41, forms parallel circuit, and tripgear 2B is also instantaneously acted, and circuit is broken
Road device 1B trips.
In addition, present embodiment 3 include energization bracket 38, the 2nd movable core 39 and the 2nd fixed iron core 41 including
The structure of bypass resistance, due to not heated influence, even in being heated to a degree of shape from circuit-breaker 1B
When (hot exposure) motor is started under state, the unnecessary action as caused by starting surge current, starting current can be also prevented.
In addition, in present embodiment 3, it is identical with the above embodiment 1, load side terminal 6 can also be arranged at
Microswitch (illustration omitted) is set at the 2nd fixed iron core 41.Thereby, it is possible to ensure the 2nd fixed iron core 41 and the 2nd movable core
39 contact reliability, can realize the long lifetime of contact site.
In the circuit-breaker 1B involved by present embodiment 3, the effect identical with the above embodiment 1 can be also obtained
Fruit, further, it is possible to unnecessary action caused by starting surge current, starting current when preventing the hot exposure as motor.This
Outside, the present invention within the scope of the invention, can be freely combined each embodiment, or each embodiment is fitted
When deformation, omit.
Industrial applicibility
The present invention can move as the heat being installed in Inturruptor for sub-line etc.-electricity of electromagnetic type or complete electromagnetic type
Circuit breaker and utilized.
Claims (11)
1. a kind of circuit-breaker, it has：Fixed contact therefor (7), it is connected with power supply side terminal (5)；Movable contact
(8), it is arranged to contact and separate with the fixed contact therefor (7)；Over current trip (2,2A, 2B), it, which is configured, exists
Between the movable contact (8) and load side terminal (6), it is greater than or equal to what is set out based on rated current if flowed through
The overcurrent of setting, then disconnected automatically；And bypass resistance, its with switch portion, the switch portion with it is described excessively electric
Stream tripgear (2,2A, 2B) is connected in parallel, and is arranged to contact and separate with the load side terminal (6),
The circuit-breaker is characterized in that,
The switch portion of the bypass resistance proceeds as follows action, i.e. in the power on of load, is born with described
Carry side terminal (6) contact and flow through electric current in parallel with the over current trip (2,2A, 2B), if electric current reaches specified
Within the prescribed limit of electric current, then separated with the load side terminal (6), make electric current only the over current trip (2,
2A, 2B) in flowing.
2. circuit-breaker according to claim 1, it is characterised in that
The over current trip (2,2B) has：Fixed iron core (21)；Movable core (27), itself and the fixed iron core (21)
Magnetic pole (21d) it is opposite；And bimetallic piece (23), it is configured at the movable contact (8) and the load side terminal (6)
Between, and it is energized, the over current trip (2,2B) is attracted to the fixed iron by the movable core (27)
The action of the heart (21) or the flexure operation of the bimetallic piece (23), and disconnected automatically.
3. circuit-breaker according to claim 2, it is characterised in that
The bypass resistance has the 2nd bimetallic piece (29) as the switch portion, one of the 2nd bimetallic piece (29)
End is fixed in the electroconductive component being electrically connected with the movable contact (8).
4. circuit-breaker according to claim 3, it is characterised in that
After the power on of the load, the 2nd bimetallic piece (29) is if reach set point of temperature, with the load
Side terminal (6) separates.
5. circuit-breaker according to claim 2, it is characterised in that
The bypass resistance has as the 2nd fixed iron core (41) of the switch portion and the 2nd movable core (39), wherein,
2nd fixed iron core (41) is arranged at the load side terminal (6), the 2nd movable core (39) and the 2nd fixed iron core
(41) it is arranged as opposed to, an end of the 2nd movable core (39) is rotatably installed on and the movable contact (8)
The electroconductive component (38) of electrical connection.
6. circuit-breaker according to claim 1, it is characterised in that
The over current trip (2A) has：The yoke (31) of L-shaped, it is with fixed part；Armature (32), it is movably
It is supported on the fixed part of the yoke (31)；Resetting spring (33), the armature (32) is held at assigned position by it；
Coil (34), one end thereof are connected with the movable contact (8), another end is connected with the load side terminal (6)；
And oil bumper (35), it is inserted into the coil (34), and an end is oppositely disposed with the armature (32), institute
The action that over current trip (2A) is attracted to the oil bumper (35) by the armature (32) is stated, and is carried out automatic
Disconnect.
7. circuit-breaker according to claim 6, it is characterised in that
The bypass resistance has the 3rd bimetallic piece (37) as the switch portion, one of the 3rd bimetallic piece (37)
End is connected with the end of the movable contact (8) side of the coil (34).
8. circuit-breaker according to claim 7, it is characterised in that
After the power on of the load, the 3rd bimetallic piece (37) is if reach set point of temperature, with the load
Side terminal (6) separates.
9. the circuit-breaker according to claim 3 or 7, it is characterised in that
The load side terminal (6) is provided with leaf spring (30) in the contact site contacted with the switch portion.
10. circuit-breaker according to claim 1, it is characterised in that
The load side terminal (6) is provided with microswitch in the contact site contacted with the switch portion.
11. circuit-breaker according to claim 1, it is characterised in that
The bypass resistance is configured to, after the power on of the load, if 80%~100% as rated current
Electric current, then the switch portion separated with the load side terminal (6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-110891 | 2014-05-29 | ||
| JP2014110891A JP6218675B2 (en) | 2014-05-29 | 2014-05-29 | Circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105280450A CN105280450A (en) | 2016-01-27 |
| CN105280450B true CN105280450B (en) | 2018-04-17 |
Family
ID=54842399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410659078.4A Active CN105280450B (en) | 2014-05-29 | 2014-11-18 | Circuit-breaker |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6218675B2 (en) |
| KR (1) | KR101608592B1 (en) |
| CN (1) | CN105280450B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017214255A1 (en) * | 2016-06-07 | 2017-12-14 | Gentex Corporation | Vehicle trainable transceiver for allowing cloud-based transfer of data between vehicles |
| WO2020026357A1 (en) * | 2018-07-31 | 2020-02-06 | 三菱電機株式会社 | Breaker |
| JP7331796B2 (en) * | 2020-07-08 | 2023-08-23 | 三菱電機株式会社 | circuit breaker |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60136457U (en) * | 1984-02-23 | 1985-09-10 | 三菱電機株式会社 | circuit break |
| JPS60174163U (en) * | 1984-04-26 | 1985-11-18 | 三菱電機株式会社 | circuit break |
| JPH0896689A (en) * | 1994-09-28 | 1996-04-12 | Mitsubishi Electric Corp | Trip device of circuit breaker |
| JP2001135204A (en) * | 1999-11-10 | 2001-05-18 | Hitachi Ltd | Transient current preventing unit in incoming substation facility |
| CN1304154A (en) * | 2000-01-12 | 2001-07-18 | 河村电器产业株式会社 | Electromagnetic apparatus of circuit breaker |
| WO2002017458A1 (en) * | 2000-08-22 | 2002-02-28 | Mitsubishi Denki Kabushiki Kaisha | Ground fault interrupter |
| CN202423173U (en) * | 2011-11-15 | 2012-09-05 | 施耐德电器工业公司 | Tripping mechanism of surge protector and surge protector |
| CN203103945U (en) * | 2013-02-21 | 2013-07-31 | 乐清市稳宝电子电气有限公司 | Surge protector |
-
2014
- 2014-05-29 JP JP2014110891A patent/JP6218675B2/en active Active
- 2014-08-27 KR KR1020140112256A patent/KR101608592B1/en active IP Right Grant
- 2014-11-18 CN CN201410659078.4A patent/CN105280450B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR20150137941A (en) | 2015-12-09 |
| KR101608592B1 (en) | 2016-04-01 |
| JP2015225796A (en) | 2015-12-14 |
| JP6218675B2 (en) | 2017-10-25 |
| CN105280450A (en) | 2016-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1782447B1 (en) | Systems, methods, and device for actuating a circuit breaker | |
| US9601296B2 (en) | Low tripping level circuit breakers, tripping units, and methods | |
| CN101976640B (en) | Low-voltage breaker tripper | |
| CN105280450B (en) | Circuit-breaker | |
| US10056214B2 (en) | Heater apparatus, circuit interrupter, and related method | |
| US4090156A (en) | Circuit breaker having solid state and thermal-magnetic trip means | |
| KR101647915B1 (en) | Circuit breaker | |
| EP2966667B1 (en) | Low instantaneous level circuit breakers, circuit breaker tripping mechanisms, and tripping methods | |
| US9406474B2 (en) | Circuit breaker heaters and translational magnetic systems | |
| JP4905112B2 (en) | Circuit breaker overcurrent trip device | |
| KR20150029165A (en) | Circuit breaker | |
| CN204011322U (en) | Release for circuit breaker | |
| EP3016126B1 (en) | Magnetically driven trip mechanism for an overload relay | |
| CN105448613B (en) | Buckle releaser for breaker | |
| CN109950104B (en) | Thermomagnetic trip assembly and electrical switch unit | |
| KR200333228Y1 (en) | Trip Device of Circuit Breaker | |
| JPS6245658B2 (en) | ||
| RU113866U1 (en) | HEAT CURRENT DISCONNECTOR | |
| WO2016035116A1 (en) | Circuit breaker | |
| RU2457569C2 (en) | Automatic circuit breaker | |
| JP2012142096A (en) | Circuit breaker | |
| WO2002035571A1 (en) | Auxiliary contact molded case circuit breaker | |
| JP2013246946A (en) | Circuit breaker | |
| JP2009087691A (en) | Electromagnetic device of circuit breaker | |
| CN104517787A (en) | Breaker with magnet fixing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |