CN110120327A - The detection of electrical leakage tripping attachment and leakage circuit breakers of preposition zero sequence current mutual inductor - Google Patents
The detection of electrical leakage tripping attachment and leakage circuit breakers of preposition zero sequence current mutual inductor Download PDFInfo
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- CN110120327A CN110120327A CN201910432827.2A CN201910432827A CN110120327A CN 110120327 A CN110120327 A CN 110120327A CN 201910432827 A CN201910432827 A CN 201910432827A CN 110120327 A CN110120327 A CN 110120327A
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- 229910052742 iron Inorganic materials 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 4
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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
- H01H71/08—Terminals; Connections
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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
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
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- 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
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
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Abstract
The present invention discloses a kind of detection of electrical leakage tripping attachment of preposition zero sequence current mutual inductor, it is related to breaker technical field, including zero sequence current mutual inductor and disengaging deivce of earth leakage, zero sequence current mutual inductor is connect with disengaging deivce of earth leakage, cooperation breaker unit using when zero sequence current mutual inductor be placed in breaker unit one end, external cable is electrically connected after passing through zero sequence current mutual inductor with breaker unit, zero sequence current mutual inductor is for detecting whether the electric current passed through leaks electricity, when electric leakage occurs, disengaging deivce of earth leakage executes trip action.The detection of electrical leakage tripping accessory configuration of preposition zero sequence current mutual inductor provided in this embodiment is in the terminals side of breaker unit, it is usually placed in the output end side of breaker unit, the leakage circuit breakers of this combination does not need cable and passes through zero sequence current mutual inductor from inside, after product installation, when accessing external cable use, every pole external cable sequentially passes through zero sequence current mutual inductor, can reach the purpose of detection leakage current.
Description
Technical field
The present invention relates to breaker technical fields, de- more particularly to a kind of detection of electrical leakage of preposition zero sequence current mutual inductor
Detain attachment and leakage circuit breakers.
Background technique
Fig. 1 is the existing 4P leakage circuit breakers using round mutual inductor, including 4P breaker and the tripping of 4P detection of electrical leakage
Attachment, round zero sequence current mutual inductor 3 (referred to as round mutual inductor) are built in detection of electrical leakage tripping attachment 2, breaker 1 and leakage
Electro-detection tripping attachment 2 passes through hard copper enameled wire 7 and connects.Low pressure residual current circuit breaker (also referred to as leakage, breakings all at present
Device) detection leaked electricity using round zero sequence current mutual inductor 3, especially for miniature circuit breaker, due to by geometry sky
Between limitation and wiring for external cable, can only be designed to form as shown in Figure 1, that is, thread off in detection of electrical leakage attached
It is further added by one group of output end on part 2, installs and justifies between original breaker output end 5 and detection of electrical leakage tripping attachment output end 6
Shape zero sequence current mutual inductor 3, then with one group as required molding hard copper enameled wire group 4 pass through round zero sequence current mutual inductor 3 with
Breaker output end 5 and detection of electrical leakage tripping attachment output end 6 are connected, not only occupies very large space, but also increase many materials
Expect cost, and its assembly technology is many and diverse.
It is had the disadvantages that using the leakage circuit breakers of round mutual inductor
1. the leakage circuit breakers of existing scheme is the additional detection of electrical leakage tripping attachment of one group of universal breaker, uses
The inside of detection of electrical leakage tripping attachment can only be built in due to the limitation of geometric space in the round mutual inductor of detection electric leakage；
This just needs in addition to make one group of hard copper enameled wire group (for the insulation that conducting wire is mutual) and increases by one group of output end；Hard copper paint
One end of envelope curve group is connect with each output end of breaker respectively, the other end concentrate after round mutual inductor with detection of electrical leakage
Each output end connection of tripping attachment；In order to keep the electric insulation between cable, the hard copper paint that cable selects sub-thread preforming
Envelope curve causes assembly technology extremely complex；
2. the end that existing scheme passes through the hard copper enameled wire group of round mutual inductor is connected on matched breaker, another
End is connected to the output connection frame of detection of electrical leakage tripping attachment, and wiring frame portion is set on the shell.The wire frame of every cable occupies
Space is 1 pole modulus 18mm, therefore increases the installation space of breaker；
3. the preforming hard copper enameled wire of the sub-thread for passing through round mutual inductor, the internal resistance of itself and connect with breaker
Contact resistance is easy to cause the temperature rise of leakage circuit breakers to increase；
4. existing scheme uses the hard copper enameled wire preforming across the sub-thread of round mutual inductor, and is arranged through round mutual
The preforming hard copper enamel-cover wire bonding lug plate of all sub-threads of sensor, assembles wire frame in plastics back box, to consume a large amount of
Copper material and plastic material；
5. overall cost is high: the preforming hard copper enameled wire of sub-thread threads complex technical process, and time-consuming for manufacture；Sub-thread is pre-
The assemble welding difficulty of molding hard copper enameled wire and wire frame is big；It is processed using a large amount of prefabricated sub-thread hard copper enameled wires
Journey is long, while expending a large amount of copper material；It places round mutual inductor and arranges the wiring of the preforming hard copper enameled wire of all sub-threads
Frame needs to make plastics back box, expends a large amount of plastic materials；The integral material and assembly cost of leakage circuit breakers are high.
Summary of the invention
It is existing to solve the purpose of the present invention is to provide a kind of detection of electrical leakage of preposition zero sequence current mutual inductor tripping attachment
There is leakage circuit breakers to need to manufacture across round mutual inductor to connect breaker output end and detection of electrical leakage tripping attachment output end
Hard copper enameled wire, occupied space is big, increases many materials cost and problem that assembly technology is many and diverse.
To achieve the above object, the invention adopts the following technical scheme:
A kind of detection of electrical leakage tripping attachment of preposition zero sequence current mutual inductor, including zero sequence current mutual inductor and electric leakage tripping
Device, zero sequence current mutual inductor are connect with disengaging deivce of earth leakage, cooperation breaker unit using when zero sequence current mutual inductor be placed in
Breaker unit one end, external cable are electrically connected after passing through zero sequence current mutual inductor with breaker unit, zero sequence current mutual inductor
For detecting whether the electric current passed through leaks electricity, when electric leakage occurs, disengaging deivce of earth leakage executes trip action.
Further, zero sequence current mutual inductor is set to outside disengaging deivce of earth leakage, and cooperation breaker unit is in use, electric leakage
Trip gear is set to breaker unit side and mechanically links with breaker unit.
Further, the zero sequence current mutual inductor includes iron core, and it is transversely arranged to be equipped with two or more in iron core inner hole
And the threading hole of mutual insulating, mutual inductor coil is wound on iron core, and the both ends of the mutual inductor coil are respectively connected with mutual inductor
Coil outer lead, the mutual inductor coil are electrically connected by mutual inductor coil outer lead and the electronic circuit board in disengaging deivce of earth leakage
It connects, when electric leakage occurs, electronic circuit board, which issues signal, makes disengaging deivce of earth leakage execute trip action.
Further, test loop coil is wound on the iron core, the both ends of the test loop coil are respectively connected with
Test loop coil outer lead, the test loop coil outer lead are electrically connected the electronic circuit board.
Further, the zero sequence current mutual inductor further includes protecting box, the shape of the protecting box and the iron core
Shape is adapted, and the iron core is placed in the protecting box, and the mutual inductor coil and the test loop coil are wrapped in guarantor
It protects and forms iron core winding on box.
Further, the zero sequence current mutual inductor further includes shell, and the iron core winding is placed in the shell, described
Shell is equipped with the threading column that two or more has the inner hole of both ends perforation, and the threading column is placed through the iron core winding
Inner hole.
Further, encapsulating has epoxide-resin glue in the housing interior volume, and epoxide-resin glue is for fixing and sealing
It is placed in the element and electric connecting joint of interior of shell.
Further, the iron core is in flat track type.
Further, the threading hole is configured with taking electric piece, described to take electric piece to be connected with to take electrical lead, described to take electrical lead
It is electrically connected electronic circuit board.
As a preferred embodiment, there is the disengaging deivce of earth leakage zero curve to switch fracture, the zero sequence current mutual inductor
On one of threading hole and the zero curve switch wire frame of fracture it is corresponding, remaining described threading hole is configured with and takes electric piece, described to take
Electric piece, which is connected with, takes electrical lead, described that electrical lead is taken to be electrically connected electronic circuit board.
Compared with prior art, detection of electrical leakage tripping attachment provided by the invention has the advantage that
1, zero sequence current mutual inductor is placed on outside disengaging deivce of earth leakage, in use, zero sequence current mutual inductor is configured at open circuit
The input terminal of device unit or the threading direction front end of output end, all external cables are parallel across zero sequence current mutual inductor inside
It can directly be connect with the wire frame of breaker unit, not need prefabricated hard copper enameled wire, simplify production technology.It is all conductive main
For the beam conduction connector in circuit parallel across zero sequence current mutual inductor, conductive cable does not need shaping again, simple side
Just.Since zero sequence current mutual inductor is arranged outside disengaging deivce of earth leakage, the width for making it possible to disengaging deivce of earth leakage is limited in one
Modulus, by the breaker unit of the detection of electrical leakage tripping attachment matching different number of this preposition zero sequence current mutual inductor in use,
It combines the leakage circuit breakers formed and only increases a modulus 18mm than the overall width of each breaker unit, overall cost is low, structure
Succinctly, assembly technology is simple, saves material.
2, different from existing traditional round mutual inductor punching line mode, detection of electrical leakage tripping attachment provided by the invention
Zero sequence current mutual inductor has mutual insulating and transversely arranged several threading holes, according to the breaker unit of different numbers of poles, zero
Sequence current transformer designs corresponding hole size, and entirety is in flat track type, by flat track type zero sequence current mutual inductance
Device is external in the output end of breaker unit or the threading direction front end of input terminal, big using flat track type iron core lateral dimension
Advantage, dexterously by the external cable of breaker unit directly through zero sequence current mutual inductor with to breaker unit realization connect
Line, to collect and detect leakage current.
3, the detection of electrical leakage tripping attachment of preposition zero sequence current mutual inductor provided by the invention is divided into two kinds, and one kind is without zero
Line (N line) switchs fracture, and such detection of electrical leakage tripping attachment does not need the wire frame that cable is arranged on the shell；Another band
Zero curve switchs fracture, zero curve wire frame is arranged on detection of electrical leakage tripping attachment, leakage circuit breakers is de- using such detection of electrical leakage
Button attachment can save 1 pole breaker unit.
The object of the invention is also to provide a kind of leakage circuit breakers, are taken off by the detection of electrical leakage of preposition zero sequence current mutual inductor
Button attachment and at least one breaker unit assembling combination form, and wherein zero sequence current mutual inductor is configured at the defeated of breaker unit
Enter the threading direction front end of end or output end, when leakage circuit breakers accesses external cable, all external cables pass through zero-sequence current
Directly reach the purpose of detection leakage current with the wire frame wiring of breaker unit after mutual inductor.
Compared with prior art, leakage circuit breakers provided by the invention has the advantage that
1, (hereinafter referred to as detection of electrical leakage is de- for the detection of electrical leakage tripping attachment of preposition zero sequence current mutual inductor provided by the invention
Button attachment) in use, detection of electrical leakage is threaded off, attachment is detachably connected cooperation breaker unit with breaker unit, and is leaked electricity
The zero sequence current mutual inductor of detection tripping attachment is preposition in the input terminal of breaker unit or the wiring direction front end of output end, leakage
Electric trip gear is mounted on breaker unit side.The leakage circuit breakers of this combination does not need cable and passes through mutual inductor from inside,
After product installation, access external cable in use, the external cable of all poles of breaker unit has passed through zero sequence current mutual inductor,
It can reach the purpose of detection leakage current.The conductive cable of all major loops is conductive parallel across zero sequence current mutual inductor
Cable does not need shaping again, simple and convenient.
2, since zero sequence current mutual inductor is arranged outside disengaging deivce of earth leakage, the width of disengaging deivce of earth leakage is limited
In a modulus, by the breaker unit of the detection of electrical leakage tripping attachment matching different number of this preposition zero sequence current mutual inductor
In use, the leakage circuit breakers that combination is formed only increases a modulus 18mm, overall cost than the overall width of each breaker unit
Low, simple for structure, assembly technology is simple, saves material.
3, hole number is corresponding with the number of poles of breaker unit in zero sequence current mutual inductor provided by the invention, guarantees open circuit
Every pole external cable of device unit sequentially passes through the threading hole of zero sequence current mutual inductor.External cable mutual not shadow in each threading hole
It rings, insulation effect is good, and leakage circuit breakers is not easy to heat up.
Detailed description of the invention
Fig. 1 is the partial sectional view of the existing 4P leakage circuit breakers using round mutual inductor；
Fig. 2 is that the detection of electrical leakage of the preposition zero sequence current mutual inductor without zero curve switch fracture of the embodiment of the present invention 1 is de-
Detain the stereoscopic schematic diagram of the zero sequence current mutual inductor of attachment；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is the exploded view of Fig. 2；
Fig. 5 is that the detection of electrical leakage of the preposition zero sequence current mutual inductor without zero curve switch fracture of the embodiment of the present invention 1 is de-
Detain the stereoscopic schematic diagram of attachment；
Fig. 6 is the detection of electrical leakage tripping of the preposition zero sequence current mutual inductor with zero curve switch fracture of the embodiment of the present invention 1
The stereoscopic schematic diagram of the zero sequence current mutual inductor of attachment；
Fig. 7 is the top view of Fig. 6；
Fig. 8 is the exploded view of Fig. 6；
Fig. 9 is the detection of electrical leakage tripping of the preposition zero sequence current mutual inductor with zero curve switch fracture of the embodiment of the present invention 1
The stereoscopic schematic diagram of attachment；
Figure 10 is the main view of the leakage circuit breakers of embodiment 2, specially the main view of 3P+N type leakage circuit breakers；
Figure 11 is the main view of existing 3P+N type leakage circuit breakers；
Figure 12 is the main view of the leakage circuit breakers of embodiment 2, specially the main view of 3P type leakage circuit breakers；
Figure 13 is the main view of existing 3P type leakage circuit breakers；
Figure 14 is that the detection of electrical leakage tripping attachment for the preposition zero sequence current mutual inductor that the present embodiment 1 provides has with existing
The indices contrast table of the detection of electrical leakage tripping attachment of round zero sequence current mutual inductor；
Figure 15 is the internal structure part schematic diagram of disengaging deivce of earth leakage；
Figure 16 is the left view of Figure 15.
Specific embodiment
Now in conjunction with the drawings and specific embodiments, the invention will be further described.
Embodiment 1: detection of electrical leakage tripping attachment in the prior art, need to be by the external electricity of sub-thread using round zero sequence transformer
Cable is special at sub-thread hard copper enameled wire, and each sub-thread hard copper enameled wire concentration is fabricated to one group of hard copper enameled wire, then by whole group
Hard copper enameled wire passes through the centre bore of round zero sequence transformer.
Fig. 2 is please referred to Fig. 9, Figure 15 and Figure 16, the present embodiment provides a kind of electric leakage of preposition zero sequence current mutual inductor inspections
Survey tripping attachment, including zero sequence current mutual inductor 10 and disengaging deivce of earth leakage 20, zero-sequence current when cooperation breaker unit uses
Mutual inductor 10 is placed in breaker unit one end, and external cable is electrically connected after passing through zero sequence current mutual inductor 10 with breaker unit,
Zero sequence current mutual inductor 10 is for detecting whether the electric current passed through leaks electricity, and when electric leakage occurs, disengaging deivce of earth leakage 20 executes tripping
Movement.
(hereinafter referred to as detection of electrical leakage is de- for the detection of electrical leakage tripping attachment of preposition zero sequence current mutual inductor provided in this embodiment
Button attachment) leakage circuit breakers is formed when match use with breaker unit 30, detection of electrical leakage tripping attachment and breaker unit 30
It is detachably connected, zero sequence current mutual inductor 10 is placed on outside disengaging deivce of earth leakage, and specifically, zero sequence current mutual inductor 10 is configured at
The input terminal of breaker unit 30 or the threading direction front end of output end.With the center of traditional round zero sequence current mutual inductor 40
Hole threads mode difference, the detection of electrical leakage tripping attachment of preposition zero sequence current mutual inductor provided in this embodiment, all external electricity
Cable is parallel across 10 inner hole of zero sequence current mutual inductor.
Figure 10 and Figure 12 are please referred to, zero sequence current mutual inductor is set to outside disengaging deivce of earth leakage, and cooperation breaker unit makes
Used time, disengaging deivce of earth leakage are set to breaker unit side and mechanically link with breaker unit.Such as Fig. 5 and Fig. 9 institute
Show, zero sequence current mutual inductor is substantially l-shaped with disengaging deivce of earth leakage.The width of disengaging deivce of earth leakage described in the present embodiment can be set
It is set to the width of a breaker unit, compared to traditional detection of electrical leakage tripping attachment, greatly reduces overall volume.
Please see Fig. 2 to Fig. 4, Fig. 6 to Fig. 8, zero sequence current mutual inductor 10 include 101 (not shown) of iron core, iron core 101
Inner hole in be equipped with that two or more is transversely arranged and the threading hole 102 of mutual insulating, be wound with mutual inductor coil on iron core 101
104, the both ends of mutual inductor coil 104 are respectively connected with mutual inductor coil outer lead, and mutual inductor coil 104 passes through outside mutual inductor coil
Lead is electrically connected with the electronic circuit board in disengaging deivce of earth leakage, and when electric leakage occurs, electronic circuit board, which issues signal, to be made to leak electricity
Trip gear executes trip action.
In the present embodiment, test loop coil 105 is wound on iron core 101, the both ends of test loop coil 105 connect
It is connected to test loop coil outer lead, test loop coil outer lead connects electronic circuit board.
Scheme as a further improvement, zero sequence current mutual inductor 10 further include protecting box 106, the shape of protecting box 106
It is adapted with the shape of iron core 101, iron core 101 is placed in protecting box 106, and mutual inductor coil 104 and test loop coil 105 twine
It is wound on formation iron core winding in protecting box 106.
Zero sequence current mutual inductor 10 provided in this embodiment has threading corresponding with the wire frame of breaker unit 30
Hole 102, zero sequence current mutual inductor 10 are set to the input terminal of breaker unit 30 or the threading direction front end of output end, outside sub-thread
Connecing cable can successively connect directly through corresponding threading hole 102 with breaker unit 30, be not required to manufacture hard copper enameled wire and
Hard copper enameled wire group, greatly simplifies production technology.The external cable of all major loops is parallel across zero sequence current mutual inductor
10 inner holes, conductive cable does not need shaping again, simple and convenient, does not need to concentrate on the conductive cable in all circuits yet
10 inner hole center of zero sequence current mutual inductor.
Preferably, the iron core 101 in the present embodiment is laterally arranged in inner hole in flat track type with long and narrow inner hole
Show several threading holes 102.Using the big advantage of flat 101 lateral dimension of track type iron core, dexterously by breaker unit 30
Whole external cables directly through zero sequence current mutual inductor 10 with to breaker unit 30 realize wiring, to collect and detect leakage
Electric current.The threading hole 102 of the input terminal of breaker unit 30 or the wire frame of output end and zero sequence current mutual inductor 10 is opposite,
The quantity of threading hole 102 is identical as matched 30 quantity of breaker unit of institute.
Detection of electrical leakage tripping attachment provided in this embodiment is divided into two kinds, and one kind switching fracture without zero curve (N line), such as schemes
2 to shown in Fig. 4, and such detection of electrical leakage tripping attachment does not need the wire frame that cable is arranged on shell 109, and zero-sequence current is mutual
The threading hole 102 of sensor 10, which is each equipped with, takes electric piece 107, takes electric piece 107 to be connected with and takes electrical lead 103, electrical lead 103 is taken to be electrically connected
Connect disengaging deivce of earth leakage 20；Another band zero curve switchs fracture, as shown in Figure 6 to 8, is arranged on detection of electrical leakage tripping attachment
Zero curve wire frame is equipped with zero curve specifically on disengaging deivce of earth leakage 20 and switchs fracture, the threading hole of zero sequence current mutual inductor 10
One of 102 is concentric opposite with the wire frame of zero curve switch fracture, remaining threading hole 102 takes electric piece 107 configured with electric piece 107 is taken
It is connected with and takes electrical lead 103, electrical lead 103 is taken to be electrically connected disengaging deivce of earth leakage 20, leakage circuit breakers uses such detection of electrical leakage
Tripping attachment can save 1 pole breaker unit 30.
In this embodiment, zero sequence current mutual inductor 10 further includes shell 109, and iron core winding is placed in shell 109, shell
109 are equipped with the threading column 108 that two or more has the inner hole of both ends perforation, and threading column 108 is placed through the interior of iron core winding
Hole.Encapsulating has epoxide-resin glue in 109 inner space of shell, and epoxide-resin glue is placed in inside shell 109 for fixed and sealing
Element, take electric 107 one end of piece to be fixed on shell 109 and be located at the outside of threading hole 102, the other end is with respect to epoxide-resin glue
Protrusion.When detection of electrical leakage tripping attachment and breaker unit 30 are assembled, the wire frame of each breaker unit 30 corresponding one
A threading hole 102 takes electric piece 107 and the wire frame of breaker unit 30 to connect.
The assembling process of detection of electrical leakage tripping attachment provided in this embodiment: iron core 101 is fitted into protecting box 106, so
Coiling mutual inductor coil 104 and test loop coil 105 in protecting box 106,104 both ends of mutual inductor coil are respectively welded mutually afterwards
Sensor coil outer lead, 105 both ends soldering test circuit coil outer lead of test loop coil.It will be around making mutual inductor coil
104 and test loop coil 105 iron core around being assembled into shell 109, respectively take electric piece 107 to be respectively welded not as needed
Electrical lead 103 is taken with length, according to taking the length of electrical lead 103 that electric piece 107 will successively be taken to be packed into outside corresponding threading hole 102
Side.Finally in 109 inner space encapsulated epoxy resin glue of shell, epoxide-resin glue for fix and seal mutual inductor coil 104,
Test loop coil 105 takes electric piece 107 and various outer leads.
As shown in Figure 15 and Figure 16, disengaging deivce of earth leakage 20 mainly includes accessory mount 230 and is arranged in accessory mount 230
Interior tripping mechanism, electromagnetic trip coil block 210 and electronic circuit board component 220.Tripping mechanism mainly include push rod 201,
Locking-bar 203, shaft 202 and the trip shaft 204 to link with locking-bar 203, trip shaft 204 externally export tripping mechanical energy, push away
Move matched breaker actuation；Electromagnetic trip coil block 210 is mainly comprising electromagnetic coil, dynamic iron core 211, return spring 212, top
Bar 213；Electronic circuit board component 220 (i.e. PCBA) mainly comprising rectification reduction voltage circuit, signal contrast circuit, anti-jamming circuit,
Integrated circuit component 221, silicon-controlled 222 and test resistance 223 etc..Various connect is set on electronic circuit board component 220
Mouthful, 2 leads of zero sequence current mutual inductor are coupled on the ZCT1 and ZCT2 of electronic circuit board component 220, test loop line
On the Test1 and Test2 of 2 leads access electronic circuit board component 220 of circle, electric piece lead is taken to be coupled with L (firewire) and N
On (zero curve), 2 leads of electromagnetic trip coil are coupled on the Coil1 and Coil2 of electronic circuit board component.Its principle
When reaching specified action value for the electric leakage that neutral line current mutual inductor detects, integrated circuit exports trigger signal, triggers silicon-controlled
222 conducting, with silicon-controlled 222 concatenated electromagnetic coils obtain it is electric after, dynamic iron core 211 moves right, and pulls the push rod of tripping mechanism
201 make 202 rotation counterclockwise around the shaft of locking-bar 203, rotate with the trip shaft 204 that locking-bar 203 links, promotion and attachment
Matched breaker actuation.
Embodiment 2: please referring to Figure 10 and Figure 12, and the present embodiment provides a kind of leakage circuit breakers, as provided by embodiment 1
Detection of electrical leakage tripping attachment (hereinafter referred to as detection of electrical leakage tripping attachment) of preposition zero sequence current mutual inductor and at least one open circuit
Device unit 30 is assembled, and wherein zero sequence current mutual inductor 10 is configured at the input terminal of breaker unit 30 or the threading of output end
Direction front end, leakage circuit breakers access external cable when, all external cables pass through zero sequence current mutual inductor after directly with electric leakage
The wire frame wiring of breaker reaches the purpose of detection leakage current.
Breaker unit 30 is arranged side by side, the input terminal of each breaker unit 30 or the wire frame and zero-sequence current of output end
The concentric face of threading hole 102 of mutual inductor 10, disengaging deivce of earth leakage 20 are mounted on 30 side of breaker unit.
In the present embodiment, the size of 10 inner hole lateral dimension of zero sequence current mutual inductor and the terminals ruler of breaker unit 30
It is very little corresponding, for switching the detection of electrical leakage tripping attachment of fracture, threading hole in zero sequence current mutual inductor 10 without zero curve (N line)
102 quantity are identical as the number of poles of breaker unit 30, and the input terminal or output end of threading hole 102 and breaker unit 30
Wire frame correspond；It threads off attachment for the detection of electrical leakage with zero curve switch fracture, on zero sequence current mutual inductor 10
One of threading hole 102 is corresponding with the zero curve switch wire frame of fracture, remaining threading hole 102 and breaker unit 30
The wire frame of input terminal or output end corresponds.Access external cable in use, breaker unit 30 every pole unit cable
It is connected on breaker unit 30 after the threading hole 102 of zero sequence current mutual inductor 10 one by one, to reach detection electric leakage electricity
The purpose of stream.External cable is independent of each other in each threading hole 102, and insulation effect is good, and leakage circuit breakers is not easy to heat up.
Figure 10 is 3P+N type leakage circuit breakers provided in this embodiment, detection of electrical leakage tripping accessory tapes zero curve switch therein
Fracture, Figure 11 are existing 3P+N type leakage circuit breakers, and the leakage circuit breakers in leakage circuit breakers ratio Figure 11 in Figure 10 is saved
1 pole breaker unit 30.Zero sequence current mutual inductor 10 in Figure 10 is mounted on the terminals side of breaker unit 30, leakage
The width of electro-detection tripping attachment is only a modulus H, and the width of entire leakage circuit breakers is 4 modulus 4H.Showing in Figure 11
The round zero sequence current mutual inductor 40 having is mounted in detection of electrical leakage tripping attachment, the width of detection of electrical leakage tripping attachment and open circuit
The overall width of device unit 30 is identical, is four modulus 4H, and the width of entire leakage circuit breakers is 8 modulus 8H.Figure 10 ratio Figure 11
Reduce 4 modulus 4H.
Figure 12 3P type leakage circuit breakers provided in this embodiment, detection of electrical leakage tripping attachment therein switch disconnected without zero curve
Mouthful, the overall width of the leakage circuit breakers is four modulus 4H.It is existing 3P type leakage circuit breakers shown in Figure 13, it is therein
The overall width of detection of electrical leakage tripping attachment width and breaker unit 30 is mutually all 3 modulus 3H, the 3P leakage circuit breakers it is whole
Body width is 6 modulus 6H.Figure 12 ratio Figure 13 reduces 2 modulus 2H.
Detection of electrical leakage provided in this embodiment tripping attachment and the existing detection of electrical leakage using round mutual inductor are threaded off
Attachment comparison, product structure, product size, assembly method and in terms of index see Figure 14.
In conclusion the width dimensions of the disengaging deivce of earth leakage 20 of detection of electrical leakage tripping attachment provided in this embodiment only have
One modulus 18mm, therefore the leakage circuit breakers that detection of electrical leakage tripping attachment and breaker unit 30 are combined into only compares breaker
The width that unit 30 increases a modulus is dramatically saved using installation space and material cost compared with prior art.
Also, external cable is connected directly through after forward type zero sequence current mutual inductor 10 with breaker unit 30, and hard copper paint is not needed
Envelope curve greatlies simplify production technology, saves production cost.The parameter obtained from actual production shows have with existing
The detection of electrical leakage tripping attachment of 101 structure of annular iron core is compared, detection of electrical leakage tripping attachment overall cost provided by the invention
It is average to reduce about 30%.
The foregoing descriptions are merely the embodiment using the innovation technology contents, any those skilled in the art use this wound
The scope of the patents that the modifications and changes newly done, all category the innovation are advocated, and it is not limited to those disclosed embodiments.
Claims (11)
- The attachment 1. a kind of detection of electrical leakage of preposition zero sequence current mutual inductor is threaded off, it is characterised in that: including zero sequence current mutual inductor And disengaging deivce of earth leakage, zero sequence current mutual inductor are connect with disengaging deivce of earth leakage, zero-sequence current when cooperation breaker unit uses Mutual inductor is placed in breaker unit one end, and external cable is electrically connected after passing through zero sequence current mutual inductor with breaker unit, zero sequence Current transformer is for detecting whether the electric current passed through leaks electricity, and when electric leakage occurs, disengaging deivce of earth leakage executes trip action.
- The attachment 2. detection of electrical leakage of preposition zero sequence current mutual inductor according to claim 1 is threaded off, it is characterised in that: zero sequence Current transformer is set to outside disengaging deivce of earth leakage, cooperates breaker unit in use, disengaging deivce of earth leakage is set to breaker It simultaneously mechanically links with breaker unit unit side.
- The attachment 3. detection of electrical leakage of preposition zero sequence current mutual inductor according to claim 1 is threaded off, it is characterised in that: described Zero sequence current mutual inductor includes iron core, threading hole transversely arranged equipped with two or more and mutual insulating in iron core inner hole, iron Mutual inductor coil is wound on core, the both ends of the mutual inductor coil are respectively connected with mutual inductor coil outer lead, the mutual inductor Coil is electrically connected by mutual inductor coil outer lead with the electronic circuit board in disengaging deivce of earth leakage, when electric leakage occurs, electronics Wiring board, which issues signal, makes disengaging deivce of earth leakage execute trip action.
- The attachment 4. detection of electrical leakage of preposition zero sequence current mutual inductor according to claim 3 is threaded off, it is characterised in that: described Test loop coil is wound on iron core, the both ends of the test loop coil are respectively connected with test loop coil outer lead, institute It states test loop coil outer lead and is electrically connected the electronic circuit board.
- The attachment 5. detection of electrical leakage of preposition zero sequence current mutual inductor according to claim 4 is threaded off, it is characterised in that: described Zero sequence current mutual inductor further includes protecting box, and the shape of the protecting box is adapted with the shape of the iron core, and the iron core is set In the protecting box, the mutual inductor coil and the test loop coil are wrapped in formation iron core winding in protecting box.
- The attachment 6. detection of electrical leakage of preposition zero sequence current mutual inductor according to claim 5 is threaded off, it is characterised in that: described Zero sequence current mutual inductor further includes shell, and the iron core winding is placed in the shell, and the shell is equipped with two or more The threading column of inner hole with both ends perforation, the threading column are placed through the inner hole of the iron core winding.
- The attachment 7. detection of electrical leakage of preposition zero sequence current mutual inductor according to claim 6 is threaded off, it is characterised in that: described Encapsulating has epoxide-resin glue in housing interior volume, and epoxide-resin glue is placed in the element and electricity of interior of shell for fixed and sealing Jointing.
- The attachment 8. detection of electrical leakage of preposition zero sequence current mutual inductor according to claim 3 is threaded off, it is characterised in that: described Iron core is in flat track type.
- The attachment 9. detection of electrical leakage of the preposition zero sequence current mutual inductor according to claim 3 to 8 any one is threaded off, it is special Sign is: the threading hole is described to take electric piece to be connected with to take electrical lead configured with taking electric piece, described that electrical lead is taken to be electrically connected electronics Wiring board.
- The attachment 10. detection of electrical leakage of the preposition zero sequence current mutual inductor according to claim 3 to 8 any one is threaded off, Be characterized in that: there is the disengaging deivce of earth leakage zero curve to switch fracture, one of threading hole on the zero sequence current mutual inductor with The wire frame that the zero curve switchs fracture is corresponding, remaining described threading hole is described to take electric piece to be connected with electricity is taken to draw configured with taking electric piece Line, it is described that electrical lead is taken to be electrically connected electronic circuit board.
- 11. a kind of leakage circuit breakers, it is characterised in that: the preposition zero-sequence current as described in claims 1 to 10 any one is mutual The detection of electrical leakage tripping attachment of sensor and at least one breaker unit assembling combination form, and wherein zero sequence current mutual inductor configures It is all external when leakage circuit breakers accesses external cable in the input terminal of breaker unit or the threading direction front end of output end Cable, directly with the wire frame wiring of breaker unit, reaches the purpose of detection leakage current after zero sequence current mutual inductor.
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| CN201910432827.2A CN110120327A (en) | 2019-05-23 | 2019-05-23 | The detection of electrical leakage tripping attachment and leakage circuit breakers of preposition zero sequence current mutual inductor |
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| CN201910432827.2A CN110120327A (en) | 2019-05-23 | 2019-05-23 | The detection of electrical leakage tripping attachment and leakage circuit breakers of preposition zero sequence current mutual inductor |
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