CN109411221A - A kind of band self-test current transformer structure - Google Patents
A kind of band self-test current transformer structure Download PDFInfo
- Publication number
- CN109411221A CN109411221A CN201811528854.1A CN201811528854A CN109411221A CN 109411221 A CN109411221 A CN 109411221A CN 201811528854 A CN201811528854 A CN 201811528854A CN 109411221 A CN109411221 A CN 109411221A
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- Prior art keywords
- pin
- current transformer
- magnetic induction
- induction coil
- band self
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- 238000012360 testing method Methods 0.000 title claims abstract description 20
- 230000006698 induction Effects 0.000 claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The present invention relates to a kind of band self-test current transformer structures, including current transformer casing and magnetic induction coil.Magnetic induction coil is set to the inside of current transformer casing.The central part of current transformer casing is provided with centre bore.Centre bore inner sidewall edge is molded with the through-hole passed through for conducting wire.A pin, B pin, C pin and D pin are provided with outside current transformer casing.C pin and D pin are separately connected the both ends of magnetic induction coil.Present invention has the advantages that solving current transformer during installation needs the p-wire for manually passing around A-B, automated production is realized, is improved work efficiency and because of the fixation in the direction current transformer structure A-B, artificial anti-the occurrence of wearing p-wire B-A is avoided.
Description
Technical field
The present invention relates to current transformer technical field, especially a kind of band self-test current transformer structure.
Background technique
Traditional current transformer must wear a survey in current transformer according to national standard GB20044 when doing earth leakage protective
Line A-B is tried, which used for earth leakage protective device self-test.Usual p-wire is to use manually to pass around, and operating efficiency is low
Under, it cannot achieve automated production.If being used to manually pass around anisotropy when A type earth leakage protective and wearing into B-A, it will lead to electric leakage and protect
Shield device cannot be self-detected.To solve the above problems, the invention proposes a kind of band self-test current transformer structure, current transformer
Band self-test loop A, the port B realize automated production from structure, improve working efficiency and avoid and artificial counter wear p-wire
The occurrence of B-A.
Summary of the invention
Object of the present invention is to overcome deficiency in the prior art, a kind of band self-test current transformer structure is provided, it is real
The automated production for having showed current transformer is improved work efficiency and is kept away instead of the operation procedure for manually passing around p-wire
Artificial anti-the occurrence of wearing p-wire B-A is exempted from.
In order to solve the above-mentioned technical problem, the present invention is achieved through the following technical solutions:
A kind of band self-test current transformer structure, including current transformer casing and magnetic induction coil.The line of magnetic induction
Circle is set to the inside of the current transformer casing.The central part of the current transformer casing is provided with centre bore.It is described
Centre bore inner sidewall edge is molded with the through-hole passed through for conducting wire.Be provided with outside the current transformer casing A pin,
B pin, C pin and D pin.The C pin and D pin are separately connected the both ends of magnetic induction coil.By test when energized state
Key T, test electric current flow to A pin to B pin by firewire L, through first resistor R1, second resistance R2 and No composition loop current,
The loop current is through on magnetic induction coil output induced voltage to C pin, D pin, which is proportional to A pin, B pin
Leakage current, earth leakage protective can be performed effectively.
Preferably, the centre bore can be also cross the conducting wire of one and one or more quantity.
Preferably, the through-hole can wear a plain conductor and be bent into C pin and D pin on the same end face.
Preferably, the diameter of the through-hole is greater than 0.3mm.
Preferably, the current transformer casing is made of ambroin.
Present invention has the advantages that solving current transformer during installation needs the p-wire for manually passing around A-B, realize
Automated production, improves work efficiency and because of the fixation in the direction current transformer structure A-B, avoids and artificial counter wears p-wire
The occurrence of B-A.
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
Detailed description of the invention
Fig. 1 is structure chart of the invention；
Fig. 2 is main view of the invention；
Fig. 3 is threading figure of the invention；
Fig. 4 is electric diagram of the invention；
Fig. 5 is line map of the invention.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
Such as Fig. 1 is simultaneously combined shown in Fig. 2 to Fig. 5, a kind of band self-test current transformer structure, including current transformer casing 1
And magnetic induction coil.The magnetic induction coil is set to the inside of the current transformer casing 1.The current transformer casing
1 central part is provided with centre bore 2.The 2 inner sidewall edge of centre bore is molded with the through-hole 3 passed through for conducting wire.Institute
It states and is provided with A pin A, B pin B, C pin C and D pin D outside current transformer casing 1.The C pin C and D pin D difference
Connect the both ends of magnetic induction coil.The centre bore 2 can be also cross the conducting wire of one and one or more quantity.The through-hole 3
A plain conductor can be worn and be bent into C pin C and D pin D on the same end face.
Wherein, the diameter of the through-hole 3 is greater than 0.3mm.Current transformer casing 1 is made of ambroin.
The present invention, which solves current transformer during installation, needs the p-wire for manually passing around A-B, realizes automated production,
It improves work efficiency and because of the fixation in the direction current transformer structure A-B, avoids the artificial anti-hair for wearing p-wire B-A situation
It is raw.
Through-hole 3 passes through A-B for current transformer self-checking and the pin port (end A of forming circuit for hard conducting wire
Mouth, the port B).Current transformer is internally provided with magnetic induction coil and is provided with output C pin C outside current transformer casing 1
With D pin D.C pin C, D pin D is for exporting induced voltage after current transformer induction A-B loop current.Current transformer
Centre bore 2 can be also cross the conducting wire (such as: firewire L, zero curve N) of one and one or more quantity.The A of current transformer casing 1
Pin A, B pin B, C pin C and D pin D is on the same end face.Self-test port A pin A, B pin B is moulded in Current Mutual Inductance
It can be welded on pcb board simultaneously on device shell 1 with C pin C, D pin D.
Working principle: such as Fig. 5, when energized state, presses feeler switch T, tests electric current by firewire L and flows to A pin A to B pin B,
Loop current is constituted through first resistor R1, second resistance R2 and No, which exports induced voltage to C through magnetic induction coil
On pin C, D pin D, which is proportional to the leakage current of A pin A, B pin B, can perform effectively earth leakage protective.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (5)
1. a kind of band self-test current transformer structure, it is characterised in that: including current transformer casing (1) and magnetic induction coil,
The magnetic induction coil is set to the inside of the current transformer casing (1), the central part of the current transformer casing (1)
It is provided with centre bore (2), centre bore (2) the inner sidewall edge is molded with the through-hole passed through for conducting wire (3), the electricity
It is provided with A pin (A), B pin (B), C pin (C) and D pin (D) outside current transformer shell (1), the C pin (C) and D draw
Foot (D) is separately connected the both ends of magnetic induction coil, and when energized state presses feeler switch T, tests electric current by firewire L and flows to A pin (A)
To B pin (B), loop current is constituted through first resistor R1, second resistance R2 and No, which exports through magnetic induction coil
On induced voltage to C pin (C), D pin (D), which is proportional to the leakage current of A pin (A), B pin (B), can
Perform effectively earth leakage protective.
2. a kind of band self-test current transformer structure as described in claim 1, it is characterised in that: the centre bore (2) can be same
When across one and one or more quantity conducting wire.
3. a kind of band self-test current transformer structure as described in claim 1, it is characterised in that: the through-hole (3) can wear one
Root plain conductor is simultaneously bent into C pin (C) and D pin (D) on the same end face.
4. a kind of band self-test current transformer structure as described in claim 1, it is characterised in that: the diameter of the through-hole (3)
Greater than 0.3mm.
5. a kind of band self-test current transformer structure as described in claim 1, it is characterised in that: the current transformer casing
(1) it is made of ambroin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811528854.1A CN109411221A (en) | 2018-12-10 | 2018-12-10 | A kind of band self-test current transformer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811528854.1A CN109411221A (en) | 2018-12-10 | 2018-12-10 | A kind of band self-test current transformer structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109411221A true CN109411221A (en) | 2019-03-01 |
Family
ID=65459090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811528854.1A Pending CN109411221A (en) | 2018-12-10 | 2018-12-10 | A kind of band self-test current transformer structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109411221A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112366075A (en) * | 2020-11-09 | 2021-02-12 | 青岛鼎信通讯股份有限公司 | Be applied to full hard needle structure mutual-inductor of single-phase table |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2831363Y (en) * | 2005-09-22 | 2006-10-25 | 淄博卓尔电器有限公司 | Current transformer for electricity leakage protector |
| DE102007037058A1 (en) * | 2007-08-03 | 2009-02-19 | Siemens Ag | Current transformer module for energy and power measuring device, has housing and wire, which is linearly guided from free end through entry point and from another free end through exit point |
| CN201319312Y (en) * | 2008-11-25 | 2009-09-30 | 北京瑞奇恩电器设备有限公司 | Core-piercing current transformer with high precision |
| CN201629221U (en) * | 2010-03-30 | 2010-11-10 | 符婵 | Zero sequence transformer of power leakage protection device |
| US20110025305A1 (en) * | 2009-07-31 | 2011-02-03 | James Douglas Lint | Current sensing devices and methods |
| CN202871546U (en) * | 2012-07-26 | 2013-04-10 | 北京中凯科电电力技术有限公司 | Current transformer |
| CN203931968U (en) * | 2014-06-23 | 2014-11-05 | 李纯 | The shunting syndeton of zero sequence current mutual inductor in residual current circuit breaker |
| CN204464031U (en) * | 2015-01-14 | 2015-07-08 | 厦门振泰成科技有限公司 | A kind of contact pin type current transformer |
| CN208970330U (en) * | 2018-12-10 | 2019-06-11 | 浙江诚富电器科技有限公司 | A kind of band self-test current transformer structure |
-
2018
- 2018-12-10 CN CN201811528854.1A patent/CN109411221A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2831363Y (en) * | 2005-09-22 | 2006-10-25 | 淄博卓尔电器有限公司 | Current transformer for electricity leakage protector |
| DE102007037058A1 (en) * | 2007-08-03 | 2009-02-19 | Siemens Ag | Current transformer module for energy and power measuring device, has housing and wire, which is linearly guided from free end through entry point and from another free end through exit point |
| CN201319312Y (en) * | 2008-11-25 | 2009-09-30 | 北京瑞奇恩电器设备有限公司 | Core-piercing current transformer with high precision |
| US20110025305A1 (en) * | 2009-07-31 | 2011-02-03 | James Douglas Lint | Current sensing devices and methods |
| CN201629221U (en) * | 2010-03-30 | 2010-11-10 | 符婵 | Zero sequence transformer of power leakage protection device |
| CN202871546U (en) * | 2012-07-26 | 2013-04-10 | 北京中凯科电电力技术有限公司 | Current transformer |
| CN203931968U (en) * | 2014-06-23 | 2014-11-05 | 李纯 | The shunting syndeton of zero sequence current mutual inductor in residual current circuit breaker |
| CN204464031U (en) * | 2015-01-14 | 2015-07-08 | 厦门振泰成科技有限公司 | A kind of contact pin type current transformer |
| CN208970330U (en) * | 2018-12-10 | 2019-06-11 | 浙江诚富电器科技有限公司 | A kind of band self-test current transformer structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112366075A (en) * | 2020-11-09 | 2021-02-12 | 青岛鼎信通讯股份有限公司 | Be applied to full hard needle structure mutual-inductor of single-phase table |
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