CN106024300A - Zero sequence current transformer capable of preventing cable from loosening - Google Patents
Zero sequence current transformer capable of preventing cable from loosening Download PDFInfo
- Publication number
- CN106024300A CN106024300A CN201610476418.9A CN201610476418A CN106024300A CN 106024300 A CN106024300 A CN 106024300A CN 201610476418 A CN201610476418 A CN 201610476418A CN 106024300 A CN106024300 A CN 106024300A
- Authority
- CN
- China
- Prior art keywords
- press
- sequence current
- zero sequence
- core pipe
- rod
- 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.)
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Classifications
-
- 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
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
-
- 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
Abstract
The invention relates to a zero sequence current transformer capable of preventing a cable from loosening. The zero sequence current transformer comprises a press ring, a core tube, a core rod, a current transformer and two press claw assemblies, wherein the press ring is a hollow sleeve, the core tube is accommodated in the press ring, the core tube is coaxially arranged in the press ring, and two ends of the core tube are symmetrically and movably connected with the two press claw assemblies respectively; each press claw assembly comprises a plurality of press claws distributed on the circumference of the core tube, each press claw comprises a press claw rod and a press head located at the lower end of the press claw rod, each press claw rod comprises an upper rod and a lower rod which are located on the straight line and can be rotationally hinged together in the axial direction, each upper rod is a rod part provided with threads, the upper end part of each upper rod perpendicularly penetrates through the side wall of the press ring, a hand wheel is arranged at the end part of each upper rod, the lower end part of each lower rod penetrates through the core tube, and the press heads are arranged in the core tube. The zero sequence current transformer has the advantages as follows: the zero sequence current transformer is provided with a press claw type locking mechanism, thus, a mounting position doesn't need to be reserved, and the mounting is easy.
Description
Technical field
The present invention relates to a kind of technical field of electric power, particularly to a kind of zero sequence current mutual inductor preventing cable from loosening.
Background technology
The ultimate principle of zero-sequence current protection is based on Kirchhoff's current law (KCL): flow into the telegram in reply of any node in circuit
The algebraical sum of stream is equal to zero.In the case of circuit and electrical equipment are normal, the vector of each phase current is equal to zero, therefore, zero
The secondary side winding no signal output of sequence current transformer, executive component is failure to actuate.When occurring to get an electric shock or each during leak current fault
The vector of phase current is not zero, and fault current makes to produce in the iron core of zero sequence current mutual inductor magnetic flux, zero sequence current mutual inductor
Produced electric current is zero-sequence current.When protection mechanism receives this zero sequence current signal, can take accordingly according to electrical leakage quantity
Protection act.
Mostly the mounting means of existing zero sequence current mutual inductor is to use flange install fixing or use bonding mode to fix,
Its installation site is it is generally required to reserve, so that the application of zero sequence current mutual inductor is by more restriction.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of zero sequence current mutual inductor preventing cable from loosening.
For solving above-mentioned technical problem, the technical scheme is that a kind of zero sequence current mutual inductance preventing cable from loosening
Device, its innovative point is: include a pressure ring, a core pipe, a plug, a current transformer and two casing pressure claw assemblies；Described pressure ring
Being a hollow sleeve, its inner containment has a core pipe, described core pipe to be co-axially located in pressure ring, and these core pipe two ends are respectively symmetrically work
Be dynamically connected a set of paw assembly, and described paw assembly includes some paws arranged along core pipe periphery, and described paw includes
Paw bar and be positioned at the pressure head of paw bar bottom, described paw bar includes in a straight line and can be hinged on one around axial rotation
The upper boom risen and lower beam, described upper boom is a threaded rod member, and its upper end passes perpendicularly through pressure ring sidewall, and in its end
Arranging a handwheel, described lower beam bottom passes core pipe, and described pressure head is arranged on inside core pipe.
Further, described paw bar lower beam lower section is polygon, described core pipe has corresponding changeable
Shape hole.
Further, described pressure is grabbed bar upper boom upper end and is threadeded with pressure ring, and its top has a polygon sliding shoe, institute
State handwheel side there is a receiving sliding shoe to slide up and down and non-rotary sliding tray.
Further, described every casing pressure claw assembly at least three paws.
Further, it is polygon that described pressure grabs bar upper boom upper end, and same in polygonal hole through on pressure ring, and
Its end has screw thread, and described handwheel side has the screwed hole of boom end in a receiving.
It is an advantage of the current invention that:
(1) zero sequence current mutual inductor of the present invention is owing to carrying press claw type retaining mechanism, it is not necessary to reserved installation position, it is easy to peace
Dress.
(2) present invention uses two casing pressure claw assemblies to be clamped on same cable, has the effect of dual fail-safe, even if wherein one
Set in use goes wrong, its service behaviour of the most another set of guarantee.
(3) use sliding shoe and the cooperation of sliding tray, rotate handwheel and will make between paw bar and pressure ring because screw thread connects
Practicing midwifery raw transmission, produce stroke while rotation, this stroke shows as sliding shoe and moves in sliding tray, outside handwheel
Portion can't see rotation, and i.e. convenient locking is the most elegant in appearance.
(4) use disposed thread hole in handwheel, moving up and down when screwing is hidden in handwheel, good looking appearance.
Accompanying drawing explanation
Fig. 1 be the present invention a kind of prevent cable loosen zero sequence current mutual inductor embodiment 1 remove current transformer after
Schematic cross-section.
Fig. 2 be the present invention a kind of prevent cable loosen zero sequence current mutual inductor embodiment 2 remove current transformer after
Schematic cross-section.
Fig. 3 be the present invention a kind of prevent cable loosen zero sequence current mutual inductor remove current transformer lateral side view.
Detailed description of the invention
Embodiment 1
As shown in Figure 1, Figure 3, the invention discloses a kind of zero sequence current mutual inductor preventing cable from loosening, including a pressure ring 5,
Core pipe 6, one plug 7, current transformer and two casing pressure claw assemblies；Pressure ring 5 is a hollow sleeve, and its inner containment has a core pipe
6, core pipe 6 is co-axially located in pressure ring 5, and these core pipe 6 two ends are respectively symmetrically and are connected with a set of paw assembly, paw assembly bag
Including some paws arranged along core pipe 6 periphery, paw includes paw bar and is positioned at the pressure head 8 of paw bar bottom, paw
Bar includes in a straight line and can be around the hinged upper boom 3 of axial rotation and lower beam 4, and upper boom 3 is a threaded rod member,
Its upper end passes perpendicularly through pressure ring 5 sidewall, and arranges a handwheel 2 in its end, and lower beam 4 bottom passes core pipe 6, and pressure head 8 sets
Put inside core pipe.Paw bar lower beam 4 lower section is polygon, and core pipe 6 has corresponding shape changeable hole；Pressure grabs bar
Upper boom 3 upper end has a polygon sliding shoe 31, and handwheel 2 side has a receiving sliding shoe 31 and slides up and down and non-rotary cunning
Dynamic groove 21；Every casing pressure claw assembly at least three paws.
Embodiment 2
Such as Fig. 2, shown, on the basis of embodiment 1, it is polygon that pressure grabs bar upper boom 3 upper end, and same through on pressure ring 5
In polygonal hole, and its end has screw thread, and handwheel 2 side has the screwed hole 22 of receiving upper boom 3 end.
Ultimate principle and the principal character of the present invention have more than been shown and described.Skilled person will appreciate that of the industry,
The present invention is not restricted to the described embodiments, the principle that the present invention is simply described described in above-described embodiment and description,
Without departing from the spirit and scope, the present invention also has various changes and modifications, and these changes and improvements all fall
Enter in scope of the claimed invention.Claimed scope is defined by appending claims and equivalent thereof.
Claims (5)
1. one kind prevent cable loosen zero sequence current mutual inductor, it is characterised in that: include a pressure ring, a core pipe, a plug, one
Current transformer and two casing pressure claw assemblies；Described pressure ring is a hollow sleeve, and its inner containment has a core pipe, and described core pipe is coaxial
Being arranged in pressure ring, these core pipe two ends are respectively symmetrically and are connected with a set of paw assembly, and described paw assembly includes some edges
The paw that core pipe periphery is arranged, described paw includes paw bar and is positioned at the pressure head of paw bar bottom, described paw bar
Including in a straight line and can be around the hinged upper boom of axial rotation and lower beam, described upper boom be a threaded rod member,
Its upper end passes perpendicularly through pressure ring sidewall, and arranges a handwheel in its end, and described lower beam bottom passes core pipe, described pressure head
It is arranged on inside core pipe.
A kind of zero sequence current mutual inductor preventing cable from loosening the most according to claim 1, it is characterised in that: described paw
Bar lower beam lower section is polygon, and described core pipe has corresponding shape changeable hole.
A kind of zero sequence current mutual inductor preventing cable from loosening the most according to claim 1, it is characterised in that: described pressure is grabbed
Threadeding with pressure ring in bar upper boom upper end, its top has a polygon sliding shoe, and described handwheel side has a receiving and slides
Block slides up and down and non-rotary sliding tray.
A kind of zero sequence current mutual inductor preventing cable from loosening the most according to claim 1, it is characterised in that: described often overlap
Paw assembly at least three paws.
A kind of zero sequence current mutual inductor preventing cable from loosening the most according to claim 1, it is characterised in that: described pressure is grabbed
Bar upper boom upper end is polygon, and same in polygonal hole through on pressure ring, and its end has screw thread, described handwheel one
Side has the screwed hole of boom end in a receiving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610476418.9A CN106024300B (en) | 2016-06-27 | 2016-06-27 | A kind of zero sequence current mutual inductor for preventing cable from loosening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610476418.9A CN106024300B (en) | 2016-06-27 | 2016-06-27 | A kind of zero sequence current mutual inductor for preventing cable from loosening |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106024300A true CN106024300A (en) | 2016-10-12 |
| CN106024300B CN106024300B (en) | 2017-09-08 |
Family
ID=57083633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610476418.9A Active CN106024300B (en) | 2016-06-27 | 2016-06-27 | A kind of zero sequence current mutual inductor for preventing cable from loosening |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106024300B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113628863A (en) * | 2021-08-12 | 2021-11-09 | 德清盖格电子有限公司 | Zero sequence current transformer |
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|---|---|---|---|---|
| CN101286412A (en) * | 2007-02-02 | 2008-10-15 | 湖北盛佳电器设备有限公司 | Straight-through current transformer for measuring voltage by penetrating wire wrapper |
| CN201302917Y (en) * | 2008-02-01 | 2009-09-02 | 湖北盛佳电器设备有限公司 | Straight-through current transformer used for voltage obtaining conveniently |
| CN201465789U (en) * | 2009-06-04 | 2010-05-12 | 北京恒源利通电力技术有限公司 | Open type current mutual inductor |
| WO2012130687A1 (en) * | 2011-03-25 | 2012-10-04 | Alstom Technology Ltd | Current transformer for three-phase equipment |
| CN105575641A (en) * | 2016-01-15 | 2016-05-11 | 胡妍 | Zero sequence current mutual inductor for preventing cable from being loosened |
| CN105609281A (en) * | 2016-01-15 | 2016-05-25 | 胡妍 | Zero-sequence current transformer for preventing cable from loosening |
| CN206003585U (en) * | 2016-06-27 | 2017-03-08 | 国网江苏省电力公司盐城供电公司 | A kind of zero sequence current mutual inductor preventing cable from loosening |
-
2016
- 2016-06-27 CN CN201610476418.9A patent/CN106024300B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101286412A (en) * | 2007-02-02 | 2008-10-15 | 湖北盛佳电器设备有限公司 | Straight-through current transformer for measuring voltage by penetrating wire wrapper |
| CN201302917Y (en) * | 2008-02-01 | 2009-09-02 | 湖北盛佳电器设备有限公司 | Straight-through current transformer used for voltage obtaining conveniently |
| CN201465789U (en) * | 2009-06-04 | 2010-05-12 | 北京恒源利通电力技术有限公司 | Open type current mutual inductor |
| WO2012130687A1 (en) * | 2011-03-25 | 2012-10-04 | Alstom Technology Ltd | Current transformer for three-phase equipment |
| CN105575641A (en) * | 2016-01-15 | 2016-05-11 | 胡妍 | Zero sequence current mutual inductor for preventing cable from being loosened |
| CN105609281A (en) * | 2016-01-15 | 2016-05-25 | 胡妍 | Zero-sequence current transformer for preventing cable from loosening |
| CN206003585U (en) * | 2016-06-27 | 2017-03-08 | 国网江苏省电力公司盐城供电公司 | A kind of zero sequence current mutual inductor preventing cable from loosening |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113628863A (en) * | 2021-08-12 | 2021-11-09 | 德清盖格电子有限公司 | Zero sequence current transformer |
| CN113628863B (en) * | 2021-08-12 | 2023-01-13 | 德清盖格电子有限公司 | Zero sequence current transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106024300B (en) | 2017-09-08 |
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