CN108508253A - A kind of High Frequency Current Sensor for cable local discharge detection - Google Patents
A kind of High Frequency Current Sensor for cable local discharge detection Download PDFInfo
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- CN108508253A CN108508253A CN201810240938.9A CN201810240938A CN108508253A CN 108508253 A CN108508253 A CN 108508253A CN 201810240938 A CN201810240938 A CN 201810240938A CN 108508253 A CN108508253 A CN 108508253A
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- semicircular ring
- ring box
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- frequency current
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- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 239000002184 metal Substances 0.000 claims abstract description 45
- 229910052751 metal Inorganic materials 0.000 claims abstract description 45
- 230000007246 mechanism Effects 0.000 claims description 17
- 230000009471 action Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
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- 230000007257 malfunction Effects 0.000 description 1
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- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
- G01R15/186—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using current transformers with a core consisting of two or more parts, e.g. clamp-on type
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Relating To Insulation (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention discloses a kind of High Frequency Current Sensors for cable local discharge detection comprising：The metal case of circular ring shape, cavity with circular ring shape in it, the metal case includes the first semicircular ring box body and the second semicircular ring box body being stitched together, one end of the first semicircular ring box body and the second semicircular ring box body is rotatably connected, and lock is equipped between the first semicircular ring box body and the other end of the second semicircular ring box body；The magnetic core of two semi-circular shape is respectively arranged in the first semicircular ring box body and the second semicircular ring box body, in the cavity of the circular ring shape；It is wound with wire coil on one of magnetic core of two semi-circular shape；Insulating washer is set between metal case and magnetic core；Connector is connect with the wire coil；Two sliding blocks being arranged in pairs are sheathed on respectively on the first semicircular ring box body and the second semicircular ring box body；At least two elastic elements are respectively correspondingly arranged between each sliding block and semicircular ring box body corresponding with the sliding block.
Description
Technical field
The present invention relates to a kind of sensor more particularly to a kind of sensors for Partial Discharge Detection.
Background technology
With constantly increasing for urban distribution network power load, the probability of malfunction of power cable also greatly increases, and carries out electric power
Cable local discharge detection, which ensures, is of great significance to the safe and stable operation of electric system.
The detection method for local discharge of current power cable includes mainly broadband electromagnetical coupled method, superfrequency method and ultrasound
Wave detection method.When detecting power cable shelf depreciation using ultrasonic Detection Method and superfrequency method, since signal decaying is fast, detection
Effective range it is smaller.In addition, the running environment of power cable is complicated, interference is strong, mobile phone signal, car engine ignition,
Mechanical vibration noise can all produce serious influence to the accuracy of superfrequency method, ultrasonic Detection Method.Therefore, cable office at present
Portion's discharge examination mainly uses broadband electromagnetical coupled method.
Broadband electromagnetical coupled method uses high frequency sensors.Existing high frequency sensors mostly use greatly pincers currently on the market
Shape structure, including：One BNC or N connector, metal shielding box (left and right two halves), two semicircular magnetic cores, one of them
The wire coil of certain the number of turns, the both ends of coil and the BNC or N-type for being fixed on metal shielding box are wound on the magnetic core of semicircle
Connector connects, and the detection of shelf depreciation is realized by the external integrating resistor of coil.
In the partial discharge test for carrying out cable, high frequency sensors are stuck on cable body or ground wire, wherein cable sheet
The effect tested on body can be much better than the test effect on cable grounding line, and cable body is with the difference of voltage class, outer diameter change
Change larger, centimetre is differed from several centimetres to more than ten, in order to test the cable body of different voltages grade, generally require different sizes
High frequency sensors.Also, the internal diameter size of high frequency sensors is generally significantly greater than the outer diameter of cable body, during use not
Convenient for fixation, easily slided along cable body, in addition, for the occasion tested on ground wire, it is general relatively thin due to being grounded
(be less than 5 centimetres), and when high frequency sensors are stuck on ground wire, can be slided along ground wire, it is bad for cable laying operating mode
Occasion, such as cable shaft, cable duct, frequent ponding, high frequency sensors can be fallen into ponding, and simultaneously shadow is damaged to high frequency sensors
Ring test result.
Based on this, it is expected that obtaining a kind of High Frequency Current Sensor, the High Frequency Current Sensor is required when can be according to test
Testee such as cable body diameter flexible modulation sensor itself inner diameter size, be adaptedly fixedly connected on by
It surveys on object, is not easy to fall abjection so that the High Frequency Current Sensor is widely used in the cable body partial discharge of each voltage class
In the test of the ground wire partial discharge of test and various specifications.
Invention content
The purpose of the present invention is to provide a kind of High Frequency Current Sensor for cable local discharge detection, the high-frequency electricals
Flow sensor fundamentally solves different voltages grade, the cable of different dimensions is tested in partial discharge by structure optimization
When cause it to be difficult to problem general and that sensor inconvenience is fixed when using due to sensor internal diameter size difference so that the height
Frequency current sensor can be widely used in the cable of various specifications, and due to simple in structure, and the High Frequency Current Sensor is also
Has the advantages that easily operated fixation.
Based on above-mentioned purpose, the present invention proposes a kind of High Frequency Current Sensor for cable local discharge detection,
Including：
The metal case of circular ring shape, in the cavity with circular ring shape, the metal case includes the to be stitched together
One end of one semicircular ring box body and the second semicircular ring box body, the first semicircular ring box body and the second semicircular ring box body rotatably connects
It connects, lock is equipped between the first semicircular ring box body and the other end of the second semicircular ring box body, the lock has locking work
Position and unlock station, in the unlock station, the first semicircular ring box body and the second semicircular ring box body opposite can be opened；
The magnetic core of two semi-circular shape is respectively arranged in the first semicircular ring box body and the second semicircular ring box body, with
In the cavity of the circular ring shape；It is wound with wire coil on one of magnetic core of described two semi-circular shape；
Insulating washer is set between metal case and magnetic core；
Connector is connect with the wire coil；
The High Frequency Current Sensor further includes：
Two sliding blocks being arranged in pairs, are sheathed on respectively on the first semicircular ring box body and the second semicircular ring box body；
At least two elastic elements, be respectively correspondingly arranged in each sliding block and semicircular ring box body corresponding with the sliding block it
Between；
Wherein, two sliding blocks can under external force, and the diametric(al) along the metal case of the circular ring shape is slided opposite to each other
The elastic element is moved and compresses, so that the distance between the proximal face of two sliding blocks becomes larger；When external force is removed, two cunnings
Block relative motion under the action of the elastic force of elastic element, so that the distance between proximal face of two sliding blocks reduces, with
Metal case is set to be clamped on testee.
In technical solutions according to the invention, the first semicircular ring box body and the second semicircular ring box of High Frequency Current Sensor
Body is spliced using snap close mode so that High Frequency Current Sensor performance of the present invention is stablized, and testing result is not easy out
Now fluctuate.
In addition, there is reinforcement effect after the lock locking, the fixed structure of High Frequency Current Sensor is avoided built on the sand
Generated shaking problem, improves the performance of sensor, solves that sensor performance is unstable, differs from structure design itself
The problem of cause.It should be noted that in technical solutions according to the invention, the insulating washer is for being isolated magnetic core and gold
Belong to box body, magnetic core is avoided to be in direct contact with metal case.
When work, lock is opened so that the lock is in unlock station, the first semicircular ring box body and the second semicircular ring box
Body opposite can be opened, by the first semicircular ring box of the High Frequency Current Sensor of the present invention for cable local discharge detection
Body and the second semicircular ring box body clamp the testee such as cable body for needing to measure, i.e., testee are placed in the first semicircle
The circle ring center position of ring box body and the second semicircular ring box body, conducting electric current make the electric current of testee be sensed from high-frequency current
Device centrally through, be closed lock, by the external test equipment of connector can carry out testee shelf depreciation test.
During testee is clamped by the first semicircular ring box body and the second semicircular ring box body, due to testee
The proximal face of two sliding blocks is contacted, i.e., testee has strutted two sliding blocks, at this point, sliding block is under external force, along described
The elastic element is slided and compressed to the diametric(al) of the metal case of circular ring shape opposite to each other so that the proximal face of two sliding blocks it
Between distance become larger so that testee can be positioned in the metal case of circular ring shape；When testee no longer struts
Two sliding blocks, i.e., when external force is removed, two sliding blocks relative motion under the action of the elastic force of elastic element, so that two sliding blocks
The distance between proximal face reduce so that metal case is clamped on testee.Pass through above-mentioned mechanism so that institute
It states High Frequency Current Sensor to be fixed on testee, without arbitrarily moving along testee, to reach the height
Frequency current sensor is fixed on the purpose of testee.
In view of High Frequency Current Sensor is close to the clamping action of testee and the elastic force of elastic element in the present case
Cut phase is closed, and therefore, in order to improve clamping force, the quantity of elastic element is set as at least two, in addition, being set as at least two
Elastic element is also beneficial to improve the firm of the high frequency sensors internal structure.
Further, in order to improve the compactness of sliding block and testee surface, to be conducive to High Frequency Current Sensor folder
Tight testee, in High Frequency Current Sensor of the present invention, the proximal face of the sliding block is the arc surface of indent.
Further, in High Frequency Current Sensor of the present invention, the first semicircular ring box body and the second semicircle
Sliding block fixing mechanism is fixed on ring box body respectively, wherein each sliding block fixing mechanism includes：Two be arranged in pairs
Fixed plate, the fixed plate are fixedly connected with the first corresponding semicircular ring box body or the second semicircular ring box body, two fixations
The inner wall of plate forms the sliding rail slided for sliding block.
In said program, sliding block fixing mechanism only slides in sliding rail for limiting two sliding blocks, and can not be in its other party
It moves up.
In some preferred embodiments, mounting hole is set in fixed plate and metal case, passes through fixing piece example
As fixed plate is fixedly connected on corresponding first semicircular ring box body or the second semicircular ring box body by screw.
Further, in High Frequency Current Sensor of the present invention, the elastic element includes spring.
Further, in order to improve clamping force of the sliding block when clamping testee, in high-frequency current of the present invention
In sensor, at least two springs are equipped between each sliding block and semicircular ring box body corresponding with the sliding block.
Further, in High Frequency Current Sensor of the present invention, the madial wall of the proximal face of the sliding block with
And it is offered on the lateral wall of semicircular ring box body for the accommodating Blind locating holes with retaining spring end.
In technical solutions according to the invention, lateral wall refers to the wall of the lateral surface positioned at annular cavity.
Further, in High Frequency Current Sensor of the present invention, the lock is set to inside metal case.
In technical solutions according to the invention, since lock is set to inside metal case, thus metal case is reduced
Volume, increase the portability of High Frequency Current Sensor.
Further, in High Frequency Current Sensor of the present invention, the peripheral surface of the metal case is equipped with U-shaped
Groove, the connector are set in the U-shaped groove.
In said program, U-shaped groove avoids the damage collided with to the connector for protecting the connector.
Further, in High Frequency Current Sensor of the present invention, the connector is BNC connector
Further, for the ease of the progress of installing and dismounting, in High Frequency Current Sensor of the present invention, the gold
It includes box body ontology and the lid that is detachably connected with box body ontology to belong to box body.
It should be noted that in technical solutions according to the invention, the sliding block and/or sliding block fixing mechanism can be with
Using insulating materials.
High Frequency Current Sensor of the present invention for cable local discharge detection has the following advantages：
(1) High Frequency Current Sensor of the present invention for cable local discharge detection is by structure optimization, from root
The cable of different voltages grade, different dimensions is solved in sheet when partial discharge is tested since sensor internal diameter size difference is led
It is caused to be difficult to problem general and that sensor inconvenience is fixed when using so that the High Frequency Current Sensor can be widely used in
The cable of various specifications.
(2) since the High Frequency Current Sensor is simple in structure, thus, High Frequency Current Sensor also has easily operated
It is fixed, and fixed advantage.
Description of the drawings
Fig. 1 is the High Frequency Current Sensor of the present invention for cable local discharge detection under a kind of embodiment
Overall structure diagram.
Fig. 2 is the High Frequency Current Sensor of the present invention for cable local discharge detection under a kind of embodiment
Entirety sectional view.
Fig. 3 shows the High Frequency Current Sensor of the present invention for cable local discharge detection in a kind of embodiment party
The structure of sliding block under formula.
Fig. 4 shows the High Frequency Current Sensor of the present invention for cable local discharge detection in a kind of embodiment party
The structure of sliding block fixing mechanism under formula.
Fig. 5 shows the High Frequency Current Sensor of the present invention for cable local discharge detection in a kind of embodiment party
The structure of elastic element under formula.
Fig. 6 shows the High Frequency Current Sensor of the present invention for cable local discharge detection in a kind of embodiment party
The connection structure between sliding block and elastic element, sliding block fixing mechanism under formula.
Specific implementation mode
It is detected for cable local discharge to of the present invention below in conjunction with Figure of description and specific embodiment
High Frequency Current Sensor make further explanation, however the explanation and illustration is not to technical scheme of the present invention structure
At improper restriction.
Fig. 1 is the High Frequency Current Sensor of the present invention for cable local discharge detection under a kind of embodiment
Overall structure diagram.
As shown in Figure 1, in the present embodiment, the high frequency sensors 1 for cable local discharge detection include circular ring shape
Metal case 11, in circular ring shape cavity, metal case includes 111 He of the first semicircular ring box body being stitched together
Second semicircular ring box body 112, the first semicircular ring box body 111 and the second semicircular ring box body 112 are equipped with lid 12, and lid 12 passes through
Screw is realized with the mounting hole 121 set on 12 upper surface of the first semicircular ring box body 111, the second semicircular ring box body 112 and lid
Being detachably connected between lid 12 and the first semicircular ring box body 111 and the second semicircular ring box body 112.
Certainly, those skilled in the art are it is envisioned that in some other embodiments, lid 12 and
Being detachably connected between one semicircular ring box body 111 and the second semicircular ring box body 112 can also realize by other means, such as
By the pin hole of bolt and the first semicircular ring box body 111, the second semicircular ring box body 112 and the setting of 12 upper surface of lid, or
It is the rivet hole being arranged by rivet and the first semicircular ring box body 111, the second semicircular ring box body 112 and 12 upper surface of lid,
To realize being detachably connected between lid 12 and the first semicircular ring box body 111 and the second semicircular ring box body 112.
In the present embodiment, one end of the first semicircular ring box body 111 and the second semicircular ring box body 112 passes through hinge 114
Realization is rotatably connected, and lock 113 is equipped between the first semicircular ring box body 111 and the other end of the second semicircular ring box body 112, is
Reduce the volume of High Frequency Current Sensor 1, lock 113 is set to the inside of metal case 11, lock 113 have locking station and
Station is unlocked, when lock 113 is when unlocking station, the first semicircular ring box body 111 and the second semicircular ring box body 112 opposite can be beaten
It opens.
In addition, in present embodiment, High Frequency Current Sensor 1 further includes two sliding blocks 16 being arranged in pairs, and sliding block 16 divides
It is not sheathed on the first semicircular ring box body 111 and the second semicircular ring box body 112, and there are two being correspondingly arranged on each sliding block 16
Elastic element 17, elastic element 17 are respectively correspondingly arranged between each sliding block 16 and semicircular ring box body corresponding with the sliding block.
In addition, being fixed with sliding block fixing mechanism respectively on the first semicircular ring box body 111 and the second semicircular ring box body 112
18, wherein each sliding block fixing mechanism 18 includes：Two fixed plates 181 being arranged in pairs, fixed plate 181 with it is corresponding
The first semicircular ring box body 111 or the second semicircular ring box body 112 be fixedly connected by mounting hole 121, two fixed plates 181 it is interior
Wall forms the sliding rail 182 slided for sliding block 16 (sliding rail 182 may refer to Fig. 4).
Fig. 2 is the High Frequency Current Sensor of the present invention for cable local discharge detection under a kind of embodiment
Entirety sectional view.
As shown in Fig. 2, simultaneously combining Fig. 1 if necessary, the High Frequency Current Sensor 1 in present embodiment further includes two and half
The magnetic core 13 of circular ring shape, magnetic core 13 is respectively arranged in the first semicircular ring box body 111 and the second semicircular ring box body 112, to be set to circle
In the cavity of annular；Wire coil (not shown), connector 15 and gold are wound on the magnetic core 13 of first semicircular ring box body 111
Belong to coil connection.In the present embodiment, connector 15 is BNC connector.The outer of metal case 11 is can be seen that in conjunction with Fig. 2 and Fig. 1
It encloses surface and is equipped with U-shaped groove 151, connector 15 is set in U-shaped groove 151.
In addition, in present embodiment, insulating washer is additionally provided between metal case 11 and magnetic core 13, insulating washer is used for
Magnetic core 13 and metal case 11 is isolated, magnetic core 13 is avoided to be in direct contact with metal case 11.
Fig. 3 shows the High Frequency Current Sensor of the present invention for cable local discharge detection in a kind of embodiment party
The structure of sliding block under formula.
From figure 3, it can be seen that sliding block 16 has proximal face I and distal end end face II, in order to clamp testee, proximal end end
Face I is the arc surface of indent, to be bonded testee surface.In order to enable sliding block 16 in sliding process with metal case 11
Surface is bonded, and the diameter of proximal face I could be provided as identical as the internal diameter of metal case 11 so that proximal face I is being slided
When to metal case 11, it can be bonded with 11 surface of metal case, and distal end end face II is also configured as arc surface, distal end end face II
Arc surface diameter could be provided as it is identical as the outer diameter of metal case 11 so that distal end end face II is sliding into metal case
When 11 surface, it can be bonded with the surface of metal case 11.
In conjunction with Fig. 1 to Fig. 3 can be seen that the proximal face II of sliding block 16 madial wall IV and semicircular ring box body it is outer
The Blind locating holes 19 for accommodating and 17 end of positioning elastic element are offered on side wall III.
It is sheathed on the first semicircular ring box body 111 or the second semicircular ring box body 112 for the ease of sliding block 16, the width of sliding block 16
Degree 162 is more than the radial width of metal case 11, is slided along the diametric(al) of metal case 11 with being easy to sliding block 16.
Fig. 4 shows the High Frequency Current Sensor of the present invention for cable local discharge detection in a kind of embodiment party
The structure of sliding block fixing mechanism under formula.
As shown in figure 4, sliding block fixing mechanism 18 is slided for fixing sliding block 16 along sliding rail 182, and can not be in other directions
Upper movement.Fixed mechanism 18 is slided to fix by 1 existing mounting hole 121 of High Frequency Current Sensor, it is new without opening up again
Hole.
Fig. 5 shows the High Frequency Current Sensor of the present invention for cable local discharge detection in a kind of embodiment party
The structure of elastic element under formula.
As shown in figure 5, in the present embodiment, elastic element 17 is spring.
Fig. 6 shows the High Frequency Current Sensor of the present invention for cable local discharge detection in a kind of embodiment party
The connection structure between sliding block and elastic element, sliding block fixing mechanism under formula
In conjunction with Fig. 2, Fig. 3, Fig. 4 and Fig. 6 can be seen that each sliding block 16 and semicircular ring box body corresponding with the sliding block it
Between be equipped with two springs, clamp testee to ensure to provide enough elastic forces, meanwhile, the structure using two springs has
Stablize conducive to the internal structure of High Frequency Current Sensor 1 is made.
It should be noted that in the present embodiment, sliding block 16 and sliding block fixing mechanism 18 use insulating materials.
The operation principle of High Frequency Current Sensor 1 is described further in conjunction with Fig. 1 to Fig. 6：
When work, lock 113 is opened so that lock 113 is in unlock station, the first semicircular ring box body 111 and the second half
Annulus box body 111 opposite can be opened, by the first semicircular ring box body 111 and the second semicircular ring box body 112 of High Frequency Current Sensor 1
It clamps and needs the testee such as cable body that measures, i.e., testee is placed in the first semicircular ring box body 111 and the second half
The circle ring center position of annulus box body 112, conducting electric current keep the electric current of testee logical from the center of High Frequency Current Sensor 1
It crosses, is closed lock 113, the shelf depreciation that testee can be carried out by 15 external test equipment of connector is tested.
During testee is clamped by the first semicircular ring box body 111 and the second semicircular ring box body 112, due to quilt
The proximal face I that object contacts two sliding blocks 16 is surveyed, i.e., testee has strutted two sliding blocks 16, at this point, sliding block 16 is in external force
Under effect, the diametric(al) along the metal case 11 of circular ring shape slides simultaneously compression elastic element 17 opposite to each other, so that two sliding blocks 16
The distance between proximal face I become larger so that testee can be positioned in the metal case 11 of circular ring shape；Work as quilt
It surveys object and no longer struts two sliding blocks 16, i.e., when external force is removed, two sliding blocks 16 are under the action of the elastic force of elastic element 17
Relative motion so that the distance between proximal face I of two sliding blocks 16 reduce so that metal case 11 be clamped in it is tested
On object.Pass through above-mentioned mechanism so that High Frequency Current Sensor 1 is fixed on testee, without along testee with
Meaning movement, to achieve the purpose that High Frequency Current Sensor 1 is fixed on testee.
By aforesaid operations, High Frequency Current Sensor 1 can be used for different voltages grade, the cable of different dimensions exists
Test when partial discharge is tested, fundamentally solves since sensor internal diameter size difference causes sensor to be difficult to general and makes
The problem that used time sensor inconvenience is fixed so that High Frequency Current Sensor 1 can be widely used in the cable of various specifications.
Further, since High Frequency Current Sensor 1 is simple in structure, it is therefore easy to fixation is operated, and it is fixed.
It should be noted that prior art part is not limited to given by present specification in protection scope of the present invention
Embodiment, all prior arts not contradicted with the solution of the present invention, including but not limited to first patent document, formerly
Public publication, formerly openly use etc., it can all be included in protection scope of the present invention.
In addition, combination recorded in the combination of each technical characteristic and unlimited this case claim in this case or
It is the combination recorded in specific embodiment, all technical characteristics that this case is recorded can be freely combined in any way
Or combine, unless generating contradiction between each other.
It is also to be noted that embodiment enumerated above is only specific embodiments of the present invention.The obvious present invention is not
It is confined to above example, the similar variation or deformation made therewith are that those skilled in the art can be from present disclosure
It immediately arrives at or is easy to just to associate, be within the scope of protection of the invention.
Claims (10)
1. a kind of High Frequency Current Sensor for cable local discharge detection comprising：
The metal case of circular ring shape, in the cavity with circular ring shape, the metal case includes the first half to be stitched together
One end of annulus box body and the second semicircular ring box body, the first semicircular ring box body and the second semicircular ring box body is rotatably connected,
Between the first semicircular ring box body and the other end of the second semicircular ring box body be equipped with lock, it is described lock have locking station and
Station is unlocked, in the unlock station, the first semicircular ring box body and the second semicircular ring box body opposite can be opened；
The magnetic core of two semi-circular shape is respectively arranged in the first semicircular ring box body and the second semicircular ring box body, to be set to
In the cavity of the circular ring shape；It is wound with wire coil on one of magnetic core of described two semi-circular shape；
Insulating washer is set between metal case and magnetic core；
Connector is connect with the wire coil；
It is characterized in that, the High Frequency Current Sensor further includes：
Two sliding blocks being arranged in pairs, are sheathed on respectively on the first semicircular ring box body and the second semicircular ring box body；
At least two elastic elements are respectively correspondingly arranged between each sliding block and semicircular ring box body corresponding with the sliding block；
Wherein, two sliding blocks can under external force, and the diametric(al) along the metal case of the circular ring shape is slided simultaneously opposite to each other
The elastic element is compressed, so that the distance between the proximal face of two sliding blocks becomes larger；When external force is removed, two sliding blocks exist
Relative motion under the action of the elastic force of elastic element, so that the distance between proximal face of two sliding blocks reduces, so that golden
Belong to box body to be clamped on testee.
2. High Frequency Current Sensor as described in claim 1, which is characterized in that the proximal face of the sliding block is the circle of indent
Cambered surface.
3. High Frequency Current Sensor as described in claim 1, which is characterized in that the first semicircular ring box body and the second semicircle
Sliding block fixing mechanism is fixed on ring box body respectively, wherein each sliding block fixing mechanism includes：Two be arranged in pairs
Fixed plate, the fixed plate are fixedly connected with the first corresponding semicircular ring box body or the second semicircular ring box body, two fixations
The inner wall of plate forms the sliding rail slided for sliding block.
4. High Frequency Current Sensor as described in claim 1, which is characterized in that the elastic element includes spring.
5. High Frequency Current Sensor as claimed in claim 4, which is characterized in that each sliding block and corresponding with the sliding block half
At least two springs are equipped between annulus box body.
6. High Frequency Current Sensor as claimed in claim 4, which is characterized in that the madial wall of the proximal face of the sliding block with
And it is offered on the lateral wall of semicircular ring box body for the accommodating Blind locating holes with retaining spring end.
7. High Frequency Current Sensor as claimed in claim 2, which is characterized in that the lock is set to inside metal case.
8. High Frequency Current Sensor as described in claim 1, which is characterized in that the peripheral surface of the metal case is equipped with U
Type groove, the connector are set in the U-shaped groove.
9. High Frequency Current Sensor as described in claim 1, which is characterized in that the connector is BNC connector.
10. High Frequency Current Sensor as described in claim 1, which is characterized in that the metal case include box body ontology and
The lid being detachably connected with box body ontology.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810240938.9A CN108508253A (en) | 2018-03-22 | 2018-03-22 | A kind of High Frequency Current Sensor for cable local discharge detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810240938.9A CN108508253A (en) | 2018-03-22 | 2018-03-22 | A kind of High Frequency Current Sensor for cable local discharge detection |
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| CN108508253A true CN108508253A (en) | 2018-09-07 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810240938.9A Pending CN108508253A (en) | 2018-03-22 | 2018-03-22 | A kind of High Frequency Current Sensor for cable local discharge detection |
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| CN113138303A (en) * | 2021-03-15 | 2021-07-20 | 江苏大学 | Easy-to-install current sensor adopting magnetoelectric composite material |
| CN113791302A (en) * | 2021-08-05 | 2021-12-14 | 深圳供电局有限公司 | Sensor for partial discharge and synchronous positioning |
| WO2022047601A1 (en) * | 2020-09-01 | 2022-03-10 | 杭州巨骐信息科技股份有限公司 | System for monitoring circulating current of high-voltage cable metal sheath |
| CN117074727A (en) * | 2023-10-13 | 2023-11-17 | 山东鲁南大数据产业发展有限公司 | Non-contact current detection device of building fire-fighting equipment |
| CN118280697A (en) * | 2024-05-24 | 2024-07-02 | 国网江西省电力有限公司供电服务管理中心 | Broadband standard current transformer equipment |
| WO2024200760A1 (en) * | 2023-03-31 | 2024-10-03 | Otto-Von-Guericke-Universität Magdeburg | Partial-discharge sensor, method for controlling a gap of a magnet core, and control device |
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Application publication date: 20180907 |