CN205643479U - Current mutual inductor - Google Patents
Current mutual inductor Download PDFInfo
- Publication number
- CN205643479U CN205643479U CN201620366074.1U CN201620366074U CN205643479U CN 205643479 U CN205643479 U CN 205643479U CN 201620366074 U CN201620366074 U CN 201620366074U CN 205643479 U CN205643479 U CN 205643479U
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- Prior art keywords
- current transformer
- sensor
- casing
- end shield
- inductor
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Abstract
The utility model relates to a current mutual inductor, include: the mutual -inductor main part, oil tank locates mutual -inductor main part one end, the plastic width -lock type single -layer sealed packing case comprises a casin, the box connect in oil tank keeps away from the one end of mutual -inductor main part, the sensor, the sensor is located in the box, be used for detecting current mutual inductor's partial discharge, capacitance and dielectric loss. Above -mentioned current mutual inductor is equipped with the box and mutual -inductor main part integration setting of sensor, partly as this current mutual inductor in whole, and the sensor provides the hardware condition to the partial discharge of mutual -inductor, capacitance and dielectric loss's live test to play the effect that can conveniently detect partial discharge, capacitance and dielectric loss at electrified in -process, make the live test convenience of mutual -inductor, safe and accuracy, need not the external sensing instrument of deenergization.
Description
Technical field
This utility model relates to High-Voltage Electrical Appliances field, particularly a kind of current transformer.
Background technology
Current transformer makes the secondary device such as measuring instruments, relay protection in power system obtain primary circuit electricity
The sensor of stream information, makes electrical equipment important in power system, carries between high and low pressure system
The function that isolation and high pressure amount are changed to low pressure amount.Current transformer itself whether working properly, to electric power
The safety of system and the normal work of the equipment such as protection, measurement have extremely important meaning.
And current, generally by installing external sensing device outside transformer additional to detect when power is off, but
Use the method, exist installation inconvenience, structure be difficult to the shortcomings such as supporting, jitter, it is difficult to electric current
The parameters such as the capacitance of transformer carry out live testing.
Utility model content
Based on this, it is necessary to carry out asking of live testing for parameters such as being difficult to the capacitance to current transformer
Topic, it is provided that a kind of current transformer that can easily the parameters such as the capacitance of current transformer be carried out live testing.
A kind of current transformer, including:
Current transformer body；
Oil Tank, is located at described current transformer body one end；
Casing, described casing is connected to described Oil Tank one end away from described current transformer body；And
Sensor, described sensor is located in described casing, puts for detecting the local of described current transformer
Electricity, capacitance and dielectric loss.
Above-mentioned current transformer, is provided with casing and the current transformer body integrated setting of sensor, as this electricity
A part in current transformer entirety, sensor provides the shelf depreciation to transformer, capacitance and medium
The hardware condition of the live testing of loss, thus play and convenient in charge process can detect shelf depreciation, electricity
Capacity and the effect of dielectric loss, make the live testing of transformer conveniently, safely and accurately, it is not necessary to disconnect electricity
The external sensor apparatus in source.
Wherein in an embodiment, described current transformer includes that end shield, described end shield are located at described casing
In and be positioned at described casing near described Oil Tank one end, the input of described sensor and described end shield communication link
Connect.
Wherein in an embodiment, in described casing, it is additionally provided with end shield seat, described end shield and described sensor
All it is located on described end shield seat.
Wherein in an embodiment, described sensor can pass through impedance earth, and described end shield can be by described
Sensor ground.
Wherein in an embodiment, described sensor is provided with signal output terminal, is used for connecting detecting instrument
To export the signal of described sensor.
Wherein in an embodiment, be additionally provided with in described casing from described casing away from described Oil Tank one end
The terminal support extended to described Oil Tank, to support described signal output terminal.
Wherein in an embodiment, described signal output terminal is located at described cabinet wall, and described terminal props up
Frame extends along described cabinet wall.
Wherein in an embodiment, described current transformer also includes charged oil taking apparatus, described charged takes
Oil device includes that oil pipe, described oil pipe extend to described box bottom from described Oil Tank.
Wherein in an embodiment, described casing side is provided with switching door, described switching door and described casing
It is tightly connected by sealing ring.
Wherein in an embodiment, described current transformer also includes bumper, and described bumper is rotatable
Be located on described switching door.
Accompanying drawing explanation
Fig. 1 is the front view of the current transformer of an embodiment；
Fig. 2 is the side view of the current transformer shown in Fig. 1；
Fig. 3 is partial enlarged drawing at the A of the current transformer shown in Fig. 1；
Fig. 4 is the scheme of installation of the current transformer shown in Fig. 1.
Detailed description of the invention
For the ease of understanding this utility model, below with reference to relevant drawings, this utility model is carried out more comprehensively
Description.Accompanying drawing gives preferred embodiment of the present utility model.But, this utility model can be with
Many different forms realize, however it is not limited to embodiment described herein.On the contrary, provide these real
The purpose executing example is to make the understanding to disclosure of the present utility model more thorough comprehensively.
It should be noted that when element is referred to as " being fixed on " another element, and it can be directly at another
On individual element or element placed in the middle can also be there is.When an element is considered as " connection " another yuan
Part, it can be directly to another element or may be simultaneously present centering elements.Used herein
Term " vertical ", " level ", "left", "right" and similar statement simply to illustrate that mesh
's.
Unless otherwise defined, all of technology used herein and scientific terminology with belong to of the present utility model
The implication that those skilled in the art are generally understood that is identical.Institute in description of the present utility model herein
The term used is intended merely to describe the purpose of specific embodiment, it is not intended that in limiting this utility model.
Term as used herein " and/or " include the arbitrary and all of one or more relevant Listed Items
Combination.
As shown in Figures 1 and 2, a kind of current transformer 100 of this preferred embodiment, including current transformer body
10, Oil Tank 20, casing 30 and sensor 40.
Wherein, Oil Tank 20 is located at current transformer body 10 one end, is used for holding insulating oil, with insulated mutual inductor
Main body 10.Casing 30 is connected to Oil Tank 20 one end away from current transformer body 10.Case is located at by sensor 40
In body 30, for detecting the shelf depreciation of current transformer 100, capacitance and dielectric loss.
Above-mentioned current transformer 100, is provided with that the casing 30 of sensor 40 is integrated with current transformer body 10 to be set
Putting, as the part in this current transformer 100 entirety, sensor 40 provides the local to transformer
Electric discharge, the hardware condition of live testing of capacitance and dielectric loss, thus play can in charge process side
Just detect the effect of shelf depreciation, capacitance and dielectric loss, make the live testing convenience of transformer, safety
And accurately, it is not necessary to the external sensor apparatus of deenergization.
Continuing referring to Fig. 1 and Fig. 2, current transformer 100 includes end shield 70, and this end shield 70 is located at casing
In 30 and be positioned at casing 30 near Oil Tank 20 one end.The input of sensor 40 and the extraction of this end shield 70
End communication connection, to carry out live testing to end shield 70.
The insulating barrier of the primary connection of current transformer 100 is rolled by insulating paper from level to level and forms, every layer of insulation
The tinfoil paper layer arranged between paper is referred to as capacitance plate.Capacitance plate in current transformer 100 can be effectively improved internal electricity
Field distribution, improves the effect of insulant utilization rate, and capacitance plate number is the most, and in insulation, Electric Field Distribution is the most equal
Even.Wherein, first screen near high-pressure conductive part is zero screen, and outermost one layer screen is then referred to as end shield.Logical
Cross end shield 70 and can measure the capacitance of its capacitance plate, dielectric loss and shelf depreciation, thus judge capacitance plate
Insulation status, grasp insulating properties, effectively and in time find end shield 70 humidified insulation, insulating oil deterioration,
Internal flaw and the hidden danger such as open circuit or short circuit between capacitance plate.Therefore, sensor 40 is integrated with measurement end shield 70
The function of shelf depreciation, capacitance and dielectric loss, thus reduce the cost of overhaul largely.
Specifically, sensor 40 is provided with signal output terminal 42, is used for connecting detecting instrument with output transducer
40 signals.
So, the input of sensor 40 obtains signal from end shield 70, during live testing, by detecting instrument
It is connected to signal output terminal 42, thus would know that capacitance, medium that sensor 40 obtains from end shield 70
Loss and shelf depreciation parameter.
Being additionally provided with the end shield seat 32 being welded on casing in casing 30, end shield 70 is fastened by bolts in end shield
On seat 32, sensor 40 is threadeded with end shield 70.
As it is shown on figure 3, specifically, the shell of end shield 70 is provided with public swivel nut 322 near one end of sensor 40,
One end that this public affairs swivel nut 322 connects sensor 40 is provided with external screw thread, and the shell of sensor 40 is provided with female swivel nut
44, this mother's swivel nut 44 is provided with the female thread mated with male swivel nut 322.So, sensor 40 is by affixed
Female swivel nut 44 on shell screws on the male swivel nut 322 on the shell of end shield 70, it is achieved be reliably connected.
The shell of end shield 70 is provided with flange 324 near end shield seat 32 one end, this flange 324 has and is easy to bolt and wears
The through hole crossed is to be arranged on end shield seat 32 by bolt.So, end shield 70 one end is pacified by flange 324
Being contained on end shield seat 32, the other end is by the male swivel nut 322 on its shell and the sensing being provided with female swivel nut 44
Device 40 spins together, thus realizes sensor 40 and dismantle easily and install.
End shield 70 is internal is provided with the first connection post 72 stretching out shell, and internal being provided with of sensor 40 can be vertically
The second flexible connection post 46.Male swivel nut 322 screws with female swivel nut 44 after being connected, first connect post 72 with
Second connects post 46 mutually abuts and connects, thus realizes signal transmission.In the present embodiment, second connects
Post 46 realizes flexible by being enclosed within its outside spring 462.So, sensor 40 leads to end shield 70
Cross the two with male swivel nut 322 and female swivel nut 44 screw compression and make the first connection post 72 be connected with second
Post 46 realizes its signal and connects, to detect the shelf depreciation of end shield 70, capacitance and dielectric loss.
Further, the second connection post 46 due to sensor 40 passes through the shell phase of impedance and sensor 40
Connect, and this shell passes sequentially through female swivel nut 44, male swivel nut 322 and is connected with end shield 70 and end shield seat 32, institute
With at any time, sensor 40 is all in ground state；When carrying out live testing, sensor 40 connects
Detecting instrument.Due to detecting instrument ground connection, therefore sensor 40 is in ground state all the time, thus outside suppression
Disturb, improve operational reliability.
And owing to the situation of imperfect earth once occurs in end shield 70, end shield 70 can be caused to form electric capacity over the ground,
Cause being formed between end shield 70 and ground suspended voltage, cause end shield 70 to discharge over the ground, to the peace of staff
Complete and electrical network reliability service brings threat.Therefore, in the present embodiment, the end shield 70 of electric capacity is by sensing
Device 40 ground connection ensures transformer safe operation.
As shown in Figure 4, further, casing 30 is positioned at the bottom of whole current transformer 100.Due to
End shield 70 is arranged on bottom Oil Tank 20, and therefore the position at the charged position of its distance current transformer 100 is relatively
Far, and overhead close together, thus while ensureing test safety, for the operation band of operator
Carry out great convenience.In the present embodiment, current transformer 100 is arranged in mounting bracket, end shield 70 with
The distance on ground is 2.5m.
Please continue to refer to Fig. 1 and Fig. 2, being additionally provided with terminal support 34 in casing 30, terminal support 34 is from case
The bottom of body 30 extends to Oil Tank 20, to support signal output terminal 42.In the present embodiment, terminal props up
Frame 34 is two, and signal output terminal 42 is positioned at the centre of two terminal supports 34.
Current transformer 100 also includes charged oil taking apparatus (figure is not marked).Charged oil taking apparatus includes oil pipe 50,
Oil pipe 50 extends to bottom casing 30 from Oil Tank 20, and one end that oil pipe 50 is positioned at bottom casing 30 is provided with valve
Body 52, thus can periodically open oil pipe 50 and gather oil sample and be analyzed or Oil Tank 20 is carried out repairing.Due to
Oil pipe 50 extends to bottom casing 30, therefore makes to take oil more convenient to operate.In the present embodiment, electric current
Transformer 100 is arranged in mounting bracket, and oil pipe 50 is positioned at one end distance ground 1.5m bottom casing 30,
Thus facilitate operator's to take oil operation (as shown in Figure 3).
Casing 30 side is provided with switching door 36, and switching door 36 is tightly connected by sealing ring with casing 30, reaches
To good sealing effectiveness, sensor 40 is sealed in casing, it is simple to individually carry out live testing operation.
In the present embodiment, switching door 36 is unscrewing type.
Current transformer 100 also includes bumper 60, and these bumper 60 two ends are rotatably arranged in switching door
On 36, and the angle of relative switching door 36 is 0 °～90 °.When this current transformer 100 runs, protect
Danger thick stick 60 outwardly, and with switching door 36 in 90 ° of angles, to stop that staff connects with miscellaneous equipment
Touch charged position, add the safety of this current transformer 100.
Above-mentioned current transformer 100, can be by entering with the sensor 40 of current transformer 100 integrated setting
The hand-manipulating of needle live detection to capacitance, dielectric loss and shelf depreciation, makes live testing convenient and safe, and tool
There is higher accuracy.Sensor 40 is enclosed in casing 30, has good interference free performance, it is simple to
Individually carry out live testing operation.End shield 70 is provided with guarantor away from charged position, the switching door 36 of casing 30
Danger thick stick 60, it is achieved that the live testing of safety.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the most right
The all possible combination of each technical characteristic in above-described embodiment is all described, but, if these skills
There is not contradiction in the combination of art feature, is all considered to be the scope that this specification is recorded.
Embodiment described above only have expressed several embodiments of the present utility model, its describe more concrete and
In detail, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that, it is right
For those of ordinary skill in the art, without departing from the concept of the premise utility, it is also possible to do
Going out some deformation and improvement, these broadly fall into protection domain of the present utility model.Therefore, this utility model is special
The protection domain of profit should be as the criterion with claims.
Claims (10)
1. a current transformer, it is characterised in that including:
Current transformer body；
Oil Tank, is located at described current transformer body one end；
Casing, described casing is connected to described Oil Tank one end away from described current transformer body；And
Sensor, described sensor is located in described casing, puts for detecting the local of described current transformer
Electricity, capacitance and dielectric loss.
Current transformer the most according to claim 1, it is characterised in that described current transformer includes
End shield, described end shield is located in described casing and is positioned at described casing near described Oil Tank one end, described sensing
The input of device communicates to connect with described end shield.
Current transformer the most according to claim 2, it is characterised in that be additionally provided with end in described casing
Screen seat, described end shield and described sensor are all located on described end shield seat.
Current transformer the most according to claim 2, it is characterised in that described sensor can be by resistance
Anti-ground connection, described end shield can pass through described sensor ground.
Current transformer the most according to claim 1, it is characterised in that described sensor is provided with signal
Lead-out terminal, for connecting detecting instrument to export the signal of described sensor.
Current transformer the most according to claim 5, it is characterised in that be additionally provided with in described casing certainly
The terminal support extended to described Oil Tank away from described Oil Tank one end of described casing, defeated to support described signal
Go out terminal.
Current transformer the most according to claim 6, it is characterised in that described signal output terminal sets
In described cabinet wall, described terminal support extends along described cabinet wall.
Current transformer the most according to claim 1, it is characterised in that described current transformer also wraps
Including charged oil taking apparatus, described charged oil taking apparatus includes that oil pipe, described oil pipe extend to institute from described Oil Tank
Described box bottom.
Current transformer the most according to claim 1, it is characterised in that described casing side is provided with out
Closing door, described switching door is tightly connected by sealing ring with described casing.
Current transformer the most according to claim 9, it is characterised in that described current transformer is also
Including bumper, described bumper is rotatably arranged on described switching door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620366074.1U CN205643479U (en) | 2016-04-26 | 2016-04-26 | Current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620366074.1U CN205643479U (en) | 2016-04-26 | 2016-04-26 | Current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205643479U true CN205643479U (en) | 2016-10-12 |
Family
ID=57061504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620366074.1U Active CN205643479U (en) | 2016-04-26 | 2016-04-26 | Current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205643479U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938155A (en) * | 2016-04-26 | 2016-09-14 | 广州供电局有限公司 | Current transformer |
-
2016
- 2016-04-26 CN CN201620366074.1U patent/CN205643479U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938155A (en) * | 2016-04-26 | 2016-09-14 | 广州供电局有限公司 | Current transformer |
| CN105938155B (en) * | 2016-04-26 | 2019-03-22 | 广州供电局有限公司 | Current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190621 Address after: 510620 No. 2 Tianhe two road, Tianhe District, Guangzhou, Guangdong Patentee after: Guangzhou Power Supply Bureau Address before: 510620 No. 2 Tianhe two road, Tianhe District, Guangzhou, Guangdong Co-patentee before: Hunan Electric Porcelain Electrical Appliance Co. Ltd. Patentee before: Guangzhou Power Supply Bureau |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200929 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. |
|
| TR01 | Transfer of patent right |