CN108831682A - A kind of high voltage protection capacitance type potential transformer - Google Patents
A kind of high voltage protection capacitance type potential transformer Download PDFInfo
- Publication number
- CN108831682A CN108831682A CN201810793492.2A CN201810793492A CN108831682A CN 108831682 A CN108831682 A CN 108831682A CN 201810793492 A CN201810793492 A CN 201810793492A CN 108831682 A CN108831682 A CN 108831682A
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- China
- Prior art keywords
- voltage
- capacitance
- awl
- low
- mutual inductor
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- 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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- 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
- H01F27/02—Casings
- H01F27/022—Encapsulation
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- 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
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- 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
- H01F38/24—Voltage transformers
- H01F38/26—Constructions
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Thermistors And Varistors (AREA)
Abstract
The invention discloses a kind of high voltage protection capacitance type potential transformers, including insulation inner cone, mutual inductor awl, connecting wire, conducting rod, bolt and calutron, the embedded bottom that insulation inner cone is set of mutual inductor awl, 2 high-voltage capacitance series connection in mutual inductor awl, when guaranteeing that high-pressure section is breakdown, high pressure will not be passed to low-pressure side, and since the total capacity of high-voltage capacitance becomes smaller, the voltage of low-pressure side can be caused to increase, so as to cause the alarm of controller, the equipment for reminding staff to replace damage as early as possible；Low-voltage side outlet of the connecting wire from high-voltage capacitance, connecting wire forms plant-grid connection point in mutual inductor awl bottom, the external low-voltage capacitance being arranged in inside calutron of plant-grid connection point, while realizing electromagnetic isolation, to solve the safety problem in EVT application very well.
Description
Technical field
The invention belongs to voltage transformer technical field more particularly to a kind of high voltage protection capacitance type potential transformers.
Background technique
With the popularization of distribution automation equipment, Nanning barrier has increased a large amount of automation complete set of equipments, existing distribution newly
Automation ring network cabinet is to improve measurement accuracy in the case where reducing volume, has largely been all made of the acquisition of electronic voltage mutual induction device
Line voltage distribution numerical value, abbreviation EVT.Capacitance-voltage-distributing type EVT or electric resistance partial pressure type EVT all suffers from an intractable safety problem,
I.e. when insulation breakdown occurs in the high-pressure section of EVT or sectional pressure element damages, how to guarantee that high pressure is not transferred to low pressure
Side causes the damage of control equipment even to cause human safety issues.Traditional way is all to increase isolation transformation in low-pressure side
Device, but since the general pressure voltage of the isolating transformer of current low pressure all only has between 900~4000V, so can not be real
The carry out effective protection to secondary device.
Summary of the invention
The present invention in view of the above shortcomings of the prior art, using high voltage protection measure, is connected, then outer with two panels high-voltage capacitance
Low-voltage capacitance is connect, solves the safety problem in EVT application very well.Using following specific technical solution：
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of high voltage protection capacitance type potential transformer, including insulation inner cone, mutual inductor awl, connecting wire, conducting rod,
Bolt and calutron, cone top part is provided with high pressure stem in the insulation, and insulation inner cone bottom is provided with bolt, bolt and electricity
Magnetic device is detachably connected；The embedded bottom that insulation inner cone is set of mutual inductor awl；The mutual inductor awl includes high pressure
Capacitor, the conducting rod both ends are contacted with the high pressure stem of high-voltage capacitance and the inner cone that insulate respectively；The high-voltage capacitance quantity
It is 2,2 high-voltage capacitance series connection, connecting wire forms 1 power supply in mutual inductance awl bottom and connect from high-voltage capacitance low-voltage side outlet
Access point, plant-grid connection point and calutron are electrically connected.
2 high-voltage capacitance series connection in mutual inductor awl, when guaranteeing that high-pressure section is breakdown, high pressure will not be passed to low pressure
Side, and since the total capacity of high-voltage capacitance becomes smaller, can cause the voltage of low-pressure side to increase, so as to cause the alarm of controller,
The equipment for reminding staff to replace damage as early as possible, to solve the safety problem in EVT application very well.
Further, the high-voltage capacitance is Ceramic high-pressure capacitor, and resistance to voltage levels are high, and resistance to voltage levels are 45KV.
Further, the calutron is internally provided with low-voltage capacitance, and low-voltage capacitance and high-voltage capacitance pass through mutual
The plant-grid connection point series connection that sensor awl bottom is formed；2 high-voltage capacitances of mutual inductor awl by connecting wire and it is external
The low-voltage capacitance of calutron is connected, and realizes electromagnetic isolation.
Further, the low-voltage capacitance both ends connect coil, the secondary independent grounding of low-voltage capacitance, it is ensured that staff
Personal safety.
Further, mutual inductor awl further includes epoxy resin, epoxy inner encapsulate high-voltage capacitance, conducting rod and
Conducting wire, the connecting wire is from the low-voltage side outlet of high-voltage capacitance, and connecting wire is in epoxy resin bottom formation plant-grid connection
Point.Capacitor, conducting rod and conducting wire are packaged by using the epoxy resin of insulation, safety with higher.
Further, the epoxy resin is conical, realizes that the plug type between insulation inner cone connects, convenient
Installation and removal；It is not necessary that mutual inductor to be installed to inside SF6 gas tank, in addition shelf depreciation is small, it is highly suitable for the ring of mesolow
The equipment such as net cabinet, switchgear.
Further, further include inserts, the bottom surface of epoxy resin is provided with inserts, mutual inductor awl is facilitated to remove.
It further, further include sealing sheath, the outside of the epoxy resin and the inside of insulation inner cone are closely arranged
There is sealing sheath, i.e., has wrapped up sealing sheath on the outside of epoxy resin；Mutual inductor awl is squeezed into insulation inner cone when installation, is allowed
Insulated enclosure sheath is tightly wrapped on mutual inductor awl, has almost prevented the possibility of creeping discharge so that shelf depreciation very
It is small.
Further, the sealing sheath is silicon rubber insulation sealing sheath, good airproof performance.
The advantage of the invention is that：
1, it using high voltage protection measure, is connected using the higfh-tension ceramics capacitor of two panels high voltage level, guarantees that high-pressure section is hit
When wearing, high pressure will not be passed to low-pressure side, and since the total capacity of high-voltage capacitance becomes smaller, can cause the voltage liter of low-pressure side
Height, so as to cause the alarm of controller, the equipment for reminding staff to replace damage as early as possible, to solve EVT application very well
In safety problem；
2, high-voltage capacitance and external low-voltage capacitance, liftoff current potential is remote, and partial discharge is small, realizes electromagnetic isolation, while low-voltage capacitance is secondary
Independent grounding, it is ensured that the personal safety of staff；
3, epoxy resin is encapsulated in capacitor interior, highly-safe；Epoxy resin is conical, realizes in mutual inductor awl and insulation
Plug type connection between cone, it is not necessary that mutual inductor to be installed to inside SF6 gas tank, in addition shelf depreciation is small, is highly suitable for
The equipment such as ring network cabinet, the switchgear of mesolow.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of high voltage protection capacitance type potential transformer of the invention；
Fig. 2 is the right view of the insulation inner cone and mutual inductor awl of a kind of high voltage protection capacitance type potential transformer of the invention；
Fig. 3 is a kind of schematic diagram of high voltage protection capacitance type potential transformer of the invention.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in detail：
In the description of the present invention, it should be noted that the orientation or positional relationship of the instructions such as " on top ", " bottom surface " is base
In orientation or positional relationship shown in the drawings or the invention product using when the orientation or positional relationship usually put, only
It is that for the convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must have specifically
Orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
A kind of high voltage protection capacitance type potential transformer as depicted in figs. 1 and 2, including insulation inner cone 1, mutual inductor awl
2, connecting wire 3, conducting rod 4, bolt 5, inserts 6, sealing sheath 7, push rod spring 8, high pressure stem 9, calutron 10 and low pressure
Capacitor 11.
High pressure stem 9 is provided at the top of insulation inner cone 1, insulation 1 bottom of inner cone is provided with bolt 5, for connecting with calutron
It connects；The embedded bottom that insulation inner cone 1 is arranged in of mutual inductor awl 2, mutual inductor awl 2 include 2 concatenated Ceramic high-pressure capacitors
21 and epoxy resin 22, the resistance to voltage levels of Ceramic high-pressure capacitor 21 are 45KV, 22 enclosed inside of epoxy resin Ceramic high-pressure electricity
Hold 21, conducting rod 4 and connecting wire 3, high pressure stem 9 of 4 both ends of conducting rod respectively with Ceramic high-pressure capacitor 21 and the inner cone that insulate connects
Touching；8 both ends of push rod spring are separately positioned in the high pressure stem 9 at 1 top of conducting rod 4 and insulation inner cone, therefore conducting rod 4 has one
Fixed activity, it is convenient to be connect with other components.
The connecting wire 3 is from the low-voltage side outlet of Ceramic high-pressure capacitor 21, and connecting wire 3 is in 22 bottom of epoxy resin
Form 1 plant-grid connection point；Epoxy resin 22 is conical, realizes that mutual inductor awl 2 and the plug-in type for the inner cone 1 that insulate are connect,
The bottom surface of epoxy resin 22 is provided with inserts 6, mutual inductor awl 2 is facilitated to remove, the outside of epoxy resin 22 and insulation inner cone 1
Inside be closely provided with sealing sheath 7, i.e., sealing sheath 7 has been wrapped up on the outside of epoxy resin 22, by mutual inductor awl 2 when installation
It squeezes into insulation inner cone 1, sealing sheath 7 is allowed tightly to be wrapped on mutual inductor awl 2, sealing sheath 7 uses silicon rubber insulation
Sealing sheath.
Calutron 10 is internally provided with 1 low-voltage capacitance 11, and low-voltage capacitance 11 is with higfh-tension ceramics capacitor 21 by mutual
The plant-grid connection point series connection that 2 bottom of sensor awl is formed, 11 both ends of low-voltage capacitance connect coil, and the resistance to voltage levels of coil are 6000V,
11 2 independent groundings of low-voltage capacitance.
Such as a kind of high voltage protection capacitance type potential transformer of Fig. 3, dotted portion is to be wrapped in epoxy resin 22 together
2 concatenated Ceramic high-pressure capacitors 21, and the external low-voltage capacitance 11 being arranged in calutron 10, therefore liftoff point
Far；11 both ends of low-voltage capacitance connect coil, the secondary independent grounding of low-voltage capacitance.
Claims (9)
1. a kind of high voltage protection capacitance type potential transformer, including insulation inner cone, mutual inductor awl, connecting wire, conducting rod, spiral shell
Bolt and calutron, cone top part is provided with high pressure stem in the insulation, and insulation inner cone bottom is provided with bolt, bolt and electromagnetism
Device is detachably connected；The embedded bottom that insulation inner cone is set of mutual inductor awl；
It is characterized in that, the mutual inductor awl includes high-voltage capacitance, the conducting rod both ends respectively with high-voltage capacitance and
The high pressure stem contact of insulation inner cone；The high-voltage capacitance quantity is the series connection of 2,2 high-voltage capacitances, and connecting wire is from high-voltage capacitance
Low-voltage side outlet forms 1 plant-grid connection point in mutual inductance awl bottom, and plant-grid connection point and calutron are electrically connected.
2. a kind of high voltage protection capacitance type potential transformer according to claim 1, which is characterized in that the high-voltage electricity
Holding is Ceramic high-pressure capacitor.
3. a kind of high voltage protection capacitance type potential transformer according to claim 1, which is characterized in that the electromagnetic installing
It sets and is internally provided with low-voltage capacitance, low-voltage capacitance and high-voltage capacitance pass through the plant-grid connection point string that is formed in mutual inductor awl bottom
Connection.
4. a kind of high voltage protection capacitance type potential transformer according to claim 1, which is characterized in that the low tension
Hold both ends and connects coil, the secondary independent grounding of low-voltage capacitance.
5. a kind of high voltage protection capacitance type potential transformer according to claim 1, which is characterized in that mutual inductor awl is also
Including epoxy resin, epoxy inner encapsulates high-voltage capacitance, conducting rod and conducting wire, and the connecting wire is from high-voltage capacitance
Low-voltage side outlet, connecting wire epoxy resin bottom formed plant-grid connection point.
6. a kind of high voltage protection capacitance type potential transformer according to claim 1, which is characterized in that the asphalt mixtures modified by epoxy resin
Rouge is conical.
7. a kind of high voltage protection capacitance type potential transformer according to claim 1, which is characterized in that it further include inserts,
The bottom surface of epoxy resin is provided with inserts.
8. a kind of high voltage protection capacitance type potential transformer according to claim 1, which is characterized in that further include sealing shield
Set, the outside of the epoxy resin and the inside of insulation inner cone are closely provided with sealing sheath.
9. a kind of high voltage protection capacitance type potential transformer according to claim 8, which is characterized in that the sealing shield
Set is silicon rubber insulation sealing sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810793492.2A CN108831682A (en) | 2018-07-19 | 2018-07-19 | A kind of high voltage protection capacitance type potential transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810793492.2A CN108831682A (en) | 2018-07-19 | 2018-07-19 | A kind of high voltage protection capacitance type potential transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108831682A true CN108831682A (en) | 2018-11-16 |
Family
ID=64140806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810793492.2A Withdrawn CN108831682A (en) | 2018-07-19 | 2018-07-19 | A kind of high voltage protection capacitance type potential transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108831682A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884370A (en) * | 2019-02-27 | 2019-06-14 | 河南凯瑞电气设备有限公司 | A kind of electronic voltage transducer |
| CN117214505A (en) * | 2023-09-28 | 2023-12-12 | 国网江苏省电力有限公司宿迁供电分公司 | ECT/EVT and insulating sleeve depth fusion type sensor |
-
2018
- 2018-07-19 CN CN201810793492.2A patent/CN108831682A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884370A (en) * | 2019-02-27 | 2019-06-14 | 河南凯瑞电气设备有限公司 | A kind of electronic voltage transducer |
| CN117214505A (en) * | 2023-09-28 | 2023-12-12 | 国网江苏省电力有限公司宿迁供电分公司 | ECT/EVT and insulating sleeve depth fusion type sensor |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181116 |