CN207663884U - A kind of 20kV ring main units threephase potential transformer - Google Patents
A kind of 20kV ring main units threephase potential transformer Download PDFInfo
- Publication number
- CN207663884U CN207663884U CN201721355094.XU CN201721355094U CN207663884U CN 207663884 U CN207663884 U CN 207663884U CN 201721355094 U CN201721355094 U CN 201721355094U CN 207663884 U CN207663884 U CN 207663884U
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- CN
- China
- Prior art keywords
- phase
- winding
- secondary winding
- iron core
- epoxy resin
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- Expired - Fee Related
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Abstract
A kind of 20kV ring main units threephase potential transformer, including iron core, three-phase first winding and three-phase secondary winding, the installing of three-phase secondary winding is on iron core, three-phase first winding is sleeved in three-phase secondary winding, is the main insulating layer of poured with epoxy resin between three-phase first winding and three-phase secondary winding.Three-phase first winding connects through a lead, fuse and elbow-type cable plug respectively.Epoxy resin housing outer surface is coated with semi-conductive layer outer surface.Housing outer surface lower part is fixed with secondary wiring terminals box.The lead-out wire of three-phase secondary winding is connect with the connecting terminal in secondary wiring terminals box respectively.The utility model can meet the technology requirement that state's net merges ring main unit first and second.It can especially remain to effectively inhibit various resonance conditions when the variation of power grid complexity, resonance are strong, ensure the high-precision of metering, ensure the reliability service of electrical equipment.The volume of net cabinet can be reduced using the utility model.
Description
Technical field
The utility model mutual inductor, more particularly to a kind of indoor application threephase potential transformer.
Background technology
China's distribution voltage is promoted from pervious 380V to 10KV, and the examination that 10kV rises to 20kV is also carried out in some areas
Point.With the aggregation of city high rise building housing facilities, the formation of electricity consumption and the grouping of the world economy of production and scale are concentrated, high pressure is needed
Power transmission is to load center.If voltage, which is increased to 20kV, lies prostrate grade, it is possible to reduce line loss is saved material and is consumed, it is economical and
Social benefit is considerable.But unstability is big in the operation of power grid super-pressure, national grid, especially urban distribution network are being transported
There are the situations such as harmonic wave and three-phase load unbalance in row, and difficulty is brought to metering, the monitoring of 20KV ring main units.It is used at present
Voltage transformer cannot preferably meet the technology requirement that state's net merges ring main unit first and second, exist in operation to power grid
Harmonic wave adaptability is poor.Therefore, it is necessary to it is a kind of state's net is measured and is monitored when, adapt to the situation of change in power grid complexity
Under, it can ensure to measure, and can effectively inhibit various resonance, ensure the threephase potential transformer of the reliability service of electrical equipment.
Utility model content
The purpose of this utility model is to provide a kind of indoor application 20kV ring main unit threephase potential transformers, can be ideal
Meet the technology requirement that state's net merges ring main unit first and second, under power grid complexity situation of change, can effectively inhibit various humorous
It shakes, ensures the reliability service of the precision and electrical equipment that measure.
The technical solution adopted is that：
A kind of 20kV ring main units threephase potential transformer, including iron core, three-phase first winding and three-phase secondary winding,
It is characterized in that：
Three-phase secondary winding is sleeved on iron core around being located on secondary skeleton, three-phase first winding be wound on it is primary absolutely
Edge skeleton upper rear set is poured with epoxy resin between three-phase first winding and three-phase secondary winding in three-phase secondary winding
Main insulating layer.Three-phase first winding uses star row connection, neutral point to be grounded through emotional resistance.Three-phase first winding passes through primary respectively
Lead, fuse and elbow-type cable plug connect.The rear end of lead of three-phase and elbow-type cable plug is encapsulated in elbow-type insulation
In column.Iron core, three-phase first winding and three-phase secondary winding pour into an overall structure, epoxy resin by epoxy resin
Pour mass is shell.Housing outer surface is after blasting treatment, then sprays semi-conductive layer outer surface, is at and ground equipotential
State.Housing outer surface lower part is fixed with secondary wiring terminals box.The lead-out wire of three-phase secondary winding respectively with secondary connection end
Connecting terminal connection in sub- box.Threephase potential transformer complete machine is mounted on by footing inserts in looped network cabinet, due to complete machine
Outer surface can be close to the installation of ring main unit shell, make cabinet volume smaller in ground state.
Iron core is casting insulated using QZ/180 high-temperature resistant enamelled wires and epoxide resin vacuum.
Important technological parameters：
Voltage ratio：20/0.1/0.22kV
Accuracy class：0.2/3
Rated output capacity：30/800VA
Frequency：50/60Hz
Type of device：It is indoor
The advantages of the utility model：
The utility model is used for 20kV ring main units.The utility model secondary coil can provide metering, monitoring and power supply
Winding can meet the technology requirement that state's net merges ring main unit first and second.It especially can be strong in the variation of power grid complexity, resonance
It when strong, remains to effectively inhibit various resonance conditions, ensures the high-precision of metering, ensure the reliability service of electrical equipment.Using this
Utility model can reduce the volume of net cabinet.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of embodiment of the utility model.
Fig. 2 is the front view of the utility model.
Fig. 3 is the right view of Fig. 2.
Fig. 4 is the vertical view of Fig. 2.
Specific implementation mode
A kind of 20kV ring main units threephase potential transformer, including iron core 6, three-phase first winding 1 and three-phase secondary winding
4, it is characterised in that：
Three-phase secondary winding 4 is sleeved on iron core 6 around being located on secondary skeleton 5, and three-phase first winding 1 is around being located at one
2 upper rear set of minor insulation skeleton is asphalt mixtures modified by epoxy resin in three-phase secondary winding 4, between three-phase first winding 1 and three-phase secondary winding 4
The main insulating layer 3 of fat cast.Three-phase first winding 1 uses star row connection, neutral point to be grounded through emotional resistance.Three-phase first winding
1 connect through a lead and fuse 8 with elbow-type cable plug 10 respectively, and lead of three-phase, fuse 8, elbow-type cable are inserted
First 10 rear portion rear portion is encapsulated in epoxy resins insulation column 12.Iron core 6, three-phase first winding 1 and three-phase secondary winding 4, by
Epoxy resin pours into an overall structure, and epoxy resin poured body is shell 13.13 outer surface of shell is through blasting treatment
Afterwards, then it is coated with semiconducting coating 9, be at and ground equipotential state.13 outer surface lower part of shell is fixed with secondary connection
Terminal board 14.The lead-out wire of three-phase secondary winding 4 is connect with the connecting terminal 11 in secondary wiring terminals box 14 respectively.Three-phase electricity
It presses mutual inductor complete machine to be mounted in looped network cabinet by footing inserts 7, since whole appearance face is in ground state, can be close to
Ring main unit shell is installed, and cabinet volume smaller is made.
Iron core is casting insulated using QZ/180 high-temperature resistant enamelled wires and epoxide resin vacuum.
Claims (1)
1. a kind of 20kV ring main units threephase potential transformer, including iron core (6), three-phase first winding (1) and three-phase it is secondary around
Group (4), it is characterised in that：
Three-phase secondary winding (4) is sleeved on iron core (6), three-phase first winding (1) winding around being located on secondary skeleton (5)
In primary insulation skeleton (2) upper rear set in the three-phase secondary winding (4), three-phase first winding (1) and three-phase secondary winding it
Between be poured with epoxy resin main insulating layer (3);Three-phase first winding (1) uses star row connection, neutral point to be connect through emotional resistance
Ground;Three-phase first winding (1) is connect through a lead and fuse (8) with elbow-type cable plug (10) respectively, and three-phase once draws
Line, fuse (8), elbow-type cable plug (10) rear portion be encapsulated in epoxy resins insulation column (12);Iron core（6）, three-phase one
Secondary winding（1）With three-phase secondary winding（4）, an overall structure is poured by epoxy resin, epoxy resin poured body is
Shell（13）；Shell（13）Outer surface is after blasting treatment, then is coated with semiconducting coating（9）；Shell（13）Outer surface lower part
It is fixed with secondary wiring terminals box（14）；Three-phase secondary winding（4）Lead-out wire respectively with secondary wiring terminals box（14）Interior
Connecting terminal（11）Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721355094.XU CN207663884U (en) | 2017-10-20 | 2017-10-20 | A kind of 20kV ring main units threephase potential transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721355094.XU CN207663884U (en) | 2017-10-20 | 2017-10-20 | A kind of 20kV ring main units threephase potential transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207663884U true CN207663884U (en) | 2018-07-27 |
Family
ID=62938459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721355094.XU Expired - Fee Related CN207663884U (en) | 2017-10-20 | 2017-10-20 | A kind of 20kV ring main units threephase potential transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207663884U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107749337A (en) * | 2017-10-20 | 2018-03-02 | 湖北大二互科技股份有限公司 | A kind of 20kV ring main units threephase potential transformer |
| CN114050040A (en) * | 2021-11-24 | 2022-02-15 | 镇江市丹高电器有限公司 | Large-capacity three-phase voltage transformer |
-
2017
- 2017-10-20 CN CN201721355094.XU patent/CN207663884U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107749337A (en) * | 2017-10-20 | 2018-03-02 | 湖北大二互科技股份有限公司 | A kind of 20kV ring main units threephase potential transformer |
| CN114050040A (en) * | 2021-11-24 | 2022-02-15 | 镇江市丹高电器有限公司 | Large-capacity three-phase voltage transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180727 Termination date: 20191020 |