CN2244246Y - Independent sulfur hexafluoride mutural inductor - Google Patents
Independent sulfur hexafluoride mutural inductor Download PDFInfo
- Publication number
- CN2244246Y CN2244246Y CN 95243767 CN95243767U CN2244246Y CN 2244246 Y CN2244246 Y CN 2244246Y CN 95243767 CN95243767 CN 95243767 CN 95243767 U CN95243767 U CN 95243767U CN 2244246 Y CN2244246 Y CN 2244246Y
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- China
- Prior art keywords
- shield assembly
- wire
- lead
- sleeve pipe
- insulating sleeve
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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.)
- Expired - Lifetime
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Abstract
The utility model provides an independent sulfur hexafluoride mutual inductor. The phenomena that a shield assembly can not effectively equalize the pressure, and an insulation sleeve pipe is easy to chip exist in a traditional mutual inductor. In the utility model, the shield assembly is improved. The improved shield assembly is formed by that a metal film laminated tape is coiled. The laminated construction of the metal film laminated tape is formed by that at least one layer of polymer film and one layer of metal film are folded. Therefore, a pressure equalizing effect and a uniform electric field effect are provided. In the independent sulfur hexafluoride mutual inductor of the utility model, the insulating sleeve pipe is also improved. The improved insulating sleeve pipe is composed of a glass fibre reinforced sleeve pipe of an inner layer and a silicon rubber umbrella skirt of an outer layer.
Description
The utility model relates to a kind of current type and/or voltage transformer, relates in particular to use the free-standing voltage current transformer of sulphur hexafluoride as insulating gas, is applicable to the electric energy metrical and the protection of electric power system.
Induction transformer technology is developed in the nearly century in the past and is perfect.One class transformer of metering usefulness is referred to as instrument transformer.Measure electric current and when overcurrent, go out to send the current transformer of protection with the instrument transformer meaning of control signal.In the technology formerly, use resin, oilpaper, electroceramics, transformer wet goods medium mostly as insulating material.After striding into 1960's, many countries for adapt to the urban population high concentration, building gathers and situation such as electricity consumption density sharp increase, the electric pressure at power transmission and transformation station steps into 110KV, 220KV, 300KV, 500KV successively, and develops towards 765KV.The power capacity of electric power system transmission is also increasing.Electric current, voltage are one of the heaviest parameters that needs in the electric power system to measure, and therefore, just develop and have developed with the gas isolated electric equipment of sulphur hexafluoride (SF6), wherein all include instrument transformer.For guaranteeing power supply safety, used current transformer, voltage transformer must have higher reliability and long useful life in the electric power system.
Conventional instrument transformer is paper oil insulation and insulator structure, and this class instrument transformer can not prevent the serious consequence of exploding and exploding and being produced effectively.Therefore, in case main insulation produces partial discharge, internal flashover makes the oil vaporization, because its Incoercibility will produce the pressure surge of a moment, makes the blast of oil immersion edge instrument transformer insulator.Fiery cigarette and insulator fragment that blast produces can damage nearby device, bring disaster to the scene, and the leakage of oil also pollutes the environment.
Sulphur hexafluoride is a kind of colourless, odorless, nontoxic and incombustible inert gas, and its dielectric strength height, arc extinction performance are good, and under an atmospheric pressure, dielectric strength is 3 times of air, with oil phase etc.So,, not only can dwindle the distance to the ground of live part, and switch, bus and instrument transformer can be made into packaged unit, make the entire equipment volume-diminished with the dielectric of SF6 as electric equipment.Chinese patent application (NO.87101790) " combined high-tension current and voltage transformer " as German MWB Messwandler-Bau Ag is exactly a kind of instrument transformer that adopts sulphur hexafluoride as insulating material.Generally comprise a secondary winding in this instrument transformer, No. one time conduit passes this secondary winding, and two ends of a conduit are concatenated in the electric power system.When having electric current to flow through in the electric power system, promptly induce corresponding induced current on the secondary winding.This induced current is downwards through lead-in wire output induced signal.Secondary winding is sealed in the housing, is centered on by shield assembly and insulating sleeve and lead-in wire is outer, all is full of SF6 gas in insulating sleeve and the housing.There is following several shortcoming in this instrument transformer: the shield assembly that plays all pressure, uniform electric field effect that (1) is centered around around the lead-in wire adopts single-layer metal to make.Along with improving constantly of electric power system power transmission and transformation station electric pressure, the pressure reduction between conduit and the secondary winding output also constantly increases, and makes this simple single-layer metal shield assembly not play effectively and all presses and the uniform electric field effect; (2) the same with the instrument transformer that adopts paper oil insulation, still adopt the insulator structure if be centered around the outer insulating sleeve of lead-in wire, though, the sulphur hexafluoride instrument transformer can not explode, but insulator still can not prevent the external force vibrations, as earthquake or external force collision, as shotgun shot etc. and cracked, easily human body is damaged; (3) after a conduit of above-mentioned patent application (NO.87101790) passes secondary winding, its two ends are extended downwards and are stretched out conductor terminal of housing bottom formation, and the part of a conduit extension downwards is parallel with the lead-in wire of secondary winding basically and spacing is nearer.Because what flow through on lead is high-tension current, and secondary winding and lead-in wire to go up what flow be low-tension current, the two distance is near, just causes discharge easily, even punctures insulating gas, the damage instrument transformer.
The purpose of this utility model is to provide that a kind of shield assembly can more effectively all be pressed, the free-standing sulphur hexafluoride instrument transformer of uniform electric field.
Another purpose of the present utility model is to provide the free-standing sulphur hexafluoride instrument transformer that a kind of insulating sleeve is not easily broken, mechanical strength is high, sealing property is good.
A purpose more of the present utility model is to provide a kind of binding post and secondary winding and lead spacing free-standing sulphur hexafluoride instrument transformer far away of a conduit.
Free-standing sulphur hexafluoride instrument transformer of the present utility model, comprise a current transformer that constitutes by conduit and secondary winding, described current transformer is positioned at a housing, a described conduit passes described secondary winding and described housing is stretched out at two ends, form one time conductor terminal, the output of described secondary winding is delivered to the secondary terminal that is positioned on the base downwards through a lead-in wire; Be wound with shield assembly in described lead-in wire periphery, be wound with insulating sleeve in described shield assembly periphery, described insulating sleeve and described housing and described base are tightly connected, formation one is full of the seal of sulfur hexafluoride gas, and described insulating sleeve is made of the glass fibre enhancing sleeve pipe and the outer field silicon rubber full skirt of internal layer.
As mentioned above,, adopted metallic film lamination zone circle to turn to, improved not only that it is all pressed, the effect of uniform electric field, the also easier manufacturing of this shield assembly simultaneously owing to improved the structure of shield assembly.
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing, other purpose of the present utility model and advantage will be embodied from following description.
Fig. 1 is the structural representation of an embodiment of free-standing sulphur hexafluoride instrument transformer of the present utility model;
Fig. 2 is the structural representation of the compound insulating sleeve among Fig. 1;
Fig. 3 is the enlarged drawing of flange and insulating sleeve junction among Fig. 2;
Fig. 4 is the structural representation of shield assembly among Fig. 1;
Fig. 5 is the stepped construction figure that constitutes the metallic film laminated tape of shield assembly;
Fig. 6 is a support bracket fastened schematic diagram among Fig. 4;
Fig. 7 is the structural representation of another embodiment of the present utility model;
Fig. 8 is the structural representation of another embodiment of the present utility model.
See also Fig. 1, the figure middle and upper part is a current transformer, and this current transformer comprises conduit 10 and secondary winding 18, and secondary winding 18 is on iron core 16, and No. one time conduit 10 passes secondary winding 18.The outside horizontal-extending in conduit 10 both sides, and the sidewall that stretches out the housing 17 that holds current transformer forms conductor terminal 11a, a 11b.These twice conductor terminal 11a, 11b are concatenated on the hv transmission line.Secondary winding 18 and iron core 16 are fixed in the center of housing 17 by cylindrical shape strutting piece 13.The output of secondary winding 18 is sent to downwards on the secondary terminal 27 that is positioned on the base 26 through lead-in wire (be arranged in lead-in wire sleeve pipe 24, lead-in wire does not draw among the figure), is sent on all kinds of metrical instruments or the instrument by secondary terminal 27 again.Lead-in wire is wound with shield assembly 29 by 24 protections of lead-in wire sleeve pipe in lead-in wire sleeve pipe 24 peripheries, and this shield assembly 29 plays all presses and the uniform electric field effect.
The concrete structure of shield assembly 29 as shown in Figure 4, it is cylindric that an internal diameter reduces gradually, this cylindric shield assembly 29 be enclosed within the lead-in wire sleeve pipe 24 outside.Fixed support 29a and following fixed support 29b on one are arranged in shield assembly 29, the structure of fixed support 29a, 29b as shown in Figure 6, it is in the form of annular discs, the internal diameter of its external diameter and shield assembly 29 matches, in fixed support 29a, 29b central authorities one location hole 29c is arranged, this hole 29c matches with the external diameter of lead-in wire sleeve pipe 24, and fixed support 29a, 29b can be enclosed within on the lead-in wire sleeve pipe 24.Traditional shield assembly is directly made with metallic plate, and in the present embodiment, and shield assembly 29 cylindraceous is to be turned to by as shown in Figure 5 metallic film laminated tape 40 circles.This metallic film laminated tape 40 is made of two-layer at least, and one deck is thin polymer film 40a, and another layer is metal level 40b, and this metallic film band also can be superimposed by multilayer polymer film and metal level and form certainly.When making, prepare the identical cylinder of a shape and shield assembly to be made 29 earlier as mould, be with 40 to enclose on this mould with metallic film is folded, at last mould is deviate from, just formed shield assembly.The advantage of the shield assembly of making like this 29 is all to press with the uniform electric field effect goodly at it, makes the electric field energy even variation around the lead-in wire sleeve pipe 24.
Return Fig. 1, also have a compound insulating sleeve 30 in the outer ring of shield assembly 29, the concrete structure of this compound insulating sleeve 30 as shown in Figure 2, it two-layerly is made of inside and outside, internal layer is that glass fibre strengthens sleeve pipe 32, skin is a silicon rubber cluster parachute 31.Compound insulating sleeve 30 tops and housing 17 and compound insulating sleeve 30 bottoms and base 26 all are tightly connected.Concrete method of attachment as shown in Figure 3, on the glass fibre enhancing sleeve pipe 32 of insulating sleeve 30, put a flange 23, strengthen formation one sealing bonded adhesives groove 33 between the sleeve pipe 32 at flange 23 and glass fibre, and in this glue groove 33, pour into bonded adhesives, flange 23 and glass fibre are strengthened between the sleeve pipe 32 be tightly connected.On flange 23, have a screw 23a, by this screw 23a flange 23 is fixed to (as shown in Figure 1) on the housing 17, between flange 23 and housing 17, can also be encased inside a seal washer 41, to improve sealing property with connectors such as screw or bolts 28.Compound insulating sleeve 30 bottoms are also adopted with last identical method and are linked to each other with the base sealing by lower flange 25.
As shown in Figure 1, base 26 is provided with a charge valve 44, and sulfur hexafluoride gas enters in base 26, compound insulating sleeve 30 and the housing 17 by this charge valve 44.At charge valve 44 an air seal table 43 is installed, is used to measure the gas density in the seal.On housing 17 tops one burst disk 14 is installed, when the gas pressure in the seal was too high, burst disk 14 was at first cracked, discharged gas, in order to avoid housing 17, compound insulating sleeve 30 or base explosion.
As mentioned above,, the mechanical strength of sleeve pipe is improved, and have sizable flexibility because insulating sleeve 30 has adopted glass fibre to strengthen the composite construction of sleeve pipe 32 and silicon rubber full skirt 31, can antidetonation, impact resistance, thus prolonged useful life of instrument transformer.
See also Fig. 7, Fig. 7 shows the structural representation of another embodiment of the present utility model.This present embodiment and embodiment difference shown in Figure 1 are to have set up a voltage transformer 50 in housing 17.The secondary winding output of this voltage transformer 50 is also delivered to secondary conductor terminal 27 downwards by the lead-in wire cover.
See also Fig. 8, Fig. 8 shows the structural representation of another embodiment of the present utility model.The instrument transformer of this embodiment comprises that one includes the voltage transformer 50 of winding and secondary winding (not shown).Voltage transformer 50 is positioned at a housing 60, and the secondary winding of voltage transformer 50 is connected on the secondary conductor terminal 27, outputs on the follow-up all kinds of measuring equipments or instrument again.The a winding one end ground connection of voltage transformer 50, the other end 61 upwards is connected on the once end 11 of top through going between, and once holds 11 to receive on the high voltage transmission line.Identical as Fig. 1 embodiment, the lead-in wire 61 also be positioned at the lead-in wire sleeve pipe 24 ', be wound with in lead-in wire sleeve pipe 24 ' periphery shield assembly 29 ', this shield assembly 29 ' structure and effect identical with Fig. 1 embodiment, be wound with in shield assembly 29 ' periphery compound insulating sleeve 30 '.This compound insulating sleeve 30 ' structure and with the method for attachment of housing 60 all the embodiment with Fig. 1 is identical, therefore, no longer repeat at this.
By embodiment the utility model is done concrete description above, can also make many variations to the foregoing description according to design of the present utility model certainly.Therefore, scope of the present utility model should be limited by appended claims.
Claims (9)
1. free-standing sulphur hexafluoride instrument transformer, comprise a current transformer that constitutes by conduit and secondary winding, described current transformer is positioned at a housing, a described conduit passes described secondary winding and housing is stretched out at two ends, form one time conductor terminal, the output of described secondary winding is delivered to the secondary terminal that is positioned on the base downwards through a lead-in wire, centering on of described lead-in wire shield assembly is arranged, be wound with insulating sleeve in described shield assembly periphery, described insulating sleeve and described housing and described base are tightly connected and form a seal that is full of sulfur hexafluoride gas, it is characterized in that described shield assembly is turned to by metallic film lamination zone circle, the laminated construction of described metallic film laminated tape is at least the one layer of polymeric film and layer of metal film is formed by stacking.
2. free-standing sulphur hexafluoride instrument transformer as claimed in claim 1 is characterized in that, described shield assembly fixes by the sleeve pipe outside fixed support and the described lead-in wire; Described fixed support is in the form of annular discs, the internal diameter of its external diameter and described shield assembly matches, one location hole that matches with described lead-in wire cover external diameter of pipe is arranged in the central, and described fixed support is inserted in the described shield assembly, and the location hole on it is enclosed within on the described lead-in wire sleeve pipe.
3. free-standing sulphur hexafluoride instrument transformer as claimed in claim 1 is characterized in that, described insulating sleeve is made of the glass fibre enhancing sleeve pipe and the outer field silicon rubber full skirt of internal layer.
4. free-standing sulphur hexafluoride instrument transformer as claimed in claim 3 is characterized in that, described insulating sleeve links to each other with described base with described housing respectively with lower flange by upper flange; The glass fibre that described upper flange and lower flange are linked in described insulating sleeve strengthens on the sleeve pipe, and forms a sealing bonded adhesives groove between the two, and described upper flange and lower flange are connected respectively on described housing and the described base by connector.
5. as claim 1 or 3 described free-standing sulphur hexafluoride instrument transformers, it is characterized in that described housing sidewall is stretched and stretched out to the outside respectively level in described conduit both sides, forms one time conductor terminal.
6. independent sulphur hexafluoride instrument transformer, comprise that one includes the voltage transformer of winding and secondary winding, described voltage transformer is positioned at housing, a winding of described voltage transformer upwards links to each other with a terminal through lead-in wire, be wound with shield assembly in described lead-in wire periphery, be wound with insulating sleeve in described shield assembly periphery, described insulating sleeve and described housing seal are connected to form a seal that is full of sulfur hexafluoride gas, it is characterized in that, described shield assembly is turned to by metallic film lamination zone circle, and the laminated construction of described metallic film laminated tape is at least the one layer of polymeric film and layer of metal film is formed by stacking.
7. free-standing sulphur hexafluoride instrument transformer as claimed in claim 6, it is characterized in that, described shield assembly fixes by the sleeve pipe outside fixed support and the described lead-in wire, described fixed support is in the form of annular discs, the internal diameter of its profile and described shield assembly matches, one location hole that matches with described lead-in wire cover external diameter of pipe is arranged in the central, and described fixed support is inserted in the described shield assembly, and the location hole on it is enclosed within on the described lead-in wire sleeve pipe.
8. free-standing sulphur hexafluoride instrument transformer as claimed in claim 6 is characterized in that, described insulating sleeve is made of the glass fibre enhancing sleeve pipe and the outer field silicon rubber cluster parachute of internal layer.
9. free-standing sulphur hexafluoride instrument transformer as claimed in claim 8, it is characterized in that, described insulating sleeve links to each other with housing by flange, the glass fibre that described flange is linked in described insulating sleeve strengthens on the sleeve pipe, and form a sealing bonded adhesives groove between the two, described flange is connected on the described housing by connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95243767 CN2244246Y (en) | 1995-04-14 | 1995-04-14 | Independent sulfur hexafluoride mutural inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95243767 CN2244246Y (en) | 1995-04-14 | 1995-04-14 | Independent sulfur hexafluoride mutural inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2244246Y true CN2244246Y (en) | 1997-01-01 |
Family
ID=33884298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95243767 Expired - Lifetime CN2244246Y (en) | 1995-04-14 | 1995-04-14 | Independent sulfur hexafluoride mutural inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2244246Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958168A (en) * | 2010-08-23 | 2011-01-26 | 无锡市锡容电力电器有限公司 | Voltage divider casing pipe for electronic type mutual inductor |
| CN102479610A (en) * | 2010-11-26 | 2012-05-30 | 江苏思源赫兹互感器有限公司 | Combined electronic mutual inductor |
| CN105466940A (en) * | 2015-11-16 | 2016-04-06 | 赵飞腾 | Inflatable current transformer defect monitoring device |
| CN105629021A (en) * | 2015-11-16 | 2016-06-01 | 赵玉洁 | Voltage transformer |
| CN110088859A (en) * | 2016-12-21 | 2019-08-02 | Abb瑞士股份有限公司 | Combination instrument mutual inductor for high-voltage applications |
-
1995
- 1995-04-14 CN CN 95243767 patent/CN2244246Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958168A (en) * | 2010-08-23 | 2011-01-26 | 无锡市锡容电力电器有限公司 | Voltage divider casing pipe for electronic type mutual inductor |
| CN102479610A (en) * | 2010-11-26 | 2012-05-30 | 江苏思源赫兹互感器有限公司 | Combined electronic mutual inductor |
| CN105466940A (en) * | 2015-11-16 | 2016-04-06 | 赵飞腾 | Inflatable current transformer defect monitoring device |
| CN105629021A (en) * | 2015-11-16 | 2016-06-01 | 赵玉洁 | Voltage transformer |
| CN105629021B (en) * | 2015-11-16 | 2016-11-30 | 国网山东省电力公司蓬莱市供电公司 | Voltage transformer |
| CN110088859A (en) * | 2016-12-21 | 2019-08-02 | Abb瑞士股份有限公司 | Combination instrument mutual inductor for high-voltage applications |
| CN110088859B (en) * | 2016-12-21 | 2021-11-16 | 日立能源瑞士股份公司 | Combined instrument transformer for high voltage applications |
| US11328863B2 (en) | 2016-12-21 | 2022-05-10 | Hitachi Energy Switzerland Ag | Combined instrument transformer for HV applications |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |