CN206819867U - Pole-mounted circuit breaker single-phase current transformer - Google Patents

Pole-mounted circuit breaker single-phase current transformer Download PDF

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Publication number
CN206819867U
CN206819867U CN201720153522.4U CN201720153522U CN206819867U CN 206819867 U CN206819867 U CN 206819867U CN 201720153522 U CN201720153522 U CN 201720153522U CN 206819867 U CN206819867 U CN 206819867U
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CN
China
Prior art keywords
current transformer
phase current
pole
circuit breaker
mounted circuit
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Expired - Fee Related
Application number
CN201720153522.4U
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Chinese (zh)
Inventor
陈剑萍
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Hangzhou Linger Electric Power Technology Co Ltd
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Hangzhou Linger Electric Power Technology Co Ltd
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Priority to CN201720153522.4U priority Critical patent/CN206819867U/en
Application granted granted Critical
Publication of CN206819867U publication Critical patent/CN206819867U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

It the utility model is related to current transformer high-voltage electrical apparatus and manufacture and design field, particularly a kind of pole-mounted circuit breaker single-phase current transformer, pole-mounted circuit breaker includes metal conductive bar, single-phase current transformer includes mutual inductor coil and secondary high-temperature lead, the through hole passed through for metal conductive bar is provided among the iron core of mutual inductor coil, single-phase current transformer is installed in metal conductive bar by through hole;Mutual inductor coil and secondary high-temperature lead surrounding fill insulant, insulating materials outside are provided with full skirt;Single-phase current transformer lower end is connected with fairlead, and secondary high-temperature wire is drawn through fairlead;The conductive metal pipe with the metal conductive bar and insulating materials close contact is provided with the inside of through hole.The utility model is by increasing conductive metal pipe, the gap filled up between metal conductive bar and current transformer, reduces the shelf depreciation of single-phase current transformer, improves stability and the life-span of single-phase current transformer operation.It is and simple in construction, easy to use.

Description

Pole-mounted circuit breaker single-phase current transformer
Technical field
It the utility model is related to current transformer high-voltage electrical apparatus and manufacture and design field, more particularly to a kind of pole-mounted circuit breaker list Phase current mutual inductor.
Background technology
Current transformer is that electric current, the equipment of relay protection are measured in power system, at present on-pole switch, particularly open air High-pressure vacuum breaker(Also known as:Standard type vacuum switch), current transformer generally is installed on primary conductive bar.Existing peace Current transformer generally use poured with epoxy resin or silicon rubber pressure injection on primary conductive bar form, and both do not allow Easily meet the requirement in national standard to pole-mounted circuit breaker current transformer partial discharge quantity.Pole-mounted circuit breaker current transformer is being tested In can not meet Standard, in practice partial discharge quantity be likely to be breached hundreds of even thousands of pC.In power system, often because mutually The partial discharge quantity of sensor is too high, and influences life-span and the long-time stability of current transformer, it will the safety belt to power network comes Great potential safety hazard.
Utility model content
Deficiency, pole-mounted circuit breaker single-phase current transformer provided by the utility model, efficiently solves post for more than The problem of upper circuit breaker electric current transformer is local high-volume too high.
The technical solution of the utility model is:
A kind of pole-mounted circuit breaker single-phase current transformer, including pole-mounted circuit breaker and single-phase current transformer, on the post Breaker includes metal conductive bar, and the single-phase current transformer includes mutual inductor coil and secondary high-temperature lead, the mutual inductance The through hole passed through for metal conductive bar is provided among the iron core of device coil, the single-phase current transformer is installed by through hole In in metal conductive bar;Mutual inductor coil and secondary high-temperature lead the surrounding fill insulant, the insulating materials outside Provided with full skirt;The single-phase current transformer lower end is connected with fairlead, and the secondary high-temperature wire is drawn through fairlead;Its It is characterised by, the conductive metal pipe with the metal conductive bar and insulating materials close contact is provided with the inside of the through hole.
The rounded tubulose of conductive metal pipe.
The conducting metal tube thickness is 0.5~5 millimeter, preferably 1 millimeter.
The conductive metal pipe material is that stainless steel, copper, aluminium, aluminium alloy, iron or silver any of are worked as.
The conducting metal bore is 0~6 millimeter, preferably 1 millimeter with metal conductive bar major diameter fit tolerance.
The insulating materials is electrically insulating silicone rubber, and the conductive metal pipe passes through vulcanization or liquid dielectric under mould high temperature Silica gel is bonded, and is combined together with the electrically insulating silicone rubber.
The insulating materials is epoxy resin, and the conductive metal pipe is bonded by liquid dielectric silica gel, with the epoxy Resin combines together.
The fairlead is stainless steel tube.
The technical solution of the utility model is by setting and metal conductive bar on the inside of the through hole of transformer iron core and absolutely The conductive metal pipe of edge material tight contact, the space filled up between the insulating materials of metal conductive bar summation current transformer, Electric field local distortion will not be made and produce point discharge, single-phase current transformer entirety local discharging level is met national mark Standard, product quality is improved, improve the stability of Operation of Electric Systems.
Brief description of the drawings
Fig. 1 is the utility model simplex winding current transformer schematic cross-section;
Fig. 2 is the utility model double-winding current transformer schematic cross-section.
Embodiment
Design, concrete structure and caused technique effect of the present utility model are made furtherly below with reference to accompanying drawing It is bright, to be fully understood from the purpose of this utility model, feature and effect.
Fig. 1 be pole-mounted circuit breaker single-phase current transformer of the present utility model embodiment one and embodiment two, simplex winding Two kinds of embodiments of single-phase current transformer.Fig. 2 is embodiment three of the present utility model and example IV, double winding single-phase electricity Two kinds of embodiments of current transformer.
Embodiment one, with reference to figure 1, current transformer 2 is simplex winding current transformer.Top is provided with mutual inductor coil 21 With secondary high-temperature lead 22, lower end is connected with stainless steel tube 3, and the secondary high-temperature wire 22 is through the hole of stainless steel tube 3 and draws; The through hole 1 passed through for metal conductive bar, the mutual inductor coil 21 and two are provided among the iron core of the mutual inductor coil 21 The secondary surrounding of high temperature lead 22 fills electrically insulating silicone rubber 24, and the outside of electrically insulating silicone rubber 24 is provided with full skirt;The inner side of through hole 1 It is provided with the conductive aluminum pipe 25 with metal conductive bar and the close contact of electrically insulating silicone rubber 24.The 25 rounded pipe of conductive aluminum pipe Shape, thickness are 1 millimeter.
Embodiment is that transformer iron core is wrapped up into enamel-covered wire with insulating cloth tape and simplex winding forms mutual inductor coil 21, transformer iron core 21 is put in the mould of transformer making, transformer secondary high-temperature lead 22 passes through the hole of stainless steel tube 3 simultaneously Draw, electrically insulating silicone rubber is filled up in mutual inductor coil 21 and the surrounding of secondary high-temperature lead 22, start mould and allow above-mentioned device in mould It is current transformer product through sulfidization molding after a while through high temperature vulcanized in chamber.Conductive aluminum pipe 25 is put into die cavity in advance With passing through high temperature vulcanized shaping together with other devices, combined together with the electrically insulating silicone rubber of current transformer.
Metal conductive bar overall diameter is 20mm, in order that conductive aluminum pipe 25 is in close contact with insulating materials 24, avoids producing Space, the internal diameter of conductive aluminum pipe 25 are designed as 21 millimeters.
By arrangement above, conductive aluminum pipe 25 is filled with electrically insulating silicone rubber and the metal conductive bar junction of current transformer The space at position, both is realized that uniform close contacts, electric field local distortion will not be made and produce point discharge.Shelf depreciation refers to Mark is improved significantly, and can be less than 20pC, so as to significantly improve pole-mounted circuit breaker single-phase current transformer service life and peace Quan Xing.
Embodiment two, referring still to Fig. 1, current transformer 2 is simplex winding current transformer.Top is provided with transformer line Circle 21 and secondary high-temperature lead 22, lower end are connected with stainless steel tube 3, and the secondary high-temperature lead 22 passes through the hole of stainless steel tube 3 simultaneously Draw;The through hole 1 passed through for metal conductive bar, the mutual inductor coil 21 are provided among the iron core of the mutual inductor coil 21 Epoxy resin 24 is filled with the surrounding of secondary high-temperature lead 22, the outside of epoxy resin 24 is provided with full skirt;The inner side of through hole 1 It is provided with the conductive stainless steel tube 25 with metal conductive bar and the close contact of epoxy resin 24.The conductive stainless steel tube 25 is in circle Shape tubulose, thickness are 1 millimeter.
Embodiment is:Transformer iron core is wrapped up into enamel-covered wire with insulating cloth tape and simplex winding forms mutual inductor coil 21, transformer iron core 21 is put in the mould of transformer making, transformer secondary high-temperature lead 22 passes through the hole of stainless steel tube 3 simultaneously Draw, epoxy resin is filled up in mutual inductor coil 21 and the surrounding of secondary high-temperature lead 22, start mould and allow above-mentioned device in die cavity It is middle to be poured into a mould through high temperature, it is current transformer product through curing molding after a while, conductive stainless steel tube 25 is finally by liquid SOI glue sticking, combined together with the epoxy resin of current transformer.
Metal conductive bar overall diameter is 20mm, in order that conductive stainless steel tube 25 is in close contact with insulating materials 24, is avoided Space is produced, the internal diameter of conductive stainless steel tube 25 is designed as 21 millimeters.
By arrangement above, the epoxy resin that conductive stainless steel tube 25 is filled with current transformer is connected with metal conductive bar Locate the space at position, both is realized that uniform close contacts, electric field local distortion will not be made and produce point discharge.Shelf depreciation Index is improved significantly, and can be less than 20pC, so as to significantly improve pole-mounted circuit breaker single-phase current transformer service life and Security.
Embodiment three, with reference to figure 2, current transformer is double-winding current transformer, remaining set with the phase of embodiment one Together.Example IV, with reference to figure 2, current transformer is double-winding current transformer, and remaining setting is identical with embodiment two.It is logical Arrangement above is crossed, embodiment three and four can reach same effect.
Compared with prior art, the utility model is simple in construction, easy to use, by increasing conductive metal pipe, makes single-phase Current transformer entirety local discharging level meets national standard, improves product quality, and it is mutual to improve pole-mounted circuit breaker monophase current The stability of sensor operation and life-span.
Disclosed above is only embodiment of the present utility model, and still, the utility model is not limited to this, any ability What the technical staff in domain can think change should all fall into the scope of protection of the utility model.

Claims (10)

1. a kind of pole-mounted circuit breaker single-phase current transformer, including pole-mounted circuit breaker and single-phase current transformer(2), on the post Breaker includes metal conductive bar, the single-phase current transformer(2)Including mutual inductor coil(21)With secondary high-temperature lead (22), the mutual inductor coil(21)Iron core among be provided with the through hole passed through for metal conductive bar(1), the monophase current Transformer(2)Pass through through hole(1)It is installed in metal conductive bar;The mutual inductor coil(21)With secondary high-temperature lead(22) Surrounding fill insulant(24), the insulating materials(24)Outside is provided with full skirt;The single-phase current transformer(2)Lower end with Fairlead(3)It is connected, the secondary high-temperature lead(22)Through fairlead(3)Draw;Characterized in that, the through hole(1) Inner side is provided with and the metal conductive bar and insulating materials(24)The conductive metal pipe of close contact(25).
2. pole-mounted circuit breaker single-phase current transformer as claimed in claim 1, it is characterised in that the conductive metal pipe(25) Rounded tubulose.
3. pole-mounted circuit breaker single-phase current transformer as claimed in claim 2, it is characterised in that the conductive metal pipe(25) Thickness is 0.5~5 millimeter.
4. pole-mounted circuit breaker single-phase current transformer as claimed in claim 3, it is characterised in that the conductive metal pipe(25) Thickness is 1 millimeter.
5. pole-mounted circuit breaker single-phase current transformer as claimed in claim 3, it is characterised in that the conductive metal pipe(25) Material is that stainless steel, copper, aluminium, aluminium alloy, iron or silver any of are worked as.
6. pole-mounted circuit breaker single-phase current transformer as claimed in claim 3, it is characterised in that the conductive metal pipe(25) Internal diameter is 0~6 millimeter with metal conductive bar major diameter fit tolerance.
7. pole-mounted circuit breaker single-phase current transformer as claimed in claim 3, it is characterised in that the conductive metal pipe(25) Internal diameter is 1 millimeter with metal conductive bar major diameter fit tolerance.
8. pole-mounted circuit breaker single-phase current transformer as claimed in claim 3, it is characterised in that the insulating materials(24)For Electrically insulating silicone rubber, the conductive metal pipe(25)By under mould high temperature vulcanize or liquid dielectric silica gel be bonded, with it is described absolutely Edge silicon rubber combines together.
9. pole-mounted circuit breaker single-phase current transformer as claimed in claim 3, it is characterised in that the insulating materials(24)For Epoxy resin, the conductive metal pipe(25)It is bonded by liquid dielectric silica gel, is combined together with the epoxy resin.
10. pole-mounted circuit breaker single-phase current transformer as claimed in claim 3, it is characterised in that the fairlead(3)For not Become rusty steel pipe.
CN201720153522.4U 2017-02-21 2017-02-21 Pole-mounted circuit breaker single-phase current transformer Expired - Fee Related CN206819867U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720153522.4U CN206819867U (en) 2017-02-21 2017-02-21 Pole-mounted circuit breaker single-phase current transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720153522.4U CN206819867U (en) 2017-02-21 2017-02-21 Pole-mounted circuit breaker single-phase current transformer

Publications (1)

Publication Number Publication Date
CN206819867U true CN206819867U (en) 2017-12-29

Family

ID=60751442

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720153522.4U Expired - Fee Related CN206819867U (en) 2017-02-21 2017-02-21 Pole-mounted circuit breaker single-phase current transformer

Country Status (1)

Country Link
CN (1) CN206819867U (en)

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Granted publication date: 20171229