CN2452110Y

CN2452110Y - Dry type high voltage current mutual inductor

Info

Publication number: CN2452110Y
Application number: CN 00258261
Authority: CN
Inventors: 王钰; 李培国; 陈建可; 李桂军; 王纯山
Original assignee: Langfang Development Zone Electric Power Technology Co ltd
Current assignee: Beijing Sowell Electric Power Technology Co., Ltd.
Priority date: 2000-10-20
Filing date: 2000-10-20
Publication date: 2001-10-03
Anticipated expiration: 2010-10-20

Abstract

The utility model relates to a dry type high-voltage current mutual inductor, which comprises a U-shaped flow guiding body. The outside of the utility model is provided with a capacitance type core body, the bottom of the utility model is provided with a secondary winding, and the parts which are assembled are arranged in a wire connecting box body. The utility model is characterized in that the capacitance core body is formed by the alternation of dry insulating material and a capacitance screen; an isolation structure is arranged between the U-shaped flow guiding body and the capacitance type core body; the outside of the capacitance type core body is provided with a mechanical outer sheath which is fixed on the wire connecting box body; the interval between mechanical outer sheath and the capacitance core body is filled with insulating material; the mechanical outer sheath is fixedly provided with a shed. The utility model has the advantages of good mechanical structure, simple maintenance, good anti-fouling property, high reliability, no oil, on gas, and no porcelain.

Description

Dry Type High Tension Current Transformer

The utility model relates to a kind of high-tension current inductor, particularly a kind of Dry Type High Tension Current Transformer.

Existing high-tension current inductor is mainly by following several structures:

1, as shown in Figure 1, be a kind of oil-filled current transformer, it is to hold multi-layer cable paper outside winding 1 of U type, and constitutes capacitance type structure 2 with metal forming as capacitance plate, secondary winding 3 is set in winding bottom, is dipped in then in the fuel tank 5 that mainly is made of insulator that is full of oil 4.Its shortcoming is: quality is big, and insulator is easy to damage, easy to leak, and inflammable and explosive, antifouling property is relatively poor, and maintenance workload is big.

2, Figure 2 shows that a kind of current transformer that fills insulating gas, it is that winding 6 and secondary winding 7 are packed in the casing that is full of insulating gas 89 that mainly is made of insulator jointly.Its shortcoming is: maintenance workload is big, and easy to leak, insulator are easy to damage, and problem of environmental pollution is arranged.

3, Figure 3 shows that the employing non-magnet material is as tubular element 10, its outer dry-type current transformer that adopts condenser type insulation system 11, its capacitance type structure adopts multiphase polymer cross-linking radiation heat-shrink tube as oversheath 12 outward, its outer suit silicon rubber full skirt 13, replace insulator with this, solve the problem that insulator is easy to damage, secondary winding 14 is set in outside the condenser type core body, and is in casing 15 inside.That this structure can remedy is oil-filled, the defective of inflation current transformer.But its existing problems are: the huge electric power when 1. tubular element will bear the electric power system overcurrent, the especially electric power when a winding has multiturn, and in this case, insulation is easy to impaired; 2. the silicon rubber full skirt of the outer suit of oversheath is bigger to condenser type insulating effect power, and under the electric power conduct, insulation is easier to impaired; Can't check when damaged appears in the winding insulation that 3. passes rigid tubular member, may cause occurring between tubular element and baffle circulation owing to the baffle exterior insulation is damaged and be in operation this moment, this circulation may cause device damage, influences the safe operation of electric power system.

The purpose of this utility model provides that a kind of operation maintenance is easy, and quality is little, and the antifouling properties height is fire-proof and explosion-proof, and mechanical property is good, high-tension current inductor safe and reliable to operation.

To achieve these goals, the utility model adopts following project organization:

A kind of Dry Type High Tension Current Transformer, comprise a U type baffle, U type baffle is provided with the condenser type core body outward, the bottom of U type baffle is provided with secondary winding, U type baffle, condenser type core body and secondary winding are installed in the wiring casing, it is characterized in that: described condenser type core body is as insulation by the dry type organic composite material, alternately constitute with capacitance plate, and between U type baffle and condenser type core body, be provided with the insulation isolation structure, this outside that is surrounded by the U type baffle of isolation structure and condenser type core body is provided with mechanical oversheath, be filled with insulating material between machinery oversheath and electric capacity core body, also overlap intrinsic full skirt on the mechanical oversheath.

Except that above-mentioned essential features, in specific implementation process, also can replenish following technology contents:

U type baffle shields electric the connection to make equipotential with the internal layer the 0th of electric capacity core body.Be to constitute by insulating resin pipe with high mechanical properties,

The machinery oversheath is to be made of the insulating resin pipe with high mechanical properties.

The machinery oversheath is to be installed on respectively outside two arms of the U type baffle that is surrounded by isolation structure and condenser type core body.

The machinery oversheath is to be installed on outside the U type baffle that is surrounded by isolation structure and condenser type core body.

The material of the capacitance plate of electric capacity core body is conduction or semiconductive film or metal forming.

The material of machinery oversheath is for being bonding agent with synthetic resin, and glass fibre and goods thereof are made the fiberglass reinforced plastics of reinforcing material.

The insulating material of filling between described mechanical oversheath and electric capacity core body is for pouring into and be solidificated in the macromolecular material between mechanical oversheath and electric capacity core body.

The utlity model has following advantage:

1, the utility model does not have the no gas of oil, compares with oil-filled or inflation porcelain overcoat high-tension current inductor, thoroughly solves leakage problems and inflammable and explosively waits danger by what seepage caused.

2, the utility model easy maintenance is compared with oil-filled or inflation porcelain overcoat high-tension current inductor, does not need to gather oil sample or the analysis of gas sample, does not need supplementary insulation oil or insulating gas.

3, the utility model on the make can be monitored baffle external insulation situation, the eddy current loss of eliminating fully in service, stop the problem that may cause occurring between tubular element and baffle circulation in service, operational reliability is increased substantially owing to the breakage of baffle exterior insulation.

4, the utility model machinery oversheath is by having high electric strength, the fiberglass reinforced plastics of high mechanical properties constitutes, the mechanical oversheath that is in operation bears huge electrodynamic action, and the full skirt cover is fixed in outside the mechanical oversheath, make condenser type main insulation avoid mechanical force, the main insulation material is difficult for impaired.With adopt non-magnet material as tubular element, its outer dry-type current transformer of condenser type insulation system that adopts is compared, the problem that makes main insulation bear electrodynamic action has obtained effective solution.

Below in conjunction with drawings and Examples the utility model is described in detail.

Description of drawings:

Fig. 1 is existing oil-filled porcelain overcoat current transformer structural representation.

Fig. 2 is the existing insulating gas porcelain overcoat current transformer structural representation that fills.

Fig. 3 adopts non-magnet material as tubular element for having now, its outer current transformer structural representation that adopts the condenser type insulation system.

Fig. 4 is first kind of structural representation of the utility model.

Fig. 5 is second kind of structural representation of the utility model insulation.

Figure 4 shows that the structure of first kind of embodiment, this kind Dry Type High Tension Current Transformer, comprise a U type baffle 16, the U type baffle 16 outer condenser type core bodys 18 that are provided with, the bottom of U type baffle 16 is provided with secondary winding 20, U type baffle 16, condenser type core body 18 and secondary winding 20 are installed in the wiring casing 21, itself and prior art as the difference of above-mentioned Dry Type High Tension Current Transformer shown in Figure 3 are: as described in condenser type core body 18 be as insulation by the dry type organic composite material, alternately constitute with capacitance plate, and between U type baffle 16 and condenser type core body 18, be provided with isolation structure 17, be provided with mechanical oversheath 19 in the outside of condenser type core body 18, the upper end of

machinery oversheath

19 and 16 sealings of U type baffle, the electric capacity core body end screen hermetic terminal of its lower end and condenser type core body 18 joins and is fixed on the wiring casing 21, be filled with insulating material 22 between machinery oversheath 19 and electric capacity core body, this insulating material 22 is for perfusion and is solidificated in the macromolecular material of 18 in mechanical oversheath 19 and condenser type core body that this macromolecular material is silicon rubber or silicone grease etc. or other macromolecular materials in the present embodiment.

Also overlap intrinsic full skirt 23 on the machinery oversheath 19.

The isolation structure that above-mentioned U type baffle 16 and condenser type core body are 18 adopts multiphase polymer cross-linking radiation heat-shrink tube seal protection, and internal layer the 0th screen of the 0th screen of shop condenser type core body is made equipotential with electric connection outside it.

Said mechanical oversheath 19 is to be made of the insulating resin pipe with high mechanical properties, and its material is for being bonding agent with synthetic resin, and glass fibre and goods thereof are made the fiberglass reinforced plastics of reinforcing material, i.e. fiberglass.

In the present embodiment, mechanical oversheath 19 is to be two, is installed on the outside of two arms that wrap in the condenser type core body 18 on the U type baffle 16 respectively.

The material of the capacitance plate of condenser type core body 18 is conduction or semiconductive film or metal forming.

In the embodiment shown in fig. 5, mechanical oversheath 19 is to be one, is installed on outside the condenser type core body.

Baffle described in the utility model 16 is conducting rod or conductor wire, and by a circle of its external insulation, or the multiturn of insulation to each other constitutes.And connect at a winding top, terminal block is drawn by both sides, a winding top.

Described condenser type core body 18 adopts traditional condenser type U type structure, and uses the dry type organic composite material as insulation, alternately constitutes with capacitance plate, and wherein organic composite material is that polyethylene or polytetrafluoroethylene film cooperate the silicone oil oil film to form; Capacitance plate is by conductive film or metal forming, or semiconductive film constitutes.Its end screen is drawn ground connection through lead-out wire.

Described full skirt 23 is for being fixed in the silicon rubber external insulation outside the mechanical oversheath 19.

Above-mentioned secondary winding 20 is set in the bottom of condenser type core body 18, in the last screen scope, and is fixed in the wiring casing 21.

Described wiring casing 21 is installed on the bottom of condenser type core body 18, in the last screen scope, and fixed capacity formula core body 18 thereon, mechanical oversheath 19, secondary winding 20 etc. are made waterproof sealing simultaneously.

Claims

1, a kind of Dry Type High Tension Current Transformer, comprise a U type baffle, U type baffle is provided with the condenser type core body outward, the bottom of U type baffle is provided with secondary winding, U type baffle, condenser type core body and secondary winding are installed in the wiring casing, it is characterized in that: described condenser type core body is as insulation by the dry type organic composite material, alternately constitute with capacitance plate, and between U type baffle and condenser type core body, be provided with the insulation isolation structure, this outside that is surrounded by the U type baffle of isolation structure and condenser type core body is provided with mechanical oversheath, is filled with insulating material between mechanical oversheath and electric capacity core body.

2, Dry Type High Tension Current Transformer as claimed in claim 1 is characterized in that: U type baffle shields electric the connection to make equipotential with the internal layer the 0th of electric capacity core body.

3, Dry Type High Tension Current Transformer as claimed in claim 1 is characterized in that: mechanical oversheath is to be made of the insulating resin pipe with high mechanical properties.

4, Dry Type High Tension Current Transformer as claimed in claim 1 is characterized in that: mechanical oversheath is to be installed on respectively outside two arms of the U type baffle that is surrounded by isolation structure and condenser type core body.

5, Dry Type High Tension Current Transformer as claimed in claim 1 is characterized in that: mechanical oversheath is to be installed on outside the U type baffle that is surrounded by isolation structure and condenser type core body.

6, Dry Type High Tension Current Transformer as claimed in claim 1 is characterized in that: the material of the capacitance plate of electric capacity core body is conduction or semiconductive film or metal forming.

7, Dry Type High Tension Current Transformer as claimed in claim 1 is characterized in that: the insulating resin tube material of the high mechanical properties of mechanical oversheath is for being bonding agent with synthetic resin, and glass fibre and goods thereof are made the fiberglass reinforced plastics of reinforcing material.

8, as claim 4 or 5 described Dry Type High Tension Current Transformer, it is characterized in that: the material of mechanical oversheath is for being bonding agent with synthetic resin, and glass fibre and goods thereof are made the fiberglass reinforced plastics of reinforcing material.

9, Dry Type High Tension Current Transformer as claimed in claim 1 is characterized in that: the insulating material of filling between described mechanical oversheath and electric capacity core body is for pouring into and be solidificated in the macromolecular material between mechanical oversheath and electric capacity core body.