CN200965825Y

CN200965825Y - A novel current mutual-inductor

Info

Publication number: CN200965825Y
Application number: CN 200620130156
Authority: CN
Inventors: 李明; 张永超; 张涤华; 杨术炳; 李名舟
Original assignee: XINYANG XINHU ELECTRICAL APPLIANCE CO Ltd
Current assignee: XINYANG XINHU ELECTRICAL APPLIANCE CO Ltd
Priority date: 2006-10-20
Filing date: 2006-10-20
Publication date: 2007-10-24
Anticipated expiration: 2016-10-20

Abstract

The utility model relates to a novel electric current mutual inductor, comprising a ceramic crust, an epoxy resin insulator which is arranged in the ceramic crust, an iron core which is embedded in the epoxy resin insulator, a secondary winding and disposable windings which wrap over the iron core. An insulated sealing substratum is funneled between the ceramic crust and the epoxy resin insulator; the insulated sealing gum wraps over the epoxy insulator to form an epoxy resin coat in order from the inside to the outside; the insulated sealing substratum and a ceramic crust contact a connector; the insulated sealing substratum is a cable substratum or a glass substratum or a mechanical sealing substratum or a polyester substratum; two disposable windings can be connected with each other in series or in parallel or respectively for utilization according to the actual need. The novel electric current mutual inductor of the utility model connects the ceramic crust, the cable substratum and the epoxy resin (the main insulated) into a combo to avoid condensation, having the advantages of good insulation, ultraviolet radiation fading, safety, and reliability; meanwhile, the utility model is characterized in simple and novel structure, no leakage, bearing foul, small partial discharging and long service life (about twenty years), thus the utility model is an ideal corollary equipment for the supply line of a transformer substation.

Description

The New type of current instrument transformer

One, technical field:

The utility model relates to a kind of instrument transformer, particularly relates to a kind of New type of current instrument transformer.

Two, background technology:

At present, the measurement of making the electric current electric energy in electric power system much uses current transformer.Owing to make the place of Current Transformer more and more, be maintained as very big problem, also to when design, notice whether the two poles of the earth are easy to generate electric arc, in outdoor antiultraviolet, the problem such as ageing-resistant of also should be noted that.The epoxy resin enclosed formula current transformer of plain edition only is suitable for indoor, its insulation system of high-tension current inductor of outdoor use mostly is insulating paper and transformer oil compound inslation, volume is big and heavy, easily leak, pollute, also can breaking out of fire even set off an explosion, can not be directly installed on load center.Patent Office of the People's Republic of China authorized and discloses a kind of " outdoor dry type instrument transformer " (authorizing publication number CN2231447Y) on July 17th, 1996; the insulation protection structure that this instrument transformer has adopted insulator to combine with the ordinary epoxy resin layer; though avoided the leakage of oil of oil immersed type instrument transformer; shortcomings such as oil quality deterioration; but there is the structure more complicated in this instrument transformer; inconvenience is installed; the shortcoming that needs periodic maintenance; the more important thing is that this instrument transformer insulation effect is not fine; in insulator, be easy to generate the condensation phenomenon; under condition of high voltage; only rely on the epoxy resins insulation life-span limited, dangerous hidden danger.31 days October calendar year 2001 of State Intellectual Property Office, a kind of Dry Type High Tension Current Transformer of disclosed application number 00261648.3 disclosed a kind of scheme of dry type mutual inductor, this scheme is done main insulation with the organic insulation film, the parcel solid insulating material is made main insulation on secondary winding and iron core assembling and the secondary lead wires pipe, three electric screens that have length and position to gradually change in the main insulation, they constitute the equal laminated structure of capacitive character jointly.The complex structure of this current transformer, the technological requirement height, difficulty of processing is big.

Three, utility model content:

The utility model is to overcome the deficiency that prior art exists, and designs and produces that a kind of ne-leakage, resistant are dirty, polytropic ratio, measures New type of current instrument transformer flexibly.

Technical scheme:

A kind of New type of current instrument transformer, contain ceramic package, the epoxyresin insulator in the ceramic package is embedded in the iron core in the epoxyresin insulator, and the secondary coil of coiling on the iron core, primary winding, between ceramic package and epoxyresin insulator, be perfused with the insulated enclosure glue-line.

Described New type of current instrument transformer, described electric insulating sealant parcel epoxyresin insulator, constitute and be followed successively by epoxy resin layer from inside to outside, the insulated enclosure glue-line contacts connector with the ceramic package layer, the insulated enclosure glue-line is the cable glue-line, or be the glass glue-line, or be the mechanical seal glue-line, or be the polyester glue-line.

Described New type of current instrument transformer, the iron core that is embedded in the epoxyresin insulator is divided into three layers from top to bottom, is provided with the insulation interlayer between the adjacent two layers iron core.

Described New type of current instrument transformer, secondary coil of coiling constitutes three iron cores, three-winding on each iron core; Two primary windings independent of each other are wound on respectively on three iron cores simultaneously.

The use of connecting according to actual needs of described New type of current instrument transformer, two primary windings, or in parallel the use, or use separately respectively.

Described New type of current instrument transformer, ceramic package cross section be circular or holder circular, be provided with the ring-like cluster parachute of some at the ceramic package outer surface, epoxyresin insulator and cable gum are installed or perfusion with the ceramic package coupling respectively.

The beneficial effects of the utility model:

1, New type of current instrument transformer of the present utility model is connected as a single entity ceramic package, cable gum and epoxy resin (main insulation), avoids producing the condensation phenomenon, and insulation effect is good, and antiultraviolet is safe and reliable.

2, New type of current instrument transformer of the present utility model is fit to the new product that city net, the supporting needs of rural power grids miniaturization transformer station also can improve the electric energy metrical precision, is the improvement on similar current transformer basis, has improved technical parameter, especially the dynamic and thermal stability electric current.

3, New type of current instrument transformer of the present utility model meets GB1208-1997 " current transformer " national standard and the requirement of IEC185 international standard.

4, New type of current instrument transformer of the present utility model, novelty simple in structure has ne-leakage, resistant is dirty, and office puts little, and long service life characteristics such as (about 20 years) are desirable corollary equipments of supply line of transformer station.

Four, description of drawings:

Fig. 1: New type of current instrument transformer cross-sectional view;

Fig. 2: New type of current instrument transformer surface structure schematic diagram;

Fig. 3-1: two primary connection posts of New type of current instrument transformer cascaded structure schematic diagram;

Fig. 3-2: be the physical circuit annexation of Fig. 3-1;

Fig. 4-1: two primary connection posts of New type of current instrument transformer parallel-connection structure schematic diagram;

Fig. 4-2: be the physical circuit annexation of Fig. 4-1;

Fig. 5-1: two primary connection posts of New type of current instrument transformer use structural representation respectively separately;

Fig. 5-2: be the physical circuit annexation of Fig. 5-1.

Five, specific embodiments:

Embodiment one: referring to Fig. 1, Fig. 2, Fig. 3-1, Fig. 3-2, ceramic package 1 cross section is circular, epoxyresin insulator 3 is installed in the ceramic package 1, between ceramic package 1 and epoxyresin insulator 3, be perfused with cable gum insulating barrier 2, cable gum 2 wraps up epoxyresin insulator 3 fully, constitute and be followed successively by epoxy resin layer 3, cable glue-line 2 and ceramic package layer 1 rigid connector from inside to outside; The iron core 4 that is embedded in the epoxyresin insulator 3 is divided into three layers from top to bottom, is provided with insulation interlayer 11 between the adjacent two layers, and secondary coil 5 of coiling constitutes three iron cores, three-winding on each iron core 4; Two circles primary winding independent of each other is wound on respectively on three iron cores 4 simultaneously, and two primary windings are connected in series mutually.

Embodiment two: referring to Fig. 4-1, Fig. 4-2, number identically with embodiment one, same meaning does not repeat, and different is: two primary winding connections parallel with one another.

Embodiment three: referring to Fig. 5-1, Fig. 5-2, number identically with embodiment one, same meaning does not repeat, and different is: two primary windings do not have annexation, independent respectively the use.

Claims

1, a kind of New type of current instrument transformer, contain ceramic package, epoxyresin insulator in the ceramic package, be embedded in the iron core in the epoxyresin insulator, and the secondary coil of coiling on the iron core, primary winding, it is characterized in that: between ceramic package and epoxyresin insulator, be perfused with the insulated enclosure glue-line.

2, New type of current instrument transformer according to claim 1, it is characterized in that: described electric insulating sealant parcel epoxyresin insulator, constitute and be followed successively by epoxy resin layer from inside to outside, the insulated enclosure glue-line contacts connector with the ceramic package layer, the insulated enclosure glue-line is the cable glue-line, or be the glass glue-line, or be the mechanical seal glue-line, or be the polyester glue-line.

3, New type of current instrument transformer according to claim 1 is characterized in that: the iron core that is embedded in the epoxyresin insulator is divided into three layers from top to bottom, is provided with the insulation interlayer between the adjacent two layers iron core.

4, according to claim 1 or 3 described New type of current instrument transformers, it is characterized in that: secondary coil of coiling on each iron core constitutes three iron cores, three-winding; Two primary windings independent of each other are wound on respectively on three iron cores simultaneously.

5, according to claim 1 or 3 described New type of current instrument transformers, it is characterized in that: the use of connecting according to actual needs of two primary windings, or in parallel the use, or use separately respectively.

6, New type of current instrument transformer according to claim 1, it is characterized in that: the ceramic package cross section is circular or holder circle, be provided with the ring-like cluster parachute of some at the ceramic package outer surface, epoxyresin insulator and cable gum are installed or perfusion with the ceramic package coupling respectively.