CN201174529Y

CN201174529Y - Contact box having Rogowski coil

Info

Publication number: CN201174529Y
Application number: CNU2007200917482U
Authority: CN
Inventors: 赵国生; 贾伟; 王帮田
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-04
Filing date: 2007-09-04
Publication date: 2008-12-31
Anticipated expiration: 2017-09-04

Abstract

The utility model discloses a contact box with a Rogowski coil. The contact box is characterized by consisting of a contact box (I), a Rogowski coil (II) arranged inside the contact box and an outgoing terminal (III); the contact box and the Rogowski coil are integrally cast into a whole by epoxy resin; the contact box (I) comprises a wire incoming cylinder (1), a mounting flange (2) and a wire outgoing cylinder (3) which are connected into a whole; the outer side and the inner side of the wire incoming cylinder are respectively provided with an umbrella skirt; the outgoing terminal is arranged on the outer side of the contact box; and the low-voltage outgoing terminal of the Rogowski coil is connected with the outgoing terminal (III).

Description

The contact box that has the Rogowski coil

Technical field

The utility model relates to a kind of high-tension switch cabinet element, is specifically related to a kind of contact box of the Rogowski of having coil.

Background technology

At present, all be equiped with switch and current transformer cashier's office in a shop at high-voltage switch gear, be with contact box at the contact of switch and the junction of bus, installing mode between contact box and the current transformer has two kinds, a kind of is that contact box and current transformer are installed separately, be enclosed within current transformer on the bus and be fixed on the switch cubicle, because national standard all has certain requirement to the creepage distance and the space insulation distance of high-voltage electrical apparatus element, this mounting means can cause current transformer bulky, the increase of heaviness and manufacturing cost, another kind is that current transformer and contact box are cast in one with epoxy resin, this mode can be saved installing space, make overall cost decrease, but since with the requirement of Current Transformer Secondary interface equipment to the current transformer power output, the volume of current transformer can not be done very for a short time, weight can be very not light yet, makes mode yet very difficult popularization the in engineering reality that current transformer and contact box is cast in one with epoxy resin.

Develop rapidly along with the computer and the communication technology, people are also more and more higher to the requirement of panel switches cabinet, digital intelligent panel switches cabinet will become the leading products of following switch cubicle, current transformer in this switch cubicle will not need to provide power output, therefore can adopt the electronic current mutual inductor (being electronics CT) that constitutes by the Rogowski coil to replace, though the Rogowski coil can be done to such an extent that volume is very little, very light in weight, but when this electronics CT installs separately in order to satisfy the requirement of creepage distance and space insulation distance, still need bigger epoxy resin casting volume, cause the increase of its cost and the increase of volume.

Because Rogowski coil (adopting the hollow coil of non magnetic skeleton) can be done to such an extent that volume is very little, if the contact box of itself and switch is done the obvious increase that can't cause the contact box volume after the integral cast together, so promptly reduce integral device investment (reducing required epoxy resin insulation material in a large number), saved installing space simultaneously again.

Summary of the invention

The purpose of this utility model provides a kind of contact box of the Rogowski of having coil, this utility model can reduce installation space and save equipment cost simultaneously, satisfy simultaneously primary element to insulation, moving steady, heat is steady, office puts, creepage distance, industrial frequency withstand voltage, requirement that lightning impulse is withstand voltage.

For achieving the above object, the utility model adopts following technical scheme: a kind of contact box of the Rogowski of having coil, it is characterized in that, it is by contact box (I), be installed on the Rogowski coil (II) in the contact box, outlet terminal (III) is formed, contact box and Rogowski coil are watered by epoxy resin integral and cast from one, contact box (I) is by inlet wire cylinder (1), mounting flange (2), output cylinder (3) connects as one, in the inlet wire cylinder, the outside is respectively equipped with full skirt, outlet terminal is positioned at the contact box outside, and the low pressure leading-out terminal of Rogowski coil is connected on the outlet terminal (III).

This Rogowski coil (II) of contact box that has a Rogowski coil by non magnetic skeleton (4), be wrapped in insulating protective layer on the skeleton (5), the secondary coil (6) and the screen (7) that evenly are wound on the skeleton protective layer form,

This non magnetic skeleton (4) material of Rogowski coil that has the contact box of Rogowski coil adopts fiber or ceramic material to make.

This insulating protective layer on the skeleton (5) that is wrapped in of Rogowski coil that has the contact box of Rogowski coil adopts the insulating paper coiling.

This screen (7) of Rogowski coil that has the contact box of Rogowski coil adopts the metallicity shielding, and shielding material adopts Copper Foil, aluminium foil or tinfoil paper to make.

This its outlet terminal (III) that has the contact box of Rogowski coil is positioned at contact box output cylinder (3) outer wall side bottom.

This Rogowski coil integral cast of contact box that has the Rogowski coil is in the inlet wire cylinder of contact box.

Compared with prior art, the utlity model has following advantage:

1, the utility model is by the contact box integral cast of Rogowski coil and switch being saved the installing space of switch cubicle together, reduces equipment cost, and its can make the switch cubicle miniaturization simultaneously.

2, the contact box that has the Rogowski coil of the present utility model can guarantee simultaneously that contact box and Rogowski coil current instrument transformer satisfy the requirement of primary element to creepage distance, insulation, aspect such as withstand voltage.

3, the contact box that has the Rogowski coil of the present utility model is because very little, the very light in weight of volume of Rogowski coil is significantly increased on volume and weight unlike present contact box.

Description of drawings

Fig. 1 is the structural map that has the contact box of Rogowski coil of the present utility model;

Fig. 2 is the structural map of the Rogowski coil of the contact box that has a Rogowski coil of the present utility model;

Embodiment

The structure of the contact box that has a Rogowski coil of the present utility model is as shown in Figure 1: whole device is by contact box (I), Rogowski coil (II), outlet terminal (III) three parts are formed, contact box (I) is by inlet wire cylinder (1), mounting flange (2), output cylinder (3) connects as one, in the inlet wire cylinder, the outside is respectively equipped with full skirt, be used to increase creepage distance, outlet terminal is positioned at the contact box exterior bottom, the low pressure leading-out terminal of Rogowski coil is connected on the outlet terminal (III), the Rogowski coil waters and casts from the inlet wire cylinder, the contact of car switch is pushed by the inlet wire cylinder, the bus copper bar is inserted by output cylinder, both link by the fixed contact of inside, the Rogowski coil waters with epoxy resin than position, deep and contact box integral body in the inlet wire cylinder interior of contact box and casts from one, and outlet terminal (III) directly connects the circuit board that is installed in the outlet terminal place or is connected with distant place electronic circuit by shielded type cable.

Structure such as Fig. 2 of the Rogowski coil of the contact box of the Rogowski of having coil of the present utility model show: Rogowski coil (II) is by non magnetic skeleton (4); be wrapped in insulating protective layer on the skeleton (5); the secondary coil (6) and the screen (7) that evenly are wound on the skeleton protective layer are formed; non magnetic skeleton (4) material adopts fiber material or ceramic material to make; the temperature characterisitic of this material is better; indeformable; magnetic permeability is approximately permeability of vacuum; on non magnetic skeleton (4), be wound with insulating protective layer (5); the insulation protection layer material is insulating paper or insulating tape; be used to prevent the destruction of wire insulation; secondary coil (6) evenly is wound on the insulating protective layer; to obtain the voltage signal that is directly proportional with the differential of bus current; be surrounded by screen (7) in the outside of secondary coil (6); screen (7) adopts Copper Foil; aluminium foil or tinfoil paper are made; to shield the interference of extraneous electromagnetic field of high frequency, guarantee the accuracy of output signal.

Claims

1, a kind of contact box that has the Rogowski coil, it is characterized in that, it is made up of contact box (I), the Rogowski coil (II), the outlet terminal (III) that are installed in the contact box, contact box and Rogowski coil are watered by epoxy resin integral and cast from one, contact box (I) is connected as one by inlet wire cylinder (1), mounting flange (2), output cylinder (3), inlet wire cylinder medial and lateral are respectively equipped with full skirt, outlet terminal is positioned at the contact box outside, and the low pressure leading-out terminal of Rogowski coil is connected on the outlet terminal (III).

2, a kind of contact box that has the Rogowski coil as claimed in claim 1; it is characterized in that; its Rogowski coil (II) by non magnetic skeleton (4), be wrapped in insulating protective layer on the skeleton (5), the secondary coil (6) and the screen (7) that evenly are wound on the skeleton protective layer form

3, a kind of contact box that has the Rogowski coil as claimed in claim 1 or 2 is characterized in that, non magnetic skeleton (4) material of its Rogowski coil adopts fiber or ceramic material to make.

4, a kind of contact box that has the Rogowski coil as claimed in claim 1 or 2 is characterized in that, the insulating protective layer on the skeleton (5) that is wrapped in of its Rogowski coil adopts the insulating paper coiling.

5 a kind of contact boxs that have the Rogowski coil as claimed in claim 1 or 2 is characterized in that, the screen of its rogowski coil (7) adopts the metal forming shielding, and shielding material adopts Copper Foil, aluminium foil or tinfoil paper.

6, a kind of contact box that has the Rogowski coil as claimed in claim 1 or 2 is characterized in that, its outlet terminal (III) is positioned at contact box output cylinder (3) outer wall side bottom.

7, a kind of contact box that has the Rogowski coil as claimed in claim 1 or 2 is characterized in that, the integral cast of Rogowski coil is in the inlet wire cylinder of contact box.