CN202434328U

CN202434328U - Shell structure of current transformer arranged in switch cabinet

Info

Publication number: CN202434328U
Application number: CN2011205491872U
Authority: CN
Inventors: 国世峥; 张交锁; 王家耀; 周建光
Original assignee: SHENYANG HUADE HIGH-TECH ELECTRIC Co Ltd
Current assignee: SHENYANG HUADE HIGH-TECH ELECTRIC Co Ltd
Priority date: 2011-12-26
Filing date: 2011-12-26
Publication date: 2012-09-12
Anticipated expiration: 2021-12-26

Abstract

The utility model discloses a shell structure of a current transformer arranged in a switch cabinet. The defects that high difficulty is caused for a user in on-site construction because the traditional current transformer is located outside an air box; the manufacturing cost is high; three surfaces at the bottom of the primary side of the shell of the current transformer arranged in the switch cabinet are provided with full skirts or stand skirts; and the problem that air leakage is easily caused on the switch cabinet because corresponding mounting holes need to be additionally arranged in a panel of a cabinet body besides a pressure-relief passage serving as a mounting hole is overcome. The shell structure is characterized in that six surfaces of an epoxy resin shell are all planes, and four edge angles of the epoxy resin shell as well as the front surface, the rear surface, the left surface, the right surface and the bottom surface of the epoxy resin shell are all in transitional connection. The shell structure has the beneficial effects that the shell structure is also very convenient for factorized assembly due to the removal of the full skirts or the stand skirts; and particularly, the current transformer can be stably mounted by only using the pressure-relief passage as the mounting hole, instead of additionally providing the corresponding mounting holes in the panel of the cabinet body, and thus the air leakage risk of the switch cabinet is reduced, and the whole insulating strength of the switch cabinet is ensured.

Description

A kind of current transformer casing structure that places in the switch cubicle

Technical field

The utility model belongs to high voltage electrical apparatus technical field, particularly is used to charge into a kind of current transformer casing structure that places in the switch cubicle of 0.1～0.2MPa air pressure dry air or nitrogen.

Background technology

Characteristics of C-GIS (cabinet type gas-insulated metal-enclosed switchgear) product are that the inner the blowing pressure of gas tank is lower, if current transformer is installed in the gas tank, external insulation and phase insulation are difficult to guarantee; Cause alternate easily or primary connection and secondary coil turn-to-turn insulation failure, especially voltage levels especially like this, therefore; The current transformer of C-GIS product of the prior art generally adopts the low-pressure type current transformer, is positioned at the gas tank outside, directly is sleeved on cable; Because the general secondary coil that requires is more on the engineering, output capacity is bigger, and the overall dimension of current transformer receives the restriction of mould again; Usually need a current transformer be divided into 2～3, current transformer provides the secondary output capacity to be generally less than 10VA, during on-the-spot the installation; Need earlier these current transformers to be enclosed within on the cable, carry out the making and the installation of cable termination again, very inconvenient; User's site operation difficulty is bigger, and cost of manufacture is higher.In order to address the above problem, also have in the prior art current transformer is placed the structural design in the switch cubicle, like the current transformer in the switch cubicle that places of Switzerland ABB AB production; Full skirt or upright skirt have been worn in this current transformer square shell primary side bottom three; Because the existence and the space in the cabinet of full skirt or upright skirt are less, in order to be installed in the cabinet and the wiring of primary side with current transformer is stable, except being the installing hole with pressure release passage; Also need on the cabinet panel, offer corresponding installing hole in addition; So just cause switch cubicle gas leakage easily, switch cubicle integral insulation intensity is reduced, influence the security performance of switch cubicle; And what charge in its product switch cubicle is sulfur hexafluoride gas, also can cause environmental pollution.

Summary of the invention

The utility model technical problem to be solved is; Overcome the weak point that prior art exists; Provide only is installing hole with the pressure release passage; Need on the cabinet panel, not offer the corresponding mounting hole more in addition, just can realize the stable a kind of current transformer casing structure that places in the switch cubicle of installing of current transformer.

The technical scheme that the utility model is taked comprises epoxy package; Said epoxy package is a hexahedron; Six faces of said epoxy package are the plane; Four corner angle of epoxy package and the front of epoxy package, at the back, the left side is round-corner transition with the right side and bottom surface and is connected, cast primary connection terminal on the base plane of epoxy package, cast secondary connection terminal and seal groove and threaded mounting hole on the top plan of epoxy package.

Compared with prior art, the beneficial effect of the utility model is that the current transformer contour structures through optimizing can use 0.1～0.2MPaIn the dry air of air pressure or the nitrogen gas insulation environment, replace being installed in the gas tank outer cover and be connected on the low-pressure type current transformer on the cable one time, not only increased single the secondary coil quantity that current transformer is interior; The secondary output capacity also is greatly improved, and has reduced the quantity and the mould input of current transformer, has reduced manufacturing cost; Realized current transformer batch production assembling, the installment work of having saved on-the-spot current transformer, simultaneously; Owing to cancelled full skirt or upright skirt; Also very convenient during the batch production assembling, particularly only be the stable installation that installing hole can be realized current transformer with the pressure release passage, need on the cabinet panel, not offer corresponding installing hole more in addition; Reduce switch cubicle gas leakage risk, guaranteed switch cubicle integral insulation intensity.

Description of drawings

Fig. 1 is the stereogram of the utility model,

Fig. 2 is the front view of the utility model,

Fig. 3 is the vertical view of Fig. 2,

Fig. 4 is the upward view of Fig. 2.

Among the figure:

1. epoxy package,

2. secondary connection terminal,

3. seal groove,

4. primary connection terminal,

5. threaded mounting hole.

Embodiment

Shown in accompanying drawing; The technical scheme that the utility model is taked comprises epoxy package 1; Said epoxy package 1 is a hexahedron; Six faces of epoxy package 1 are the plane; Four corner angle of epoxy package 1 and the front of epoxy package 1, at the back, the left side is round-corner transition with the right side and bottom surface and is connected, cast primary connection terminal 4 on the base plane of epoxy package 1, cast secondary connection terminal 2 and seal groove 3 and threaded mounting hole 5 on the top plan of epoxy package 1.

During use, placing in the switch cubicle this use is novel, is installing hole with the pressure release passage of switch cubicle, through threaded mounting hole 5 the utility model is fixed on the gas tank, can realize the stable installation of current transformer and the wiring of primary connection terminal.

Claims

1. one kind places the current transformer casing structure in the switch cubicle; Comprise epoxy package (1); Said epoxy package (1) is a hexahedron; It is characterized in that six faces of said epoxy package (1) are the plane, four corner angle of epoxy package (1) and the front of epoxy package (1), at the back, the left side is round-corner transition with the right side and bottom surface and is connected; Cast primary connection terminal (4) on the base plane of epoxy package (1), cast secondary connection terminal (2) and seal groove (3) and threaded mounting hole (5) on the top plan of epoxy package (1).