Sihui Sf6 Gas Insulated Transformer

一、Profile of products

The current transformers match 35~1000kV high voltage switchgears are including the current transformers for outdoor of busbar going through with the stainless steel or aluminium cases, secondary windings with the insulating material wound, casted by epoxy resin with the flanges, installed with the enclosures and so on. The shapes, dimensions, technical parameters and service environments can be designed according to the requirements of the clients.

Surface: There are different kinds of the current transformers for GIS according to the requirements of the clients, the the surface of the current transformers which used in SF6 gas are wound by insulating tap, casted by epoxy resin or casted with the flanges by epoxy resin; the the surface of the current transformers which used in air are casted by indoor or outdoor epoxy resin, printing after casted by epoxy resin, or closed by the metal enclosures.

The current transformers which used in SF6 gas are manufactured in the constant temperature, humidity and clean room, then dry and vacuum, the moisture contained is very low, they can be used inside the pressure vessel of GIS directly without dry by the clients; they are very clear and can match the cleaning requirement of the GIS.

There is good aging resistivity for the current transformers which casted by indoor or outdoor epoxy resin or printing after casted by epoxy resin used in the air.

There is good agglutinate strength of metal and secondary windings which joined by epoxy resin for the current transformers which closed by the metal enclosures, the protection degree can reach IP66, and there is the function of preventing condensation for the secondary termanils box.

Protection of products: The current transformers which used in SF6 gas should be packed by vacuum to prevent moisture, and be cushioned to prevent damnify during transportation.

The current transformers which used in the air should be packed by the plasic film to prevent moisture, and be cushioned to prevent damnify during transportation. 

二、Technical parameters

The other technical parameters please see table 1.

Note: These are the routine parameters in the above table, if there is any different parameters required, we can design according to the technical parameters of the clients.

三、Service conditions

1. Ambient air temperature: -60 ~ 80℃.
2. Altitude: ≤3000 m.
3. Service environments: it can be used in the air, vacuum, SF6, or oil.
4. The average relative humidity in a month: ≤90 %.
5. There have to be no gas that may seriously affect the insulation and conductive ability of electric equipment, steam, ash, salt, chemical deposit, pollution and corrosive or explosive material.

Drawing 1   CTs for GIS (casted with the flanges) outline and installation dimensions

Table 1   Dimensions of drawing 1

Note: These are the routine dimensions in the above table, if there is any different dimensions required, we can design according to the the clients.

 Drawing 2   CTs for GIS (casted by epoxy resin with flanges) outline and installation dimensions

Table 2   Dimensions of drawing 2

Note: These are the routine dimensions in the above table, if there is any different dimensions required, we can design according to the the clients.

 Drawing 3   CTs for GIS (closed by the metal enclosures) outline and installation dimensions

Table 3   Dimensions of drawing 3

Note: These are the routine dimensions in the above table, if there is any different dimensions required, we can design according to the the clients.