A detachable insulating and isolating seat on a tap terminal of a dry-type transformer

Abstract

The invention discloses a dismountable insulated isolation seat on the tapping terminal of a dry type transformer. The dismountable insulated isolation seat comprises a ceramic base in the shape likea Chinese character ''hui'', a flange is arranged at the lower end of the ceramic base, a plurality of grooves in the shapes like the Chinese character ''hui'' are formed in the bottom surface of theflange, each groove of the ceramic base is internally fixedly provided with a seal ring in an inserted connection manner, the ceramic base is internally provided with two positioning strips, two endsof the positioning strips are formed on the inner wall of the ceramic base, positioning holes are formed in two ends of the positioning strips, T-shaped column sleeves are arranged inside the diagonally opposite positioning holes in the two positioning strips in the inserted connection manner respectively, a cone-shaped lock sleeve is formed in the front end of each column sleeve, the front end face, exposed out of the corresponding positioning strip, of each lock sleeve is in screw joint with a thread sleeve, a plurality of cutting grooves are formed in each lock sleeve, and the cutting grooves are used for cutting the lock sleeves to form a plurality of circular arc pieces. According to the dismountable insulated isolation seat, mounting and dismounting on a transformer shell are realized conveniently, the shape of the transformer shell does not need to be changed, and mold opening is also not needed, so that the cost is saved.

Description

Technical field: [0001] The invention relates to the technical field of transformers, in particular to a detachable insulating and isolating seat on tap terminals of dry-type transformers. Background technique: [0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Traditional transformers can be divided into oil-immersed transformers, fully sealed transformers, combined transformers and dry-type transformers. For the small-capacity, high-voltage casting transformers with tap terminals currently on the market, the high-voltage outlet terminals and high-voltage tap terminals are generally placed on both sides of the transformer coil. The safety distance of terminals and transformers is also required to be relatively large. [0003] When the performance of insulating materials is degraded, it is affected by external factors such as weather, such as high air humidity, successive cloudy and mildewy rainy seasons, and humid...

AI Technical Summary

Problems solved by technology

However, the distance between the high-voltage terminal and the high-voltage tap terminal along the surface of the object in the small-capacity high-voltage dry-type transformer with tap terminals in the prior art does not meet this minimum standard

Therefore, it is proposed to form a rectangular insulating wall outside the tap terminal of the dry-type transformer to increase the creepage distance, and form an abrupt insulating wall structure on the outer wall of the transformer shell, which requires the transformer shell to be molded again, which increases the manufacturing cost. Moreover, the previous transformer housing could not use this technology

Images