An isolation seat applied to tap terminals of dry-type transformers

Abstract

The invention discloses an isolation seat applied to the tapping terminal of a dry type transformer. The isolation seat comprises a ceramic base in the shape like a Chinese character ''hui'', a flangeis 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 the flange, each groove of the ceramic base is internally fixedly provided with a seal ring in an inserted connection manner, a limiting plate is formed on the inner side of the ceramic base, a plurality of longitudinal guiding grooves are formed in the limiting plate, the front end face of the limiting plate abuts against positioning sleeves, a connecting sleeve is formed on the rear end face of the positioning sleeve, the connecting sleeves pass through the guiding grooves of the limiting plate, and then are fixedly provided with limiting sleeves in an inserted sleeve manner, a baffle plate is arranged on the front side of the limiting sleeve, a double-screw bolt matched with the tapping terminal of the dry type transformer is formed on the rear end face of the baffle plate, and a threaded hole is formed in the front end face of the baffle plate. According to the 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 moldopening 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 an isolation base applied to 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 environments. Th...

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

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