Automatic detecting type outdoor low-voltage metering current transformer

Abstract

The invention provides an automatic detecting type outdoor low-voltage metering current transformer. The automatic detecting type outdoor low-voltage metering current transformer comprises an epoxy resin main body and an annular iron core, wherein the iron core is provided with a secondary winding in a coiled manner; two ends of the secondary winding are connected with secondary wiring terminals; the iron core and the secondary winding are integrally poured through the epoxy resin main body; a terminal seat is arranged on the epoxy resin main body; the secondary wiring terminals are arranged on the terminal seat; an antitheft electric cover is arranged on the terminal seat; the annular iron core is an elliptic ultracrystalline iron core; the secondary winding is coiled at the left side and the right side of the elliptic ultracrystalline iron core; the diameter of a primary bus through hole is 75mm to 85mm. According to the automatic detecting type outdoor low-voltage metering current transformer, a cable equipped with a wiring copper nose can pass through the primary bus through hole, so that the mounting and replacing efficiency can be increased, and the material waste can be reduced; the secondary wiring terminals are positioned on the epoxy resin main body, and the elliptic ultracrystalline iron core structure is adopted, so that the automatic detecting requirement of an automatic detecting system of the low-voltage current transformer can be met, the labor intensity can be reduced, and the detecting efficiency can be increased.

Description

technical field [0001] The invention belongs to the technical field of transformers, in particular to a current transformer. Background technique [0002] The outdoor low-voltage current transformer is a high-precision transformer that is installed on an outdoor bracket, directly passes through the cable, and meets the needs of metering grades under the condition of one turn at a time. Outdoor low-voltage metering bus-type current transformers are usually used in industrial metering, and the rated working voltage is usually 0.66kV. They can be used in conjunction with billing electric energy meters, and the metering is required to be accurate and reliable. At present, the most common outdoor low-voltage metering bus-type current transformer, such as the Chinese utility model patent with the patent number ZL200620136788. There is a junction box, and the outdoor low-voltage metering bus-type current transformer mainly includes an iron core, on which a secondary winding is wou...

AI Technical Summary

Problems solved by technology

At the same time, when the transformer needs to be replaced, it is also necessary to cut the cable to connect the copper nose, and then reinstall the cable to connect the copper nose after replacing the transformer, resulting in a long time for replacement, and a large waste of materials, which is time-consuming and laborious

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