Combined mutual inductor for metering and method thereof

Abstract

The invention discloses a combined mutual inductor for metering and a method thereof, the combined mutual inductor comprises a lower bottom box, a hollow protective cover, an upper shell and a mounting support plate, the top end of the upper shell is movably connected with the hollow protective cover, three bulge bulges are embedded in the top end of the upper shell, the top ends of two of the bulge bulges are fixedly provided with insulating terminal columns, and the insulating terminal columns are fixedly connected with the hollow protective cover. And battery core columns are installed at the top ends of the two insulation terminal columns in an embedded mode, one ends of the two battery core columns are connected with insulation wire holders, wiring terminals are installed at one ends of the two insulation wire holders, and an electrostatic insulation column is fixedly installed at the top end of the other bulge protrusion. The single air pump pumps dried and dedusted gas to the branch connecting pipe, and then the gas is conveyed to the surfaces of the voltage transformer and the current transformer through the branch connecting pipe to cool the voltage transformer and the current transformer, and the flowing gas is discharged along the right-angle ventilation pipe to take away heat.

Description

technical field [0001] The invention relates to a combined transformer, in particular to a combined measuring transformer and a method thereof, belonging to the technical field of transformers. Background technique [0002] With the improvement of living standards and the vigorous development of electric power, the application of transformers in life has become more and more extensive. In power applications, the applications of current transformers and voltage transformers are more common. Among them, some circuits are more complicated and are more important for the use of transformers, and some wiring places need multiple sets of transformers to be used together. Therefore, a combined transformer is needed to solve such problems. [0003] Patent No. CN201811431190.7 discloses a combined current and voltage transformer and its manufacturing method. The combined current and voltage transformer includes a casting body, a single voltage transformer and a current coil formed in...

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Problems solved by technology

[0004] Although it can improve the qualification rate of combined transformers, in actual use, there is poor heat dissipation efficiency, and because of the casting method, the connection between the terminals and the high-voltage lines cannot be disconnected, which makes it very inconvenient for internal maintenance and replacement in the later period, and the combination The overall protection effect of the type transformer is not good, and the environmental factors have too much influence on it, which is likely to cause the defect of low service life

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