Mains supply transformer with short circuit protection function

Abstract

The invention discloses a mains supply transformer with a short circuit protection function, which comprises a transformer main body, a box body is arranged at the upper part of the transformer main body, a partition plate is arranged in the box body, and the partition plate divides the inner cavity of the box body into a wire inlet bin and a wire outlet bin; the wire inlet bin is provided with three wire inlet guide columns which are correspondingly and electrically connected with three phases of the wire inlet side of the transformer main body, and the wire inlet guide columns are electrically connected with a low-voltage side wire through a short-circuit protection mechanism; and the wire outlet bin is provided with three wire outlet guide columns which are correspondingly and electrically connected with three phases of the wire outlet side of the transformer body, and the wire outlet guide columns are electrically connected with a high-voltage side wire through a short-circuit protection mechanism. When each phase of the transformer is short-circuited, an open circuit can be realized, the transformer is prevented from being burnt out, and a fuse in the short-circuit protection mechanism is convenient to mount, is firmly fixed and can be prevented from shaking; and in addition, both the wire inlet bin and the wire outlet bin are filled with SF6 gas, so that excellent arc extinguishing performance is achieved.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a transformer for city power supply with a short-circuit protection function. Background technique [0002] As we all know, a transformer is composed of an iron core (or magnetic core) and a coil. The coil has two or more windings. The winding connected to the power supply is called the primary coil, and the remaining windings are called the secondary coil. It uses the principle of electromagnetic induction A device for changing the alternating voltage. When the transformer suffers a sudden short circuit, both the high and low voltage sides will be subject to a large short circuit current, which will cause damage to the transformer. Therefore, the distribution transformer usually installs fuses on the high and low voltage sides. It is troublesome to install and fix the fuses. Cannot be firmly fixed. Contents of the invention [0003] The technical problem to be solved by...

AI Technical Summary

Problems solved by technology

When the transformer suffers from a sudden short circuit, both the high and low voltage sides will be subject to a large short circuit current, which will cause damage to the transformer. Therefore, the distribution transformer usually installs fuses on the high and low voltage sides. It is troublesome to install and fix the fuses. not securely fixed

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