A high voltage transformer

Abstract

The invention discloses a high-voltage instrument transformer, which comprises an outer insulating porcelain sleeve, an expander shell, a corrugated expander, a sealing plate, first insulating sealingsleeves, second insulating sealing sleeves, a primary winding, a primary wiring terminal, secondary windings, a detection box, a sealing cover, a fixing plate, secondary detection terminals, limitingblocks, springs, connecting flanges, sealing flanges, leakage-proof bases, upper covers, levers, floating blocks, ejecting blocks, micro switches, indicator lights and supporting feet. The primary winding is sealed through the first insulating sealing sleeves and the second insulating sealing sleeves, oil leakage can be prevented, insulating oil in the outer insulating porcelain sleeve can be prevented from leaking into the leakage-proof bases, and abnormality of the instrument transformer is prevented. After the sealing cover is dismounted, the two secondary detection ends pop out, and a user can conveniently carry out testing or wiring. The defect that the secondary wiring terminals of a traditional instrument transformer retract into the shell to cause difficulty in wiring is overcome.

Description

technical field [0001] The invention relates to a transformer, in particular to a high-voltage transformer, and belongs to the technical field of transformers. Background technique [0002] High-voltage transformers are transformers suitable for converting large voltages into small voltages or converting large currents into small currents in 1kv to 220kv power systems for easy measurement, protection, and use. Transformers are also called instrument transformers. A general term for voltage transformers and voltage transformers. It can change high voltage into low voltage and high current into small current for measurement or protection system. Its function is mainly to convert high voltage or high current into standard low voltage (100V) or standard small current (5A or 1A, both refer to rated value) in proportion, so as to realize the standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment. change. At the same ti...

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Problems solved by technology

[0003] The oil-paper insulated current transformer is a type of transformer, and the vertical form is a branch of it. The oil-paper insulated current transformer of the vertical form is relatively easy to leak oil during use, and requires frequent maintenance. The maintenance work is cumbersome and the maintenance content It is mainly to check whether the insulating oil leaks and whether the insulating oil is lower than the standard value. Since it does not have the function of prompting oil leakage, it is dangerous during use

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