Interturn insulation detector for dry air reactor

Abstract

The invention discloses an interturn insulation detector for a dry air reactor, which comprises a voltage regulator, a transformer, a high-frequency oscillating module and an oscillograph, wherein voltage of an external power supply is regulated by the voltage regulator and delivered to the transformer; the transformer is connected with the voltage regulator; the delivered voltage is regulated to a range required by the high-frequency oscillating module; the high-frequency oscillating module connected with the transformer is connected with the reactor to be detected; evanescent high-frequency oscillation voltage generated by the high-frequency oscillating module acts on the reactor to be detected; and a wave form of oscillating voltage output by the reactor to be detected is detected by the oscillograph.When the detector is in use, lower voltage is applied across the reactor to be detected first, and a wave form of the low voltage is stored by the oscillograph; then higher voltage is applied across the reactor to be detected for one minute, and an output wave form of the reactor is obtained again; the insulating property of the reactor to be detected can be judged by comparing the obtained wave forms at the two times finally, and the purpose of sensitive detection of interturn insulation deficiencies of the reactor is realized.

Description

technical field [0001] The invention relates to the technical field of reactor detection, and more specifically relates to a dry air reactor turn-to-turn insulation detector. Background technique [0002] Compared with traditional oil-immersed iron-core reactors, dry-air reactors (also known as dry-type air-core reactors) have the advantages of simple structure, light weight, small volume, good linearity, low loss and convenient maintenance. Has been developed rapidly and widely used. [0003] The dry air reactor is composed of multiple coaxial winding envelopes. All packages are electrically connected in parallel, and there are several coils connected in parallel in each package, and each layer of coils has several small-section metal wires wound together, and each wire is wrapped with polyester film or glass filament For turn insulation, each envelope is wrapped with long glass fibers impregnated with epoxy resin. After the reactor is wound, it is heated and solidified,...

AI Technical Summary

Problems solved by technology

Frequency doubling and voltage doubling test has a longer action time and higher energy, but the test voltage is lower, and it is difficult to detect defects in reactors with more turns; lightning impulse test voltage is higher, but the action time is shorter and the energy is lower , it is often difficult to judge whether it is qualified by visual inspection or waveform comparison

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