Outdoor totally-enclosed composite insulation three-phase combined mutual inductor

A combined transformer and composite insulation technology, applied in the field of transformers, can solve problems such as increased labor and equipment costs, difficulty in professional recycling, and low volatility, so as to reduce the workload of inspection and maintenance, and facilitate daily maintenance. The effect of structural fit
CN110828112AActive Publication Date: 2020-02-21湖南大北互互感器有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
湖南大北互互感器有限公司
Publication Date
2020-02-21

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Abstract

The invention discloses an outdoor totally-enclosed composite insulation three-phase combined transformer. The transformer comprises three single-phase combined transformers of the same structure anda base, the three single-phase combined transformers are arranged to be a phase A, a phase B and a phase C respectively and evenly arranged on the base, and a junction box and a low-voltage terminal of a high-voltage primary coil are correspondingly arranged on the two sides of the lower portion of each single-phase combined transformer; the low-voltage terminals of the three single-phase combinedtransformers are connected through a line bank, the line bank is connected with a grounding terminal strip, and the grounding terminal strip is connected with a grounding terminal on the base. The three-phase combined transformer is compact in structure, excellent in layout, accurate in metering and stable and reliable in performance, the outdoor complex operation environment is fully considered,the current part can achieve three transformation ratios, the voltage part can achieve voltage conversion from 15 kV to 20 kV according to different requirements of users, installation is convenient,pollution flashover resistance is achieved, maintenance is avoided, the self-cleaning performance is high, electricity larceny prevention is reliable, and the operation life is long.
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Description

technical field

[0001] The invention relates to a transformer, in particular to a 15-20kV outdoor fully enclosed composite insulated three-phase combined transformer. Background technique

[0002] At present, there are few three-phase outdoor combined transformers with a rated voltage of 15-20kV for domestic power system applications, and their product technology is not mature enough to be suitable for use in areas above 3000 meters above sea level. For example, patent 201811637129.8 discloses a three-phase four-wire combined transformer. This product adopts the technical scheme of combining three independent current transformers and one voltage transformer. According to the analysis, there are the following problems: the structure of the whole machine is complex, and such The huge combined structure, once the equipment is damaged or fails, all the transformers need to be removed before maintenance and replacement, which brings inconvenience to daily maintenance and overhaul...

Claims

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