Transformer on-load capacity regulation switch

Abstract

The invention discloses an on-load capacity-regulating switch for a transformer. The on-load capacity-regulating switch comprises a high-voltage coil switching system, a low-voltage coil switching system, at least one permanent magnet mechanism and a transmission mechanism matched with the permanent magnet mechanism; the high-voltage coil switching system comprises at least three vacuum arc extinguish chambers; the low-voltage coil switching system comprises at least four vacuum arc extinguish chambers; the permanent magnet mechanism reciprocally drives each vacuum arc extinguish chamber to perform switch-off and switch-on actions through the transmission mechanism to further switch the coils of the transformer to realize the purpose of regulating the capacity of the transformer. Through the structural scheme that the high-voltage coil switching system and low-voltage coil switching system formed by the vacuum arc extinguish chambers are driven by the permanent magnet mechanism, the problem in arc extinguish in the high voltage side and the lower voltage side is solved; and the on-load capacity-regulating switch is simple in structure, high in reliability, short in action completion time, long in service life and maintenance-free in lifelong time.

Description

technical field [0001] The invention belongs to the technical field of transformer equipment in the electric power industry, and in particular relates to an on-load capacity regulating switch used on a transformer. Background technique [0002] The on-load capacity regulating transformer is a transformer with two types of rated capacity. According to the size of the load, use a special capacity adjustment switch to switch the connection mode of the transformer winding without cutting off the power supply, and then realize the switch between two different capacities of the transformer. There are two main ways to obtain the size and capacity of the capacity-adjusting transformer: one is that the high-voltage side is realized by D / Y conversion, and the low-voltage side is realized by serial-parallel conversion of coils; the other is that both the high-voltage side and the low-voltage side are realized by serial-parallel conversion of coils to realise. [0003] The capacity re...

AI Technical Summary

Problems solved by technology

[0007] Although this kind of capacity regulating switch solves the problem of reliable arc stop of the high-voltage side contact during the star-angle switching process, the low-voltage side will also produce arcing during the serial-to-parallel conversion process, and the user still needs to regularly check and replace the transformer oil. ; The driving device still uses the electric spring energy storage mechanism, which has many parts, complex structure, high failure rate and difficult maintenance

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