Linked linear voltage regulation non-excitation tap switch

Abstract

The invention relates to a linked linear voltage regulation non-excitation tap switch for a transformer, which is characterized in that: each phase corresponding to the switch is provided with two layers of static contacts; one layer of the two layers of static contacts of each phase is provided with static contacts of an upper voltage regulation tap of a linked voltage regulation coil and static contacts of a midpoint tap, and the two kinds of static contacts of the taps are distributed mutually at intervals; the other layer is provided with static contacts of a lower voltage regulation tap of the linked voltage regulation coil and static contacts of an output tap, and the two kinds of static contacts of the taps are distributed mutually at intervals; two adjacent static contacts form a tap position, and the tap positions are distributed along the circumferential direction in reduced progressively sequence from large to small; and only one maximum tap position in one layer of the two layers of static contacts set in each phase corresponds to a maximum tap position in the other layer. The tap switch is simple and compact in structure and reasonable in setting, achieves multi-tap linear voltage regulation by using less voltage regulation coil taps, is convenient to operate, has no short connected tap position and high working reliability, and is small in volume to greatly simplify the transformer structure and reduce manufacturing cost and use cost.

Description

technical field [0001] The invention relates to a linkage linear voltage regulation non-excitation tap changer for a transformer. Background technique [0002] In the Chinese patent CN2468142Y, a non-excitation linear pressure regulating drum tap changer is disclosed. It is to set the output contact between two adjacent tap taps of each phase, and use the moving contact to bridge the position of each gear. Tap taps and output taps are used to realize linear voltage regulation, and the structure is relatively simple. The coil taps of each phase correspond to one phase contact layer of the switch, that is, the single, two, and three-phase are respectively one, two, and three-layer contacts. The wiring principle between the contacts of each layer of the three-phase is completely consistent with the voltage regulation sequence. , the output contact is connected to the phase or out-of-phase coil according to the needs, but this structure has a great potential for accidents, that...

AI Technical Summary

Problems solved by technology

The coil taps of each phase correspond to one phase contact layer of the switch, that is, the single, two, and three-phase are respectively one, two, and three-layer contacts. The wiring principle between the contacts of each layer of the three-phase is completely consistent with the voltage regulation sequence. , the output contact is connected to the phase or out-of-phase coil according to the needs, but this structure has a great potential for accidents, that is, when the moving contact stays in the 1-2 or 3-4 tap due to misoperation, the transformer coil There will be a short circuit accident

In addition, when the switch has many voltage regulation positions, more static contacts need to be configured. The large distribution of static contacts will also increase the diameter of the switch, which is not conducive to the layout of the switch in the transformer and material-saving design, and the cost of the transformer will also increase. high

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