Double-station directly-operated switch

Abstract

The invention discloses a double-station directly-operated switch. The double-station directly-operated switch comprises a power device, a pedestal and a directly-operated part which is arranged on the pedestal in a way of sliding leftwards and rightwards, wherein at least one movable end is fixedly arranged on the directly-operated part; each movable end comprises an over-travel spring, a positioning guide seat as well as left and right movable end contacts arranged oppositely; the over-travel spring is pressed between the two movable end contacts; left and right static ends are correspondingly arranged on each movable end; each movable end constructs a contact group together with the left and right static ends which are arranged correspondingly; the static ends are fixed on the pedestal; the movable ends are positioned between the two corresponding static ends; when the movable ends slide leftwards and rightwards along with the directly-operated part, the top ends of the small ends of the movable end contacts are pressed against the static end contacts of the static ends. The double-station directly-operated switch has the advantages of realization of large contact span, direct and reliable transmission, high switching speed, small size and low cost, is suitable for narrow spaces and integrated design of complete set of equipment, and is particularly suitable to be taken as a tap switch inside an oil-immersed transformer.

Description

technical field [0001] The invention relates to the technical field of power devices, in particular to a double-position direct-acting switch, in particular to a linear structure switch adopting a permanent magnet operating mechanism. Background technique [0002] The structure of the on-load tap changer in the prior art is complicated, the volume is large, and the cost is high. It is generally a rotating cage structure, and the transmission mechanism is generally a motor to drive the main shaft to rotate. Arcing occurs, long-term use causes poor contact of contacts, increased impurities in cooling oil, and decreased insulation. It is not suitable for large-scale promotion in 10kV power distribution occasions. [0003] Although the off-excitation voltage regulation (no-load voltage regulation) switch is relatively low in cost, it has some inherent disadvantages: one is that it must be operated in the state of no excitation of the transformer, and it needs a certain power out...

AI Technical Summary

Problems solved by technology

[0002] The structure of the on-load tap changer in the prior art is complicated, the volume is large, and the cost is high. It is generally a rotating cage structure, and the transmission mechanism is generally a motor to drive the main shaft to rotate. Arcing occurs, long-term use will cause poor contact of contacts, increase of impurities in cooling oil, and decrease of insulation, so it is not suitable for large-scale promotion in 10kV power distribution occasions

[0003] Although the off-excitation voltage regulation (no-load voltage regulation) switch is relatively low in cost, it has some inherent disadvantages: one is that it must be operated in the state of no excitation of the transformer, and it needs a certain power outage time to adjust, which interferes with normal production; the other is manual operation. Operation, the number of adjustments is limited, only periodic or seasonal adjustments can be made, and cannot be performed frequently, and the voltage fluctuations caused by daily peak and valley changes cannot be controlled, and the continuity and reliability of power supply cannot be well guaranteed

However, due to the disc-shaped structure of the tap changer, in order to improve the insulation level of the product, the distance between the contacts needs to be increased. To ensure the insulation, the volume of the switch must be increased, and the cost will increase a lot; and the lead wires of the transformer winding need to be connected around the disc-shaped switch. , less efficient

[0005] The existing patent (patent application number: 201310492317.7) provides a fast two-way three-state switching power switch device, which has the advantages of short switching time, small size, and reliable contact, but the transmission parts are more complicated, and the requirements for contact installation are high. The pressure structure is complex and the manufacturing cost is high

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