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Isolating switch in vacuum on-load tap-changer

A technology of on-load tap-off and isolation switch, applied in electrical switches, contacts, electrical components, etc., can solve the problems of large sliding friction and affect the service life of switches, save space and materials, ingenious structural design, and improve reliability. effect on performance and longevity

Active Publication Date: 2014-01-22
SHANGHAI HUAMING POWER EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing isolating switch is a blade and clip type, and the sliding friction is relatively large during the switching process, which affects the service life of the switch

Method used

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  • Isolating switch in vacuum on-load tap-changer
  • Isolating switch in vacuum on-load tap-changer
  • Isolating switch in vacuum on-load tap-changer

Examples

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] see together Figure 2-4 , see mainly figure 2 .

[0026] A disconnecting switch in a vacuum on-load tap changer, including a mounting plate 1, a spring 2, a swing rod 3, and a shift fork 4; the mounting plate 1 is provided with a pair of fixed contacts 1b, a spring swing groove 1c, and a spring 2 One end is fixed to the rotating shaft I1a, and the other end is hinged to the swing rod 3. The spring can swing around the rotating shaft I1a in the spring swing groove 1c; There is a double-sided movable contact 3b, the double-sided movable contact 3b corresponds to the fixed contact 1b; the shift fork 4 can rotate around its axis 4a, and the shift fork 4 is provided with a pair of claws 4b, the pair of claws 4b respectively toggle the corresponding rollers 3a, and the rollers 3a can roll on the contact surface with the claws 4b.

[0027...

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PUM

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Abstract

The invention relates to an isolating switch in a vacuum on-load tap-changer. The isolating switch is characterized by comprising a mounting plate (1), a spring (2), an oscillating bar (3) and a shifting fork (4), wherein a pair of fixed contacts (1b) and a spring oscillating groove (1c) are arranged on the mounting plate; one end of the spring (2) is fixed with a rotating shaft I (1a) while the other end of the spring (2) is hinged with the oscillating bar (3); the spring can oscillate in the spring oscillating groove (1c) around the rotating shaft I (1a); the oscillating bar (3) is hinged with the mounting plate (1); a pair of rollers (3a) are arranged on the mounting plate; a two-sided moving contact (3b) is arranged on one end part of the mounting plate; the double-faced moving contact (3b) is corresponding to the fixed contact (1b); the shifting fork (4) can rotate around the axis (4a); a pair of pushing claws (4b) are arranged on the shifting fork (4); the pair of pushing claws (4b) respectively stir the corresponding rollers (3a); the rollers (3a) can roll on the contact surfaces of the pushing claws (4b).

Description

technical field [0001] The invention relates to an isolating switch, in particular to an isolating switch in a vacuum on-load tap changer, and belongs to the technical field of on-load tap-changers. Background technique [0002] The on-load tap-changer is a special switch used to switch the taps of the primary or secondary windings to adjust the output voltage when the transformer is loaded. Power transformers generally have ±1.25-2.5% voltage-regulating taps. Change the connection of the taps through the tap changer to change the number of turns of the high-voltage coil, thereby adjusting the output voltage of the transformer. [0003] The transition contact of the vacuum on-load tap-changer is borne by the vacuum tube, and the arc is generated and extinguished in the vacuum tube during switching. Compared with the ordinary on-load tap-changer, its reliability is higher and the arc extinguishing is more thorough. It will not pollute the lubricating oil, and the maintenance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/26H01H1/50
Inventor 沈旭
Owner SHANGHAI HUAMING POWER EQUIP CO LTD
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