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Permanent-magnetic driven low-voltage air switch with manual breaker

A permanent magnet drive, air switch technology, applied to the power device inside the switch, protection switch operation/release mechanism, etc., can solve the problems of affecting fault maintenance, low breaking capacity, high power consumption of closing coil, etc. Easy maintenance, convenient fault maintenance, strong breaking ability

Inactive Publication Date: 2007-08-29
李干伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing low-voltage air switch uses a spring operating mechanism for opening and closing operations, but the spring operating mechanism has many parts, high processing precision, complicated production process, and difficult to guarantee product reliability, so it cannot be used in frequent action occasions
Another kind of low-voltage AC contactor as an electromagnetic operating mechanism is simple in structure but heavy, and the closing coil consumes a lot of power. limited range
The applicant once applied for a permanent magnet drive air switch with a manual opening structure. It is used in remote control, online, network microcomputer and automatic detection of fault disconnection, closing and reclosing actions. If the line is disconnected, mechanical failure, or coil damage , the air switch cannot be opened, which affects the maintenance of the fault

Method used

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  • Permanent-magnetic driven low-voltage air switch with manual breaker

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Embodiment Construction

[0009] The present invention will be further described in detail below in conjunction with the embodiments and with reference to the accompanying drawings: Referring to Figure 1, the air switch operated solely by hand or electric in the prior art is improved to open and close by hand and the permanent magnet mechanism 9 drives to open and close. When switching on, the working current passes through the incoming terminal 1, the static contact 3, the iron grid 2, the movable contact 4 to the primary line 12, and then to the outlet terminal 13, where the closing coil 17 in the permanent magnet mechanism 9 passes The closing current generates an induced magnetic field, which pushes the moving iron core 8 outwards, so that the extended end of the moving iron core 8 extends to the longest, the closing coil current disappears, and the closing is in a permanent magnet holding state. When the opening coil 18 passes the opening current, the movable iron core 8 shrinks (as shown in Figures 1...

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Abstract

This invention relates to a magnet driven low pressure air switch with manual braking, in which, a leading-in terminal is connected with a static contactor, the static contactor and a moving contactor are set in an arc suppressing chamber, a primary wire is connected with the moving contactor and a leading-out terminal, the frame of the moving contactor is connected with the extension end of a moving iron core of the magnet unit by a connection bar, the magnet unit and the moving contactor frame are fixed on a localizing frame, a connection terminal of a magnet unit is connected with a control circuit, the other end of a spanner extending out of the shell of a dissociating end is fixed on the frame, which is used in on-line protection control, automatic test of electric faults and remote close and automatic braking in the distribution system.

Description

Technical field [0001] The invention relates to a low-voltage air switch which is opened and closed by manual opening and permanent magnet driving. Background technique [0002] The existing low-pressure air switch uses a spring operating mechanism for opening and closing operations, but the spring operating mechanism has many parts, high processing accuracy, complex production technology, and difficult product reliability to ensure that it cannot be used in frequent operations. Another low-voltage AC contactor as an electromagnetic operating mechanism is simple in structure but cumbersome. The closing coil consumes a lot of power. The contacts of the moving and static contacts are easy to burn out, and the breaking capacity is low. It cannot automatically detect the disconnection of electrical faults. The scope is limited. The applicant has applied for a permanent magnet-driven air switch with a manual opening structure, which is used in remote, online, network microcomputer and...

Claims

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Application Information

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IPC IPC(8): H01H3/28H01H71/10H01H71/70
Inventor 李乾伟
Owner 李干伟
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