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Brake opening speed adjusting contactor

A contactor and speed technology, applied in the direction of relays, electromagnetic relays, detailed information of electromagnetic relays, etc., can solve problems such as arc instability, exceeding the insulation level, damage to contactors, etc., and achieve the effect of reducing the interception overvoltage and speeding up the separation

Inactive Publication Date: 2016-12-21
SICHUAN XINGZHI ZHIHUI INTPROP OPERATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the power transmission, a contactor is needed. During the use of the traditional contactor, the closing electromagnet cannot adjust the opening and closing speed according to the magnitude of the breaking current, so as to realize high-speed opening when breaking a large current. Adjust to low-speed opening when breaking small current
In a small current vacuum arc, when the amplitude of the AC current drops to a certain value, the arc presents an unstable phenomenon, and when the current drops further, the current will be cut off, and the current contactor will generate an overvoltage when the circuit is cut off, which is much higher than that of the contactor. If the insulation level of the contactor is damaged, the overvoltage in it needs to be limited and protected

Method used

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  • Brake opening speed adjusting contactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 As shown, the present invention includes a closed case 1, a closing mechanism located inside the closed case 1, a rotating rod 5, an opening spring 2, a contact spring 10, an insulator 15 and a closing electromagnet; the bottom of the opening and closing mechanism is connected to a contact The head spring 10, the bottom of the contact spring 10 is connected to the insulator 9, and one end of the insulator 9 is also connected to the rotating rod 5; a closing magnet is also arranged between the rotating rod 5 and the inner wall of the closed case 1, and the closing magnet includes a plurality of phases Adjacently arranged electromagnet coils 3 and iron cores 17, a plurality of electromagnet coils are installed on the inner wall of the closed shell 1 and a switch 4 is installed on each electromagnet coil 3, and a plurality of iron cores 17 are installed on the rotating rod 5 and opposite to the corresponding electromagnet coil 3; the opening spring 2 is al...

Embodiment 2

[0023] In this embodiment, the following technical features are added on the basis of Embodiment 1: a ground terminal 6 is also provided on the closed case 1 . Introduce part of the voltage inside the closed shell to the ground to further reduce the occurrence of interception overvoltage.

[0024] A switch 4 installed on each electromagnet coil 3 is arranged on the outer wall of the enclosure 1 , and the switch 4 controls a corresponding electromagnet coil 3 . It is convenient to control the number of electromagnetic coils connected through the switch, so as to quickly change the magnetic force.

Embodiment 3

[0026] The preferred specific structure of this embodiment is as follows on the basis of the above embodiments: the inert gas is sulfur hexafluoride gas. Isolation works better.

[0027] The opening and closing mechanism includes a static contact 14, a ceramic shell 18 and a moving contact 11. The static contact 14 is introduced from the top of the ceramic shell 18, and the moving contact 11 is introduced from the bottom of the ceramic shell 18. The static contact 14 and the moving contact There is a gap between the contacts 11 .

[0028] The top of the static contact 14 is also connected to the lead-out copper bar 16, and the bottom of the moving contact 11 is also connected to the soft conduit 8,

[0029] The soft conduit 8 is connected to the lower lead-out copper bar 7 , and the upper lead-out copper bar 16 and the lower lead-out copper bar 7 are also connected to the insulation board 15 .

[0030] The static contact 14 is also connected to the shielding case 13 , and th...

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PUM

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Abstract

The invention discloses a brake opening speed adjusting contactor which comprises a closed shell, an opening and closing mechanism, a rotating rod, a brake opening spring, a contact head spring, an insulating piece and a brake closing electromagnet, wherein the opening and closing mechanism, the rotating rod, the brake opening spring, the contact head spring, the insulating piece and the brake closing electromagnet are positioned in the closed shell; a bottom part of the opening and closing mechanism is connected with the contact head spring, a bottom part of the contact head spring is connected with the insulating piece, one end of the insulating piece is connected with the rotating rod, the brake closing electromagnet is arranged between the rotating rod and an inner wall of the closed shell, the brake closing electromagnet comprises a plurality of adjacently arranged electromagnet wire coils and a plurality of iron cores, the plurality of the electromagnet wire coils are mounted on the inner wall of the closed shell, a switch is mounted on each of electromagnet wire coil, the plurality of iron cores are mounted on the rotating rods and are opposite to corresponding electromagnet wire coils, the brake opening spring is connected between the rotating rod and the inner wall of the closed shell, and the closed shell is filled with inert gases. Via the above structure, the brake closing electromagnet in the brake opening speed adjusting contactor can be used for changing magnitude of magnetic force by adjusting the quantity of connected electromagnet wire coils, opening and closing speed of the brake closing electromagnet can be therefore changed, and cut-off overvoltage protection over the contactor can be realized because the closed shell is filled with the inert gases.

Description

technical field [0001] The invention relates to the field of power contactors, in particular to a contactor capable of adjusting the opening speed. Background technique [0002] Electricity is an energy powered by electric energy. It was invented in the 1870s. The invention and application of electric power set off the second industrialization climax. The level of transmission voltage is the main indicator of the development level of power transmission technology. When using high-voltage electricity, it is usually converted into low-voltage electricity before it can be used. In the power transmission, contactors are needed. During the use of traditional contactors, the closing electromagnet cannot adjust the opening and closing speed according to the magnitude of the breaking current, so as to achieve high-speed opening when breaking large currents. It is adjusted to low-speed opening when breaking a small current. In a small current vacuum arc, when the amplitude of the A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H50/44H01H50/02H01H50/14
Inventor 贺昶明
Owner SICHUAN XINGZHI ZHIHUI INTPROP OPERATION CO LTD
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