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Arc extinguishing mixed transfer switch and switch transferring method

A hybrid switching and arc extinguishing technology, applied in electrical switches, electrical components, circuits, etc., can solve the problems of high cost of thyristor products, short circuit of mechanical switches, loss of competitiveness, etc. Effect

Inactive Publication Date: 2011-01-26
ASCO POWER TECH LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Simply using thyristors in parallel with mechanical switches can meet some of the above requirements, but it is only suitable for low power applications
When the switch is used in ATS occasions such as 63A, 230A, 3kA and 4kA, the high power requirement of the thyristor makes the product cost very high, and there are few suppliers who provide products, so this design is popular in the market. lose competitiveness
At the same time, when the thyristor has a short-circuit fault, the power supply will directly supply power to the load through the thyristor branch, and the mechanical switch will be short-circuited.
Even switching the mechanical switch at this time will have no effect, posing a threat to the load

Method used

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  • Arc extinguishing mixed transfer switch and switch transferring method
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  • Arc extinguishing mixed transfer switch and switch transferring method

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Embodiment Construction

[0037] Please refer to figure 1 , the arc extinguishing hybrid switch of an embodiment includes a mechanical switch S, a first thyristor branch connected in parallel to the first contact branch P1 of the mechanical switch, and a second contact branch P2 connected in parallel to the mechanical switch on the second thyristor branch. The first thyristor branch includes a first triac unit G1 and a first non-polar capacitor C1 connected in series. The second thyristor branch includes a second triac unit G2 and a second non-polar capacitor C2 connected in series. The first and second bidirectional thyristor units may be one bidirectional thyristor or two thyristors connected in reverse parallel. in as figure 1 In the ATS application shown, the first contact branch P1 of the mechanical switch is coupled to the normal power supply A, the second contact branch P2 of the mechanical switch is coupled to the emergency power supply B, and the mechanical switch is at the first contact. ...

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PUM

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Abstract

The invention discloses an arc extinguishing mixed transfer switch which comprises a mechanical switch and a first thyristor branch circuit, wherein the first thyristor branch circuit is connected in parallel with a first contact point branch circuit of the mechanical switch; and the first thyristor branch circuit comprises a first bidirectional thyristor unit and a first non-polarity capacitor connected in series. The invention also discloses a switch mixed transferring method for arc extinguishing of the mechanical switch. Because the first non-polarity capacitor is arranged, a low-powered thyristor can be selected, thereby greatly reducing the cost of the thyristor; and simultaneously, when the thyristor has a short circuit fault, the first non-polarity capacitor can substitute the thyristor to play the arc extinguishing affect, thereby greatly decreasing load current and reducing the influence of the thyristor fault on load.

Description

technical field [0001] The invention relates to a power electronic device that can be installed on an automatic transfer switch (ATS) widely used in industry, in particular to a hybrid switch and switch that uses low-cost low-power thyristors and non-polar capacitors to extinguish arcs for high-power mechanical switches Switch method. Background technique [0002] An automatic transfer switch (ATS) is widely used in various occasions and is an electrical appliance that converts one or several load circuits from one power source to another. However, because its main switching component is a mechanical switch, it has the disadvantages of slow switching speed (about 20ms) and easy arcing. Among them, the arc that occurs when the mechanical switch is switched will generate high temperature, burn and evaporate the metal contacts of the mechanical switch, and greatly shorten the service life of the switch. [0003] A static transfer switch (STS) is also widely used in various oc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/04H01H9/30
Inventor 法兰克·赫德特桑子夏武志贤
Owner ASCO POWER TECH LP
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