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Surge protection device

A protection device, surge technology, applied in emergency protection circuit devices, circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve problems such as cost increase, and achieve the effect of reducing complexity

Active Publication Date: 2014-05-21
WISTRON NEWEB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of complex logic gates will still increase the cost

Method used

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Embodiment Construction

[0048] Methods of making and using various embodiments of the invention are discussed in detail below. It should be noted, however, that the present invention provides many possible inventive concepts that can be implemented in various specific scopes. These specific examples are only used to illustrate the method of making and using the present invention, but not to limit the scope of the present invention.

[0049] figure 2 It is a schematic circuit diagram showing the surge protection device 130 according to an embodiment of the present invention. The surge protection device 130 is disposed between the three-wire power supply device 105 and the electronic device 140 . The three-wire power supply device 105 supplies power to the electronic device through a live wire L, an earth wire E, and a neutral wire N. The surge protection device 130, coupled to the live line L, the ground line E, and the neutral line N, includes: first, second and third surge protection units S1, S...

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Abstract

The invention discloses a surge protection device which is in coupling connection with a live wire, a neutral wire and a ground wire of a three wire type power supply. The surge protection device comprises a first surge protection unit, a second surge protection unit, a third surge protection unit, a first optical coupling unit and a second optical coupling unit; the first surge protection unit comprises a voltage dependent resistor and a fuse; the second surge protection unit comprises a voltage dependent resistor and a fuse; the third surge protection unit comprises a voltage dependent resistor and a fuse; a normal indicator signal is output from an emitter end of the second optical coupling unit during normal operation of the plurality of fuses of the first surge protection unit, the second surge protection unit and the third surge protection unit; an abnormal indicator signal is output from the emitter end of the second optical coupling unit when one of the plurality of fuses of the first surge protection unit, the second surge protection unit and the third surge protection unit is fused. According to the surge protection device, the complexity of the design is reduced.

Description

technical field [0001] The invention relates to a surge protection device, in particular to a surge protection device for a three-wire power supply capable of detecting failure of the surge protection. Background technique [0002] In order to prevent the surge (surge) of the power supply from being transmitted to the load and cause damage to the load (or machine), it is usually necessary to install a surge protection unit between the power supply and the load (or machine) to absorb the surge from the power supply surge to achieve the function of power protection. In order to know whether the function of the surge protection element is invalid, a signal can be sent from the surge protection unit, and whether the surge protection unit is working normally can be known by processing the signal. For example, the surge protection unit provided by the manufacturer (Littelfuse) is a varistor (iTMOV) with an indicator lead, through which it can be known whether the surge protection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/00
Inventor 柯政煌陈勇杰
Owner WISTRON NEWEB
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