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Circuit for displaying exception of three-phase shock wave absorber and multi-end fuse

A technology of surge absorbing and indicating circuits, which is applied in the direction of emergency protection circuit devices, circuits, circuit devices, etc. for limiting overcurrent/overvoltage, and can solve the problem that failures of surge absorbing devices cannot be detected and cannot be detected. Problems such as failure of the surge absorbing device 30

Inactive Publication Date: 2008-01-30
周义雄
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the metal oxide varistor 301 is abnormal and gradually heats up, because it is close to the two-terminal temperature-sensing fuse 303, the temperature of the metal-oxide variable resistor 301 will eventually burn out the two-terminal temperature-sensing fuse 303, but The two-terminal temperature sensing fuse 101 has not been blown, so the surge protection indicator light 202 has not been extinguished, so it is impossible to detect the failure of the surge absorbing device 30 between L-G
In addition, when the metal oxide variable resistor 302 is abnormal and gradually generates heat, because it is close to the two-terminal temperature-sensitive fuse 303, the metal-oxide variable resistor 302 will eventually burn out the temperature of the two-terminal temperature-sensitive fuse 303 due to the heating temperature. The two-terminal temperature sensing fuse 101 has not been blown, so the surge protection indicator light 202 has not been extinguished, and therefore it is impossible to detect the failure of the surge absorbing device 30 between N-G

Method used

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  • Circuit for displaying exception of three-phase shock wave absorber and multi-end fuse
  • Circuit for displaying exception of three-phase shock wave absorber and multi-end fuse
  • Circuit for displaying exception of three-phase shock wave absorber and multi-end fuse

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Embodiment Construction

[0012] Please refer to FIG. 2 , which shows a circuit diagram capable of displaying abnormality of a mains three-phase surge absorber according to a preferred embodiment of the present invention. As shown in the figure, the circuit of the present invention includes a first surge absorbing device 40 , a first three-terminal fuse 50 , an abnormality indicating circuit 60 , a second surge absorbing device 70 and a second three-terminal fuse 80 . The first surge absorbing device 40 has a two-terminal temperature sensing fuse 401 that can withstand 139 degrees Celsius and a metal oxide variable resistor 402 . Wherein the first three-terminal fuse 50 and the second three-terminal fuse 80 have a plurality of endpoints, one or more endpoints are added to the two-terminal fuse, and when the first endpoint and the second endpoint of the two-terminal fuse flow through the When the current of the two-terminal fuse is turned on, the third terminal or these terminals are cut at the same tim...

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Abstract

A circuit for displaying the abnormality of three-phase shock wave absorber by serially connecting it between input and output of city power supply is composed of two shock wave absorbers, two 3-ended fuses and an abnormality indicating circuit. Its advantages include high effect and no generation of electric leakage.

Description

technical field [0001] The invention relates to a display circuit for abnormality of a power supply, and in particular to a circuit capable of displaying abnormality of a three-phase surge absorber of commercial power. In particular, the present invention further provides a multi-terminal fuse so that it can be used in the circuit that can display the abnormality of the mains three-phase surge absorber. Background technique [0002] In general power socket products with surge protection (Surge Protection), metal oxide variable resistors (Metal Oxide Varistor, MOV for short) or other transient / surge absorbers (Transient / Surge Absorbers) similar Components to suppress the generation of surges. These components will also generate heat when absorbing surges, and even short-circuit when encountering very large surges that cannot be tolerated, so thermal fuses or current fuses are used to prevent abnormal conditions. [0003] And is the general indication surge protection circui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/04H02H3/20H02H3/04H01H85/00
Inventor 周义雄
Owner 周义雄