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Self resetting fuse operation time detector

A self-recovery fuse, action time technology, applied in the direction of fuse testing, instruments, measuring electricity, etc., to achieve the effect of simple structure and convenient use

Inactive Publication Date: 2005-05-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The user selects the applicable model according to his own needs and the relationship curve of the action time of each type of fuse to the fault current. Therefore, it is very important to accurately measure the action time for the preparation of the fuse. There is no suitable fuse action time test instrument in China.

Method used

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  • Self resetting fuse operation time detector

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Embodiment Construction

[0009] refer to figure 1 , a self-recovery fuse action time tester invented, including a multi-function card of the model PCL-812 connected to the extended industry standard structure bus EISA Bus of the computer motherboard, a resistor R1, a sampling resistor R2, a current-limiting resistor R3 and a double pole double Throw switch K, one end of resistor R1 is connected to one end of sampling resistor R2 and the grounding point of the multi-function card, the other end of sampling resistor R2 is connected to pin 1 of the multi-function card, the other end of resistor R1 is connected to the multi-function card The No. 5 pin of the DPDT switch K is connected to the first contact 1, one end of the current limiting resistor R3 is connected to the second contact 2 of the DPDT switch K, and the other end is connected to the power supply. The third contact of throwing switch K is connected with No. 13 pin of the multi-function card. The connection between the sampling resistor R2 an...

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Abstract

The self-resetting fuse response time tester includes PCL-812 multifunctional card connected to EISA bus of computer mainboard, resistor R1, sampling resistor R2, current limiting resistor R3 and DPDT switch connected together. The tester has simple structure and convenient use, and is used in measuring the response time of self-resetting fuse precisely for user to select.

Description

technical field [0001] The invention relates to a self-recovery fuse operating time tester. Background technique [0002] Polymer-based conductive composite materials often have a positive temperature coefficient (PTC) effect, that is, the resistivity of the material increases with the increase of temperature, and it increases sharply near the melting point of the polymer, which has thermal switching characteristics. The material can be used in the preparation of circuit protection components. The self-recovery fuse made of polymer PTC material, when the current increases rapidly, the temperature of the fuse rises, the resistance rises, the circuit is like an open circuit, and the purpose of protection is achieved. When the abnormal current disappears, the temperature of the fuse drops, the resistance drops, and the circuit returns to normal , without replacement or repair. [0003] Electronic equipment often uses resettable fuses as overcurrent protection. The relationshi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/74
Inventor 沈烈李文春曹苏华郑强
Owner ZHEJIANG UNIV