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Electric fireproof current-limiting type protector

A protector and current limiting technology, applied in electrical components, emergency protection circuit devices for limiting overcurrent/overvoltage, emergency protection circuit devices, etc. Achieve the effect of improving the use efficiency and preventing the expansion of failure accidents

Inactive Publication Date: 2010-12-22
SHANGHAI CHENGJIA ELECTRONICS TECH
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AI Technical Summary

Problems solved by technology

[0002] The electrical fire-proof current-limiting protector studies the occurrence mechanism of electrical fires (especially those caused by electrical short circuits), analyzes the shortcomings of current electrical fire monitoring equipment, and implements technological innovations to prevent electrical short circuits. By optimizing the combination, research and development of electrical fire monitoring equipment with more pertinence, higher efficiency and more stable quality can make up for the shortcomings of traditional electrical fire monitoring equipment such as long short-circuit current limiting protection time and large impact after short-circuit, and improve monitoring Electrical Fire Efficiency

Method used

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  • Electric fireproof current-limiting type protector

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Embodiment Construction

[0009] 1. The short-circuit protection of the product, the absence of dangerous sparks at the short-circuit and the corresponding verification methods, the measurement and calculation of the short-circuit current;

[0010] 2. The product limits the short-circuit current at the microsecond level, so that the short-circuit current only rises to several times the normal load current;

[0011] 3. The reliability of product performance, and ensure that new products can meet the relevant requirements of GB14287.1-2005 "Electrical Fire Monitoring System Part 1: Electrical Fire Monitoring Equipment".

[0012] 4. Realize the microsecond-level current-limiting protection for electrical fires. The current limiting is completed before the short-circuit current is formed, and the short-circuit current is reduced to 5% of the setting value of the short-circuit protection current within 150μs, thereby greatly reducing the continuous arcing and ignition of combustibles caused by the short-cir...

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Abstract

The invention relates to an electric fireproof current-limiting type protector which fast completes short circuit current limitation by using a high-power insulated gate MOSFET (Metal-Oxide -Semiconductor Field Effect Transistor) and has a working principle that partial energy of load currents or fault currents is used as the supplying electricity of an internal control circuit through the transformation of a current transformer so that a product can achieve excellent low-voltage characteristics and microsecond-grade fast short circuit current limitation capability under the conditions of no any auxiliary power supply. Aiming at electric fireproofing, the invention can complete the limitation of short circuit fault currents at a microsecond grade so that short circuit currents are only increased to several times of the normal load currents without generating electric arcs near short circuit points, thereby greatly reducing the occurrence probability of fire hazards and reducing the occurrence probability of short circuit electric fire hazards by 30-50 percent; in addition, the invention plays a good prevention role on the short circuit electric fire hazards, thereby reducing the economic loss caused by the fire hazards.

Description

technical field [0001] This APEpro lossless digital audio hard decoding chip involves audio processing, genuine protection, mobile phones, portable digital players and other technical fields. Background technique [0002] The electrical fire-proof current-limiting protector studies the occurrence mechanism of electrical fires (especially those caused by electrical short circuits), analyzes the shortcomings of current electrical fire monitoring equipment, and implements technological innovations to prevent electrical short circuits. By optimizing the combination, research and development of electrical fire monitoring equipment with more pertinence, higher efficiency and more stable quality can make up for the shortcomings of traditional electrical fire monitoring equipment such as long short-circuit current limiting protection time and large impact after short-circuit, and improve monitoring Electrical Fire Efficiency. [0003] The electrical fire-proof current-limiting prot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02
Inventor 翁天禄
Owner SHANGHAI CHENGJIA ELECTRONICS TECH
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