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Flameproof protection switch

A technology of protection switch and zero-sequence transformer, which is applied in the direction of protection switch operation/release mechanism, electromagnetic release switch, calibration/finding protection device, etc. It can solve the problem of single overload protection function and achieve fast action speed and long service life , the effect of simple structure

Active Publication Date: 2007-05-09
ZHEJIANG CHINT BUILDING ELECTRICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially for small household appliances with rated current below 1A, the defects are more obvious
At the same time, the existing fire protection socket only has a single overload protection function

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Referring to Fig. 1 and Fig. 2, the mechanical structure part of the fire protection switch of the present invention includes an overcurrent sensor 1, a zero-sequence transformer 2, a test button 19, a reset button 16, a control circuit 17, an electromagnetic release, N poles and L The two static contact pieces 12 and the moving contact piece 3 of the pole. The electromagnetic release includes a skeleton 21 , a main trip coil 4 wound on the skeleton 21 , a short-circuit trip coil 5 wound outside the main trip coil 4 , and a common iron core 6 and spring 7 .

[0026] The circuit board 13 is used as a substrate, and all electronic components and other components are welded on the substrate 13 . Rivet the two moving contacts 3 of the L pole and the N pole together with the insulating hook 9, rivet a moving contact 10 on each end, and after the other end passes through the zero-sequence transformer 2, the N pole is bent outwards and crosses the The overcurrent sensor is fi...

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PUM

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Abstract

The multifunctional flameproof protection switch includes current sensor, zero sequence mutual inductor, test button, reset button, control circuit, electromagnetic trip, two pieces of static contactor and moving contactor. Characters are: one end of moving contactors is setup at circuit board, an insulated hook is setup at middle, and a moving contactor is setup at the other end respectively; reset spring is sheathed on the reset button; being setup at base and configured opposite to insulated hook, reset hook is connected to iron core; static contactor is setup at one end of the static piece, and circuit board is at the other end of the static piece; N pole is passed through the zero sequence mutual inductor. L pole is passed through both of the inductor and current sensor. Using iron core to pull the reset hook makes release between reset hook and insulated hook so as to disconnect electrical source. Advantages are: large tripping force, quick action, and high sensitivity etc.

Description

Technical field: [0001] The invention relates to a high-sensitivity fire protection switch, which is a fire protection device with multiple functions such as short circuit protection, overload protection, overvoltage protection, overheat protection and leakage protection. technical background: [0002] Along with the development of science and technology, the power switch with fire prevention function is gradually demanded by people. The fire protection switch will provide a reliable guarantee for the protection of property such as personal and electrical appliances. The fire protection switch is realized by adding an overload protector to the power protection switch. Existing overload protectors mainly use bimetallic strips, which are bent and deformed after being energized and heated to cut off the power supply. When the overload current is doubled, it usually takes a few seconds to half an hour to trip, so the power supply cannot be disconnected quickly, and The breakin...

Claims

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Application Information

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IPC IPC(8): H01H71/24H01H71/58H01H73/44H01H83/14H01H69/01
Inventor 祝振卿陈玉
Owner ZHEJIANG CHINT BUILDING ELECTRICS
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