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Default phase, zero missing, null line breaking and short circuiting protecting device in low-voltage power supply system

A technology of power supply system and zero line disconnection, applied in the direction of automatic disconnection of emergency protection devices, circuit devices, emergency protection circuit devices, etc., can solve the problems of burning electrical equipment, loss of enterprises and residents, etc. , Simple operation, low cost effect

Inactive Publication Date: 2014-09-17
王新强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the low-voltage power supply system, when there is a sudden phase loss, zero loss, or zero line disconnection during the power consumption process, the electrical equipment will be burned, which will cause undue losses to our enterprises and residents.

Method used

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  • Default phase, zero missing, null line breaking and short circuiting protecting device in low-voltage power supply system

Examples

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Embodiment Construction

[0010] The principles and features of the present invention are described below, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0011] like figure 1 As shown, a protection device for phase loss, zero loss, zero line disconnection and short circuit in a low-voltage power supply system, the protection device includes an intermediate relay 4, a button 5, and a contactor 6 connected in series; the protection device also includes the first An overvoltage relay 1 , a second overvoltage relay 2 and a third overvoltage relay 3 , wherein the first overvoltage relay 1 controls the intermediate relay 4 , and the second and third overvoltage relays control the contactor 6 via the intermediate relay 4 .

[0012] The first overvoltage relay can be replaced by a first undervoltage relay, the second overvoltage relay can be replaced by a second undervoltage relay, and the third overvoltage relay can be...

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PUM

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Abstract

The invention relates to a default phase, zero missing, null line breaking and short circuiting protecting device in a low-voltage power supply system. The protecting device comprises an intermediate relay, a button and a contactor which are connected in series in sequence. The protecting device further comprises a first overvoltage relay, a second overvoltage relay and a third overvoltage relay. The first overvoltage relay controls the intermediate relay, and the second overvoltage relay and the third overvoltage relay control contactor through the intermediate relay. According to the protecting device, a power supply can be quickly turned off under any situation of default phase or zero missing or null line breaking in the low-voltage power supply system, and the protecting device is quick in outage, low in cost and convenient to operate.

Description

[0001] technical field [0002] The invention relates to a protection device for phase loss, zero loss, zero line disconnection and short circuit in a low-voltage power supply system. Background technique [0003] In daily production and life, electricity is inseparable all the time, and electricity safety is particularly important. In the low-voltage power supply system, when there is a sudden phase loss, zero loss, or zero line disconnection during the power consumption process, the electrical equipment will be burned, which will cause undue losses to our enterprises and residents. Contents of the invention [0004] The present invention aims at the deficiencies of the above-mentioned prior art, and provides a protection device for phase loss, zero loss, zero line disconnection and short circuit in a low-voltage power supply system. The protection device has the advantages of fast power failure, low cost and easy operation. [0005] The technical solution of the presen...

Claims

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Application Information

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IPC IPC(8): H02H3/20H02H3/253H02H3/08H02H3/00
Inventor 王新强
Owner 王新强
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