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A short-circuit auxiliary protection device for long-distance mine roadway low-voltage power supply equipment

A low-voltage power supply and protection device technology, applied in circuit devices, emergency protection circuit devices, electrical components, etc., can solve the problems of low safety, rapidity and poor reliability, and achieve improved safety, rapidity, and action sensitivity. high effect

Inactive Publication Date: 2016-08-17
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is an auxiliary short-circuit protection device for long-distance mine roadway low-voltage power supply equipment to solve the problems of low safety, rapidity, and poor reliability in the above-mentioned prior art, thereby disclosing a device that can independently and automatically realize circuit protection. The technical scheme of short-circuit auxiliary protection, the device is suitable for short-circuit auxiliary protection of long-distance roadway power supply for various low-voltage power supply equipment in coal mines, and the short-circuit protection distance of power supply can reach 3000 meters

Method used

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  • A short-circuit auxiliary protection device for long-distance mine roadway low-voltage power supply equipment
  • A short-circuit auxiliary protection device for long-distance mine roadway low-voltage power supply equipment

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Embodiment approach 1

[0045] Attached below figure 1 And attached figure 2 And the embodiments further describe in detail the working principle of the application of the short-circuit auxiliary protection device for long-distance mine roadway low-voltage power supply equipment of the present invention to the comprehensive protection device for underground lighting in coal mines.

[0046] The terminal monitoring unit of the present invention is installed at the load end of the power supply circuit of the lighting comprehensive protection device. The power supply voltage of the coal mine underground lighting is 127V. The terminal monitoring unit three-gear switch S1 is selected to be adjusted to the right gear, and the primary coil of the No. 1 transformer T1 is selected. The 3' and 4' input terminals are respectively connected to A3 and B3, the 3" and 4" input terminals of the primary coil of the No. 2 transformer T2 are respectively connected to B3 and C3, and the 3"' and 4"' input terminals of th...

Embodiment approach 2

[0051]This embodiment is basically the same as Embodiment 1, the difference is that a short-circuit auxiliary protection device for long-distance mine roadway low-voltage power supply equipment of the present invention is used for the short-circuit auxiliary protection of the magnetic starter, and the start-end monitoring unit is installed in the magnetic starter housing. , the terminal monitoring unit is installed at the end of the power supply line. When the 1140V three-phase AC power supply is used, the three-position switch S1 of the terminal monitoring unit is adjusted to the left gear, and the 1' and 4' input terminals of the primary winding of the No. 1 transformer T1 are respectively Connect with A1 and B1, the 1" and 4" input ends of the primary winding of No. 2 transformer T2 are respectively connected with B1 and C1, and the 1"' and 4"' input ends of the primary winding of No. 3 transformer T3 are respectively connected with C1 and A1. Terminals A1, B1, and C1 are re...

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Abstract

The invention discloses an auxiliary short circuit protection device for a low-voltage power supply device of a long-distance mine laneway and belongs to the technical field of underground power supplying of coal mines. The auxiliary short circuit protection device for the low-voltage power supply device of the long-distance mine laneway is characterized in that the whole device is composed of an initial end monitoring unit and a terminal monitoring unit, and the terminal monitoring unit can detect short-circuit faults in real time and transmit information to the initial end monitoring unit through data transmission, so that the initial end monitoring unit is controlled to cut off the power supply of a faulted circuit rapidly and accurately. The auxiliary short circuit protection device for the low-voltage power supply device of the long-distance mine laneway has the advantages that the safety performance is high, the reliability is high, and the rapidness is achieved and is suitable for short circuit protection for various low-voltage power supply devices supplying power to long-distance laneways.

Description

technical field [0001] The present invention is an auxiliary short-circuit protection device for long-distance mine roadway low-voltage power supply equipment, which belongs to the technical field of coal mine underground power supply. It is an auxiliary protection device after the short-circuit protection of low-voltage power supply equipment fails. The short-circuit auxiliary protection of low-voltage power supply equipment such as magnetic starters has the advantages of high safety, high reliability, and good speed. Background technique [0002] Short-circuit protection is one of the important guarantees for the safety of underground power supply systems in coal mines. Its main function is to quickly and reliably cut off the power supply of the faulty part when a short-circuit fault occurs in the power supply system to prevent the occurrence of hazards. In the underground low-voltage power supply system of coal mines, as the length of the power supply line increases, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26H02J13/00
CPCY02B90/20Y04S40/124
Inventor 靳宝全白清萧凯雁高妍张红娟乔铁柱王东
Owner TAIYUAN UNIV OF TECH
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