A test device for cable heating and combustion characteristics under simulated fault arc action

A technology for simulating faults and testing devices, which is applied in the field of combustion, cable fire safety, and cable heating, and can solve problems such as inability to satisfy in-depth quantitative analysis of cable fault arc fire behavior, inability to fully reflect the complex layout of cables, and single cable layout methods.

Active Publication Date: 2017-10-27
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the study of the thermal effect of arc faults and the mechanism of cable fires caused by arc faults, the above test methods have obvious limitations: First, the cable layout in space is relatively simple, which cannot fully reflect the complex layout of cables in reality Secondly, the ignition of the cable usually adopts an external local open flame ignition method, which is completely different from the fire dynamics of the ignition by the fault arc; at present, the effect of the fault arc mainly focuses on the influence on the electrical characteristic parameters in the cable circuit , and the reports on the arc thermal effect are still relatively rare, so the existing test methods cannot satisfy the in-depth quantitative analysis of the cable fault arc fire behavior

Method used

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  • A test device for cable heating and combustion characteristics under simulated fault arc action
  • A test device for cable heating and combustion characteristics under simulated fault arc action
  • A test device for cable heating and combustion characteristics under simulated fault arc action

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Embodiment Construction

[0031] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, but it is not intended to limit the present invention.

[0032] figure 1 A schematic diagram of the circuit structure of the cable heating and combustion characteristic testing device under the simulated arc fault action of the present invention is given, figure 2 It is a three-dimensional schematic diagram of the detailed structure of the cable test platform in the test device, image 3 It is a three-dimensional schematic diagram of the detailed structure of the arc starter in the cable test platform.

[0033] Such as figure 1 As shown, a 380V AC power supply 100 connects a current contactor 101, an adjustable resistor 102, and an ammeter 103 in series through a cable sample loop 105, and utilizes the conductive clip A106 and the conductive clip in the cable sample loop 105 B109 is connected in series with a specific length of cable sample A and ...

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Abstract

The invention provides a device for testing cable heating and combustion characteristics under the action of a simulated fault arc, which mainly includes a cable test platform and a corresponding power supply circuit. The cable test platform includes a cable sample to be tested, a cable trough and an arc starter. The cable trough can adjust the space angle of the cable, and a quality measuring device is provided below it. The arc starter can accurately control the artificial fault arc state in the cable sample; through the effect of the arc thermal effect, determine the different The state development mode and critical conditions of the heating, burning and fire spreading process of the cable sample under the inclination angle of the space layout, so as to study the heating and burning behavior of various cables under the action of fault arc, and provide the basis for the cable arc resistance test and classification standards .

Description

technical field [0001] The invention relates to the field of cable heating, combustion and cable fire safety, and more specifically relates to a testing device for cable heating and combustion characteristics under the action of a simulated fault arc. Background technique [0002] The rapid development and wide application of cable technology provide an important guarantee for the production and living standards and the development of the national economy. The cladding material as an important part of the cable: insulation materials such as filling layers, insulating layers, inner sheath layers, and outer sheath layers are usually made of thermoplastic polymers (commonly polyvinyl chloride, polyethylene, polypropylene, etc.) etc.) processed. These materials are often flammable. In addition to increasing the fire load of the application site, the thermoplastic cladding material also softens and deforms after being heated (such as cable short circuit, fault arc or external ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
Inventor 涂然曾怡杜建华杨建红李丽娜张认成
Owner HUAQIAO UNIVERSITY
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