UL大電流アーク発火試験方法の発火点の判定方法

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  • Method of Determining Ignition Point for High Current Arc Ignition Test Method Specified in UL Standard
  • UL ダイ デンリュウ アーク ハッカ シケン ホウホウ ノ ハッカテン ノ

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High current arc ignition test is a method for testing flammabilty of polymeric insulating materials specified in UL standard. The determination of ignition point has a difficulty in distinguishing the ignition light of materials from the arc light of electrode itself. We analyzed the light generated during arc ignition test and found that mainly the ignition light of materials is generated while electrodes contact each other and that both light overlap while electrodes separate each other. We have designed a measuring circuit that can detect only the light generated while the electrodes contact each other.Accordingly the determination for ignition point was performed by measuring mainly the ignition light of materials with the circuit. Test results showed that the ignition point of several materials could be determined easily by using the light detecting circuit of our design.

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