Hot Line Ignition
1. Complies with the standard GB4943. Appendix A42. Sample size: 130mm*13mm,3. Test circuit: 250mm+/-5mm length, diameter 0.5mm (+0.02mm,-0mm), cold resistance of about 5.28 ohms/m (IEC requirements 5.25) of the apparatus (the nominal group is divided into nickel 80%, chromium 20%, iron-free), the straightening of the hot wire and adjustable power supply connected, The power supply to be adjusted to the thermal filament can be generated 0.26w/mm+/-4% dissipation power, and to maintain the 8s-12s, after the hot wire cooling, winding it around the sample 5 laps, the circle distance of 6mm.
1. Compliance with standard GB4943. Appendix A4
2. Sample size: 130mm*13mm,
3. Test circuit: 250mm+/-5mm length, diameter 0.5mm (+0.02mm,-0mm), cold resistance of about 5.28 ohms/m (IEC requirements 5.25) of the apparatus (the nominal group is divided into nickel 80%, chromium 20%, iron-free), the straightened hot wire connected with the adjustable power supply, The power supply to be adjusted to the thermal filament can be generated 0.26w/mm+/-4% dissipation power, and to maintain the 8s-12s, after the hot wire cooling, winding it around the sample 5 laps, the circle distance of 6mm.
4. Installation of the sample: The sample should be supported in the horizontal position, the two ends of the hot CVD are connected with an adjustable power supply, and the adjustable power supply is re-adjusted to make the 0.26w/mm+/-4% dissipate power of the hot wire.
5. Test procedure: At the beginning of the test, the circuit is energized so that the current through the hot wire produces 0.26w/mm+/-4% linear power density.High Voltage Insulation TesterThe test will continue to ignite or reach 120s. When ignition occurs or has reached 120s, the test is interrupted and the test time is recorded. For samples that have been melted by hot wire but not yet ignited, the test can be interrupted when the sample is no longer in close contact with all 5 coils of hot wire.
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