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Help CenterIEC60695-2-20 Hot Wire Ignition Test Apparatus
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IEC60695-2-20 Hot Wire Ignition Test Apparatus
1. Introduction
The hot wire ignition test apparatus is designed according to the standards of IEC60950, IEC60695-2-20, UL60950, ASTMD3874 and etc.. The hot wire ignition test uses a heating wire of a specific size (Φ0.5 mm* 250 mm) and a specific material (Ni80/Cr20), after pre-annealing with specified heating power (0.26W/mm) and the specified time (8s~12s), the hot wire is wound five times on the sample with a certain winding tension (5.4N) and a certain winding spacing (6.35mm), then the sample with the hot wire wound at the specified heating power (0.26W) )test for 120 s, the fire risk is assessed by whether the sample is ignited or the time taken to ignite. The hot wire ignitio test apparatus is applied to the industries of lighting fixtures, low voltage appliance, household appliance and etc., and also applied to insulating material, and electrical connector.
The hot wire ignition test apparatus is controlled by single chip and push buttons. The test apparatus is built-in air exhaust, the exhaust fan automatically draws air when power on, and automatically run for 2 minutes when power off. The front panel is transparent for easy observation of the experimental process.
2. Parameter
Hot wire |
1). size: Φ0.5mm in diameter, 250mm in length 2). Cold resistance: 5.28Ω/m 3). Material: 80% nickel / 20% chrominum |
Annealed stent spacing |
250mm |
Test fixture |
70mm pitch, 60mm height |
Winding tension |
5.4N±0.2N |
Winding space |
6.3±0.2mm |
Annealing time |
8-12s |
Test time |
0~999.9s (presettable, digital display, normally 120s) |
Test power |
0.26±0.01W/mm (digital display) |
Test specimen |
125*13*3mm |
Test chamber |
0.5m3 ( customizable 0.75m3, 1m3 according to difference standards), draught-proof and dark background,with exhaust fan and lighting device |
Dimension |
1000mm*650mm*1300mm |
Standard |
IEC60950, IEC60695-2-20, UL60950, ASTMD3874 |
Working Power |
220V/50Hz |
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