IEC60695-2-20 hot wire ignition tester to fire hazard tesing
Application :
The hot wire ignition test requirements for electrical and electronic products, household appliances,fire hazard testing of materials,components or simulation burning like overload resistance heat or ignition source in a short time caused by thermal-tress
Hot wire ignition performance is expressed as the mean number of seconds needed to either standard specimens without ignition,the specimens are wrapped with resistance wire that dissipates a specified level of electronic energy
Standard :
Iec60695-2-20 fig 4 GB4943 - 2001,IEC60950:1999,IEC60695-2-20,UL60950,ASTM D3874 - 1997,UL60950,IEC60950-1999,ASTM D3874 - 1997
Specifications :
A current: current yielding a linear power density of 0.26w/mm through the heater wire
B Test specimen winding device :provided to wind five turns of the heater wire uniformly on the test specimen with a 6.3mm +/- 0.2mm pitch and a tension of 5.4N+/-0.05N
C.heating wire:0.5mm+/-0.020mm Ni/Cr (80/20) ,and has a nominal cold resistance of approximately 5.25
D.Supply circuit:0.3w/mm power density ,adjusting the power level smoothly and continuously , with an on-off switch for the test power and timers to record the duration of application of the test power
E.Chamber with volume of at least 0.5mm3,black interior
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