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Material Classification UL94-5V for 500W Vertical Burning Test 2015-08-13
Material Classification UL94-5V for 500W Vertical Burning Test According to requirement of UL94, a material shall be classified UL94-5V as described as below: Criteria 5VA 5VB Afterflame time plug afterglow time after fifth flame application for each individual bar specimen&nbs...
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How to determine UL94 classed V-1 testing ? 2015-08-12
How to determine UL94 classed V-1 testing ? As per UL94 standard, a material shall be classified V-1 as described as below: 6.Afterflame time for each Individual specimen t1or t2 : ≤30s 7.Total afterflame time for any condition set ( t1 plus t2 for the 5 specimens): ≤250s 8.Afterflame plus afterglow time for each Indiv...
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How to determine UL94 classed 94-5VA testing ? 2015-08-11
How to determine UL94 classed 94-5VA testing ? As per UL94 standard, a material shall be classified 94-5VA as described as below: 1 Afterflame time plus afterglow time after fifth flame application for each individual bar specimen : ≤ 60s 2 Cotton Indicator Ignited by flaming particles or drop from any bar specimen: No...
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Test procedure for UL94 Classed V Testing 2015-08-10
Test procedure for UL94 Classed V Testing According to requirements of UL94 standard, shall follow test procedure as below to complete UL94 classed V testing: A. Clamp the specimen from the upper 6mm of the specimen, with the longitudinal axis vertical, so that the lower end of the specimen is 300±10mm above a horizont...
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Test procedure for UL94 Classed HB testing? 2015-08-08
Test procedure for UL94 Classed HB testing? According to requirements of UL94 standard, shall follow test procedure as below to complete UL94 classed HB testing: 1.Three specimen are to be tested. Each specimen is to be marked with 2 lines perpendicular to the longitudinal axis of the bar, 25±1mm and 100±1mm from the e...
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How to determine UL94 classed HB testing? 2015-08-07
How to determine UL94 classed HB testing? As per UL94 standard, a material shall be classified HB as described as below: A.Not have a burning rate exceeding 40mm per minute over a 75mm span for specimens having a thickness of 3.0 to 13 mm, or B.Not have a burning rate exceeding 75mm per minute over a 75mm span for spec...
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The requirements of anti- electric shock during IP protection testing 2015-08-06
The requirements of anti- electric shock during IP protection testing According to IEC60529, for tests on low-voltage equipment, a low-voltage supply (of not less than 40 V and not more than 50 V) in series with a suitable lamp should be connected between the probe and the hazardous parts inside the enclosure. Ha...
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How to do IPX5 IPX6 testing with jet test nozzles? 2015-08-06
How to do IPX5 IPX6 testing with jet test nozzles? Conform to IEC60529 IPX5, test for second characteristic numeral 5 with the 6.3mm nozzle: The test is made by spraying the enclosure from all practicable directions with a stream of water from a standard test nozzle as shown in figure 6. The condition to be observed ar...
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How to do impact testing for lamp used in poor condition? 2015-07-25
How to do impact testing for lamp used in poor condition? According to the standard of IEC60598, lamp fixtures should have enough mechanical strength under poor condition , and can not be toppled over in the case expected during normal use . Also the fixing device jointed to support stand of lamp should have sufficient...
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How to determine if tracking test for lamp accessories is qualified ? 2015-07-18
How to determine if tracking test for lamp accessories is qualified ? According to the requirements of IEC60598 standard, the qualification of tracking test for lamp accessories should be determined as below : The specimen shall withstand 50 drops without failure at a test voltage of PTI 175. A failure has occurred if ...
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