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Standards for Insulating links
ANSI/CPLSO-14
ANSI/UL2737 (Withdrawn)
ASTM F2973
MIL-L-24410 (Withdrawn)
Tests by Independent Organizations
Load Insulator
Miller & Hirtzer
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PAGE 4 3) Slow rate of rise tests at rated to twice voltage on links that are clean and dry place in a fog and a salt fog chamber. Test performed in accordance with IEEE#4 and IEC 507. Measure and record the maximum leakage current at each voltage level. 4) A full voltage sudden application for each of the 3 conditions above. This is a test to determine if after mechanical cycling and weather testing the link will sustain a rated voltage without flashover or failure internally. Another test that maybe considered to evaluate in detail the mechanisms of failure is: Testing at full voltage with typical power line current availability is recommended for the conditions 1 to 3. There can be a major difference in low current availability testing and high current availability testing. MECHANICAL TESTING Rated load should be applied to each link for several cycles that might be determined a life time number of cycled of lift. These further mechanical tests that should be accomplished, as a minimum, prior to electrical testing include: Torsional test Weathering test Impact loading test Shock loading test In Service Testing This is of course a very difficult thing to accomplish except for large users with significant test facilities. In most cases these tests will need to be done at a certified test laboratory. This is not too much to ask given that these are life safety device. The mechanical tests suggested seems appropriate although a shock load or impact load test might be considered. The electrical tests indicated seem appropriate with the exception that I do not agree that DC testing is appropriate testing for this type of device. Testing the link after waxing and cleaning at twice voltage is acceptable. The water absorption testing is also appropriate. I would suggest adding the sudden application of
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