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; d7 \4 H# R! X' f. u, _39.3 Tests are to be conducted at rated frequency and a test potential not less than 120, 208, 240, 277, 480, or 600 volts as appropriate for the voltage ratings. See Table 39.2. The Temperature Test shall be conducted at a potential between 90 – 110 percent of the potential specified when the load current is adjusted to produce the maximum normal heating.
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, [1 O* ?% K: Q. t' I/ ^Above is from UL standard, normally, three points 90%,100% and 110%, then select the max load(output current) case... |
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