|
--------------------------------------------------------------------------------------------------------------------------------------/ z6 |5 S, N( ~6 j, d6 G' o
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.( g9 z& y- Z% u C
--------------------------------------------------------------------------------------------------------------------------------------
. `% y1 C+ P' R$ I% R" k' P* J* M: p) D' n% g
Above is from UL standard, normally, three points 90%,100% and 110%, then select the max load(output current) case... |
|