ANSI UL 458 - Output Voltage and Current Test; Temperature Test; Normal

UL COPYRIGHTED MATERIAL –
NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
DISTRIBUTION WITHOUT PERMISSION FROM UL
36 Output Voltage and Current Test
Section 36 effective April 13, 1993
36.1 With respect to 13.5, the measurement is to be made with all loading circuits disconnected from the
transformer or power supply being tested. Measurements may be made at the output terminals of the
transformer or power supply.
36.2 The maximum current is to be measured under any condition of loading, including short circuit, using
a resistor that is continuously re-adjusted during the 1-minute period to maintain maximum load current.
37 Temperature Test
37.1 Normal
37.1.1 When tested on an open bench as described in 37.1.2 – 37.1.11, with the output load adjusted to
deliver the maximum normal-load current, see 33.2 – 33.4, a converter or inverter shall not attain a
temperature at any point high enough to constitute a risk of fire, adversely affect any material employed
in the converter, or exceed the temperature limits specified in Table 37.1. See also 37.1.8.
37.1.1 effective April 13, 1993
DECEMBER 14, 1993UL 45850