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46 Battery Charger Overcharge Test
46.1 When connected to a supply circuit adjusted to 106 percent of the test voltage specified in 31.1, a
battery supply of a converter or inverter is to be subjected to 7 hours of overcharging using a fully charged
battery. Any user adjustable controls associated with the charger or charging circuit are to be adjusted for
the most severe charging rate.
Exception No. 1: This requirement does not apply to a converter or inverter to be used with a battery
supply that is not investigated with the converter or inverter.
Exception No. 2: This requirement does not apply to a converter or inverter provided with a regulating
circuit preventing an increase in battery charging current when the ac input voltage is increased from rated
value to 106 percent of rated value.
46.1 revised October 15, 2004
46.2 The most severe charging rate referred to in 46.1 is the maximum charging rate that does not cause
a thermal or overcurrent protective device to open.
46.2 revised October 15, 2004
46.3 Deleted October 15, 2004
47 Abnormal Operation Test
47.1 General
47.1.1 A converter or inverter shall not emit flame or molten metal or become a risk of fire, electric shock,
or injury to persons when subjected to the tests described in 47.1.3 – 47.9.3, 47.11.1 and 48.1.1 – 48.3.1.
Separate samples may be used for conducting these tests.
47.1.1 effective April 13, 1993
47.1.2 Following each test, a dielectric voltage withstand test as specified in 39.1(a) is to be conducted.
Exception: If agreeable to all involved, more than one abnormal test may be conducted on a single
sample, and the dielectric voltage withstand test may be conducted after completion of all the abnormal
tests.
47.1.2 effective April 13, 1993
47.1.3 The converter or inverter is to be at room temperature at the start of the output-short-circuit,
switch-position, and specific-value-overload tests.
47.1.3 effective April 13, 1993
47.1.3.1 A risk of fire, electric shock, or injury to persons is considered to exist if:
a) Flame, burning oil, or molten metal is emitted from the enclosure of the converter or inverter
as evidenced by ignition, glowing, or charring of the cheesecloth or tissue paper,
b) The insulation breaks down when tested in accordance with 47.1.2, or
c) Live parts are made accessible (see Protection of Users – Accessibility of Uninsulated Live
Parts, Film-Coated Wire, and Moving Parts, Section 8).
47.1.3.1 revised October 15, 2004
OCTOBER 15, 2004UL 45860
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