Voltage dips, short
interruptions and
voltage variations
on power supply
input lines
IEC 61000-4-11
Power frequency
(50Hz/60Hz)
IEC 61000-4-8
NOTE: UT is the a.c. mains voltage prior to application of the test level.
<5% UT
(>95% dip
in UT) for
0.5 cycle
40% UT
(60% dip
in UT) for 5
cycles
70% UT
(30% dip in
UT) for 25
cycles
<5% UT
(>95% dip
in UT)for 5
sec
10V/m
36 36
not
applicable
10V/m
not applicable
(For INTERNALLY
POWERED ME
EQUIPMENT
Power frequency
should be at levels
characteristic of a
typical location in a
typical commercial
or hospital environ-
ment