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Voltage dips, short
interruptions and
voltage variations
on power supply
input lines
IEC 61000-4-11
<5 % U
T
(>95 % dip in U
T
)
for 0,5 cycle
40 % U
T
(60 % dip in U
T
)
for 5 cycles
70 % U
T
(30 % dip in U
T
)
for 25 cycles
<5 % U
T
(>95 % dip in U
T
)
for 5 s
<5 % U
T
(>95 % dip in U
T
)
for 0,5 cycle
40 % U
T
(60 % dip in U
T
)
for 5 cycles
70 % U
T
(30 % dip in U
T
)
for 25 cycles
<5 % U
T
(>95 % dip in U
T
)
for 5 s
Mains power quality
should be that of a
typical commercial or
hospital environment.
If the user of the electric
breastpump Freestyle
requires continued
operation during power
mains interruptions, it is
recommended
that the electric
breastpump Freestyle
is powered from an
uninterruptible power
supply or a battery.
Power frequency
(50/60 Hz)
magnetic fi eld
IEC 61000-4-8
3 A/m 3 A/m
Power frequency
magnetic fi elds should be
at levels characteristic of a
typical location in a typical
commercial or hospital
environment.
NOTE U
T
is the a.c. mains voltage prior to application of the test level.
20. EMC / Technical Description (cont.)
42
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