Medela Symphony - Page 46

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
Symphony electric breast
pump requires continued
operation during power
interruptions, it is
recommended that the
Symphony electric breast
pump is powered from
an uninterruptible power
supply or a battery.
Power frequency
(50/60 Hz)
magnetic field
IEC 61000-4-8
3 A/m 30 A/m
Power frequency
magnetic fields should be
at levels characteristic of a
typical location in a typical
commercial or hospital
environment.
NOTE U
T
is the a.c. voltage prior to application of the test level.
20. EMC / Technical Description (cont.)
46