2 Safety
2.1 Safety Symbols
WARNING
HIGH VOLTAGE
Frequency converters contain high voltage when
connected to AC mains input power. Qualified personnel
only should perform installation, start up, and
maintenance. Failure to perform installation, start up,
and maintenance by qualified personnel could result in
death or serious injury.
WARNING
UNINTENDED START
When the frequency converter is connected to AC mains,
the motor may start at any time. The frequency
converter, motor, and any driven equipment must be in
operational readiness. Failure to be in operational
readiness when the frequency converter is connected to
AC mains could result in death, serious injury,
equipment, or property damage.
WARNING
DISCHARGE TIME
Frequency converters contain DC-link capacitors that can
remain charged even when the frequency converter is
not powered. To avoid electrical hazards, disconnect AC
mains, any permanent magnet type motors, and any
remote DC-link power supplies, including battery back-
ups, UPS, and DC-link connections to other frequency
converters. Wait for the capacitors to fully discharge
before performing any service or repair work. The
amount of wait time is listed in the
Discharge Time
table.
Failure to wait the specified time after power has been
removed before doing service or repair could result in
death or serious injury.
Voltage [V]
Power range [kW]
Minimum waiting time
(minutes)
3x400
110-315
20
3x460
110-315
20
3x575
110-315
20
Table 2.1 Discharge Time
Table 2.2 Approvals
The frequency converter complies with UL508C thermal
memory retention requirements. For more information,
refer to the section
Motor Thermal Protection
in the
product specific
design guide
.
NOTICE
Imposed limitations on the output frequency
(due to export control regulations):
From software version 6.72 onwards, the output
frequency of the frequency converter is limited to 590
Hz. Software versions 6x.xx also limit the maximum
output frequency to 590 Hz, but these versions cannot
be flashed, that is, neither downgraded nor upgraded.
Safety
Installation Guide
MG35Q202
Danfoss A/S © 01/2015 All rights reserved.
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