2.1.2. High Voltage
The voltage of the adjustable frequency drive is dangerous whenever the adjustable
frequency drive is connected to line power. Incorrect installation or operation of the
motor or adjustable frequency drive may cause damage to the equipment, serious
personal injury or death. The instructions in this manual must therefore be observed,
in addition to applicable local and national rules and safety regulations.
Installation at high altitudes
At altitudes higher than 6,500 ft [2 km], please contact Danfoss Drives regarding
PELV.
The voltage of the adjustable frequency drive is dangerous whenever connected to
line power. Incorrect installation of the motor, adjustable frequency drive or serial
communication bus may cause damage to the equipment, serious personal injury or
death. Consequently, the instructions in this manual, as well as national and local
rules and safety regulations, must be followed.
Safety Regulations
1. The adjustable frequency drive must be disconnected from line power if repair work is
to be carried out. Make sure that the line supply has been disconnected and that the
necessary time has passed before removing motor and line plugs.
2. The [STOP/RESET] key on the control panel of the adjustable frequency drive does not
disconnect the equipment from line power and is thus not to be used as a safety switch.
3. Correct protective grounding of the equipment must be established, the user must be
protected against supply voltage, and the motor must be protected against overload in
accordance with applicable national and local regulations.
4. The ground leakage currents are higher than 3.5 mA.
5. Protection against motor overload is not included in the factory setting. If this function
is desired, set par. 1-90 to data value ETR trip or data value ETR warning.
6. Do not remove the plugs for the motor and line supply while the adjustable frequency
drive is connected to line power. Make sure that the line supply has been disconnected
and that the necessary time has passed before removing motor and line plugs.
7. Please note that the adjustable frequency drive has more voltage inputs than L1, L2 and
L3 when load sharing (linking of DC intermediate circuit) and external 24 V DC have been
installed. Make sure that all voltage inputs have been disconnected and that the neces-
sary time has passed before commencing repair work.
2. Safety Instructions and General Warning
VLT
®
AutomationDrive FC 300 Instruction
Manual
8
MG.33.A9.22 - VLT is a registered Danfoss trademark
2
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