2.1.1 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 in high altitudes
380-500 V: At altitudes higher than 10,000 ft [3 km], please contact Danfoss Drives regarding PELV.
525-690 V: 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. Con-
sequently, the instructions in this manual, as well as national and local rules and safety regulations, must be followed.
Safety Regulations
1. The line power supply to the adjustable frequency drive must be disconnected whenever repair work is to be carried out. Make sure that the
line power supply has been disconnected and that the necessary time has elapsed before removing motor and line power supply plugs.
2. The [OFF] button on the control panel of the adjustable frequency drive does not disconnect the line power supply and consequently it must
not be used as a safety switch.
3. The equipment must be properly grounded, 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 current exceeds 3.5 mA.
5. Protection against motor overload is not included in the factory setting. If this function is desired, set par.
1-90 Motor Thermal Protection
to
data value ETR trip 1 [4] or data value ETR warning 1 [3].
6. Do not remove the plugs for the motor and line power supply while the adjustable frequency drive is connected to line power. Make sure that
the line power supply has been disconnected and that the necessary time has elapsed before removing motor and line power plugs.
7. Please note that the adjustable frequency drive has more voltage sources than L1, L2 and L3, when load sharing (linking of DC intermediate
circuit) or external 24 V DC are installed. Make sure that all voltage sources have been disconnected and that the necessary time has elapsed
before commencing repair work.
2 Safety Instructions and General Warning
VLT
®
AutomationDrive FC 300 Instruction
Manual
2-2
MG.33.AB.22 - VLT is a registered Danfoss trademark
2