Safety 11
Safety
Safety in installation and maintenance
These warnings are intended for all who work on the drive, motor cable or motor.
Electrical safety
WARNING! Ignoring the following instructions can cause physical injury or
death, or damage to the equipment.
Only qualified electricians are allowed to install and maintain the drive!
• Be sure the system is properly earthed/grounded before applying power. Do not
apply AC power before earths/grounds are connected.
• Never work on the drive, motor cable or motor when input power is applied. After
disconnecting the input power, always wait for 5 minutes to let the intermediate
circuit capacitors discharge before you start working on the drive, motor or motor
cable. Always ensure by measuring with a multimeter (impedance at least
1 Mohm) that there is no voltage between the drive input phases L1, L2 and L3
and the ground.
• Do not work on the control cables when power is applied to the drive or to the
external control circuits. Externally supplied control circuits can carry dangerous
voltage even when the input power of the drive is switched off.
• Do not make any insulation or voltage withstand tests on the drive.
• All ELV (extra low voltage) circuits connected to the drive must be used within a
zone of equipotential bonding, i.e. within a zone where all simultaneously
accessible conductive parts are electrically connected to prevent hazardous
voltages appearing between them. This is accomplished by proper factory
grounding.
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