• If you have a permanent magnet motor connected to the
drive, disconnect the motor from the drive with a safety switch
or by other means.
• Disconnect any dangerous external voltages from the control
circuits.
• After you disconnect power from the drive, always wait 5
minutes to let the intermediate circuit capacitors discharge
before you continue.
3. Protect any other energized parts in the work location against
contact.
4. Take special precautions when close to bare conductors.
5. Measure that the installation is de-energized. If the measurement
requires removal or disassembly of shrouding or other cabinet
structures, obey the local laws and regulations applicable to live
working (including – but not limited to – electric shock and arc
protection).
• Use a multimeter with an impedance greater than 1 Mohm.
• Make sure that the voltage between the drive input power
terminals (L1, L2, L3) and the grounding (PE) busbar is close
to 0 V.
• Make sure that the voltage between the drive output terminals
(T1/U, T2/V, T3/W) and the grounding (PE) busbar is close
to 0 V.
• Make sure that the voltage between the drive DC busbars
(+ and -) and the grounding (PE) busbar is close to 0 V.
• Make sure that the voltage between the drive DC terminals
(R+/UDC+ and UDC-) and the grounding terminal (PE) is
close to 0 V.
WARNING!
The busbars inside the cabinet of liquid-cooled drives are
partially coated. Measurements made through the coating
are potentially unreliable, so only measure at uncoated
portions. Note that the coating does not constitute a safe
or touch-proof insulation.
Safety instructions 13
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