Electrical safety precautionsThese electrical safety precautions are for all personnel who do work on the drive, motorcable or motor.WARNING!Obey these instructions. If you ignore them, injury or death, or damage to theequipment can occur.If you are not a qualified electrician, do not do installation or maintenance work.Go through these steps before you begin any installation or maintenance work.1. Keep the cabinet doors closed when the drive is powered. With the doors open, a riskof a potentially fatal electric shock, arc flash or high-energy arc blast exists.2. Clearly identify the work location and equipment.3. Disconnect all possible voltage sources. Lock out and tag out.• Open the main disconnecting device of the drive.• Open the charging switch if present.• Open the disconnector of the supply transformer. (The main disconnecting devicein the drive cabinet does not disconnect the voltage from the AC input power busbarsof the drive cabinet.)• If the drive is equipped with a DC/DC converter unit (optional): Open the DCswitch/disconnector ([Q11], option +F286) of the DC/DC converter. Open thedisconnecting device of the energy storage connected to the DC/DC converter unit(outside the drive cabinet).• Open the auxiliary voltage switch-disconnector (if present), and all other possibledisconnecting devices that isolate the drive from dangerous voltage sources.• In the liquid cooling unit (if present), open the motor protective circuit breaker(s) ofthe cooling pumps.• If you have a permanent magnet motor connected to the drive, disconnect the motorfrom the drive with a safety switch or by other means.• Make sure that re-connection is not possible. Lock out and tag out.• Disconnect any dangerous external voltages from the control circuits.• After you disconnect power from the drive, always wait 5 minutes to let theintermediate circuit capacitors discharge before you continue.4. Protect any other energized parts in the work location against contact.5. Take special precautions when close to bare conductors.6. Measure that the installation is de-energized. If the measurement requires removal ordisassembly of shrouding or other cabinet structures, obey the local laws and regulationsapplicable to live working (including – but not limited to – electric shock and arcprotection).• 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 DC busbars (+ and -) and thegrounding (PE) busbar is close to 0 V.• If you have a permanent magnet motor connected to the drive, make sure that thevoltage between the drive output terminals (T1/U, T2/V, T3/W) and the grounding(PE) busbar is close to 0 V.60 Electrical installation
