ABB ACSM1-04 Series Hardware Manual

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Contents

ABB ACSM1-04 Series Hardware Manual Manual pdf 6 page image

Safety instructions6Installation and maintenance workThese warnings are intended for all who work on the drive, motor cable or motor.WARNING! Ignoring the following instructions can cause physical injury or death, ordamage to the equipment.Only qualified electricians are allowed to install and maintain the drive.ï Never work on the drive, the motor cable or the motor when input power isapplied. After disconnecting the input power, always wait for 5 minutes to let theintermediate circuit capacitors discharge before you start working on the drive,the motor or the motor cable.Always ensure by measuring with a multimeter (impedance at least 1 Mohm)that:1. There is no voltage between the drive input phases U1, V1 and W1 and theground.2. There is no voltage between terminals UDC+ and UDCñ and the ground.3. There is no voltage between terminals R+ and Rñ and the ground.ï Drives controlling a permanent magnet motor: A rotating permanent magnetmotor feeds power to the drive causing the drive to become live even when it isstopped and the supply power switched off. Before maintenance work on thedrive,ñ disconnect the motor from the drive by using a safety switchñ prevent the start-up of any other motors in the same mechanical systemñ lock the motor shaftñ measure that the motor is in fact de-energised, then connect the U2, V2 andW2 terminals of the drive to each other and to the PE.ï Do not work on the control cables when power is applied to the drive or to theexternal control circuits. Externally supplied control circuits may carrydangerous voltages even when the input power of the drive is switched off.ï Do not make any insulation or voltage withstand tests on the drive.ï Disconnect the internal EMC filter of the drive (for directions, see page 49) if thedrive is to be installed on an IT power system (an ungrounded power system ora high resistance grounded [over 30 ohms] power system) or a corner-grounded power system.Notes:ï Even when the motor is stopped, dangerous voltages are present at the powercircuit terminals U1, V1, W1 and U2, V2, W2, and UDC+, UDCñ, R+, Rñ.ï Depending on the external wiring, dangerous voltages (115 V, 220 V or 230 V)may be present on the terminals of the relay output(s) of the drive.ï The drive supports the ìSafe Torque Offî function. See page 41.