ABB ACS850 general-purpose frequency converter

What this chapter contains This chapter contains the safety instructions which you must follow when installing, operating and servicing the drive. If ignored, physical injury or death may follow, or damage may occur to the drive, motor or driven equipment. Read the safety instructions before you work on the unit. Use of warnings Warnings caution you about conditions which can result in serious injury or death and/or damage to the equipment and advise on how to avoid the danger. The following warning symbols are used in this manualElectricity warning warns of hazards from electricity which can cause physical injury and/or damage to the equipment. General warning warns about conditions, other than those caused by electricity which can result in physical injury and/or damage to the equipment. Electrostatic sensitive devices warning warns of electrostatic discharge which can damage the equipment. Hot surface warning warns of component surfaces that may become hot enough to cause burns if touched.

Safety in installation and maintenance Electr

ical safety These 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, or damage to the equipment: • Only qualified electricians are allowed to install and maintain the drive. • Never work on the drive, motor cable or motor when main power is applied. After disconnecting the input power, always wait for 5 min 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: 1. voltage between drive input phases U1, V1 and W1 and the frame is close to 0 V. 2. voltage between terminals UDC+ and UDC- and the frame is close to 0 V. • Do not work on the control cables when power is applied to the drive or to the external control circuits. Externally supplied control circuits may cause dangerous voltages inside the drive even when the main power on the drive is switched off. • Do not make any insulation or voltage withstand tests on the drive or drive modules. Note: • The motor cable terminals on the drive are at a dangerously high voltage when the input power is on, regardless of whether the motor is running or not. • The brake control terminals (UDC+, UDC-, R+ and R- terminals) carry a dangerous DC voltage (over 500 V). • Depending on the external wiring, dangerous voltages (115 V, 220 V or 230 V) may be present on the terminals of relay outputs (X2) or Safe torque off (X6). • The Safe torque off function does not remove the voltage from the main and auxiliary circuits.

Grounding These instructions are intended for all who are responsible for the grounding of the drive. WARNING! Ignoring the following instructions can cause physical injury, death, increased electromagnetic interference and equipment malfunction: • Ground the drive, motor and adjoining equipment to ensure personnel safety in all circumstances, and to reduce electromagnetic emission and interference. • Make sure that grounding conductors are adequately sized as required by safety regulations. • In a multiple-drive installation, connect each drive separately to protective earth (PE). • Where EMC emissions must be minimized, make a 360° high frequency grounding of cable entries at the cabinet lead-through in order to suppress electromagnetic disturbances. In addition, connect the cable shields to protective earth (PE) in order to meet safety regulations. Note: • Power cable shields are suitable for equipment grounding conductors only when adequately sized to meet safety regulations. • As the normal leakage current of the drive is higher than 3.5 mA AC or 10 mA DC, a fixed protective earth connection is required by EN 61800-5-1, 4.3.5.5.2.

Permanent magnet motor drives These are additional warnings concerning permanent magnet motor drives. WARNING! Ignoring the instructions can cause physical injury or death, or damage to the equipment. • Do not work on the drive when the permanent magnet motor is rotating. Also, when the supply power is switched off and the drive is stopped, a rotating permanent magnet motor feeds power to the intermediate circuit of the drive and the supply connections become live. Before installation and maintenance work on the drive: • Stop the motor. • Ensure that there is no voltage on the drive power terminals according to step 1 or 2, or if possible, according to the both steps. 1. Disconnect the motor from the drive with a safety switch or by other means. Measure that there is no voltage present on the drive input, output or DC terminals (U1, V1, W1, U2, V2, W2, UDC+, UDC-). 2. Ensure that the motor cannot rotate during work. Make sure that no other system, like hydraulic crawling drives, is able to rotate the motor directly or through any mechanical connection like felt, nip, rope, etc. Measure that there is no voltage present on the drive input, output or DC terminals (U1, V1, W1, U2, V2, W2, UDC+, UDC-). Ground the drive output terminals temporarily by connecting them together as well as to the PE.