12 Safety
• Even when the motor is stopped, dangerous voltage is present at the power
circuit terminals L1, L2, L3, U, V, W, R1, R2 (connector X1).
• If a motor is driven mechanically, it can generate hazardous voltages that are
conducted to its power terminals. The enclosure must be earthed/grounded to
prevent possible shock hazard.
• To prevent equipment damage, be certain that the input power has correctly sized
protective devices installed.
• To prevent equipment damage, be certain that input and output signals are
powered and referenced correctly.
• To ensure reliable performance of this equipment be certain that all signals
to/from the drive are shielded correctly.
• Do not tin (solder) exposed wires. Solder contracts over time and can cause loose
connections. Use crimp connections where possible.
• If the drive is subjected to high potential (‘hipot') testing, only DC voltages may be
applied. AC voltage hipot tests could damage the drive. For further information
please contact your local ABB representative.
• The safe integration of the drive into a machine system is the responsibility of the
machine designer. Be sure to comply with the local safety requirements at the
place where the machine is to be used. In Europe these are the Machinery
Directive, the ElectroMagnetic Compatibility Directive and the Low Voltage
Directive. In the United States this is the National Electrical code and local codes.
• To comply with CE directive 2004/108/EC an appropriate AC filter must be
installed.
• Motor overtemperature sensing is required to satisfy UL 508C. The drive has no
provisions for motor overtemperature protection, so external provisions are
required.
• Both the AC supply and the 24 V DC supply must be fused.
• The 24 V DC control circuit supply must be installed so that the 24 V DC supplied
to the unit is isolated from the AC supply using double or reinforced insulation, or
by using basic insulation with a protective earth.
• The input of the control circuit must be limited to Safety Extra Low Voltage circuits.
Permanent magnet motor drives
These are additional warnings concerning permanent magnet motor drives. Ignoring
the instructions can cause physical injury or death, or damage to the equipment.
WARNING! Do not work on the drive when the permanent magnet motor is
rotating. Also, when the supply power is switched off and the inverter 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:
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