ABB ACS800 Hardware Manual page 7

Note:
•
The main disconnecting device (main breaker or main switch-disconnector)
does not switch off the voltage from the auxiliary circuits or the input busbars.
•
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 relay outputs of the drive system.
•
The Prevention of unexpected start-up function does not remove the voltage
from the main and auxiliary circuits.
•
The Safe torque off function does not remove the voltage from the main and
auxiliary circuits.
WARNING!
•
During the installation procedure, the inverter modules may have to be
temporarily extracted from the cabinet. The modules have a high center of
gravity. In order to minimise the danger of toppling over, keep the support legs
of the modules extended whenever manoeuvring the modules outside the
cabinet.
•
Electrically conductive dust inside the unit may cause damage or lead to
malfunction. Make sure that dust from drilling does not enter the drive when
installing.
•
Fastening the cabinet by riveting or welding is not recommended. However, if
welding is necessary, ensure the return wire is properly connected in order not
to damage the electronic equipment in the cabinet. Also ensure that welding
fumes are not inhaled.
•
Ensure sufficient cooling of the unit.
•
Cooling fans may continue to rotate for a while after the disconnection of the
electrical supply.
•
Some parts inside the drive cabinet, such as heatsinks of power
semiconductors, remain hot for a while after the disconnection of the electrical
supply.
WARNING!
•
The printed circuit boards contain components sensitive to electrostatic
discharge. Wear a grounding wrist band when handling the boards. Do not
touch the boards unnecessarily.
7
Safety instructions