Printed Circuit Boards; Grounding - ABB ACQ80-04 Series Hardware Manual

• Make sure that the electrical power network, motor/generator, and environmental
conditions agree with the drive data.
• Do not do insulation or voltage withstand tests on the drive.
• If you have a cardiac pacemaker or other electronic medical device, keep away
from the area near motor, drive, and the drive power cabling when the drive is in
operation. There are electromagnetic fields present which can interfere with the
function of such devices. This can cause a health hazard.
Note:
• When the drive is connected to the input power, the motor cable terminals and
the DC bus are at a dangerous voltage.
After disconnecting the drive from the input power, these remain at a dangerous
voltage until the intermediate circuit capacitors have discharged.
• External wiring can supply dangerous voltages to the relay outputs of the control
units of the drive.
• The Safe torque off function does not remove the voltage from the main and
auxiliary circuits. The function is not effective against deliberate sabotage or
misuse.

Printed circuit boards

WARNING!
Use a grounding wristband when you handle printed circuit boards. Do not
touch the boards unnecessarily. The boards contain components sensitive
to electrostatic discharge.
￭

Grounding

These instructions are for all personnel who are responsible for the grounding of the
drive.
WARNING!
Obey these instructions. If you ignore them, injury or death, or equipment
malfunction can occur, and electromagnetic interference can increase.
If you are not a qualified electrical professional, do not do grounding work.
• Always ground the drive, the motor and adjoining equipment. This is necessary
for the personnel safety.
• Make sure that the conductivity of the protective earth (PE) conductors is sufficient
and that other requirements are met. See the electrical planning instructions of
the drive. Obey the applicable national and local regulations.
• When using shielded cables, make a 360° grounding of the cable shields at the
cable entries to reduce electromagnetic emission and interference.
• In a multiple-drive installation, connect each drive separately to the protective
earth (PE) busbar of the power supply.
Safety instructions 15