6
3GZF500725-144 EN 03-2023 | ABB IEC LV MOTORS
Operations must only be carried out by skilled persons while the machine is non-operational.
Before starting work, the following safety rules must be strictly applied:
•
De-energize!
•
Provide safeguard against reclosing!
•
Prevent any rotation of the shaft before opening the terminal box and/or working
at the unprotected terminals.
•
Verify safe isolation from supply!
•
Connect to earth and short!
•
Cover or provide barriers against neighbouring live parts!
•
De-energize auxiliary circuits (e.g. anti-condensation heating)!
Rating plate markings and connection diagrams must be followed. Check the compatibility of
the machine and the frequency converter.
The connection must be made so that a permanent safe electrical connection is maintained.
Use appropriate cable terminals. Establish and maintain safe equipotential bonding.
No foreign bodies, dirt or moisture is allowed in the terminal box. Always close unused cable
entrance holes and the box itself in a dust and watertight manner. Lock the key when the ma-
chine is run without coupling. For machines with accessories, check that they function before
commissioning.
The proper installation (e.g. segregation of signal and power lines, screened cables etc.) lies
within the installer's responsibility.
4.
Operation
Do not exceed the maximum allowed speed of the machine. See product specific manuals.
Check the vibration level of the machine regularly. In case of deviations from normal opera-
tion - e.g. elevated temperature, noises, vibrations - disconnect the machine. If necessary, es-
tablish cause and consult manufacturer, if necessary.
Do not override protective devices, not even in trial run. In case of heavy dirt deposits, clean
the cooling system at regular intervals.
Make sure that condensation drain plugs are open and clean. Drain plugs, if requested, are
located at the lower part of the end shields to allow condensation to escape from the motor.
Open the drain plug by turning it counter- clockwise. Tap it to check its free operation and
close it by pressing and screwing it clockwise. Drain plugs should be operated in regular in-
tervals (see figure 1).
