TAM 00682 15
DSC 045-100 07 / 2012
Three-phase synchronous motor English
• In order to ensure the appropriate type of protection is provided, make sure that the screwed
connections, gaskets, and sealing surfaces of the connectors are seated correctly and are
tight.
Note! Also, to maintain the safety class, the rotating connecting boxes should not be modified
by more than 5 times in the connecting direction by turning.
• Connectors must not be exposed to mechanical stress. If necessary, provide strain, shearing,
twist, and anti-kink relief
In case of connection using a terminal box it is to be ensured
• the insulation is not over stripped, i. e. that the insulation extends right up to the cable lugs or
terminals. The ends of the cables must not protrude.
• the cable lugs that are used are suitable for the dimensions and cross-sections of the
terminals and cables.
• the screwed electrical connections are tightened in accordance with the specified tightening
torque (comp. Section 8.3 table 5).
• the protection type is maintained.
Note: All lead-ins that are not used must be closed off with the sealing caps. The sealing
elements must be fully functional and undamaged when closing the terminal box.
5 Commissioning, operation
5.1 Safety instructions
Working on the electric motor:
Work must not be carried out on the electric motor until the motor has come to a
standstill, is electrically isolated, and has cooled down. All connections, such as screw
connections, that were loosened when working on the motor must be tightened again
prior to commissioning.
When carrying out work on the motor, please observe the technical instructions and
notes in the respective sections in these Commissioning and Maintenance
Instructions.
Attention: if the optional holding brake is fitted, this brake must not perform a safety
function during work on the motor (e. g., retaining loads)!
Risk of fatality due to electric shock:
Make sure that the motor is disconnected and electrically isolated.
Never disconnect the motor connections during operation.
Only connect measuring instruments when the motor is disconnected from the power
supply and electrically isolated.
Only commence work on the motor connections when you are sure the motor is
electrically isolated and there is no potential.
When in operation, electric potential can be found at the motor contacts and at the
motor windings. Never touch these modules/elements while the motor is in operation.
Installing and uninstalling safety devices:
The electric motor must not be operated without installed safety devices.
The motor must be put out of operation when installing and dismantling components
and systems which are provided for monitoring the motor for safe operation
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