3.3 Electrical connections
Important notes:
All work must be carried out by specially trained personnel.
Work must only be carried out when the system is electrically isolated and secured
against unintentional restarting (also auxiliary circuits).
Work must only be carried out once the motor has come to a standstill.
Regulations for working in electrical plants must be observed!
The safety regulations for work on electrotechnical systems in accordance with EN 50110-1 must
be followed:
• Isolate
• Secure against unintentional restarting
• Verify safe isolation from the supply
• Earth and short
• Safeguard or cover adjacent live parts
The electric motor must be operated via a correspondingly designed converter. A
direct connection to the three-phase mains can destroy the motor.
Ensure that the phase sequence and the pin assignment are correct!
Electrical connections, protective conductor connections, and screen connections
(when using screened cables) must be permanently secure!
Never touch the contacts of the encoder or thermal sensor with your hands or with
tools which are or may be electrostatically charged. The encoder and the thermal
sensors are electrostatically sensitive components.
Electrical installation:
• The person setting up the system is responsible for correct electrical installation.
• The motor data on the nameplate must be observed.
• Connection cables and connectors must be correctly rated for the voltages and currents and
must be suitable for the method of installation employed.
• The motor and the modules (brake and encoder etc.) must be connected in accordance with
the details on the wiring diagrams (see enclosed wiring diagrams or Appendix 1).
• Screened power and encoder cables must be used to protect against electromagnetic EMC
interference from motor cables and their effects on the encoder and control systems. Please
refer to the EMC notes provided by the supplier of the converter.
• To enhance operational safety, we recommend the ready-made connection cables from
Baumüller be used.
• Before connection, the plugs, sockets and the terminal boxes must be checked for damage,
corrosion, dirt and dampness.
• Ensure the connections are made correctly and are tight. Seals and sealing faces on the
connectors and the terminal boxes maintain the type of protection.
Note! Also in the interests of safeguarding the degree of protection, the rotatable junction
boxes should not be turned in their direction of connection more than 5 times altogether.
• Connectors and terminal box connections must not be exposed to mechanical stress. If
necessary, protect against strain, shearing, twisting and kinking.
In case of connection using a terminal box it is to be ensured
• The insulation is only stripped off the ends of the wires such that the insulation reaches close
to the cable boot or terminal. It is imperative that there must be no protruding wire ends.
• The cable boots used match the dimensions and cross-sections of the terminals and wires.
TAM 00612 14
DA 100 – 280 W 06 / 2011
Three-phase synchronous motor water-cooled English
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