TAM 00682 14
DSC 045-100 07 / 2012
Three-phase synchronous motor English
• The rotor rotates smoothly without a scraping sound.
On motors with a brake fitted, release the brake beforehand.
• the design of the motor and encoder cables – and of the fan cable (if available), complies with
the details in the technical documentation that accompanies the product.
• The output and input elements are secured.
• the complete cooling circuit is leak proof and fully functional and protected against any foreign
objects falling into it.
4 Electrical connections
Important notes:
All work must be carried out by specially trained personnel.
Work must only be carried out when the system has been de-energized and secured
against unintentional restarting (including auxiliary circuits).
Work must only be carried out once the motor has come to a standstill.
In the case of three-phase synchronous motors with permanent-magnet excitation, a
voltage of > 60 V can occur at the motor contacts when the rotor is turning.
Regulations for working in electrical plants must be observed!
Attention! The safety regulations for work in electrotechnical systems must be observed
according to EN 50110-1:
• 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 sensors with your hands or with
tools that are 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 its modules (brake, encoder, fan, etc.) must be connected in accordance with
the details in the wiring diagrams (see enclosed wiring diagrams and Section 8).
• 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.
• In the interest of ensuring operational safety, we recommend that you use connecting cables
assembled by Baumüller (see Technical Product List).
• Before connection, the plugs, sockets and the terminal boxes must be checked for damage,
corrosion, dirt and dampness.
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