Electrical connection
8.3 System integration
S-1FT7 synchronous motors
368 Configuration Manual, 09/2018, A5E45099423B AA
Destruction of the motor if it is directly connected to the three-phase line supply
The motor will be destroyed if it is directly connected to the three-phase line supply.
• Only operate the motors with the appropriately configured converters.
Damage to electronic components as a result of electrostatic discharge
Electrostatically sensitive devices (ESD) can be damaged or destroyed by electrostatic
discharge.
• Observe the ESD protection measures.
• Only grounded personnel with grounded tools may touch the component connections.
• Heed the EMC information provided by the manufacturer of the converter.
● Use prefabricated cables from SIEMENS (not in the scope of delivery). These cables
reduce installation costs and increase the operational reliability, see Chapter, "MOTION-
CONNECT connection systems" in Catalog D 21.4 (
https://intranet.for.siemens.com/org/i-
dt-mc/de/motion-control/support/infomaterial/kataloge/d-21-4-sinamics-s120-
simotics/Seiten/d-21-4.aspx).
● The manufacturer of the system/machine is responsible for the proper installation.
● Observe the data on the rating plate and the circuit diagrams.
● Adapt the connecting cables to the type of use and the voltages and currents that occur.
● When fed from a converter, high-frequency current and voltage oscillations in the motor
feeder cables can cause electromagnetic interference. Therefore, use shielded power
cables.
● Make sure that the inside of the connector is clean and free of cable cuttings and
moisture.
● Avoid protruding wire ends.
● Check that the degree of protection is complied with at the seals and sealing surfaces of
the connectors.
● Secure connecting cables against torsion, tensile and compressive strain, and protect
them against kinking. It is not permissible to subject the connector to continuous force.
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