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4.3 Permissible mains supply network configurations for motors
4.3
Permissible mains supply network configurations for motors
Description
In combination with the drive system, the motors are generally certified for operation on TN and
TT line systems with grounded neutral point and on IT line systems.
The following special features should be noted:
• For operation on IT line systems, the occurrence of the first fault between an active part and
ground must be signaled by a monitoring device. According to IEC 60364‑4‑41, it is
recommended that the first fault is removed as quickly as practically possible.
Motor operation in such a fault situation can reduce the service life due to a damage
insulation system as a result of partial discharge.
• For 3 AC 380 V ... 480 V mains supply networks with a grounded line conductor, an isolating
transformer with grounded neutral point (secondary side) must be connected between the
mains supply and the drive system to protect the motor insulation from excessive stress.
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SINAMICS S200 pulse train servo drive system with SIMOTICS S-1FL2
Operating Instructions, 11/2023, FW V6.3, A5E51646767B AA
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