Siemens SIMOTICS M-1PH1, Equipment Manual, Page: 71 / 134

1PH1 main motors
Equipment Manual, 09/2021, A5E51077676A-AA
69
Electrical connection
6
6.1 Permissible line system configurations
In combination with the drive system, the motors are generally approved for operation on TN
and TT systems with grounded neutral and on IT systems.
In operation on IT systems, the occurrence of the first fault between an active part and the
ground must be signaled by a monitoring device. In accordance with IEC 60364-4-41, it is
recommended that the first fault is eliminated as quickly as possible.
In systems with a grounded external conductor, an isolating transformer with grounded
neutral (secondary side) must be connected between the line supply and the drive system to
protect the motor insulation from excessive stress. The majority of TT systems have a
grounded external conductor, and thus in this case an isolating transformer must be used.
6.2 Circuit diagram of the motor
You can find information on the circuit and on connecting the motor winding and auxiliary
equipment (for example, the encoder) in the circuit diagram. The circuit diagram is provided
in the motor terminal box for the cable connection.
6.3 Connecting the external fan
Technical data
Shaft height Supply voltage Frequency Rated current Rated power
100 mm 3 AC 380 V 50 Hz 0.12 A 52 W
132 mm 3 AC 380 V 50 Hz 0.18 A 40 W
For more information about the ventilation data and sound pressure level, see Sections
"Cooling (Page 28)" and "Noise emission (Page 48)" respectively.