Siemens SINAMICS G120P, Operating Instructions Manual

Page: 63 / 496

Electrical installation
4.6 Power connections
Inverter cabinet units
Operating Instructions, 12/2014, A5E32923362A
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4.6.2 Connection cross-sections, cable lengths
Connection cross-sections
The connection cross-sections for the line connection, motor connection, and ground
connection for your device are specified in the tables provided in the "Technical
specifications" section.
Cable lengths
The maximum permissible cable lengths are specified for standard cable types or cable
types recommended by SIEMENS. Longer cables can only be used after consultation.
The listed cable length represents the actual distance between the inverter and the motor,
taking into account factors such as parallel laying, current-carrying capacity, and the laying
factor.
● Unshielded cable (e.g. Protodur NYY):
–
Without motor-side reactors / dv/dt filter: max. 200 m
– With motor-side reactors / dv/dt filter: max. 450 m
● Shielded cable (e.g. Protodur NYCWY, Protoflex EMV 3 Plus):
–
Without motor-side reactors / dv/dt filter: max. 100 m
– With motor-side reactors / dv/dt filter: max. 300 m
Note
Shielded cables
The PROTOFLEX-EMV-3 PLUS shielded cable recommended by Siemens is the protective
conductor and comprises three symmetrically-arranged protective conductors. The individual
protective conductors must each be provided with cable eyes and be connected to ground.
The cable also has a concentric flexible braided copper shield. To comply with EN 61800-3
regarding radio interference suppression, the shield must be grounded at both ends with the
greatest possible surface area.
On the motor side, cable glands that contact the shield with the greatest possible surface
area are recommended for the terminal boxes.