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Electrical installation
4.6 Power connections
4.6.2
Connection cross-sections, cable lengths
Conductor cross-sections
The conductor 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 drive and the motor,
taking into account factors such as parallel laying, current-carrying capacity, and the laying
factor.
● Unshielded cable (e.g., Protodur NYY): max. 1485 ft (450 m)
● Shielded cable (e.g., Protodur NYCWY, Protoflex EMV 3 Plus): max. 990 ft (300 m).
Note
Cable lengths
The cable lengths specified are also valid if a motor reactor is used (option L08).
Note
Shielded cables
The PROTOFLEX-EMV-3 PLUS shielded cable recommended by Siemens has three
symmetrically-arranged ground conductors. Each ground conductor must be fitted with cable
lugs and connected to ground. The cable also has a concentric flexible braided copper
shield. To comply with IEC 61800-3 regarding radio interference suppression, the shield
must be contacted 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.
66
Converter cabinet units
Operating Instructions, 11/2017, A5E36652151A
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