Connecting The Motor And Power Cables - Siemens SINAMICS G150 Operating Manual

11/03
NOTE
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 EN55011 regarding radio interference suppression,
the shield must contact at both ends and 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.
4.6.2

Connecting the Motor and Power Cables

Connecting the Motor and Power Cables on the Cabinet Unit
NOTE
The location of the connections is indicated in the layout diagrams provided in 3.
1. Open the cabinet, remove the covers (if necessary) in front of the connection
panel for motor cables (terminals U2/T1, V2/T2, W2/T3; X2) and power cables
(terminals U1/L1, V1/L2, W1/L3; X1).
2. Move or remove the bottom plate below the connection panel through which the
motor cables are fed.
3. Screw the protective earth (PE) into the appropriate terminal (with earth symbol)
(50 Nm with M12) at the points provided in the cabinet.
NOTE
With version C, connect the power cables first and then the motor cables.
4. Screw the motor cables into the terminals.
Ensure that you have followed the correct sequence for connecting the
conductors: U2/T1, V2/T2, W2/T3 and U1/L1, V1/L2, W1/L3!
CAUTION
Tighten the screws with the appropriate torque (50 Nm with M12), otherwise the
terminal contacts could catch fire during operation.
NOTE
The motor ground must be fed back directly to the cabinet unit and connected.
SINAMICS G150
Operating Manual
Electrical Installation
4-11