Velocity Edge GX440 Instructions d'exploitation Page 55

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Electrical installation
4.6 Power connections
Drive converter cabinet units
Operating Instructions, 10/2008, A5E00288214A
55
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 EN61800-3
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 section 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 in order to feed through the
motor and power cables.
3. Screw the protective earth (PE) into the appropriate terminal (with earth symbol) (50 Nm
for M12) at the points provided in the cabinet.
4. Connect the motor and power cables to the terminals.
Make sure that you connect the conductors in the correct sequence: U2/T1, V2/T2,
W2/T3 and U1/L1, V1/L2, W1/L3.
CAUTION
Tighten the screws with the appropriate torque (50 Nm for M12), otherwise the terminal
contacts could be destroyed by burning during operation.
Note
The motor ground must be fed back directly to the cabinet unit and connected.
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