6.8.3 Procedure
To connect the power cables, proceed as follows:
1. Open the cabinet.
2. Remove or slide away the cover plate for the power cable entry.
3. Screw the PE protective conductor with an M12 screw at the locations provided in the
cabinet to the appropriate connection with the ground symbol. Observe the torque of 50 Nm.
On this topic, take note of section "Connecting ground (Page 85)".
4. Screw the connecting cable of the external braking resistor with the connections in the lower
area of the cabinet. To do this, follow the subsequent steps.
5. Insert the M12 screw into the corresponding terminal bar ①.
6. Attach the cable lug.
7. Attach the nuts and, if necessary, the washers. Tighten the nuts with a torque of 50 Nm.
8. Expose the cable shield. Secure the cable on the cable support bar using cable clips ②.
6.8.4 Shield connection
Only use shielded medium-voltage cables to reduce cable-conducted radio frequency
interference (RFI) and to achieve the appropriate EMC compatibility.
● The cable shield must be uninterrupted over the complete length of the cable and must
comprise non-magnetic material. Preferably use cables with foil-type shields.
● Do not connect other cable shields, power cables or control signals to the motor cable
shield. Powerful electrical interference and disturbances are induced in cables such as
these.
● For plants and systems distributed over a wide physical area, always use an equipotential
bonding conductor.
● Correctly connect armored cable using a cable gland. The cable armor must be connected
to the cable gland around its complete circumference. The gland itself must be in contact
with the gland plate around its complete circumference and must be connected to PE.
Electrical connection
6.8 Connecting power cables
SINAMICS PERFECT HARMONY GH150 6SL38253AE412AA1-Z
90 Operating Instructions Rev.201910281231 EXAMPLE
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