Control Cabinet - Siemens SINAMICS G120 Hardware Installation Manual

Installing/mounting
4.1 EMC-compliant installation of a machine or system
4.1.1

Control cabinet

• Assign the various devices to zones in the control cabinet.
• Electromagnetically uncouple the zones from each other by means of one of the following
actions:
– Side clearance ≥ 25 cm
– Separate metal enclosure
– Large-area partition plates
• Route cables of various zones in separate cable harnesses or cable ducts.
• Install filters or isolation amplifiers at the interfaces of the zones.
Control cabinet assembly
• Connect the door, side panels, top and base plate of the control cabinet with the control
cabinet frame using one of the following methods:
– Electrical contact surface of several cm² for each contact location
– Several screw connections
– Short, finely stranded, braided copper wires with cross-sections
• Install a shield support for shielded cables that are routed out of the control cabinet.
• Connect the PE bar and the shield support to the control cabinet frame through a large
surface area to establish a good electrical connection.
• Mount the control cabinet components on a bare metal mounting plate.
• Connect the mounting plate to the control cabinet frame and PE bar and shield support
through a large surface area to establish a good electrical connection.
• For screw connections onto painted or anodized surfaces, establish a good conductive
contact using one of the following methods:
– Use special (serrated) contact washers that cut through the painted or anodized surface.
– Remove the insulating coating at the contact locations.
20
≥ 95 mm² / 000 (3/0) (‑2) AWG
Hardware Installation Manual, 04/2021, A5E36265179B-AB
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