Power Connections - Siemens Sinamics G120P Operating Instructions Manual

I/O interfacing
● Create a low-impedance ground connection for additional cabinets, system components,
and distributed devices with the largest possible cross-section (at least 16 mm²).
● Ground unused lines at one end in the cabinet.
● Select the highest possible distance between the energy and signal cables, with a
minimum of 20 cm at the very least. The greater the distance over which the cables are
routed in parallel, the greater the clearance must be. If a sufficient clearance cannot be
maintained, you must install additional shields.
● Avoid unnecessarily long cable loops.
Filtering cables
● Line supply cables and power supply cables for devices and modules may have to be
filtered in the cabinet to reduce incoming or outgoing disturbances.
● To reduce emissions, the device is equipped with a radio interference suppression filter
as standard (in accordance with the limit values defined in category C3). Optional filters
can be fitted for use in the first environment (category C2).
Protective ground conductors
● According to EN 61800-5-1, Section. 6.3.6.7, the minimum cross-section of the protective
ground conductor must conform to the local safety regulations for protective ground
conductors for equipment with a high leakage current.
4.6

Power connections

Danger to life through electric shock caused by the interchanging or short-circuiting of the
device connections
The interchanging of the power connections or the short-circuiting of the DC-link
connections would damage the device that can cause death or severe injuries.
• Do not interchange input and output terminals of the device.
• Do not interchange or short-circuit the DC-link terminals.
Note
Ground leakage circuit-breaker
The device must not be operated via a ground leakage circuit-breaker (EN 61800-5-1).
Inverter cabinet units
Operating Instructions, 12/2014, A5E32923362A
WARNING
Electrical installation
4.6 Power connections
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