Dimensioning Mains Power Cables; Rcd Circuit Breaker - Siemens SINAMICS G180 Installation And Operating Instructions Manual

Electrical connection
6.5 Line supply connection
6.5.2

Dimensioning mains power cables

Dimensioning
● Voltage load
Use cables with at least U
● Current load
– Dimension the cable cross section according to the applicable standards, e.g.
– Determine the current of the mains power cable according to the inverter input current
– Use shielded mains power cables or cables with concentric protective earth conductor,
● Precaution against injury due to indirect contact
Use an overcurrent protection device with additional potential equalization on the motor in
order to avoid injuries due to indirect contact.
● Protective earth conductor
Due to the high leakage currents of the unit (> 3.5 mA), one or more of the following
conditions must be fulfilled for fixed connection of the protective earth conductor:
– The protective earth conductor must have a cross section of at least 10 mm
– Automatic tripping of the power supply in the event of interruption of the protective
– Installation of an additional terminal for a second protective earth conductor with the
6.5.3

RCD circuit breaker

High voltages
This product can cause a direct current in the protective earth conductor. When a residual
current device (RCD) or a residual current monitor (RCM) is used for protection in the event
of direct or indirect contact, only an RCD or RCM of type B is permissible on the power
supply side of this product.
94
VDE 0298.
which you can find on the rating plate.
type NYCWY, in order to reduce EMC interference.
16 mm Al
2
earth conductor
same cross section as the original protective earth conductor
WARNING
/U = 0.6/1 kV.
0
Installation and Operating Instructions SINAMICS G180
Operating Instructions, 02/2019, 4BS0751-007
Cu or
2