Siemens SINAMICS G220 - Page 71

The minimum cross-section of the protective conductors ① … ④ depends on the cross-
section of the power supply or motor connection cable:
• Power supply or motor connection cable ≤ 16mm
2
⇒ Minimum cross-section of the protective conductor = cross-section of the power supply or
motor connection cable
• 16mm² < power supply or motor connection cable ≤ 35mm
2
⇒ Minimum cross-section of the protective conductor = 16mm
2
• Power supply or motor connection cable > 35mm
2
⇒ Minimum cross-section of the protective conductor = ½ cross-section of the power supply
or motor connection cable
Additional requirements placed on the protective conductors ① and ② according to
IEC60204-1:
• For permanent connection, the protective conductor must ful󹪝ll at least one of the following
conditions:
– The protective conductor is routed so that it is protected against damage along its
complete length.
Cables routed inside electrical cabinets or enclosed machine housings are considered to
be adequately protected against mechanical damage.
– As a conductor of a multi-conductor cable, the protective conductor has a cross-section ≥
2.5mm² Cu.
– For an individual conductor, the protective conductor has a cross-section ≥ 10mm² Cu.
– The protective conductor consists of 2 individual conductors with the same cross-section.
• When connecting a multi-conductor cable using an industrial plug connector according to
EN60309, the protective conductor must have a cross-section of ≥2.5mm²Cu.
• Observe the local regulations for protective conductors subject to a high leakage current at
the operating location.
Application planning
4.5Requirements for the protective conductor, converter in degree of protection IP55
SINAMICS G220 converter
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB 69