Siemens SINAMICS G110M, Руководство по эксплуатации, Страница: 68 / 428

Dimensioning the protective conductor
Observe the local regulations for protective conductors subject to an increased leakage current
at the installation site.
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/
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3(
①
Protective conductor for line feeder cables
②
Protective conductor for converter line feeder cables
③
Protective conductor between PE and the electrical cabinet
The minimum cross-section of the protective conductor
①
…
③
depends on the cross-section
of the line feeder cable:
• Line feeder cable ≤ 16 mm
2
⇒ Minimum cross-section of the protective conductor = cross-section of the line feeder cable
• 16 mm² < line feeder cable ≤ 35 mm
2
⇒ Minimum cross-section of the protective conductor = 16 mm
2
• Line feeder cable > 35 mm
2
⇒ Minimum cross-section of the protective conductor = ½ cross-section of the line feeder
cable
Additional requirements placed on the protective conductor
①
:
• For permanent connection, the protective conductor must fulfill 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 two 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.
Installation
4.3 Electrical Installation
Distributed converter for SIMOGEAR geared motors
66
Operating Instructions, 10/2020, FW V4.7 SP13, A5E31298649B AL