Siemens SINAMICS S120 Manual page 76
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Also See for SINAMICS S120:
- Function manual (1094 pages) ,
- Diagnostic manual (947 pages) ,
- Manual (848 pages)
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Mains connection and line-side power components
3.9 Line connection variants
IT system
In an IT system, the voltage network is either not connected with ground or connected only
using a high-resistance impedance. The housing of the consumer is connected with the
ground using a separate cable.
Figure 3-17
● Power Modules without a line filter can be operated in all IT systems.
● Power Modules with an integrated or external line filter can be operated only in IT
systems.
NOTICE
Damage of the drive line-up when operating on an IT system without a motor reactor
If the drive unit is operated without a motor reactor in an IT system, a ground fault on the
motor side of the Power Modules can cause damage to the drive line-up or trip the
overcurrent protective equipment.
• We recommend that a motor reactor is used to provide better protection.
76
IT system
Manual, (GH6), 07/2016, 6SL3097-4AL00-0BP5
AC Drive
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