Siemens SINAMICS S220

Description
You must use line fuses or circuit breakers for overcurrent protection. The protective devices
used may result in power reductions.
More information
Detailed speci󹪝cations regarding protection equipment and their associated short-circuit rating
values are available on the Internet:
Protective Devices for SINAMICS S220 Line Modules Booksize (
https://
support.industry.siemens.com/cs/ww/en/view/109804134)
6.3.2 Overcurrent protection using residual current devices (RCD)
6.3.2.1 Residual current protective devices (RCD)
Overview
Residual current devices can be optionally used as overcurrent protection devices. Residual
current devices additionally provide preventive 󹪝re protection in the case of insulation faults,
e.g. for applications in facilities with a risk of 󹪝re.
Requirement
WARNING
Electric shock or 󹪝re when using unsuitable residual current devices
In the case of a fault, converters can generate smooth residual currents, rendering type A or
type AC residual current devices unusable.
• Use the recommended type B residual current devices to protect converters.
• If higher-level residual current devices are used, these must also be type B devices.
Description
Residual current devices (RCDs) have to be installed if the power supply conditions in terms of
short-circuit power and loop impedance at the infeed point are not such that the installed
overcurrent protection devices will trip within the prescribed period if a fault occurs.
Line-side power components
6.3Overcurrent protective devices
Booksize power units
Equipment Manual, 09/2023, A5E53307519B AA 99