Siemens SINAMICS S220

Requirement
NOTICE
Damage to the drive electronics when switching the disconnector unit under load
Switching the disconnector unit under load will cause the contacts to wear prematurely. This
can cause the disconnector unit to malfunction, with subsequent damage to the drive
electronics.
• Use a leading switch-o󹪜 auxiliary contact or use a Voltage Sensing Module (VSM10).
• If this is not possible, then avoid switching the disconnector unit under load.
Description
The locally applicable regulations must be observed when selecting a disconnector unit.
The accessories required for the disconnector unit can be found in the manufacturer catalogs.
6.3 Overcurrent protective devices
6.3.1 Overcurrent protection using fuses and circuit breakers
Overview
Line-side protective devices must be used to ensure the components and their line supply cables
are protected.
Requirement
WARNING
Electric shock or 󹪝re due to overcurrent protective devices that trip too late or not at all
Overcurrent protective devices that trip too late or not all can cause electric shock or 󹪝re.
• In the case of a conductor-conductor or conductor-ground short-circuit, ensure that the
short-circuit current at the point where the converter is connected to the line supply
corresponds as a minimum to the requirements of the protective device used.
• You must additionally use a residual current device (RCD) if, for a conductor-ground short
circuit, the required short-circuit current is not reached. The required short-circuit current
can be too low, especially for TT line supply systems.
• The short-circuit current must not exceed the SCCR of the converter and the breaking
capacity of the protective device.
Line-side power components
6.3Overcurrent protective devices
Booksize power units
98 Equipment Manual, 09/2023, A5E53307519B AA