Motor Reactors; Description; Safety Information - Siemens SINAMICS S120 Equipment Manual

7.2

Motor reactors

7.2.1

Description

Motor reactors reduce the voltage stress on the motor windings by reducing the voltage
gradients at the motor terminals that occur when motors are fed from drive converters. At the
same time, the capacitive re-charging currents that additionally load the output of the Power
Modules or Motor Modules when longer motor cables are used are simultaneously reduced.
7.2.2

Safety information

Danger to life if the fundamental safety instructions and remaining risks are not carefully
observed
The non-observance of the fundamental safety instructions and residual risks stated in
Chapter 1 can result in accidents with severe injuries or death.
• Adhere to the fundamental safety instructions.
• When assessing the risk, take into account residual risks.
Fire hazard due to overheating because of inadequate ventilation clearances
Inadequate ventilation clearances can cause overheating with a risk for personnel through
smoke development and fire. Furthermore, an increased number of failures and shorter
service life of the components can occur.
• Maintain 100 mm ventilation clearances above and to the side of the component.
Risk of burns resulting from high surface temperature of the motor reactor
The surface temperature of the motor reactors can exceed 80 °C. You can get seriously
burnt when touching the surface.
• Mount the motor reactor so that it cannot be touched. If this is not possible, attach a
Water-cooled chassis power units for common cooling circuits
Manual, 08/2017, 6SL3097-4AM10-0BP0
WARNING
WARNING
CAUTION
clearly visible and understandable warning notice at hazardous positions.
Motor-side power components
7.2 Motor reactors
185