Safety Information - Siemens SINAMICS S120 Manual

5.2.2

Safety information

NOTICE
Maintain ventilation clearances
A ventilation clearance of 200 m must be maintained on all sides of the component (with
ventilation meshes).
Risk of fire and damage to equipment due to short-circuit / ground fault
The cables to the braking resistor must be routed so that a ground fault or short-circuit can
be ruled out. A ground fault can result in fire with smoke.
• Protect the cables from mechanical damage.
• Comply with local installation regulations that enable this fault to be ruled out.
In addition, apply one of the following measures:
• Use cables with double insulation.
• Maintain adequate clearance, using spacers, for example.
• Route the cables in separate cable ducts or pipes.
Note
Notes regarding the installation
The connecting cables to the Braking Module in the Line Module or Motor Module must be
kept as short as possible (max. 100 m).
The braking resistors are only suitable for floor mounting.
Sufficient space must be available for dissipating the energy converted by the braking
resistor.
A sufficient distance from flammable objects must be ensured.
The braking resistor must be installed as a free-standing unit.
Objects must not be placed on or anywhere above the braking resistor.
The braking resistor should not be installed underneath fire detection systems, since these
could be triggered by the resulting heat.
For outdoor installation, a hood should be provided to protect the braking resistor against
precipitation (in accordance with degree of protection IP20).
Hot surfaces
The surface temperature of the braking resistors may exceed 80° C.
Chassis power units
Manual, (GH3), 01/2013, 6SL3097-4AE00-0BP3
WARNING
CAUTION
DC link components
5.2 Braking resistors
243