Siemens SINAMICS S120 Manual page 444

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8.32 L61/L62, L64/L65, braking units
Safety information
CAUTION
A cooling clearance of 200 m must be maintained on all sides of the component (with
ventilation grilles).
CAUTION
The surface temperature of the braking resistors may exceed 80 °C during operation.
CAUTION
The cables for the braking resistor must be routed to prevent short-circuits and ground
faults in accordance with IEC 61800-5-2:2007, Table D.1.
This can be accomplished, for example, by:
• Eliminating the risk of mechanical damage to the cables
• Using cables with double insulation
• Maintaining adequate clearance, using spacers, for example
• Routing the cables in separate cable ducts or tubes
Note
The connecting cables to the Braking Module in the Basic Line Module, Smart Line Module,
Active Line Module, or Motor Module must be kept as short as possible (maximum of 100
m).
The braking resistors are only suitable for floor mounting.
The maximum cable length between the cabinet unit and braking resistor is 100 m.
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).
444
Cabinet Modules
Manual, (GH5), 05/2010, A5E03263538A