Siemens S120 Manual page 205

Risk of fire and device damage as a result of ground fault / short-circuit
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 associated smoke.
• Comply with local installation regulations, which allow this fault to be ruled out.
• Protect the cables from mechanical damage.
• In addition, apply one of the following measures:
Risk of burns resulting from high surface temperature of the braking resistor
The braking resistor can become very hot. You can be severely burnt when touching the
surface.
• Mount the braking resistor so that it cannot be touched. If this is not possible, at the
Fire hazard due to overheating when permissible connection cable lengths are exceeded
Excessively long connection cables between the Braking Module and the external braking
resistor may cause components to overheat with the associated risk of fire and smoke.
• The length of the connection cables between the Braking Module and the external
Fire hazard due to heat dissipation from a braking resistor
An incorrectly installed braking resistor can cause overheating of components with resulting
fire and smoke.
• Only mount braking resistors on the floor.
• Mount the braking resistors so that they are in the vertical position and freestanding.
• Maintain sufficient clearance to objects that can burn.
• Do not place any objects on or above the braking resistor.
AC Drive
Manual, (GH6), 04/2014, 6SL3097-4AL00-0BP4
WARNING
– Use cables with double insulation.
– Observe adequate clearances, e.g. through the use of spacers.
– Route the cables in separate cable ducts or pipes.
CAUTION
dangerous locations, attach an appropriate warning note that is clearly visible and easy
to understand.
WARNING
braking resistor must not exceed 100 m.
WARNING
Sufficient space must be available for dissipating the energy converted by the braking
resistor.
DC link components
5.2 Chassis
205