Safety Instructions For Braking Resistors - Siemens SINAMICS S120 System Manual

Braking resistors

7.2 Safety instructions for braking resistors

Connection cables
A shielded connection cable (3 m, 3 x 1.5 mm
1AA00-0DA0.
All other braking resistors are supplied without a connection cable. The maximum conductor
cross-sections are listed in the technical data.
The maximum cable length for all braking resistors is 10 m.
7.2 Safety instructions for braking resistors
Danger to life if the fundamental safety instructions and remaining risks are not carefully
observed
If the fundamental safety instructions and remaining risks in Chapter 1 (Page 17) are not
observed, accidents involving severe injuries or death may occur.
• Adhere to the fundamental safety instructions.
• When assessing the risk, take into account residual risks.
Risk of fire due to ground fault/short-circuit
Inadequate installation of the cables to the braking resistor can result in a ground
fault/short-circuit and place persons at risk as a result of the associated smoke and fire.
• Use the local installation regulations to avoid this fault.
• Protect the cables against mechanical damage.
• Also implement one of the following measures:
Risk of fire through overheating if there are insufficient ventilation clearances
Inadequate ventilation clearances can cause overheating with a risk for personnel due to
smoke and fire.
• Maintain a cooling clearance of 100 mm on all sides of the braking resistor
118
WARNING
WARNING
– Use cables with double insulation.
– Maintain adequate clearance, e.g. by using spacers.
– Lay the cables in separate cable ducts or conduits.
WARNING
) is supplied with braking resistor 6SN1113-
2
System Manual, (SH2), 04/2015, 6SL3097-4AH10-0BP3
High Frequency Drive