DC link components
8.4 Braking units for 100 kW Basic Line Modules
Booksize Power Units
Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8
517
Braking units for 100 kW Basic Line Modules
8.4.1
Since Basic Line Modules 100 kW cannot feed power back into the supply system, an
external braking unit together with a braking resistor is required for the following tasks:
● When the power fails, the drives are stopped in a controlled fashion (e.g. EMERGENCY
OFF Category 1).
● The DC link voltage is limited during brief generator operation.
The MASTERDRIVES braking unit includes the necessary power electronics and control.
When the braking unit is in operation, the power which is fed back into the DC link is
dissipated via an external braking resistor.
For the operation of a Basic Line Module 100 kW, only MASTERDRIVES braking units with
the following rated braking powers are permitted:
● 4 x P
N
= 100 kW (Article number 6SE7031-6EB87-2DA1)
● 4 x P
N
= 170 kW (Article number 6SE7032-7EB87-2DA1)
For detailed information about the MASTERDRIVES braking unit, see operating instructions
"MASTERDRIVES braking unit" with article number 6SE7087-6CX87-2DA0.
Safety instructions for Braking Modules for the 100 kW Basic Line Module
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 27) 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.
Fire hazard due to overheating because of inadequate ventilation clearances
Inadequate ventilation clearances can cause overheating with a risk for personnel due to
smoke and fire. This can also result in increased failure rates and a shorter service life of
the components.
• Maintain the 80 mm clearances above and below the components.
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