SIMOREG CCP limits the current that flows when inverter commutation faults occur to a non-hazardous value so that the thyristors and the associated super-fast fuses are protected. This eliminates the complex and time consuming replacement of fuses after inverter commutation faults.

Although inverter commutation faults cannot be prevented, their effects can be.

• Gear units and the driven machine are protected by shutting off the current in time before it reaches its possible maximum value in the case of a fault therefore protecting them against inadmissibly high torque surges.
• For high rated system currents, up until now, high-speed DC circuit breakers were used up until now to protect the fuses against rupture. By using the CCP, protection is now cost-effectively possible even for lower line currents, whereby SIMOREG CCP has the following advantages when compared to high-speed DC circuit breakers even at high current levels:
  
  • Protection also for circulating currents
  • Lower system costs
  • Lower space requirements
  • No additional air reactor to reduce the current rate-of-rise when a fault occurs
  • Lower operating costs, as it requires no maintenance
  • High degree of availability