Operating mechanism HMC

• Highest switching reliability by using new design principles such as
  • cylinder made from gray cast iron and steel
  • new robust valve technology
  • wiper protected sealing systems
  • gearless pump unit
  • integrated close-interlocking with damage-free design
  • Lowest life-cycle cost due to
    • being maintenance-free for 10,000 CO-operations
      • easily accessible and exchangeable modules
• Shortest time-to-market due to
  • simple and easy adaptation to all circuit-breaker types
  • compatible interface with HMB
  • nearly identical travel curve as HMB, allowing alternative operating mechanisms test according to IEC62271-100

• Suitable for circuit-breaker applications up to 245 kV (HMC-1 and HMC-2) and up to 550 kV (HMC-4)
• Live tank breakers (LTB)
• Gas-insulated switchgear (GIS)
• Dead tank breakers (DTB)
• Hybrid systems
• Operating mechanisms of type HMC can be also used for breakers outside the high-voltage application: Generator circuit-breakers (GCB)

• 3rd generation of well proven operating mechanisms
• State-of-the art technology with new design principles
• Highest power density in the market for compact switchgear design
• Modular design for high accessibility
• Easy and fast adaptation to all circuit-breaker applications
• Maintenance-free for 10,000 CO-operations

O = Opening of the circuit-breaker; C = Closing of the circuit-breaker
Specifications are subject to change without notice