Load-shedding controller PML630

A dedicated load-shedding controller that prevents power blackouts and outages in power networks

The PML630 is a versatile and freely configurable device that protects industrial, utility and infrastructure power networks with multiple power sources and critical consumers against disturbance-related blackouts and power outages. During a network disturbance, it ensures the availability of power supply for critical process loads by dropping less critical ones in a fast, accurate and selective way. Consequently, the duration and frequency of industrial production and power outages in the distribution network can be minimized, and damage to electrical and process equipment avoided. 



  • Comprehensive power and under frequency based load-shedding

Product benefits

  • Safeguards and provides value for investments
  • Ensures high availability of customer processes through a high-performance solution, using the full potential of the IEC 61850 communication standard
  • Seamless integration of protection and control, station automation, and power management functionality in medium-voltage switchgear
  • Offers increased flexibility and scalability and improved system integration and customization, fulfilling a variety of requirements
  • All load-shedding modes enabled and available for use with every device
  • Easy system integration using IEC 61850; guaranteed load-shedding command generation time of up to 20 milliseconds from disturbance detection 

Product features

  • Fast load shedding due to loss of single or multiple power sources, disintegration of power network, network or process conditions like rate of change of frequency etc.
  • Slow load-shedding based on overload of power sources or maximum demand violation at the power grid tie-line or generator
  • Manual load shedding initiated by the operator based on power definition or load-feeder priorities
  • Underfrequency load shedding as backup to fast and slow load shedding
  • Two to three PML630 devices work together in a distributed manner to handle bigger power networks and fast load shedding
  • Supports native IEC 61850 communication protocol, including analog and binary GOOSE messaging for reduced wiring and supervised communication

Are you looking for support or purchase information?

Ready to configure your product order code?

Go to ABB Relays-Online
Loading documents

Related offering

Select region / language