High-Voltage Circuit Breaker

The bay monitoring system gives a complete insight into the condition of the switchgear apparatuses. Access to monitoring system data allows maintenance regarding the condition instead of periodic maintenance and reduces the costs of switchgear equipment maintenance. The modular structure allows the customer to define the desired system.

Circuit-breaker monitored values

Circuit-breaker monitored values are:

  • Status: circuit breaker close/open, trigger, lockout
  • Phase voltage
  • Main circuit current
  • Close coil and trip coil currents
  • Control circuit voltage
  • Motor current
  • Frequency and duration of motor operation
  • Contact and/or drive travel
  • Switching times (opening, closing, close-open)
  • Hydraulic drive pressure
  • Oil loss in the hydraulic cylinder
  • Spring drive tension

Those quantities give information about the current state of the mechanism and motor of the circuit breaker and its readiness for performing future operations.

Circuit-breaker calculations

Besides values obtained from the sensor directly, there are values that are calculated by mathematical methods. Circuit-breaker calculations give the:

  • Main and control circuits operating times
  • Contact travel and contact velocity during closing and opening operations
  • Arc integral (I2t) during opening operations

These quantities are a good indicator of circuit breaker wear which has to be remedied to prevent catastrophic consequences.

Benefits

The most important benefits of using the circuit breaker monitoring system are:

  • Increased reliability and availability of circuit-breaker through regular insight into the working condition
  • Detecting failures at an early stage before the major failures or disasters occur
  • If a failure occurs, analysis of the causes of failure is easier and more detailed which enables faster elimination of the failure
  • Substantial savings on maintenance because of the possibility of increasing the interval between maintenance and scope of the inspection, only to the worn or defective parts

The main advantage of our circuit breaker monitoring system is its tailor-made structure, which helps us satisfy customers’ unique needs.

 

Circuit breaker monitoring system is a part of the Bay Monitoring System (Končar BMS)