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In busbar protection what is the method of providing an earthed metal barrier surrounding a bus throughout its length called?

  • In busbar protection the method of providing an earthed metal barrier surrounding a bus throughout its length called Fault bus protection.
  • Fault bus protection, also known as busbar protection or bus differential protection, is a technique used to protect busbars from faults. In this method, the busbar is surrounded by a metal barrier which is earthed.
  • The metal barrier forms a Faraday cage around the busbar and provides electromagnetic shielding.
  • The protection relay measures the current at both ends of the busbar and compares them.
  • If there is a fault, the current at the two ends will be different, and the protection relay will operate to trip the circuit breaker and isolate the faulty section of the busbar.