Wire Consultancy Engineering and Safety

Arc Flash Study

An arc flash is a type of electrical explosion or discharge that results from a low-impedance connection through air to ground or another voltage phase in an electrical system.

Arc flash temperatures can reach or exceed 35,000 °F (19,400 °C) at the arc terminals.The massive energy released in the fault rapidly vaporizes the metal conductors involved, blasting molten metal and expanding plasma outward with extraordinary force. A typical arc flash incident can be inconsequential but could conceivably easily produce a more severe explosion. The result of the violent event can cause destruction of equipment involved, fire, and injury not only to an electrical worker but also to bystanders. During the arc flash, electrical energy vaporizes the metal, which changes from solid state to gas vapour, expanding it with explosive force.

Objective

The Arc Flash Analysis used to determine worst case arc flash energy levels. Arc Flash Analysis identifies and analyses high risk arc flash areas in your electrical power system.

Scope

  • Arcing fault level
  • Clearing time
  • Arc flash duration
  • Arc flash boundary
  • Employee online working distance
  • Incident energy during flash
  • Limited approach boundary
  • Restricted approach boundary
  • Prohibited approach boundary