Watch our quick tutorial presented by our skilled trainer, Sam Craig, on how to carry out External Loop Impedance (Ze) and Prospective Fault Current (PFC) tests on a three phase distribution board.
Ze is a measurement of the external earth fault impedance of the installation. It is the measured resistance of the supply transformer winding, the supply phase conductor, and the earth return path of the supply.
A PFC test, or Prospective Fault Current test detertmines the current that will flow in the event of a line to earth fault and line to neutral fault.
Every distribution board must be tested to make sure that the fault current does not exceed that specified for the protective devices concerned. At Proactive Technical Training, we are here to ensure your safety when it comes to inspection and testing electrical installations.
For more information on the technical training services we provide, head to our website:
If you are interested in City & Guilds courses, check out the training we provide: