Common earth fault loop impedance paths

Front

Which statement is true about earth fault loop impedance paths?

Back

A fault on a three-phase circuit to earth is three separate single-phase faults to earth.

Front

Fault paths are described from the point of fault to the supply transformer, via the earth path, and back to the fault via the ________ conductor.

Back

line

Front

What is the value of ZE (earth fault loop impedance) shown in the diagram?

Back

200 ohm

Front

Refer to the diagram of 'Earth fault loop impedance paths – TT'. The fault current (Ipf) flows through which path?

Back

Through the exposed-conductive-part, earth conductor, and mass of earth

Front

What does the component labeled 'MET' stand for in the diagram of 'Earth fault loop impedance paths – TT'?

Back

Main Earthing Terminal

Front

The function of the protective device in the circuit is:

Back

to protect the circuit from damage due to overload or short circuit

Front

What is the name of the electrical installation component shown in the image on the left?

Back

Earth Mat

Front

What is the name of the electrical installation component shown in the image on the right?

Back

Earth Rod

Front

What is the value of Ze for the TN-S system?

Back

0.8Ω

Front

In the TN-S Earth fault loop impedance path, where does the fault current (Ipf) flow after a fault occurs?

Back

Exposed-conductive-part