Loop Impedance Calculation Link

For a simple loop with a single conductor, the loop impedance can be calculated using the following equation:

or more practically, ,

where Z_conductor is the impedance of the conductor, Z_transformer is the impedance of the transformer, and Z_other equipment is the impedance of other equipment in the loop. loop impedance calculation

where R_loop is the resistance of the loop and X_loop is the reactance of the loop. For a simple loop with a single conductor,

Once the Zs is calculated, it must be compared against the maximum allowable values for the specific protective device installed. loop impedance calculation