Calculation Sheets

The Calculation Sheets are intended to provided a general understanding of the engineering formulas related to a particular design task and how they may be applied. The sheets briefly describe the factors participating in a relationship and their relevance to it, for example a quantity would be highly sensitive to a factor with an exponential relationship to it.




Distance Protection

An explanation of the factors influencing the setting of the different zones of a Distance protection relay and the criteria that is widely considered to be good engineering practice for designing these settings.

Line Constants

An explanation of the factors influencing the resistance and reactance values for a single circuit overhead line construction for a particular conductor. It explains the he factors influencing the results, the calculations used how they are applied to determine the line constants of simple single circuit arrangements.