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Fault Level Calculations  Want us to call you

Objective of Fault Level Calculations:

Fault level at any given point of the electric power supply network is the maximum current that would flow in case of a Short Circuit fault at that point and the process by which it is measured with mathamatical and systematic methdology is know as fault level calculations

Scope of Study

This study will determine:

When performing fault calculations we usually assume that the system voltage at the point of the fault is the same as the nominal system voltage at that point. Another commonly made assumption is that the load current flowing in the system is negligible compared with the size of the fault current.

The process of calculating three-phase fault levels can be described in four main steps:

  • Step 1 - System single line diagram
  • Step 2 - Develop equivalent circuit expressing all parameters in per unit values:
  • Step 3 - Apply circuit reduction techniques
  • Step 4 - Calculate fault level and fault current

Standard And Regulations

The Fault Level Calculation Procedure Followed Is As Given In Is 13234-1992

(Indian Standard Guide for Calculating Short Circuit Currents in AC Electrical Networks up to 220kV)