Digital fault recorders and most modern relays have the ability to capture the apparent impedance to a short circuit. Translating the apparent impedance to a physical location can be tedious and time consuming, especially for a multi-section line.
The Line Database has the ability to locate a short circuit along a transmission line given the impedance measured by a relay or fault recorder. The computed fault location is given as so many miles measured from one end of a corridor, and so many miles from one end of a line section. The following is a sample distance calculator report:
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Distance Calculator Report
Line: Tiger, 13.90kV, 31.00 miles, 20.16 Ohms
From: Berkeley
To: Concord
Impedance = 3.50 Ohm (17.36 % of whole line)
Line distance = 9.48 miles (measured from Berkeley)
in corridor 'OVH1' 9.48 miles from 'WASHLN' on line section 'Quartz'
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