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What is the purpose of SOTF being used inspite of distance
Protection given?
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Answer Posted / ofa khoirun niam
When an impedance protection scheme uses line-side voltage transformers, SOTF current fault detectors may operate significantly faster than impedance units when a breaker is closed into a fault anywhere on the line. The dynamic characteristics of typical impedance units are such that their speed of operation is impaired if polarizing voltages are not available prior to the fault.
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