FIELD: electricity.
SUBSTANCE: invention is related to the field of electric engineering and may be used in relay protection power transmission lines designed for implementation of current protection of power transmission lines. In device for longitudinal differential current protection of power transmission lines a microprocessor terminal is placed at one end of the power transmission line and contains two current measuring and transforming elements.
EFFECT: improving reliability and simplifying protection of power transmission lines.
5 cl, 2 dwg
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