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balance point back. These tests indicate quite effects on the 110 kv lines, it was noted that the parclearly that the relay errors on double line-to-ground allel line, which was on the same towers, caused a faults, as expressed in equations 3 and 4, are variable shift in the relay balance point of approximately 1/3. and in general unpredictable, thus justifying the These tests indicate that where parallel lines are on switching arrangement whereby tripping is pre-the same towers, compensation must be made for the vented on double line-to-ground faults. mutual effects, if accurate distance measurement is

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