A METHOD OF INCREASING THE SENSITIVITY OF PROTECTION FROM SINGLE-PHASE SHORT-CIRCUITS TO GROUND IN THE 6 - 10 kV NETWORK

摘要

Amethod of increasing the sensitivity of protection from single-phase short-circuits to ground by acting on the signal with brief dummy grounding of the neutral is described. After determining the damage, the neutral is again grounded through a high resistance and an arc-quenching reactor. An increase in the protection sensitivity is thereby obtained, the damage detection time is shortened, and the probability of the single-phase short-circuit to ground converting into double and multipoint earth faults is reduced.