CASE STUDIES - PROTECTION OF POWER DISTRIBUTION SYSTEM - II by R. N. Kumar GM , NDPL CASE STUDY 1 Tripping of 33/66 kV Transformers on OLTC OSR Relay Indication ...
... major uses, but it is more common in the earth than zinc, copper, or nickel. ... This metal, however, is more common in the earth than zinc, copper, or nickel. ...
A delay of only fractions of a second in tripping the breaker ... they are providing the only path for fault current between an active conductor and the earth. ...