DIFFERENTIAL PILOT-WIRE PROTECTION
The differential pilot-wire protection is based on the principle that under normal conditions, the current entering one end of a line is equal to that leaving the other end. As soon as a fault occurs between the two ends this condition no longer holds and the difference of incoming and outgoing currents is arranged to flow through a relay which operates the circuit breaker to isolate the faulty line. There are several differential protection schemes for the lines. They are:
1. Merz-Price voltage balance system
2. Translay scheme
Written by arjun on March 25th, 2009 with
3 comments.
Read more articles on Feeder protection and Power System and Switchgear&Protection.
j vara prasad
SINDHU
#1. November 20th, 2011, at 7:21 AM.
please send details of power system relays