Protection Engineering Basics and Schemes Protection Engineering | Page 92

in next drawing we are going to examine the Main -1 Cap
Protection Binary input module
from left you see different relaying condition , after
which 86(lock out relay) and 94(tripping relay of breaker)
activated. lock out relay will prevent breaker to get on
until lock out relay electrically or by hand reset .
tripping relay is auxiliary relay of breaker which mount
within circuit breaker assembly.
now let see trip/lock out relay circuit.
pg. 92