-ETHOD OF OPERATION
3*
6
# ' #
3*
3*
4RIP CIRCUIT
FAILURE
,
,
")
")
42
#,/3%
42)0
42
4RIP RELAY OF 3*
OR ANY OTHER PROTECTION RELAY
")
"INARY INPUT OF 3*
4#
#IRCUIT BREAKER TRIP COIL
!UX
#" AUXILIARY CONTACTS
5
CV
#ONTROL VOLTAGE
.O
4RIP RELAY
OPEN
OPEN
CLOSED
CLOSED
#" POSITION
#,/3%$
/0%.
#,/3%$
/0%.
")
")
(
,
(
(
,
,
,
(
") ,
") ,
&AILURE
4RIP CIRCUIT
(
(
&IGURE
0RINCIPLE OF TRIP CIRCUIT SUPERVISION WITH TWO BINARY INPUTS
N
N
NUMBER OF REPEATED STATUS CHECKS
#" AUXILIARY CONTACTS ILLUSTRATED
FOR CLOSED BREAKER
5
CV
!UX
!UX
4#
#"
OR ANY OTHER
PROTECTION RELAY
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