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Figure 14: Typical circuit breaker schematic
Power
CLOSE/OPEN
power
1
Power
input
1
Footnotes:
Use this connection when high-range electronic controller power supply specified and high-range binary input (commands) specified.
1.
Input to close and trip (commands) circuits ≥ 68 Vac or 68 Vdc.
Use this connection when low-range electronic controller power supply specified and low-range binary input (commands) specified. Input
2.
to close and trip (commands) circuits ≥ 17 Vac or 17 Vdc.
Separate close/trip input power required when high-range electronic controller power supply specified and low-range binary input
3.
(commands) -ST9-1/-ST9-2 and -ST9-4/-ST9-5. Low-range binary input (commands) requires ≥ 17 Vac or 17 Vdc.
Schematics are shown with circuit breaker open.
4.
24
4
Legend:
01/C
Control switch close (remote)
01/T
Control switch trip (remote)
08
Power disconnect
08C/T
Close/open power disconnect (optional)
52a
Auxiliary switch, open when circuit
breaker is open
52b
Auxiliary switch, closed when circuit
breaker is open.
52a and 52b spare contacts (standard)
Footnote 3
Footnotes 1 and 2
CLOSE
Power
Filter
command
supplyt
Footnotes 1 and 2
Footnote 3
G
Green indicating light (remote)
R
Red indicating light (remote)
S7
Emergency trip status
W
White indicating light (remote)
XO
Plug connector (operator connections)
-K1
Power supply
-T1
Filter
Emergency trip status
Electronic
controller
OPEN
command
Contacts shown
with emergency
trip handle in
NORMAL position
Status
Ready for CLOSE/
OPEN (N.O.)
Ready for OPEN
(N.O.)
Not ready (alarm)
(N.C.)
Circuit breaker
CLOSED (N.O.)
Circuit breaker
OPEN (N.O.)
Common
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