GE Industrial Solutions Entellisys Installation - Manual (Page 77)

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Entellisys Low Voltage Switchgear
Appendix D. Circuit Breaker Accessory Devices
Figure D-3. Open-Fuse Lockout (OFLO) connections to the Secondary Disconnect
for EGS-20,-32,-40, and -50 breakers.
Bell Alarm with Lockout
The Bell Alarm with Lockout prevents closing of the breaker
after a protection trip until the Bell Alarm with Lockout is
reset. It contains a set of switch contacts to remotely indicate
that the circuit breaker has tripped because of a protection
trip. Catalog numbers for the Bell Alarm with Lockout
module and kit are given in Table D-3. For installation
instructions and trouble-shooting, see DEH-238 or DEH-239.
Breaker Rating Kit Catalog
Number
Module Catalog
Number
800A – 2,000A EGBLALMSFKIT
3,200A – 5,000A EGBLALMLFKIT
EGBLALMRPLC
Table D-3. Catalog numbers for the Bell Alarm with Lockout module and kit.
The accessory is activated and its status circuit changes state
whenever the breaker is tripped by an overcurrent, ground
fault, or protective relay function via the EntelliGuard
Messenger™. The EntelliGuard Messenger continuously
monitors the state of the status circuit. The connections of
the Bell Alarm with Lockout to the secondary disconnect are
illustrated in Figure D-4. A trip caused by the manual OPEN
button or by the Shunt Trip does not activate the Bell Alarm
with Lockout.
The Bell Alarm with Lockout must be reset by manually
depressing the target on the breaker escutcheon. This will
return the Bell Alarm with Lockout status contact to its
normal configuration and allow the breaker to be closed.
Figure D-4. Bell Alarm with Lockout connections to the Secondary Disconnect.
The contact is shown in the reset state.
Network Interlock
The Network Interlock provides a means of locking out a
breaker to coordinate its operation with other breakers in the
distribution network. When activated by the EntelliGuard
Messenger™, the Network Interlock prevents the breaker
from closing. When the EntelliGuard Messenger issues a
reset signal, the breaker is able to close either remotely or
locally. The Network Interlock contains a set of switch
contacts to remotely indicate the state of the lockout and,
thus, whether or not the breaker can be closed. Catalog
numbers and the operating voltage for the Network Interlock
are listed in Table D-4. For installation instructions and
trouble-shooting, see DEH-41119
Breaker Rating Kit Catalog
Number
Module Catalog
Number
800A – 2,000A EGNTWKSFKIT EGNTWKSFRPLC
3,200A – 5,000A EGNTWKLFKIT EGNTWKLFRPLC
Table D-4. Catalog numbers and control voltage for the Network Interlock
accessory.
The Network Interlock consists of a trip circuit, a reset
circuit, and a status circuit. The device connections to the
secondary disconnect are shown in Figure D-5. Note that a
Bell Alarm with Lockout and a Network Interlock cannot be
installed concurrently in a breaker.
Figure D-5. Network Interlock connections to the Secondary Disconnect
22
2
1
OFLO
Phase A
23
24
4
3
OFLO
Phase B
25
26
6
5
OFLO
Phase C
27
14
2
1
Lockout
Trip Coil
6
16
4
3
Status
Contact
19
15
NI Set
Coil
20
21
NI Reset
Coil
1
3
2
16
19
4
5
NI Status
Contact