GE Industrial Solutions Entellisys Device Replacement Guide - Manual (Page 15)

Removing the Messenger from the switchgear compartment 15
2
2 Replacing an EntelliGuard™ Messenger
WARNING! Disconnecting an EntelliGuard Messenger removes overcurrent protection and
centralized control from its associated circuit breaker frame. Other EntelliGuard Messenger and
circuit breaker frames will continue to function normally as long as control power is maintained.
2.1 Removing the Messenger from the switchgear
compartment
1. Place the equipment into Reduced Let-Thru Mode by logging into the HMI under an account
with Administrative privilege.
2. On the Main Menu, click the Reduced Let-Thru Mode button.
3. Click the Enable button on the Reduced Let-Thru Mode screen, and then click OK.
4. Ensure the PPE (Personal Protective Equipment) is appropriate for opening and removing a
circuit breaker from the gear.
5. Open the circuit breaker (immediately under the Messenger) that you intend to replace.
Check that the circuit breaker flag, Messenger faceplate, and HMI indicate that the circuit
breaker is open.
6. Rack the circuit breaker out to the “Disconnect” position.
NOTE: Closing springs will discharge during the rack out procedure if the circuit breaker is
charged; however, the circuit breaker will remain in the open position.
WARNING! Verify the circuit breaker position indicator and HMI indicate that the circuit
breaker is in the “disconnect” position.
7. Open the compartment door.
8. In compartments for electrically operated circuit breakers, remove the charge motor, close
coil, and shunt trip fuses at the upper left side of the compartment
9. In compartments for circuit breakers with a network interlock accessory, remove the set and
reset fuses at the upper right side of the compartment
10. Under the Messenger and to the right, locate one blue 30-pin plug and one configuration
plug. At the left of the Messenger, locate one blue 12-pin plug and two Ethernet cables (A and
B).