GE Industrial Solutions EntelliGuard Messenger iButton Replacement Guide User Manual
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Entellisys™ Low Voltage Switchgear
EntelliGuard™ Messenger iButton
Replacement Guide
WARNING! Disconnecting an EntelliGuard Messenger removes overcurrent protection and
centralized control from its associated circuit breaker. Other EntelliGuard Messengers and circuit
breakers will continue to function normally as long as control power is maintained.
NOTE: A pre-programmed iButton is required for this operation.
Step 1:
Remove the 30-pin plug
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 Reduced Let-Thru Mode. On the Reduced Let-Thru Mode dialog box,
select enabled, and then click OK.
3. Ensure the Personal Protective Equipment (PPE) is appropriate for opening and removing a circuit
breaker from the gear.
4. Open the circuit breaker (located immediately under the Messenger) that you intend to replace.
Check that the circuit breaker flag, the Messenger faceplate, and the HMI indicate the circuit
breaker is open.
5. 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.
6. Open the compartment door.
7. 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.
8. In compartments for circuit breakers with a network interlock accessory, remove the set and reset
fuses at the upper right side of the compartment.
9. Under the Messenger and to the right, locate one blue 30-pin plug and one configuration plug (see