GE Industrial Solutions Entellisys 5.0 User Manual - Manual (Page 19)

System components 19
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1.3.5 EntelliGuard Messenger
The EntelliGuard Messenger electronic device provides the interface between the circuit
breakers and the CPUs in the Entellisys system.
The following is a summary of the Messenger’s functionality:
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Digitizes all switchgear signals
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Communicates the raw samples to CPUs via the Messenger network
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Controls the circuit breaker
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Performs independent backup trip capability at all times
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Powered by dual 120v control power sources or self-powered from the current sensors
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Provides LED illumination of circuit breaker status, power status, communication status, and
GE “Locator” information
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Provides seal-able switches to set CT rating, and (long time) multiplier setting
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Provides a test connector for trip curve testing using the Entellisys System Test Kit
1.3.5.1 Messenger User Interface
The Messenger User Interface, as show in Figure 1-7, is described below.
Figure 1-7 Messenger front
LED Indicator Lights
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Locate: LED blinks for 10 or 30 seconds on command from the HMI to help operator
physically locate a circuit breaker in the switchgear lineup.
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Com1, Com2: Illuminates when Ethernet communication is plugged in and ready to
communicate.
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Power: Illuminates when either Control Power A or Control Power B sources are powering the
messenger.
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Circuit Breaker Status Open: Illuminates when the circuit breaker is Open. This sensor is
independent of the circuit breaker Close sensor.
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Circuit Breaker Status Closed: Illuminates when the circuit breaker is Closed. This sensor is
independent of the circuit breaker Open sensor.
Switches
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Rating: Ampere rating of the circuit in use. Maximum value is the CT Rating.
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Setting: Multiplier setting for Long Time Overcurrent Protection, specified as X times the
Rating switch value.
Rating Label
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Frame: Circuit breaker frame size, in Amperes, represents the maximum continuous-current
rating.
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CT: Maximum Ampere rating of the CTs.