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The GE part number IC3600VANA1 is an Annunciator Card. This is a specialized electronic circuit board used in GE’s legacy Speedtronic Mark I and Mark II series turbine control systems. Its primary function is to manage and display alarm and status information, providing operators with crucial visual and audible notifications about the turbine’s operating conditions.
Function and Key Features
An annunciator card serves as a key part of the human-machine interface (HMI) in older control systems. It provides a centralized and organized way to alert operators to both normal and abnormal events.
- Alarm Display: The card receives a signal when a fault, trip, or alarm condition occurs. It then lights up a corresponding lamp on a panel, often with a specific color (e.g., red for a trip, amber for a warning) and a flashing pattern. This quickly draws the operator’s attention to the specific problem.
- Audible Alarm: In addition to visual signals, the card can activate an audible alarm, like a horn or bell, to ensure the operator is immediately aware of the event, even if they aren’t looking directly at the control panel.
- First-Out Indication: Many annunciator cards have a “first-out” feature. This is a critical diagnostic function that indicates which alarm was the first one to occur in a sequence of events. For example, if a high vibration alarm triggers a turbine trip, the annunciator card can show that the vibration was the root cause, making troubleshooting much easier.
- Test and Reset Functions: The card often includes buttons or logic for testing the alarm lamps and silencing the audible alarm. A reset function allows the operator to acknowledge and clear the alarm once the condition has been resolved.
Applications
The IC3600VANA1 is a legacy component, so it is primarily used in power generation facilities that still operate GE’s older Mark I and Mark II turbine control systems. It is an essential component for:
- Operator Interface: It provides operators with a clear and immediate way to monitor the health and status of the turbine.
- Safety and Diagnostics: It is a critical part of the turbine’s safety system, alerting personnel to potential issues and providing diagnostic information for troubleshooting.
- Industrial Control: While specific to GE, the function of an annunciator card is common across many older industrial control systems where a centralized alarm panel is used.
