SPECIFICATIONS
Part No: IC3600AFRB1B1B
Manufacturer: General Electric
Function: CPU Circuit Board
Series: Mark I and II
Repair: 3-7 Day
Availability: In Stock
Country of Manufacturer: United States (USA)
Functional Description
IC3600AFRB1B1B is a CPU Circuit Board developed by GE. It is a part of Mark I and II control system. Responsible for executing logical operations, processing inputs from field devices, and initiating corresponding control actions. It supports turbine control operations such as startup sequencing, protection functions, and interface communication with auxiliary boards.
Features and Components
- Four Relays: Electromechanical components used to control high-power devices or to isolate and route signals. Their inclusion suggests the board interfaces directly with physical field devices or performs protective switching functions.
- Quad Comparator Circuits – LM339N: The LM339N ICs are low-power quad voltage comparators, offering Low input bias current, which minimizes current draw from signal sources. Low output saturation voltage, enhancing performance in low-voltage operations. These comparators compare voltage levels and are typically used in threshold detection, monitoring, and control logic applications.
- Eight Jumper Switches: Jumper switches allow for custom hardware configuration or to enable/disable specific features or paths within the circuit, offering flexibility during setup or maintenance.
- Male Mating Connector (218A4637-P2): A right-angled connector that provides secure mechanical and electrical connection between the CPU board and other parts of the system or backplane. It ensures consistent data and signal flow between components.
- FIELD TAPER AUXILIARY: Involved in auxiliary field control or tapering operations—perhaps modulating field current or interfacing with tapering logic during start-up or shutdown sequences. This could be related to adjusting field excitation levels, an important part of turbine generator control to maintain stable voltage and reactive power output.
Protective System Features
- One of the primary objectives of the protective system is to ensure the safe and immediate shut-off of fuel supply during a fault. To accomplish this, the system includes at least two independent methods of fuel shut-off. This redundancy ensures that if one method fails, the other remains capable of safely stopping the fuel flow. These shut-off valves are hydraulically operated, providing a fast and reliable response, and are controlled by redundant electronic circuitry. Multiple sensors monitor critical parameters and trigger protective actions as needed.
- For added reliability, particularly in heavy-duty turbine units, a hydromechanical trip system is also incorporated. This system operates independently of the electronic control and provides backup protection in the event of an electrical or system failure. The hydromechanical trip mechanism is designed to respond to specific fault conditions, including overspeed, loss of lubricating oil, and manual emergency shutdowns. Its mechanical nature ensures a reliable response even when electronic systems are compromised.
- Sensors used in the protective system are routed through dual independent pathways, feeding data into redundant electronic trip systems. This dual-route setup allows for parallel processing of signals, ensuring continuous monitoring even if one path becomes non-functional. Each electronic trip system is capable of independently initiating shutdown procedures, offering another layer of safety. The outputs from these systems are responsible for triggering hydraulic actuators or other shutdown mechanisms, reinforcing the overall protective architecture.
WOC is happy to assist you with any of your GE requirements. Please contact us by phone or email for pricing and availability on any parts and repairs.
FREQUENTLY ASKED QUESTIONS
What is IC3600AFRB1B1B?
It is a CPU Circuit Board developed by GE.
How does redundancy improve the reliability of the protective system?
Redundancy ensures that there are multiple independent shutdown paths, such as dual electronic trip circuits and a hydromechanical trip system, so the turbine remains protected even if one system fails.
What types of faults can trigger a protective system shutdown?
Common triggers include overspeed, loss of lubricating oil pressure, abnormal vibration levels, sensor failure, and manual trip commands.
