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The GE part number IS200FCGEH1A is a LCI Control & Gating Card for an Excitation Control System. Its primary function is to provide the precise timing and control for the thyristors in a Load Commutated Inverter (LCI), which is a type of static starter for large synchronous machines, such as generators or motors. ⚡
Function and Key Features
An LCI system is used to start large synchronous machines by converting a constant voltage, constant frequency AC source into a variable voltage, variable frequency AC source. The FCGE card is the “brain” that controls this conversion.
- Gating Pulse Generation: The board is responsible for generating the high-energy “gating pulses” that turn on the thyristors (also known as Silicon Controlled Rectifiers or SCRs). By precisely controlling the timing of these pulses, the system can regulate the speed and torque of the machine during startup.
- Control and Regulation: It monitors the machine’s rotor position and the power system’s frequency to ensure that the firing pulses are synchronized correctly. This is critical for a smooth and efficient startup.
- System Integration: The FCGE card works in conjunction with the main control card (like a DSPX) and other I/O boards to form the complete LCI control system. It is a key part of the control chain that directly impacts the startup performance of the machine.
- Robust Design: Like all GE industrial control components, it is built to withstand the harsh conditions of a power plant.
Applications
The IS200FCGEH1A is a specialized component used in power generation and large industrial facilities. It is essential for:
- LCI Starting Systems: It is the core control component for the LCI static starter, which is used to bring large generators or motors up to speed before they are synchronized to the grid.
- Generator Startup: By providing a controlled and reliable startup sequence, it helps to minimize mechanical and electrical stress on the machine, which improves its lifespan and reliability.
