GE IS200EDFFH1A Exciter DC Fanned Feedback Board
Delivery time 3 days
Product origin New/used
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The IS200EDFFH1A is the core DC feedback acquisition terminal board of the GE EX
The IS200EDFFH1A is the core DC feedback acquisition terminal board of the GE EX2100e excitation control system. It is specifically designed for accurately measuring the excitation voltage and current of the SCR power bridge and transmitting the converted signals via fiber optic cable to the Excitation Control Auxiliary Interface (EAUX). It is a key signal acquisition and isolation transmission module for generator excitation closed-loop control.
Core Positioning and Architecture: This board belongs to the EX2100e series high-voltage interface components. It adopts a voltage-to-frequency (V-F) conversion architecture and has built-in independent excitation voltage and current feedback channels. Electrical isolation from the EAUX board is achieved via fiber optic cable, completely isolating the high-voltage side from the control side, ensuring system safety and signal purity.
Key Specifications and Electrical Characteristics: Core Function: Measures the excitation voltage and current of the SCR bridge and converts them into frequency signals for output.
Signal Processing: Integrates two independent V-F conversion circuits, one for excitation voltage feedback and the other for excitation current feedback.
Communication Interface: Fiber optic link (HFBR-1528 series), achieving voltage isolation and high interference immunity transmission between EDFF and EAUX.
Power Supply Requirements: 28 VDC DC power input.
Redundancy Configuration: Supports triple redundancy control (M1, M2, and C groups), adaptable to dual/triple redundant excitation systems.
Physical and Environmental Characteristics: I/O terminal block structure, operating temperature 0℃～40℃, maximum AC input frequency 480 Hz.
Manuals and Documents: Dedicated manual GEI-100770, system manual GEH-6781L.
Core Functions and Advantages:
High-Precision Feedback Acquisition: Directly acquires high-voltage signals at the SCR power bridge side, avoiding long-distance transmission losses and ensuring excitation control accuracy.
Full Electrical Isolation: Fiber optic transmission achieves complete isolation between the high-voltage side and the control side, eliminating common-mode interference and improving system immunity and safety.
Frequency Signal Output: Converts analog signals to frequency signals, ensuring stable transmission, strong anti-interference capabilities, and suitability for long-distance and complex electromagnetic environments.
Triple Redundancy Protection: Supports triple redundant control channels; a single channel failure does not affect the overall excitation control, meeting the high reliability requirements of power plants.
Integrated Design: Integrates acquisition, conversion, and isolation into one unit, simplifying system wiring and reducing maintenance complexity.
Typical Application Scenarios:
Synchronous Generator Excitation Control: As the front-end feedback unit of the EX2100e system, provides real-time and accurate excitation voltage/current signals to the excitation regulator.
Gas/Steam Turbine Power Plants: Adapts to Mark VI/VIe turbine control systems, working in conjunction with the EX2100e excitation system to achieve grid connection, voltage regulation, and reactive power control.
Combined Cycle Generator Sets: Used for excitation feedback acquisition in large gas-steam combined cycle units, ensuring the stability of multi-unit coordinated operation.
Industrial Drive Synchronous Motors: Provides high-precision feedback for the excitation systems of large synchronous motors such as compressors and pump sets.
System Compatibility
Fully compatible with the GE EX2100e excitation control system, and seamlessly integrates with the EAUX auxiliary interface board, EACF AC feedback board, SCR power bridge, etc.
Adaptable to Mark VI and Mark VIe turbine control systems, it can be directly connected to the system I/O rack and participate in the overall unit control and protection logic.
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