SPECIFICATIONS
Part No.: IS200EACFG1ABC
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Temperature: -30 to 65oC
Pin Connectors: J504, J409, and J514
DB9 Connectors: 3
Technology: Surface-mount
Product Type: Exciter AC Feedback Board
Availability: In Stock
Series: EX2100
Functional Description
IS200EACFG1ABC is an Exciter AC Feedback Board developed by GE. It is a part of EX2100 excitation system. The Exciter AC Feedback board (EACF) is designed to measure the exciter PPT AC supply voltage and current. This board is an essential component in the exciter auxiliary cabinet, playing a role in ensuring accurate feedback for the system's operation.
Features and Components
- Voltage and Current Measurement: The board is equipped with transformers that facilitate three-phase voltage measurement. These transformers play a crucial role in accurately measuring voltage within the exciter system. Terminals are provided for connecting two Flux/Air core coils, which are essential for precise measurement of magnetic flux and air gap signals. This capability allows for accurate monitoring and control of electrical parameters critical to the excitation process.
- Output and Connectivity: Voltage and current measurement outputs from the board are distributed via three DB9 connectors. These connectors provide convenient interfaces for cabling to controllers labeled M1, M2, and C, facilitating seamless integration into the control system architecture. The board is designed to support cable lengths of up to 90 meters between the EACF and the EBKP backplane board, offering flexibility in installation and ensuring optimal signal transmission over extended distances.
- Location and Versions: It is strategically installed within the exciter auxiliary cabinet, ensuring it is integrated within the exciter system infrastructure for efficient operation. There are two versions of the board available:
- EACFG1: Supports input voltages up to 480 V rms, catering to lower voltage requirements typical in certain system configurations.
- EACFG2: Supports input voltages up to 1000 V rms, offering compatibility with higher voltage applications and providing flexibility for various system configurations.
- These versions accommodate different voltage requirements, allowing system designers to select the appropriate board version based on specific operational needs and voltage specifications.
- Noise Suppression and Grounding: To ensure signal integrity, the board incorporates effective noise suppression measures near the point of signal entry for Flux/Air core input signals. This includes implementing high-frequency noise suppression components strategically placed to minimize electromagnetic interference (EMI) and maintain robust signal quality throughout the excitation process. Additionally, the board features cable shield terminal screws attached to chassis ground, positioned within close proximity to the input screws where applicable. This grounding arrangement further enhances EMI mitigation, ensuring stable and reliable operation of the exciter system.
Application Data
- The layout of the Exciter AC Feedback board (EACF) is designed to ensure precise measurement and reliable connectivity. Central to its functionality are the four transformers, labeled T1 through T4, which are responsible for measuring the three-phase voltage. These transformers step down the high-voltage AC signals to levels suitable for accurate processing and measurement, ensuring the exciter system receives precise voltage data.
- For voltage inputs, the EACF board is equipped with individual screw connectors. These connectors, TB1, TB2, and TB3, are assigned to the first, second, and third-phase voltage inputs, respectively. This arrangement allows for secure and organized connections, facilitating ease of installation and maintenance. The use of individual screw connectors ensures that each phase's voltage input is securely fastened, reducing the risk of loose connections and potential signal loss.
- The terminal block TB4 on the EACF board is designated for wiring connections from the two Flux/Air core coils. These coils are crucial for measuring magnetic flux and air gap signals, which are integral to providing accurate feedback to the exciter system. The placement and design of TB4 ensure that the wiring from these coils is securely connected, minimizing the risk of interference and signal degradation.
- Additionally, the board includes three 9-pin sub-D connectors, labeled J504, J509, and J514. These connectors are used to establish cable connections to the EBKP backplane. The EBKP backplane interfaces with the EMIO boards, ensuring that the measured voltage and current data is accurately transmitted for processing and control purposes. The sub-D connectors provide a reliable and standardized method for connecting the EACF board to the backplane, facilitating efficient data transfer and system integration.
Board Replacement Procedure
- De-energize the Panel: Ensure that the panel housing the board is completely de-energized. Refer to the appropriate User's Guide, GEH-6631, for comprehensive de-energizing procedures. Follow all local lock-out/tag-out practices to prevent accidental energizing during the replacement process.
- Open the Auxiliary Cabinet Door: Carefully open the door of the auxiliary cabinet where the board is located. Test all electrical circuits before touching them to confirm that the power is off. Use appropriate testing equipment to verify the absence of voltage.
- Disconnect Cables from the EACF Board: Ensure all cables are labeled with the correct connector names as marked on the board. Proper labeling simplifies the reconnection process. For voltage inputs, disconnect the wiring from the screw connectors TB1, TB2, and TB3. For the coil inputs, disconnect the wiring at TB4.
- Remove the Board: Remove the three screws that secure the board to its mounting. Carefully take the board out of its position, ensuring not to damage any components or connectors.
- Install the New Board: Orient the new board in the same position as the one removed. Attach the new board onto the standoffs using the three screws removed in the previous step. Ensure the board is securely mounted.
- Reconnect All Cables and Wires: Reconnect all previously disconnected cables and wires to the new board, ensuring each one is connected to the correct labeled connector. Verify that all cables are properly seated at both ends to prevent any loose connections.
- Close the Auxiliary Cabinet Door: After ensuring all connections are secure, close the auxiliary cabinet door.
The WOC team is always available to help you with your EX2100 requirements. For more information, please contact WOC.
Frequently Asked Questions
What is IS200EACFG1ABC?
It is an Exciter AC Feedback Board developed by GE under the EX2100 series.
How should I label the cables before disconnecting them?
Verify that all cables are labeled with the correct connector names as marked on the board. Proper labeling will simplify the reconnection process.
Which connectors should I disconnect for the voltage inputs?
For voltage inputs, disconnect the wiring from the screw connectors TB1, TB2, and TB3.
What should I do with the coil inputs?
For the coil inputs, disconnect the wiring at TB4.
How is the EACF board secured to its mounting?
The board is secured to its mounting with three screws. Remove these screws to detach the board.
