SPECIFICATIONS
Part No.: IS200EHFCH2ACB
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Temperature Operating: -30 to 65oC
Product Type: Exciter Fan Control Board
Availability: In Stock
Series: EX2100
Functional Description
IS200EHFCH2ACB is an Exciter Fan Control Board developed by GE. It is a part of the EX2100 control system. The Fan Control board is an optional component designed to enhance the functionality of the Gate Pulse Amplifier (EHPA) board utilized in EX2100 100 mm Thyristor Control applications. This board serves a critical role in regulating the operation of cooling fans associated with power converters in the system.
Features
- The board is designed to be mounted directly onto the Gate Pulse Amplifier (EHPA) board. It complements the functionality of the EHPA board by providing control and monitoring capabilities specifically related to cooling fans.
- The board is typically utilized in EX2100 100 mm Thyristor Control applications. In such applications, a board is positioned near the top front of each power converter, with the board serving as an optional extension to this setup.
- Depending on the specific requirements of the application, there may be two, three, or four power converters present. Each power converter includes one or two cooling fans on the top of the unit.
- The board is responsible for regulating the operation of the cooling fans associated with the power converters. It ensures optimal cooling performance, thereby contributing to the overall reliability and efficiency of the system.
- The board responds accordingly when a cooling fan malfunctions or fails. While the failure of a single fan may cause the corresponding power converter section to be offline, it does not result in a complete outage of the generator. This design feature helps mitigate the impact of fan failures on system operation and ensures continued functionality.
Product Attributes
- Lead/Lag Fan Control: The EHFC manages two fans per power converter section, operating them in a lead/lag configuration. The lead fan provides active cooling under normal conditions, while the lag fan remains on standby. If the lead fan fails, the lag fan is automatically activated to maintain continuous cooling.
- Automatic Fan Operations: The system ensures seamless fan operation through automated processes. Upon startup, the lead fan begins operating automatically. The lag fan undergoes an automatic test each time the system is powered on to verify its functionality. If the lead fan fails, the control board immediately switches operation to the lag fan, preventing overheating and ensuring uninterrupted performance.
- Scheduled Maintenance: The board includes features for proactive maintenance. It conducts periodic testing of the lag fan on a weekly or daily basis while the EX2100 system remains in operation. Manual swapping of the lead and lag fans is also possible using a local pushbutton or a remote control source such as VersaMax™ I/O.
- Fault Detection and Reporting: The system is equipped with advanced fault detection capabilities. It can automatically identify and report fan failures to the control system for prompt intervention. If both fans fail, an automatic shutdown mechanism is triggered to protect the power converter from potential damage.
- Temperature-Based Control: Cooling operations are managed based on temperature conditions. When the power converter temperature drops below a specified threshold after system shutdown, the fans can be stopped to conserve energy. Additionally, the control board ensures that fans start in a sequenced manner to prevent simultaneous activation, reducing peak current demands on the power source.
- Redundancy and Testing: To enhance system reliability, each power converter section is equipped with independent EHFC controllers, ensuring redundancy and exciter availability. Manual fan testing can be performed while the system is inactive, either using a local pushbutton or remote control sources, allowing for comprehensive system diagnostics.
Board Replacement Procedures
- Deenergize the Excitation System or Power Converter Section: Before initiating any board replacement, ensure that both the main bridge power and control power to the EHPA/EHFC assembly have been deenergized. If the replacement involves fans, manually switch off the fan motor starters located behind the hinged panel at the bottom of the power converter door.
- Electrical Circuit Testing and Safety Measures: Open the Power Conversion cabinet door with caution, and perform thorough testing on any electrical circuits before physically touching them. This step is essential to confirm that the power is completely off, ensuring the safety of the personnel involved in the replacement process.
- Verification of LED Status: Confirm that all LEDs on both the EHPA and EHFC boards are turned off. This verification ensures that the boards are not receiving power and are in a safe state for replacement.
- Removal of Airflow Baffle and Shield: Proceed to remove the LEXAN airflow baffle and shield covering the EHPA and EHFC assembly. Exercise care during this step to avoid any damage to the components.
- Cable Disconnection: Carefully disconnect all cables attached to the board. Exercise precision to avoid any damage to the connectors and cables during this process.
- EHFC Board Removal: Remove the three mounting screws securing the EHFC board in place. Exercise caution to prevent any accidental damage to the board or surrounding components.
- Unseating the Board: Gently unseat the board from the two connectors that mate it to the EHPA board. Ensure a smooth disconnection without applying excessive force.
- Jumper Configuration Check: Before installing the replacement , carefully inspect its jumper configuration. It should generally match the configuration of the original board to maintain compatibility and functionality.
- Replacement Board Installation: Carefully seat the replacement EHFC onto the two EHPA connectors. Ensure that all pins are correctly aligned and fully inserted into the mating connectors to guarantee a secure and reliable connection.
- Reinstallation Steps: Securely re-install the mounting screws to affix in place. Reconnect all cables to their respective connectors on the board. Reattach the LEXAN airflow baffle and shield to provide protection and maintain proper airflow around the assembly.
- Final Checks: Perform a final check to ensure that all components are properly secured and connected. Verify that the LEDs on both the EHPA and EHFC boards are illuminated as expected.
The WOC team is always available to help you with your EX2100 requirements. For more information, please contact WOC.
Frequently Asked Questions
What is IS200EHFCH2ACB?
It is an Exciter Fan Control Board developed by GE under the EX2100 series.
What redundancy options are available for the 100 mm thyristor control applications?
The 100 mm thyristor control system can be configured with either n+1 or n+2 power converter redundancy. This ensures that the system can maintain full output rating even if one or two power converter sections are offline.
How many fans are typically installed per power converter section?
In standard configurations, two fans are installed per power converter section. This setup enhances cooling efficiency and provides redundancy at the fan level.
How does the redundancy at the fan level work?
With two fans per power converter section, the system can continue to operate at full converter rating even if one fan fails. This redundancy ensures uninterrupted cooling performance, as the remaining fan can maintain adequate cooling.
Can failed fans be replaced without affecting the output of the power converter section?
Yes, either fan can fail, and it can be replaced online without impacting the output of the corresponding power converter section. This capability minimizes downtime and ensures continuous operation.
