IS200EBRGH2A - Exciter Bridge Interface Board

Functional Description

IS200EBRGH2A is an Exciter Bridge Interface Board manufactured and designed by General Electric as part of the EX2100e series used in GE Excitation Control Systems. The EBRG board interfaces the EX2100e control system to the SCR (or thyristor bridge) and related bridge I/O, including fan starters, fan status feedback, over-temperature and blown fuse detectors, thermistor temperature sensors, and Rogowski coil bridge line current sensors. Using the HSLA, the EBRG can interface to one or two UCSB controllers, allowing operation in simplex or redundant control architectures. The EBRG board H2 is used on all systems with 77 mm or small thyristors. The EBRG board H1 is used on 100 mm thyristors. The EBRG is compatible with most SCR devices, allowing use over a wide range of SCR ratings and bridge architectures including simplex, warm backup, and parallel bridge converter.
The EBRG board interfaces customer ac and dc control power supplies to the control system hardware. The EBRG board accepts a 125 V dc source from the station battery, and one or two 115 or 220 V ac 50/60 Hz supplies, connected through a pluggable screw terminal board. The ac is rectified and filtered in ac-to-dc (DACA) modules. The resulting 125 V dc is diode-coupled with the other dc sources to create a dc bus that feeds the controllers, I/O boards, and bridge interface boards.

FEATURES:

• Interface and Control Features: Facilitates interfacing of current condition feedback and control of the bridge, allowing for precise regulation of excitation levels. The board serves as a conduit for bridge controls, ensuring seamless communication and coordination within the system.
• Mounting Location: Primarily mounted within the Power Conversion Cabinet, where it interfaces with other essential components such as the PCM, DC circuit contactors, and circuit disconnect or breaker. This strategic positioning ensures optimal functionality and integration within the power conversion system.
• Controller Compatibility: Notably, the board does not interface with Controller C within the series. However, it effectively manages bridge firing and control independently.
• Purpose and Development: Specifically designed by GE to function as an Exciter Bridge Interface Board, tailored for integration within the EX2100e system. It plays a vital role in managing communication and coordination between control systems and power bridges.
• Interface Control: The primary function is to interface control signals with the power bridge components. This ensures smooth operation and coordination between the control system and the power bridge, facilitating efficient power management and distribution.
• Quantity and Compatibility: Each PCM within the system is equipped with one board, ensuring uniform distribution and compatibility across the EX2100e platform. Engineered to seamlessly integrate with the EX2100e system architecture, providing reliable performance and compatibility.
• Power Supply and Source: The board operates with a power supply of 125 VDC, ensuring sufficient power for its functionality. It receives its power from the EDIS, which serves as the primary power source for the EX2100e system.
• Thyristor Systems Compatibility: Designed to interface with various thyristor systems, including those with dimensions of 42mm, 52mm, and 77mm. This broad compatibility ensures versatility and adaptability to different configurations and requirements within the EX2100e system.
• Integration and Control: Through its interface capabilities, the board enables seamless integration and control of the power bridge components within the EX2100e system architecture. It facilitates efficient communication and coordination between control systems and power bridges, optimizing system performance and reliability.