IS200EPDMG1ABA - Exciter Power Distribution Module

SPECIFICATIONS

Part No.: IS200EPDMG1ABA
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Technology: Surface-mount
Temperature Operating: -30 to 65oC
Product Type: Exciter Power Distribution Module
Availability: In Stock
Series: EX2100

Functional Description

IS200EPDMG1ABA is an Exciter Power Distribution Module developed by GE. It is a part of EX2100 control system.Exciter Power Distribution Module serves a pivotal function of supplying power to the control, I/O, and protection boards of the exciter. The following breakdown provides a comprehensive understanding of the module's design, power sources, and distribution features.

Power Input and Mounting Configuration

Mounted on the side of the Exciter Power Backplane . It receives its primary power input, a steady 125 V dc, directly from the station battery. For backup scenarios, the module accommodates one or two 120 V ac power inputs. All power inputs, regardless of source, are processed through a board-mounted terminal block (TB1) and undergo thorough filtering to ensure a clean and stable power supply.

Voltage Conversion and Output Configuration

The ac power inputs are externally rectified to 125 V dc using Ac to Dc Converters (DACA). Resulting dc voltages, denoted as P125V and R125V, are diode-coupled through external diodes to create a dual-source power supply. These voltages, with a nominal value of +62.5 V and -62.5 V to ground, are center grounded. The module, crucially chassis grounded, enhances safety through grounding via four dedicated board mounting holes.

Power Source Connectors and External DACA Integration

Two 12-plug connectors, JDACA1 and JDACA2, establish connections between the ac power sources from the terminal block (AC1 and AC2) and external DACA 1 and DACA 2. These connectors seamlessly return the DACA outputs to the 125 V dc lines, known as P125 and R125. This integration ensures a streamlined and efficient power flow within the system.

Individual Power Supply Outputs

The module is designed with a keen focus on precision in power distribution. Each power supply output to the exciter boards is individually fused, accompanied by an on/off toggle switch (except for the EXTB board), and a green LED indicator. These indicators play a crucial role in signaling the availability of power to the respective exciter boards.

Exciter Boards Supported and Distribution Network

The power distribution extends to multiple exciter boards, including up to three Exciter Gate Pulse Amplifier Boards, the Exciter Terminal Board, and three Exciter Power Supply Modules serving three controllers. A dedicated connector for each output is provided, and these connectors are meticulously wired to the EPBP for efficient and organized distribution of power within the excitation control system. The module, through its meticulous design and functionality, plays a central role in ensuring the reliable and continuous operation of the EX2100 Excitation Control system.

Replacement Procedures

• Ensure De-Energization: Prior to replacement, verify that the exciter is de-energized following procedures outlined in the EX2100 Installation and Startup Guide (GEH-6631). Adhere to lock-out/tag-out local practices for safety.
• Cabinet Access and Voltage Testing: Open the control cabinet door and use equipment designed for high voltages to test electrical circuits before any physical contact. Confirm power-off status for safety.
• Switch Position Recording: Record the position of all switches on the board. Set all switches to the OFF position.
• Cable Disconnection: Carefully disconnect all cables from the module, ensuring each cable is labeled with the correct connector name for simplified reconnection. Avoid dropping any hardware into the equipment to prevent damage or injury during power reapplication.
• TB1 is a pluggable terminal board; refrain from removing individual connections. Ensure the de-energization of the 125 V dc and 120 V ac external power sources before removing the terminal board.
• Terminal Board Removal: Unscrew the captive screws at each end of the terminal board and remove it from the module while keeping individual connections intact.
• Module Removal: Remove the seven mounting nuts securing the EPDM module to the metal standoffs and detach the module.
• New Module Orientation and Installation: Orient the new module in the same position as the original and secure it to the metal standoffs using the seven nuts removed.
• Verification of Switches and Fuses: Ensure all switches on the new module are set to the OFF position. Check and confirm the presence and integrity of all fuses.
• Cable Reconnection: Reconnect all cables that were previously disconnected from the module.
• Terminal Board Reattachment: Orient the terminal board with individual connections intact in the same position as when removed. Press it into the plug on the new module and tighten the mounting screws at each end.
• Switch Restoration: After power is reapplied, set all switches to the positions recorded in step 3 (on the removed board).
• Cabinet Closure: Close the control cabinet door, completing the module replacement procedure.

The WOC team is always available to help you with your EX2100 requirements. For more information, please contact WOC.

Frequently Asked Questions

What is IS200EPDMG1ABA?
It is an Exciter Power Distribution Module developed by GE under the EX2100 series.

What components does the module include?
The module is equipped with a 24-point terminal block, ten plug connectors, seven switches, fourteen fuses, four grounded mounting holes, eight LED indicators, and one adjustable jumper.

What are the specifications of the connectors?
All connectors are rated for both 600 V ac or dc, ensuring versatility and compatibility with diverse electrical requirements.

What is the rating of the terminal board on the module?
The terminal board has a rating of 300 V and supports a current of 10 A per pin, providing a reliable and robust interface for power distribution.

What is the rating of the switches on the module?
The switches are rated for 125 V dc and can handle a current of 6 A, ensuring their suitability for control and operational functions within the system.