IS200EPDMG1B GE EX2100, EXCITER PWR DIST MODULE

Description:

The IS200EPDMG1B is an Exciter Power Distribution Module crafted by GE, tailored for use within the EX2100 Excitation Control system. Its primary function is to deliver power to the exciter's control, input/output, and protection circuit boards. Situated alongside the Exciter Power Backplane (EPBP), the module draws its power from one or two 120 V ac inputs as well as the station battery's 125 V dc output. A board-mounted terminal block (TB1) acts as the central hub for all incoming power supply inputs, filtering them before distribution.

Within an external AC to DC converter, each ac supply undergoes rectification to produce 125 V dc (DACA). The resultant two or three dc voltages are then combined using external diodes to generate the P125V and R125V dc source power supplies. These voltages exhibit a nominal value of +62.5 V and -62.5 V relative to ground, with a center grounding configuration.

**Key Features of IS200EPDMG1B:**

Mounting Security: The module is securely fastened through four mounting holes on the board, ensuring both safety grounding and chassis grounding.
Power Connections: The external DACA#1 and DACA#2 connectors are linked to the terminal block's AC1 and AC2 via two 12-plug connections (JDACA1 and JDACA2). Subsequently, the DACA outputs are connected to the 125 V dc lines (P125 and R125).
Indicators and Controls: Each individual power supply output to an exciter board includes fuse protection, an on/off toggle switch, and a green LED indicator signaling power availability. Notably, this applies to all but the EXTB board.
Power Recipients: Three Exciter Gate Pulse Amplifier Boards (EGPA), an Exciter Terminal Board (EXTB), and three Exciter Power Supply Modules (EPSM) feeding three controllers can all receive power from these outputs. Each output features its own unique connector, which attaches to the EPBP for distribution purposes.
Component Breakdown: The EPDM module comprises a comprehensive array of components, including a 24-point terminal block, ten plug connectors, seven switches, fourteen fuses, four grounded mounting holes, eight LED indicators, and one adjustable jumper. Each connector boasts a robust 600 V ac or dc rating.
Ratings and Isolation: All switches are rated at 125 V dc, 6 A, while the terminal board itself is rated at 300 V (10 A per pin). For systems employing an external reference, the adjustable jumper (BJS) serves to isolate the ground reference.
Handling Precautions: To safeguard against component damage due to static electricity, it is imperative to employ static-sensitive handling techniques when dealing with any board. Additionally, when handling boards or components, a wrist-grounding strap should be used, but only after the boards or components have been removed from potentially live machinery and are situated at a normally grounded workstation.
Replacement Procedures: Prior to initiating the replacement process, verify that the exciter has been de-energized. Ensure the power is off by opening the control cabinet door and utilizing high voltage testing equipment before making contact with any electrical circuits. Carefully note the position of every switch on the board, then turn them all off. Methodically disconnect each cable connector from the board and remove it from the EPDM module. To facilitate reconnection, ensure all wires are clearly identified with the correct connector name as indicated on the board.

Datasheet Link:

IS200EPDMG1B GE EX2100, EXCITER PWR DIST MODULE PDF Datasheet