GE manufactured the DS3800NEPA1E1D to function as a motor exciter power supply in the Mark IV line. The Mark IV was created to manage gas and steam turbine systems. It can sequence turbine systems and their auxiliaries for automatic startup, cool down and shut down procedures, and can also protect the system from operating under unsafe conditions.
The DS3800NEPA1E1D is factory-drilled in all four corners (twice) and has four drill holes toward the center of the board for the mounting of modules. It is marked for alignment along the top edge (A-L,) and has three male straight-pin connectors. These are 6- 7- and 8- pin connectors and are set up in 2-2-2, 2-1-1-3, and 4-2-2 configurations. It has one multi-pin terminal connector in its upper left corner.
The DS3800NEPA1E1D has one jumper switch with two settings of "rev" or "nr." It has four integrated circuits, four potentiometers, and multiple capacitors and resistors. These include two 10w 71Ω 5% resistors (black) and nine large banded metal film resistors, as well as nine large capacitors. It has one thermal resistor (thermistor) which helps protect circuits and regulate voltage by losing resistance as it gains heat.
There is vertical height to the DS3800NEPA1E1D due to two modules (Raycom Electronics 44B379508-G02) located near the center of the board.
Installation guidelines for the DS3800NEPA1E1D may be found within original tech support publications such as data sheets and manuals. These were provided originally to the end user by General Electric. Please follow all safety procedures when working on this or any other Mark IV components.