DS3800NEPA1D1A

About the DS3800NEPA1D1A

The DS3800NEPA1D1A motor exciter powerboard from General Electric is a component of the Mark IV Speedtronic line. The Mark IV, which was designed for gas and steam turbine control management, has the capability to sequence turbines and their auxiliaries for a fully automated shutdown, startup, and cool down procedure. The Mark IV control system can also protect the turbine system against operation under unsafe conditions.

The addition of two Raycom Electronics 44B379508-G02 modules makes the DS3800NEPA1D1A a vertically heavy PCB. These two modules are placed parallel to the short end of the board, side by side. In addition, the DS3800NEPA1D1A uses the following components:

• Jumpers. There is one jumper switch, which can be placed at REV or NR.

• Integrated circuits. There are four circuits on the DS3800NEPA1D1A .

• Resistors. There are several small resistors and nine large resistors with orange, white and gold bands.

• Capacitors. There are several small capacitors and nine large orange capacitors

• Connectors. There is one male multi-pin terminal connector in the upper left corner. There are two straight-pin connectors, also male, in the lower left corner.

• Potentiometers.  There are four rotary potentiometers. 

• Thermistors. There is one thermistor, also known as a thermal resistor, on the right side of the board. Since thermistors lose their resistance as they gain heat, these components are helpful for voltage regulation and circuit protection.

The DS3800NEPA1D1A is factory drilled at all corners and four times toward the center of the board. It is marked for alignment along two edges.

Datasheets and manuals originally provided by GE may provide the best guidance for installation. Technical support for this and other Mark IV components was provided by GE.