Brand GE
Board type exciter source module
Model IS200EPSMG1A
The IS200EPSMG1A is an exciter power module developed by GE under the Mark VI Turbine Control System. This exciter source module (EPSM) is used by both the EX2100 excitation control system and the EX2100 regulator control. The EPSM Group 1 (EPSMG1) module is used for the excitation control system, and the EPSM Group 2 (EPSMG2) module is used for the regulator control. The excitation regulator power sub-board (EPSD) is installed on the EPSMG2. The EPSM consists of two main parts: a step-down regulator and a push-pull inverter. The step-down regulator converts the input voltage to a 50 V DC intermediate voltage. This intermediate voltage is then fed to a push-pull inverter, which generates the necessary multiple output voltages. The transformer of a push-pull inverter provides high voltage isolation between the input voltage source and the output of the control system.
Application of excitation control system
The EPSMG1 converts the 125 V DC voltage from the power distribution module (PDM) to the voltage required for EX2100 excitation control. Each controller M1, M2, and C is powered by three independent EPSMG1s. They installed the exciter Source backplane (EPBP) in the EPBPG of the control cabinet, which is located below the EBKPG A exciter backplane (EBKP). Power is transmitted from EPSMG1 to EPBP via connectors P1 and P2 (cables for connecting EBKP to other boards). The EPSMG1 provides +5 V DC, 15 V DC, and 24 V DC power supplies for the control component backplane. External modules are also powered as follows:
The 24 volt DC provides power to the fan, magnetic disconnection module, pry bar module, ground detector module, and field voltage/current module.
Isolation +70 V DC for terminal board contact moistening
The GE signal regulator board has one terminal with terminals for 72 signal lines. It also includes a 50-pin connector. The terminal ID on the wiring terminal can be OUT2, OUT1, COM1, COM2, P15,sO21, and L23. It also contains terminals for 6 signal lines.
When the GE signal regulator board is installed in the driver, multiple signal wires and ribbon cables may be connected. Some signal lines transmit signals from the circuit board to other electrical plates in the driver for processing. Other signal lines transmit signals to the board for processing. The signal is then sent to other boards for further processing. Since there are many wires, it is important to consider that air must flow freely inside the drive, and the wiring of the cables must ensure that they do not block airflow. When the drive is running, cold air enters the drive from the bottom and flows around, above and below the hot parts. These components include processing boards for sending and receiving signals. It also includes motors and associated moving parts. If the air is trapped in the wiring harness, the inside of the drive may become too hot. This will cause an overheating situation and cause the drive to shut down automatically.
