Brand GE
Board Type Excitation power distribution module
Model IS200EPDMG1B
The IS200EPDMG1B module is another excitation power distribution module. This is the second version of the IS200EPDM module, which is just one of the power boards in the EX2100 series. Since many other power supply modules will be connected to this board, toggle switches on the board can reduce the power consumption of other power supply boards. When you reduce the power consumption of the other board, the LED aligned with the other board will go off to indicate that the power is off.
The IS200EPDMG1B board provides power for other boards such as the protection, control, and I/O terminal boards. The standard power supply for the EPDM board is 125 VDC or 115 VAC. On the board, there are twelve plug connectors; Two of the connectors are twelve-bit, nine are two-plug, one is three-plug, and all connectors are female connectors.
The IS200EPDMG1B also has nine metal oxide varistors, all of which are concentrated in the bottom quadrant of the board. The output from the EPDM board can be provided to the EGPA, EPSM, and EXTB boards.
The IS200EPDMG1B is an exciter distribution module developed by GE for the EX2100. It is used for EX2100 excitation control, powering the exciter's control, I/O and protection boards. It is located on the side of the exciter source backplane (EPBP) and is powered by one or two 120 V AC inputs in addition to the 125 V DC output of the station battery. The onboard terminal (TB1) is used as the entry point for all power inputs and filters it. In external AC-DC converters, each AC power supply is rectified to 125 V dc (DACA). The two or three DC voltages generated are connected together using external diodes to provide P125V and R125V DC power supplies. These voltages are nominal values of + 62.5V and -62.5V to ground and are centered on ground.
Features of IS200EPDMG1B
Through the four mounting holes on the board, the module is securely grounded and the chassis is grounded. The external DACA#1 and DACA#2 are connected to the AC1 and AC2 of the terminal via two 12-plug connections (JDACA1 and JDACA2), and then the DACA outputs are connected to the 125 V DC lines (P125 and R125).
With the exception of the EXTB board, each individual power output of the exciter board is fused, equipped with an on/off toggle switch, and has a green LED indicator to indicate power availability.
Three exciter grid pulse amplifier boards (EGPA), exciter terminal boards (EXTB), and three exciter Power modules (EPSM) power the three controllers, all capable of receiving power from the output. Each output has its own connector, which is connected to the EPBP for distribution.
Application data
A 24-point terminal, 10 plug connectors, 7 switches, 14 fuses, 4 ground mounting holes, 8 LED indicators and 1 adjustable jumper are all part of the EPDM module. Each connector is rated at 600 V AC or DC.
All switches are rated at 125 V DC, 6 A, but the terminal board is rated at 300 V (10 A per pin). On systems with external reference, adjustable jumper (BJS) isolated ground reference.
