GE IS200EPDMG1B Exciter Power Distribution Module

GE IS200EPDMG1B Exciter Power Distribution Module

Functional Description

The IS200EPDMG1B Exciter Power Distribution Module (EPDM) is used in the EX2100 Excitation Control to

provide power for the control, I/O, and protection boards. It is mounted on the side of the IS200EPBP Exciter

Power Backplane (EPBP), receives 125 V dc power from the station battery, and accepts one or two 120 V ac

power inputs for backup. All power supply inputs, which are filtered, are received through a board-mounted

terminal block (TB1). Each ac supply is rectified to 125 V dc in an external ac-to-dc converter (DACA or

DACB). The resulting two or three dc voltages are diode-coupled through external diodes to create the dc 

source power supply, designated P125V and R125V. These voltages are centergrounded and are nominally

+62.5 V and –62.5 V to ground. The module is chassisgrounded and safety-grounded through four of the

board mounting holes. 

The IS200EPDMG1B module includes a 24-point terminal block, 12 plug connectors, seven switches, 18 fuses,

four grounded mounting holes, 10 LED indicators, and one adjustable jumper. All connectors are rated 600 V

ac or dc. The terminal board is rated 300 V (10 A per pin); all switches are rated 125 V dc, 6 A. The adjustable 

jumper (BJS) is for isolation of ground reference on systems with external reference.

Technical Specifications