GE IS200ERDDH1A IS200ERDDH1ABA

Safe Field Energy Dissipation for GE EX2100 Systems

The GE IS200ERDDH1A IS200ERDDH1ABA provides a controlled discharge path for exciter field energy. This dynamic discharge board belongs to the Mark VI series from General Electric. It activates automatically during regulator shutdown or trip conditions. Therefore, it prevents dangerous overvoltages and protects field winding insulation.

Physical Dimensions and Rack Mounting Details

This discharge board measures 16 cm in width, 12 cm in height, and 3 cm in depth. The GE IS200ERDDH1A IS200ERDDH1ABA weighs approximately 0.30 kg, which supports easy rack installation. Its compact design fits into any standard Mark VI exciter slot. Consequently, you can install it without modifying existing hardware.

Connector Layout and Component Configuration

The GE IS200ERDDH1A IS200ERDDH1ABA features one 34-pin backplane connector for control signals. It also provides one 6-pin power header for field circuit connection. This board contains two high-power discharge resistors and one switching thyristor. Additionally, it includes four energy storage capacitors for gate drive supply.

Technical Parameter	Specification
Full Model Name	GE IS200ERDDH1A IS200ERDDH1ABA
Manufacturer	General Electric (GE)
Series	Mark VI / EX2100
Product Category	Exciter Regulator Dynamic Discharge Board
Weight	0.30 kg (0.66 lbs)
Dimensions (W x H x D)	160 mm x 120 mm x 30 mm
Backplane Connector	1 x 34-pin header
Power Header	1 x 6-pin
Discharge Resistors	2 units (10 Ω, 300 W each)
Switching Thyristor	1 unit (1,600 V, 100 A)
Energy Storage Capacitors	4 units (100 µF each)
Total Capacitance	400 µF
Discharge Time Constant	0.5 seconds typical
Maximum Field Voltage	600 VDC
Operating Temperature	–20°C to +65°C

Energy Storage and Discharge Performance

The GE IS200ERDDH1A IS200ERDDH1ABA stores energy for reliable thyristor triggering. Its four capacitors provide 400 µF of total capacitance. This storage ensures gate drive availability during power loss. Furthermore, the discharge resistors absorb field energy without generating harmful voltage spikes.

Role Within the EX2100 Excitation System

You will typically find the GE IS200ERDDH1A IS200ERDDH1ABA in a dedicated slot near the regulator board. It connects directly across the exciter field winding terminals. Moreover, this board activates automatically upon regulator trip or de-excitation command. Its passive discharge path provides a fail-safe backup to the main de-excitation contactor.

Installation and Wiring Guidelines

Use the GE IS200ERDDH1A IS200ERDDH1ABA as a direct replacement for older ERDD revisions. Always verify that the field circuit is de-energized before installation. This discharge board requires no external power supply for the passive discharge path. The control circuit draws power from the backplane connector. Simply secure the board with its ejector tabs and connect the field wires to the 6-pin power header.