Description

GE IS200EDEXG1BBB Exciter De-Excitation Control Board

Configured for excitation field discharge control in GE Mark VI/Mark VIe Speedtronic systems, the GE IS200EDEXG1BBB (IS200EDEXG1B Exciter De-Excitation Control Board) provides direct electrical execution of excitation energy diversion through SCR-based discharge circuits. The board manages fault-triggered de-excitation paths, monitoring discharge channels, gate drive signals, and protection circuits within EX2100 exciter cabinet architectures.

Hardware Specifications

Parameter	Specification
Model	IS200EDEXG1BBB
Brand	GE
Origin	United States
Weight	0.72 kg
Operating Temp	-30 to +65 deg C
Product Type	Exciter De-Excitation Control Board
System Compatibility	Mark VI / Mark VIe Speedtronic, EX2100 excitation systems
Form Factor	Single-slot 6U CompactPCI
Logic Input Voltage	24 VDC +/-10%
Exciter Power Input	125 VDC EDIS supply +/-10%
Backplane Voltage	+5 VDC, +15 VDC, -15 VDC, +24 VDC
Isolation Rating	2500 VAC between control and discharge circuits
Communication Interface	Fiber-optic high-speed serial interface and 9-pin D-sub
De-Excitation Channels	6 independent channels, arranged as 3 phase pairs
Switching Frequency	1.5 to 8 kHz software configurable
Maximum Discharge Current	100 A peak per channel
Discharge Energy Capacity	500 Joules per channel
Fault Response Time	< 1 ms
Status Indicators	Run, Fault, Watchdog LEDs and channel discharge LEDs

SCR-Based Excitation Energy Discharge Control

The IS200EDEXG1BBB uses SCR-based switching circuits to control excitation energy discharge paths. The hardware incorporates gate driver ICs, protection diodes, current sensing circuits, temperature monitoring components, and discharge resistors. The six-channel structure supports independent discharge control for excitation field circuits, with monitoring feedback for fault detection and system diagnostics.

The board operates with GE Mark VI/Mark VIe deterministic control architectures through fiber-optic serial communication and CompactPCI backplane interfaces. The circuit design includes energy storage components consisting of 6 x 470 uF electrolytic capacitors rated at 450 VDC and 2 x 100 uF tantalum capacitors rated at 25 VDC.

Frequently Asked Questions

Q: What excitation discharge function does the IS200EDEXG1BBB perform?
A: The board controls SCR-based discharge circuits to remove stored excitation energy during fault or shutdown events.

Q: What voltage interfaces are supported by this control board?
A: The board accepts 24 VDC logic input, 125 VDC exciter power input, and operates with +5 VDC, +15 VDC, -15 VDC, and +24 VDC backplane supplies.

Q: How are discharge operations monitored?
A: The board provides current sensing, temperature monitoring, watchdog diagnostics, and individual channel discharge status LEDs.

Field Installation Guidelines

Install the IS200EDEXG1BBB only in the designated GE EX2100 excitation cabinet slot position defined by the Mark VI/Mark VIe hardware configuration.

Verify that excitation power sources are isolated before board replacement or maintenance. Confirm backplane connectors are clean and fully seated to maintain signal integrity.

Route fiber-optic communication cables separately from high-current excitation conductors. Maintain proper cable shielding and grounding practices for control wiring to reduce electrical interference.

Inspect discharge circuit wiring, terminal connections, and grounding paths before energizing the excitation system. Ensure thermal airflow paths around the board assembly remain unobstructed.

Specifications

• Brand: General Electric

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems