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3 year warranty

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Bridge and protection board number IS200EGPAG1A is a gate plus amplifier and controls the power bridge, the gate amplifier directly controls the SCRs and is the interface for what is known as the conduction feedback along with airflow and temperature monitoring.



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  • Part Number: IS200EGPAG1A
  • Manufacturer: GE Industrial Systems
  • Series: EX2100 Excitation Control

IS200EGPAG1A Technical Specifications

Alarm Level Temperature Switch Trigger 170°F
Board Description Exciter Gate Pulse Amplifier Board
Catalog Number IS200EGPAG1A
Hardware Form G1A
Location Power Conversion Cabinet
Quantity of EGPA per Power Conversion Module (PCM) One
Quantity of Thermal Switches 2
Wiring Board Description Bridge and Protection Board

Product Description

The prime purpose of the Exciter Gate Pulse Amplifier Board labeled IS200EGPAG1A is to control the power bridge. As the board is controlling the power bridge it will also receive gate commands from an ESEL board and will then generate firing pulses for six silicon-controlled rectifiers (SCRs). Along with being an interface for the previously described modes, the IS200EGPAG1A is also an interface for bridge airflow, temperature monitoring, and feedback for conduction currents. The location of this board is not in the auxiliary cabinet but in the power conversion cabinet. 

There are LEDs on the IS200EGPAG1A model which indicate the status of the currents into the bridge, line filters, bridge temperature, output firing, gate power supply, alarm/fault conditions, and the cooling fan rotation. Please note that when the board has been connected to a power conversion module (PCM), one EGPA is used per PCM.

There is an individual manual that contains a more detailed description of the IS200EGPAG1A model. The name of the manual is GEI-100461 IS200EGPA Exciter Gate Pulse Amplifier Board. Attached on the manual tab of this page there is an overarching series manual which is the GEH-6632 EX2100 Excitation Control Guide, information about the IS200EGPA can be found on pages twenty-six, thirty-four, and fifty-one. 

Frequently Asked Questions about IS200EGPAG1A

Where does the power supply for the IS200EGPAG1A model come from?

The power supply for the IS200EGPAG1A is derived from the EPDM module. 

Does the IS200EGPAG1A board control anything mounted in the Power Conversion Cabinet?

Yes. The IS200EGPAG1A model controls six SCRs from the bridge rectifier. 

The IS200EGPAG1A model received a nominal power source of 125 VDC what is it used for?

The power source of the IS200EGPAG1A model is used to provide power for SCR gating over the full range of input supply voltages from an on-board DC/DC converter.

The IS200EGPAG1A has two thermal switches what happens if both thermal switches are opened?

If both thermal switches on the IS200EGPAG1A open, a trip and a fault are generated. One thermal switch opens at the alarm level of one-hundred and seventy degrees Farenheit, while opening at one-hundred and ninety degrees Farenheit for the trip level. 

Reviews For IS200EGPAG1A

Internal Review

The IS200EGPAG1A model is the best model for controlling the bridge functions. The model can be attached to a power conversion module, but if more than one power conversion module is being used more than one EGPA module must be attached, because of the need for more than one EGPA module it is always to have more than one IS200EGPAG1A on hand. - AX Control Tech Team

Repair Services For IS200EGPAG1A

Type Lead Time Price Action
Repair Service 1-2 weeks $1745

Our highly skilled technicians can repair your IS200EGPAG1A. All of our repairs come with a 3 Year AX Control Warranty. Please contact us for additional information about our repair process. To receive the repair pricing and lead time listed above please process your repair order via our website. The following repair options may be available upon request:

  • 48-72hr Rush Repair
  • Detailed Repair Reports
  • AX Control Certificate of Warranty

AX Control Warranty Info

All products we sell are backed by our unparalleled warranty. A warranty certificate will be provided with your order upon request.
All PLCs, HMIs, and Turbine Control Boards: 3 Years
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All Motors: 1 Year
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