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          For IS200EDEXG1A purchasing enquiries, Apter Power offers quotation assistance and access to available original GE product literature.

        IS200EDEXG1A

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        General Electric IS200EDEXG1A Exciter De-Excitation Board fires the field-discharge SCR and monitors conduction in GE EX2100 protection modules.
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Technical specifications for IS200EDEXG1A

        • Manufacturer:
          General Electric
        • Part Number:
          IS200EDEXG1A
        • Product Family:
          GE Excitation Control
        • Product Type:
          Exciter De-Excitation Board
        • Stock:
          1
        • System application:
          GE EX2100 de-excitation and crowbar control
        • Module role:
          Main board in the de-excitation module
        • Power device controlled:
          Field-discharge SCR
        • Firing channels:
          Two independent control circuits
        • Feedback function:
          Dual conduction-sense feedback
        • Backup firing:
          Anode-voltage breakover path
        • Power-loss function:
          Voltage retention for de-excitation
        • Multi-module support:
          Master and slave arrangements for large exciters
        • Tariff Code:
          8537101190
        • Country of origin:
          USA
        • Place of shipment:
          Xiamen,Fujian,China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals SCR Firing Conduction Feedback Power-Failure Retention De-Excitation Sequence

        Features:

        • Provides gate firing for the field-discharge SCR.
        • Uses two independent firing circuits with separate conduction sensors.
        • Retains operating voltage so de-excitation can continue after control-power loss.
        The board is the main control element in an EX2100 de-excitation module and can also serve in a crowbar module.

        EXHS transfers command and auxiliary-contact information into the SCR firing circuits.

        An anode-voltage path provides backup firing when the commanded channels do not operate.

        For de-excitation board sourcing and available manufacturer material, Apter Power assists with the General Electric IS200EDEXG1A Exciter De-Excitation Board for GE EX2100 excitation-control service.
        General Electric IS200EDEXG1A Exciter De-Excitation Board Manuals, Datasheets, LinksImportant Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

        SCR Firing for IS200EDEXG1A

        • Command inputs: Two independent firing-control circuits receive de-excitation commands.
        • Gate action: Either circuit can supply gate pulses to the field-discharge SCR.
        • Conduction condition: The SCR conducts after field polarity reversal makes its anode positive.
        • Independence: Separate control supplies and sensors isolate the two firing channels.

        Conduction Feedback for IS200EDEXG1A

        • Sensors: Two independent conduction sensors monitor discharge current.
        • Purpose: Feedback confirms that the de-excitation SCR established the discharge path.
        • Channel test: Each sensor is checked with its corresponding firing circuit.
        • Status path: The resulting module status is transferred through EXHS to the controller.

        Power-Failure Retention for IS200EDEXG1A

        • Requirement: Field energy still needs a discharge path if normal control power disappears.
        • Retention circuit: The board preserves the voltage needed to complete SCR firing.
        • Backup path: Anode-voltage firing is available if both command circuits fail.
        • Setting check: The selected breakover level must match the installed de-excitation module.

        De-Excitation Sequence for IS200EDEXG1A

        • Trigger: A shutdown or trip initiates de-excitation through the EXHS path.
        • Isolation: The field contactor or breaker opens before the stored energy is discharged.
        • Discharge: The fired SCR routes current through the field discharge resistor or inductor.
        • Multi-module use: Large exciters can coordinate one master board with additional slave modules.
        Description
        The General Electric IS200EDEXG1A Exciter De-Excitation Board is the principal circuit board in an EX2100 de-excitation module and may also occupy a crowbar module. It fires the discharge SCRs and reports conduction while stored field energy is removed.

        Two independent firing circuits on IS200EDEXG1A receive the trip path transferred through EXHS. Each path has its own control supply and conduction sensor, preserving separation between the two firing channels.

        An anode-triggered backup on IS200EDEXG1A responds when SCR anode-to-cathode voltage rises above the selected breakover level. Voltage-retention circuitry keeps the firing logic available during a loss of control power.

        Large exciters can arrange several de-excitation modules as one master with additional slaves. In this structure, each IS200EDEXG1A contributes an independent firing and conduction-feedback path to the coordinated field-energy discharge.
        Alternative Names
        IS200EDEX G1A GE EX2100 IS200EDEXG1A IS 200 EDEX G1A General Electric IS200EDEXG1A IS200EDEX-G1A GE IS200EDEXG1A IS-200-EDEXG1A IS200EDEXG 1A
        Technical notes
        IS200EDEXG1A has two independent firing-control circuits plus an anode-voltage backup path. Test both conduction sensors after any module work.
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        Why might IS200EDEXG1A receive a trip but not fire the SCR?
        Trace the IS200EDEXG1A EXHS input, both firing supplies, gate connections and the selected anode-breakover path.
        How can both IS200EDEXG1A firing channels be tested?
        Test each IS200EDEXG1A control input and its separate conduction sensor without relying on the other channel.
        Why does IS200EDEXG1A retain voltage during power loss?
        IS200EDEXG1A uses voltage retention so de-excitation can continue when normal control power disappears during a trip.
        Which feedback proves IS200EDEXG1A completed de-excitation?
        Both IS200EDEXG1A conduction-sense channels should report SCR current after the field-discharge path is established.
        Can IS200EDEXG1A move between master and slave modules?
        No. The IS200EDEXG1A wiring and configuration must match the assigned master or slave module before operation.
        When should the IS200EDEXG1A anode-firing path be checked?
        Review the IS200EDEXG1A anode path when both commanded firing circuits fail or the selected breakover level is questioned.
        Which records are needed before disconnecting IS200EDEXG1A?
        Keep the IS200EDEXG1A module role, firing inputs, SCR gate leads, breakover selection and sensor channels documented.

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