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        IS200ESELH2A

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        General Electric IS200ESELH2A is an Exciter Selector Board that directs the active EX2100 controller's six gate commands to a three-bridge firing arrangement.
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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 IS200ESELH2A

        • Manufacturer:
          General Electric
        • Part Number:
          IS200ESELH2A
        • Product Family:
          GE Excitation Control
        • Product Type:
          Exciter Selector Board
        • Stock:
          1
        • Control system:
          EX2100 excitation control
        • Board function:
          Active-controller gate-command selection
        • Input command set:
          Six logic-level gate commands
        • Bridge arrangement:
          Three-bridge H2 configuration
        • Upstream interface:
          EMIO board
        • Downstream interface:
          EGPA or EHPA gate pulse amplifiers
        • Controller use:
          Redundant control architecture
        • Installation location:
          EX2100 control rack
        • 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 Command Selection Bridge Interface Redundant Control Installation Checks

        Features:

        • Routes the six-command firing set selected from the active EX2100 controller.
        • Supports the H2 three-bridge selector arrangement.
        • Feeds logic commands onward to the bridge gate-pulse amplifiers.
        Command selection occurs before pulse amplification, allowing controller redundancy logic to determine which signal source reaches the bridges.

        The board sits inside the control rack between the EMIO command path and the EGPA or EHPA interfaces used at the power conversion section.

        Bridge quantity is a hardware architecture choice. The H2 design must remain aligned with the cabinet wiring and the installed number of controlled bridges.

        Apter Power can assist with sourcing and official-document requests for the General Electric IS200ESELH2A Exciter Selector Board used in established EX2100 three-bridge systems.
        General Electric IS200ESELH2A Exciter Selector 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.

        How controller commands reach the selector

        • Command set: Six logic-level gate commands enter from the EMIO path.
        • Source choice: Redundancy logic determines which controller command set is active.
        • Signal role: The board selects and distributes commands without producing power-level gate pulses.
        • Bridge path: Selected outputs continue to the gate-pulse-amplifier stage.

        Connecting the H2 selector to three bridges

        • H2 scope: The hardware arrangement serves a three-bridge excitation installation.
        • Output stage: EGPA or EHPA boards translate selector commands into SCR firing pulses.
        • Channel integrity: Each bridge path must retain its intended cabinet connection.
        • System boundary: Pulse amplification and bridge monitoring remain functions of downstream hardware.

        Maintaining the active-controller firing path

        • M1 and M2: Either regulator controller can provide the firing command source.
        • Active path: Only the command set selected by the control architecture is routed onward.
        • Controller C: The monitoring controller does not perform bridge firing.
        • Replacement check: Preserve controller-channel identity when reconnecting the selector.

        Checks before returning the selector to service

        • Isolation: De-energize the excitation control and gate-command circuits under the site procedure.
        • Board position: Confirm the designated selector slot in the control module.
        • Cable routing: Reconnect every bridge channel to its original amplifier path.
        • Functional proof: Verify source selection and all three downstream command paths before operation.
        Description
        The General Electric IS200ESELH2A Exciter Selector Board routes bridge-firing commands within an EX2100 redundant excitation controller. Its H2 arrangement supplies the gate-command path for a three-bridge installation while preserving controller-source selection.

        Six logic-level firing commands arrive at IS200ESELH2A from the EMIO signal path. The selector stage passes the commands from the controller chosen by the redundancy logic rather than creating the high-energy gate pulses itself.

        Downstream EGPA or EHPA hardware converts the selected signals into isolated firing pulses for the SCR bridges. This separation keeps IS200ESELH2A focused on command selection and distribution inside the control rack.

        Connector position, controller channel, and bridge count must agree with the installed EX2100 cabinet. A replacement IS200ESELH2A should therefore be matched to the three-bridge H2 architecture before insertion.
        Alternative Names
        IS200 ESEL H2A GE IS200ESELH2A IS200-ESEL-H2A IS 200ESELH2A IS200ESEL H2A General Electric IS200ESELH2A IS200E5ELH2A IS200 ESELH2A
        Technical notes
        On IS200ESELH2A, bridge-count selection is fixed by the H2 hardware arrangement; it is not a software-configurable output expansion.
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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 can one bridge lose firing after IS200ESELH2A is replaced?
        IS200ESELH2A uses separate cable paths to the EGPA or EHPA boards, so trace the affected bridge channel first.
        Should IS200ESELH2A be fitted in controller C during a rack repair?
        No. Controller C has no ESEL position; IS200ESELH2A belongs in the M1 or M2 firing-control path.
        How can the wrong ESEL group make IS200ESELH2A unsuitable?
        IS200ESELH2A is the H2 form for three bridge drivers; H1 and H3 serve different bridge arrangements.
        What should be checked when IS200ESELH2A ignores the active controller?
        Check controller C selection and the corresponding EMIO path, because only the active IS200ESELH2A sends commands onward.
        Does IS200ESELH2A create the power-level pulses that fire the SCRs?
        No. IS200ESELH2A routes logic commands; the downstream EGPA or EHPA produces the actual SCR firing pulses.
        Which path should be traced when IS200ESELH2A has no gate output?
        Trace the six logic-level commands from EMIO through IS200ESELH2A to the assigned gate-pulse amplifier cables.
        What confirms IS200ESELH2A is ready after a replacement?
        Confirm IS200ESELH2A follows the selected M1 or M2 source and reaches every intended amplifier and bridge path.

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