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IS200EDEXG1B

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General Electric IS200EDEXG1B Exciter De-Excitation Board fires the EX2100 field-discharge SCR and returns independent conduction feedback during shutdown or trip events.
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Technical specifications for IS200EDEXG1B

  • Manufacturer:
    General Electric
  • Part Number:
    IS200EDEXG1B
  • Product Family:
    GE Excitation Control
  • Product Type:
    Exciter De-Excitation Board
  • Stock:
    1
  • System application:
    GE EX2100 excitation control
  • Module functions:
    De-excitation and optional crowbar
  • Firing control:
    Two independent circuits
  • Control input:
    P24 V firing command
  • Conduction sensing:
    Two Hall effect sensor circuits
  • Backup trigger:
    SCR anode-to-cathode breakover
  • Power-loss function:
    Voltage retention for firing operation
  • Large-system arrangement:
    Master board with slave de-excitation modules
  • 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 Firing Logic Current Feedback Breakover Backup Parallel Modules

Features:

  • Provides two independent SCR firing-control paths.
  • Detects field-discharge conduction through separate Hall effect sensor circuits.
  • Retains firing capability during a control-power interruption.
The field-discharge SCR conducts after field polarity reverses, allowing stored energy to move through the discharge resistor or inductor.

EXHS transfers the de-excitation request after the 41 contactor or breaker opens.

A crowbar arrangement uses the same board architecture to limit negative field voltage during a pole-slip event.

Apter Power can support quotation and documentation requests for the General Electric IS200EDEXG1B Exciter De-Excitation Board used in GE EX2100 field-discharge circuits.
General Electric IS200EDEXG1B Exciter De-Excitation Board Manuals, Datasheets, Links Important 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 IS200EDEXG1B starts field discharge

  • Parallel inputs: Either normal control input can request SCR firing.
  • Command level: A P24 V signal is delivered to both firing-control circuits.
  • Gate action: Both circuits issue pulses to the de-excitation SCR gate.
  • Conduction condition: Current begins after the field voltage has reversed polarity.

Reading IS200EDEXG1B conduction feedback

  • Sensor method: Hall effect elements detect the magnetic field around the discharge-current path.
  • Circuit separation: Two sensor circuits provide independent feedback channels.
  • Core position: Each sensor operates in the air gap of its circular steel core.
  • Successful action: Feedback from either channel confirms that field discharge has occurred.

Independent backup action in IS200EDEXG1B

  • Voltage response: The backup path watches SCR anode-to-cathode voltage.
  • Selected limit: Firing begins after voltage crosses the configured breakover level.
  • Failure coverage: This path remains available if both commanded firing circuits fail.
  • Power retention: Stored control energy supports the protection sequence during supply loss.

Master and slave use of IS200EDEXG1B

  • Large exciters: Several de-excitation modules can operate as one coordinated group.
  • Master role: One EDEX board receives the external firing-control request.
  • Slave command: The master relays that request to the remaining modules.
  • Simultaneous action: All connected discharge SCRs are fired together.
Description
The General Electric IS200EDEXG1B Exciter De-Excitation Board controls the discharge SCR in an EX2100 de-excitation module and can also operate in a crowbar module. It provides the firing and feedback functions needed to remove stored generator-field energy.

Two Hall effect conduction sensors on IS200EDEXG1B use separate circuits and detect the magnetic field produced by discharge current. Their feedback confirms that the SCR path has conducted after a firing request.

Normal operation gives IS200EDEXG1B two independently powered firing-control paths. An anode-triggered circuit adds a third route when SCR anode-to-cathode voltage rises beyond the selected breakover level.

Large excitation systems can combine several modules with one IS200EDEXG1B acting as master and other EDEX boards acting as slaves. The master relays a single command so the connected discharge modules fire together.
Alternative Names
GE IS200EDEXG1B IS 200 EDEX G1B IS200-EDEX-G1B General Electric IS200EDEXG1B IS200 EDEXG1B IS200EDEX G1B GE EX2100 IS200EDEXG1B I5200EDEXG1B
Technical notes
The de-excitation SCR conducts only after field polarity reverses; IS200EDEXG1B therefore uses command firing plus an anode-breakover backup path.
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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.
Why can IS200EDEXG1B receive a firing command without SCR current?
IS200EDEXG1B requires reversed field polarity before the discharge SCR can conduct current.
How does IS200EDEXG1B confirm field-discharge current?
IS200EDEXG1B uses two Hall effect sensor circuits to return conduction feedback.
What protects IS200EDEXG1B if both normal firing paths fail?
IS200EDEXG1B can trigger from SCR anode voltage after the selected breakover level is exceeded.
Why are the two IS200EDEXG1B firing paths kept independent?
IS200EDEXG1B gives each path a separate supply and conduction sensor to avoid one shared failure.
How is IS200EDEXG1B used with several discharge modules?
IS200EDEXG1B can act as master and relay one firing command to the slave modules.
What should be traced if IS200EDEXG1B does not fire after 41 opens?
Trace the EXHS auxiliary-contact path that delivers the de-excitation request to IS200EDEXG1B.
Can IS200EDEXG1B operate in a crowbar module?
Yes. IS200EDEXG1B supports both de-excitation and crowbar module duties in documented EX2100 arrangements.