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IS200EXAMG1A

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General Electric IS200EXAMG1A Exciter Attenuator Module forms the field-side sensing interface for GE EX2100 ground detection.
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Technical specifications for IS200EXAMG1A

  • Manufacturer:
    General Electric
  • Part Number:
    IS200EXAMG1A
  • Product Family:
    GE Excitation Control
  • Product Type:
    Exciter Attenuator Module
  • Stock:
    1
  • System application:
    GE EX2100 field-ground detection
  • Cabinet location:
    Auxiliary cabinet
  • Sensing element:
    Sense resistor in the field resistor network
  • Applied signal:
    Low-frequency square wave
  • Signal level:
    Approximately +/-50 V
  • Redundant sources:
    M1 or M2 ground-detector channel
  • Source selection:
    Relay controlled by controller C
  • EGDM connection:
    Single nine-conductor control and sense cable
  • 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 Signal Attenuation EGDM Interface Field-Side Wiring Protection-Loop Test

Features:

  • Mounts in the auxiliary cabinet as the field-side ground-detector interface.
  • Contains the sense resistor connected to the resistor network across the field.
  • Switches between M1 and M2 detector sources under controller C in redundant systems.
A low-frequency +/-50 V square wave is applied to one end of the sense resistor.

Leakage current develops the voltage that returns to the paired EGDM channel.

One nine-conductor cable carries both control and sense signals between EXAM and EGDM.

For attenuator-loop purchasing and available GE references, Apter Power supports the General Electric IS200EXAMG1A Exciter Attenuator Module for GE EX2100 excitation-control service.
General Electric IS200EXAMG1A Exciter Attenuator Module 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.

Signal Attenuation for IS200EXAMG1A

  • Field network: The sense resistor is connected within a resistor network across the generator field.
  • Applied waveform: EGDM supplies a low-frequency square-wave test signal.
  • Current response: A field-to-ground path produces current through the sense resistor.
  • Measurement output: The resistor voltage is returned to EGDM for conditioning and monitoring.

EGDM Interface for IS200EXAMG1A

  • Shared cable: A single nine-conductor cable carries drive, control and sense information.
  • Source channels: The test signal can arrive from the M1 or M2 detector channel.
  • Selection control: Controller C operates the source-selection relay on EXAM.
  • Loop check: The selected source and returned measurement must remain on the same detector path.

Field-Side Wiring for IS200EXAMG1A

  • Location: EXAM is installed in the auxiliary cabinet near the field-side network.
  • Sense resistor: Both resistor connections must remain matched to the documented field circuit.
  • Polarity: Field-side lead identity is retained when the module is disconnected.
  • Clearance: Inspection covers insulation condition around the high common-mode sensing circuit.

Protection-Loop Test for IS200EXAMG1A

  • Master selection: Command each available M1 or M2 source through controller C.
  • Drive signal: Confirm the low-frequency test waveform reaches the EXAM resistor.
  • Sense return: Verify that the developed voltage reaches the paired EGDM input.
  • System result: Confirm the assigned controller receives and alarms the detector measurement.
Description
In the EX2100 auxiliary cabinet, the General Electric IS200EXAMG1A Exciter Attenuator Module forms the field-side element of the ground-detection circuit. Its sense resistor is connected through a resistor network across the generator field.

The detector drive reaches IS200EXAMG1A as a low-frequency +/-50 V square wave from EGDM. Leakage through a field-to-ground path creates the differential return voltage used to identify insulation deterioration.

Redundant controls allow IS200EXAMG1A to receive the test source from either M1 or M2. Controller C operates the module relay that selects the active source, while a nine-conductor cable carries control and sensing signals between EXAM and EGDM.
Alternative Names
IS200 EXAM G1A General Electric IS200EXAMG1A IS200EXAM-G1A GE EX2100 IS200EXAMG1A IS-200-EXAMG1A IS 200 EXAM G1A GE IS200EXAMG1A IS200EXAMG 1A
Technical notes
IS200EXAMG1A works as the field-side partner of EGDM. Confirm the selected M1 or M2 source and the sense return through the same nine-conductor cable.
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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.
What records are needed before IS200EXAMG1A field wiring is removed?
Record both field-side connections and the paired EGDM cable before removing IS200EXAMG1A.
How can a fault be isolated between IS200EXAMG1A and EGDM?
Check the IS200EXAMG1A sense voltage, nine-conductor cable and EGDM return in sequence so the failed section is identified.
Why test IS200EXAMG1A with the selected M1 or M2 channel?
IS200EXAMG1A switches between M1 and M2 under controller C, so the active source and return channel must agree.
Where is IS200EXAMG1A installed in an EX2100 excitation system?
IS200EXAMG1A mounts in the auxiliary cabinet beside the field-side ground-detection network.
Which cable assignment must be kept when replacing IS200EXAMG1A?
Keep the IS200EXAMG1A nine-conductor control-and-sense cable assigned to the correct EGDM channel.
Can IS200EXAMG1A be verified by continuity alone?
No. IS200EXAMG1A testing should also confirm the applied square wave, sense return and selected-master operation.
What can block source selection inside IS200EXAMG1A?
A missing controller C command or an incorrect M1/M2 path can prevent the IS200EXAMG1A selection relay from using the intended source.