What is the function of GE IS200EXAMG1A?

It attenuates and senses the generator or exciter field network so the EX2100 ground detector can evaluate leakage resistance to ground.

Where is GE IS200EXAMG1A installed?

The EXAM module is mounted in the auxiliary cabinet, at the high-voltage field interface rather than in the controller rack.

Which EX2100 boards work with GE IS200EXAMG1A?

It operates with EGDM ground-detector modules or an EROC options board, depending on the control arrangement.

What signal is applied through GE IS200EXAMG1A?

The detector supplies a low-frequency ±50 V square wave to one end of the EXAM sense resistor.

How does GE IS200EXAMG1A return the field measurement?

Voltage developed across the sense resistor is carried back to the detector, where isolated conditioning and conversion produce the measurement.

How is the detector selected in a redundant GE IS200EXAMG1A system?

A relay in EXAM switches between the M1 and M2 test sources under controller-C control.

When are two GE IS200EXAM modules used?

An Alterrex application can use separate EXAM/EROC pairs for the exciter field and the generator field circuits.

What should be verified after replacing GE IS200EXAMG1A?

Check the exact model, resistor-network wiring, dedicated detector cable, redundancy selection and the complete field-ground detection alarm test.

IS200EXAMG1A

Name: IS200EXAMG1A
Brand: General Electric
SKU: IS200EXAMG1A

Exciter Attenuator Module

Product image is representative; revision or series may vary. Contact us to request a specific version.

Product Describe：

GE IS200EXAMG1A provides the high-voltage field-side attenuation and sensing element for EX2100 field-ground monitoring. It mounts in the auxiliary cabinet and exchanges the applied test waveform and measured resistor voltage with the ground detector over its dedicated cable.

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Technical specifications for IS200EXAMG1A

Manufacturer:

General Electric
Product Category:

General Automation
Spare Part Number:

IS200EXAMG1A
Estimated shipping dimensions:

23x19.2x3.2cm
Weight:

0.5 kg
Tariff Code:

8537101190
Counliy of origin:

USA
Control platform:

GE EX2100 excitation control
Functional acronym:

EXAM
Module role:

Exciter attenuation and field-ground sensing
Installation area:

Auxiliary cabinet / high-voltage interface area
Applied test signal:

Low-frequency ±50 V square wave supplied by the ground detector
Sensing element:

Sense resistor within a field-connected resistor network
Detector interface:

Single control-and-sense cable to EGDM or EROC
Redundant operation:

Detector-source selection controlled between M1 and M2 through controller C

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Information

Overview Manuals Common Applications Product Precautions

GE IS200EXAMG1A sits between the generator field network and the EX2100 ground-detection electronics rather than inside the normal controller I/O path. Its resistor network scales the field potential, applies the EGDM/EROC test signal to the sense resistor and returns the resulting differential measurement for leakage-resistance calculation.

Auxiliary-cabinet field-ground attenuation module
Sense resistor connected to the generator field network
Works with EGDM or EROC ground-detection hardware
Dedicated control and sense cable between detector and EXAM

The operating chain runs from Generator or exciter field circuit → IS200EXAMG1A resistor and attenuation network → EGDM or EROC ground detector → EX2100 controller alarms and protection response; document each boundary and prove the intended final response before release.

Important Notice: Discharge and prove the field circuit safe before working on the EXAM resistor network or its dedicated detector cable.

GE IS200EXAMG1A Manuals & Downloads

GE IS200EXAMG1A Technical Reference (PDF)GE IS200EXAMG1A Installation & Commissioning Guide (PDF)

The Technical Reference combines the exact GE parts-list entry with the relevant EX2100 EXAM and ground-detector pages. The independent field guide covers isolation, cable checks, redundant-source proving and handover.

Generator field monitoring

Forms the field-side measurement path for insulation-to-ground supervision.

Exciter field monitoring

Supports a separate EXAM/EROC channel in Alterrex arrangements.

Redundant EX2100 control

Selects between M1 and M2 detector sources under controller-C command.

Ground-fault diagnostics

Provides the scaled differential signal used to evaluate field leakage resistance.

Apply these controls specifically to GE IS200EXAMG1A before isolation, replacement, reconnection, energization and final release.

Treat IS200EXAMG1A and its field resistor network as high-voltage equipment even when the controller cabinet is isolated.

Apply the site's approved generator-field discharge and absence-of-voltage test before touching the EXAM wiring.

Preserve the complete IS200EXAMG1A identity and do not substitute a different EXAM group without an engineered review.

Label the field, sense, control and detector connections before removing the module from the auxiliary cabinet.

Inspect the dedicated cable and its shield/ground arrangement before reconnecting EGDM or EROC.

In redundant systems, confirm the controller-C selection relay transfers the test source between M1 and M2 as designed.

Do not megger or inject an external test voltage through the EXAM circuit unless the approved EX2100 procedure permits it.

After work, perform the documented ground-detection functional test and verify alarms without leaving the field circuit energized unattended.

Technical notes

Maintain the auxiliary-cabinet high-voltage boundary and preserve every field-resistor, detector and shield connection. Validate detector-source selection and the complete ground-detection alarm path before return to service.

FAQ View All FAQ

What is the function of GE IS200EXAMG1A?

It attenuates and senses the generator or exciter field network so the EX2100 ground detector can evaluate leakage resistance to ground.
Where is GE IS200EXAMG1A installed?

The EXAM module is mounted in the auxiliary cabinet, at the high-voltage field interface rather than in the controller rack.
Which EX2100 boards work with GE IS200EXAMG1A?

It operates with EGDM ground-detector modules or an EROC options board, depending on the control arrangement.
What signal is applied through GE IS200EXAMG1A?

The detector supplies a low-frequency ±50 V square wave to one end of the EXAM sense resistor.

How does GE IS200EXAMG1A return the field measurement?

Voltage developed across the sense resistor is carried back to the detector, where isolated conditioning and conversion produce the measurement.
How is the detector selected in a redundant GE IS200EXAMG1A system?

A relay in EXAM switches between the M1 and M2 test sources under controller-C control.
When are two GE IS200EXAM modules used?

An Alterrex application can use separate EXAM/EROC pairs for the exciter field and the generator field circuits.
What should be verified after replacing GE IS200EXAMG1A?

Check the exact model, resistor-network wiring, dedicated detector cable, redundancy selection and the complete field-ground detection alarm test.

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