Part Number:
IS200EGDMH1A IS200EGDMH1AABWeight:
0.4kgDimensions:
4cmX18.6cmX26.1cmManufacture Year:
2021Place of Origin:
USACertification:
CO,CQDescription:
General Electric/GE Fanuc IS200ESELH1A IS200ESELH1AAA EX2100 Exciter Field Ground Detector Board
|
Manufacturer: |
General Electric |
|
Part Number: |
IS200EGDMH1A IS200EGDMH1AAB |
|
Series: |
Mark VI |
|
Full Description: |
General Electric IS200EGDMH1A IS200EGDMH1AAB
Exciter Field Ground Detector Board (EGDM)
|
|
Status: |
In stock |
| Warranty | 12 Months |
Technical Specifications
Functional Acronym (Abbreviation) EGDM
Instruction Manual Number GEI-100467 (GEH-6632 Series Manual)
Manufacturer GE Energy
Mounting Location Exciter Power Backplane Rack (EPBP)
Product Type Exciter Field Ground Detector Module
Series / Product Line Excitation Control System EX2100
Simplex System Qty 1 EGDM Used
Weight 1lbs 3oz
Wiring Board Description Bridge and Protection Module
The IS200EGDMH1A is a PCB/Printed Circuit Board component for the General Electric Mark VI series.
Under the GE Speedtronic banner, the Mark VI is GE's fifth gas/steam turbine management series.
On both the ac and dc sides, this PCB uses an EXAM card to detect any field ground leakage current
anywhere in the generator's field circuit to ground.
EGDM Module
The EGDM is a double slot, double height (6U) form factor board that mounts in the
Exciter Power Backplane rack (EPBP). A simplex system has one EGDM, while a
redundant system has three. EGDM detects field leakage resistance from any point
in the field circuit of the generator to ground, either on the ac or dc side. The field
ground detector applies a low frequency square wave to the sense resistor connected
to the field circuit. EXAM, the attenuator module located in the Auxiliary Panel,
senses the voltage across the ground resistor and sends the signal to the EGDM
through a nine-conductor cable.
In a redundant system, the set of three EGDM boards are configured as a Controller
(C), Master 1 (M1) and Master 2 (M2). The configuration for each EGDM is
controlled by a set of program pins on the P2 connector. The C controller receives
information from the active DSPX on which EGDM master should provide the drive
signal to the sense resistor in the Attenuator Module. The active master receives an
Oscillator Signal over the fiber optic link that it converts to a ±50 V signal. This is
applied to one end of the sense resistor in the Attenuator Module.
The signal conditioner receives an attenuated (10:1) differential signal from the
Sense Resistor. This is a simple unity gain differential amplifier with a high
common-mode rejection ratio followed by an A-to-D converter (Voltage Controlled
Oscillator VCO). This feeds a fiber-optic transmitter that is cabled to EISB. The
signal conditioner circuitry is powered by an isolated power supply to maintain
personnel and equipment safety due to the high common-mode voltage at the Sense
Resistor.
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