GE IS200EGDMH1ADE Exciter Ground Detector Module

IS200EGDMH1ADE Exciter Ground Detector Module

The IS200EGDMH1ADE Ground Detection Module is used in the EX2100 Excitation Control. It is a double slot, double height (6U) form factor board that mounts in the Exciter Power Backplane rack (EPBP). The field ground detector detects field leakage resistance between any point in the generator field circuit to ground, either on the ac or dc side. A simplex system will have one EGDM, and a redundant system will have three. The location of the EGDM(s) is shown in Figure 1. EXAM, the attenuator module, senses the voltage across the ground sense resistor and sends the signal to the EGDM(s) over a nine-conductor cable. The EXAM module is mounted in the High Voltage Module located in the Auxiliary Panel.

In a redundant control, the set of three EGDM boards are configured as 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. Information on which master provides the drive signal to the sense resistor in the Attenuator Module is sent from the DSPX, through the EISB in the controller rack, to EGDM C. Upon receiving this information over the fiber-optic link, C either powers the relay in the Attenuator Module if M2 is the driver, or leaves it unpowered if M1 is the chosen master. At the same time a differential signal is sent to M1 and M2 that indicates the chosen master. This signal enables the signal generator on the active master and selects the test command source on each module (M1, M2 and C). Now the active master receives an Oscillator Signal over the fiber optic link from the DSPX through the EISB that it converts to a positive or negative 50-volt signal. This square wave voltage is sent by cable to the EXAM module and applied to one end of the Sense Resistor.

Technical Specifications

100% brand new and original,All the goods will be tested before shipment.

For the in stock items, we will send the order out within 5-7 days after receive the payment.

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Topteng offers a 12-month warranty from the date of delivery.

In the event of non-conforming product ( if damaged or incorrect product is received ),

Any nonconformity must be reported within 7 days of receipt of goods.

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