GE IS200EDCFG1A Exciter DC Feedback Board

GE IS200EDCFG1A Exciter DC Feedback Board

د.إ8,888.00

GE IS200EDCFG1A Exciter DC Feedback Board (EDCF) is a critical component of the GE EX2100 Excitation Control System.1 Its fundamental role is to provide precise, isolated, high-speed feedback of the generator’s Field Current and Field Voltage to the main control system.2

This feedback is essential for the EX2100 system to perform closed-loop control of the SCR (Thyristor) bridge, thereby regulating the generator’s output voltage and reactive power.3

⚙️ Core Functions and Measurement

The EDCF board is situated near the SCR bridge in the exciter power cabinet and is designed to handle high-voltage and high-noise environments.4

1. Field Current Measurement

  • Measurement: Field current is measured across a DC shunt located at the SCR bridge.5
  • Signal Conditioning: The shunt generates a low-level signal (up to a maximum of 500 mV).6 This signal is then fed into a differential amplifier, which outputs a voltage ranging from 7$-5\text{ V}$ to 8$+5\text{ V}$ into a voltage-controlled oscillator (VCO).9
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الوصف

The GE IS200EDCFG1A Exciter DC Feedback Board (EDCF) is a critical component of the GE EX2100 Excitation Control System.1 Its fundamental role is to provide precise, isolated, high-speed feedback of the generator’s Field Current and Field Voltage to the main control system.2

This feedback is essential for the EX2100 system to perform closed-loop control of the SCR (Thyristor) bridge, thereby regulating the generator’s output voltage and reactive power.3

⚙️ Core Functions and Measurement

The EDCF board is situated near the SCR bridge in the exciter power cabinet and is designed to handle high-voltage and high-noise environments.4

1. Field Current Measurement

  • Measurement: Field current is measured across a DC shunt located at the SCR bridge.5
  • Signal Conditioning: The shunt generates a low-level signal (up to a maximum of 500 mV).6 This signal is then fed into a differential amplifier, which outputs a voltage ranging from 7$-5\text{ V}$ to 8$+5\text{ V}$ into a voltage-controlled oscillator (VCO).9

2. Field Voltage Measurement

  • Measurement: Field voltage is measured across the negative terminal of the bridge and the positive terminal of the current shunt.10
  • Scaling: The voltage feedback circuit provides seven selector settings (jumper-selectable) to scale down the high bridge voltage to a manageable level.11
  • Signal Processing: The scaled voltage is then input into a differential amplifier, which controls another VCO.12

3. Isolated Communication (The Key Feature)

A crucial feature of the EDCF board is its interface with the main control panel:13

  • Fiber-Optic Link: The conditioned current and voltage feedback signals are transmitted to the EISB (Exciter Interface Signal Board) in the control cabinet via high-speed fiber-optic links (two fibers are used: one for current, one for voltage).14
  • Benefits: This fiber-optic link provides superior noise immunity and voltage isolation between the high-power bridge circuit and the sensitive control electronics, which is vital for system reliability and safety.15

🛠️ Technical Specifications

Feature Details
System GE EX2100 Excitation Control System
Function Measures Field DC Current and DC Voltage at the SCR Bridge
Communication High-Speed Fiber-Optic Link (to EISB board)
Voltage Scaling 7 Jumper-Selectable Settings for Field Voltage
Power Supply Requires an external $\pm 24\text{ V DC}$ source (regulated to $\pm 15\text{ V DC}$ and $+5\text{ V DC}$ internally)
Diagnostics Includes a PSOK (Power Supply OK) green LED indicator.

The IS200EDCFG1A is thus the critical link that transforms high-power DC measurements into a highly accurate, noise-immune digital signal for the EX2100 controller.16

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