GE DS2020FECNRP025A Field Exciter Board

GE DS2020FECNRP025A Field Exciter Board

The GE DS2020FECNRP025A Field Exciter Board is a specialized power electronic circuit board assembly used in General Electric Mark V Speedtronic Turbine Control Systems and industrial drives like the DC2000 Series.1

Its function is essential for the stable control of large synchronous motors and generators.2

⚡ Core Function and Capacity

The module’s primary role is to provide and precisely regulate the Direct Current (3$\text{DC}$) excitation to the field winding of a synchronous machine.4

  • Excitation Control: It is the power component that manages the 5$\text{DC}$ current flow to the field winding, which creates the machine’s magnetic field.6 This control is critical for regulating the generator’s output voltage and reactive power ($\text{VAr}$).
  • Current Rating: The 025A in the part number indicates its maximum 7$\text{DC}$ current capacity, rated for 25 Amps of field excitation.8 This module is compatible with fields up to $\mathbf{24 \text{ Amps}}$.
  • Designation:
    • FECN stands for Field Exciter Control Non-reversing.9
    • NRP (Non-Reversing Plugging) indicates it is compatible with Plugging field supplies, where the field current may be briefly reversed for controlled, rapid motor deceleration.10
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The GE DS2020FECNRP025A Field Exciter Board is a specialized power electronic circuit board assembly used in General Electric Mark V Speedtronic Turbine Control Systems and industrial drives like the DC2000 Series.1

Its function is essential for the stable control of large synchronous motors and generators.2

⚡ Core Function and Capacity

The module’s primary role is to provide and precisely regulate the Direct Current (3$\text{DC}$) excitation to the field winding of a synchronous machine.4

  • Excitation Control: It is the power component that manages the 5$\text{DC}$ current flow to the field winding, which creates the machine’s magnetic field.6 This control is critical for regulating the generator’s output voltage and reactive power ($\text{VAr}$).
  • Current Rating: The 025A in the part number indicates its maximum 7$\text{DC}$ current capacity, rated for 25 Amps of field excitation.8 This module is compatible with fields up to $\mathbf{24 \text{ Amps}}$.
  • Designation:
    • FECN stands for Field Exciter Control Non-reversing.9
    • NRP (Non-Reversing Plugging) indicates it is compatible with Plugging field supplies, where the field current may be briefly reversed for controlled, rapid motor deceleration.10

⚙️ Technical and System Context

Feature Detail
Product Series GE Mark V (DS2020 Family)
Current Rating $\mathbf{25 \text{ Amps DC}}$ (Maximum)
Input Power Typically $\mathbf{600 \text{ V AC}}$ ($\pm 10\%$), Single-Phase
Connectors Features seven jumpers ($\text{JP}1$ through $\text{JP}7$) for configuration and two terminal blocks (TB1 and TB2), each with three terminals.
Mounting Typically mounts on standoffs over another component in the drive system.
Purpose Ensures precise and stable voltage/current levels, contributing to the overall efficiency and reliability of the power system.

This board is part of a modular, high-reliability system designed for critical industrial applications like turbine control.

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