GE DS200SVIAG1ABB Shunt Isolator Card

الوصف

The GE DS200SVIAG1ABB Shunt Isolator Card is a specific model of the ¹$\text{Shunt Isolator Board}$ (²$\text{SVI}$) designed for the General Electric Mark V Speedtronic Turbine Control System or its associated Drive Control Series.³

Its function is to measure high current indirectly and provide electrical isolation between the high-power circuit and the sensitive electronic control system.⁴

Function and Purpose

The Shunt Isolator Card serves as a critical interface for current feedback:

1. Current Measurement: The board receives a low-level voltage signal from a shunt resistor placed in the main power circuit of the drive (which often controls large motors or exciters in the turbine system).⁵ This shunt voltage is directly proportional to the high current flowing through the circuit (⁶$V_{\text{shunt}} = I \times R_{\text{shunt}}$).⁷

    

2. Electrical Isolation: The board uses components like optocouplers or transformers to provide a galvanic barrier, completely separating the high-power side from the low-voltage control side.⁸ This is its most important job, as it:

    

   • Protects the vulnerable Mark V microprocessor and ⁹$\text{I/O}$ circuits from high voltages, power surges, and transients.¹⁰

      

   • Eliminates ground loops and electrical noise that could degrade the accuracy of the current measurement.
3. Signal Conditioning: It conditions and amplifies the minute shunt voltage, converting it into a clean, scaled, and isolated analog signal suitable for the Mark V’s analog-to-digital converters (ADCs). This signal is then used by the control system for:
   • Feedback Control: Maintaining precise current and torque control.
   • Protection: Detecting overcurrent conditions to initiate a trip or shutdown.

Part Number Breakdown

The full part number $\text{DS200SVIAG1ABB}$ contains key revision and configuration information: