GE DS200SHVIG1BDH High Voltage Interface Board

الوصف

The GE DS200SHVIG1BDH is a highly specific revision of the SCR High Voltage Interface Board (SHVI) used in the GE Mark V Speedtronic Turbine Control System and the DC2000/EX2000 Drive Series.¹

Its primary function is to serve as the isolated, signal-conditioning buffer that safely translates critical high-voltage and high-current feedback from the power section (the SCR bridge) into a reliable format for the drive’s low-voltage digital control system.

Core Functions of the DS200SHVIG1BDH

The SHVIG1BDH performs several crucial roles in the drive cabinet:

1. Isolation and Voltage Attenuation²

• Safety Barrier: It provides galvanic isolation to protect the sensitive control electronics and personnel from the hazardous high-voltage components of the Silicon Controlled Rectifier ($\text{SCR}$) power bridge.
• Metering: It attenuates (steps down) the high ³$\text{AC}$ line voltage and the ⁴$\text{DC}$ bridge voltage to a low, safe level suitable for the control system’s instrumentation circuits.⁵

   

2. Current Signal Conversion

This is vital for the drive’s closed-loop speed and torque control:

• Shunt Signal Input: It accepts the extremely sensitive, low-level ⁶$\text{mV}$ voltage signals (typically ⁷$\pm 500 \text{ mV}$) generated by the high-current shunts.⁸

   

• Frequency Conversion: It converts these ⁹$\text{mV}$ signals into a robust differential frequency output (ranging from ¹⁰$0 \text{ to } 500 \text{ kHz}$).¹¹ Converting the signal to a frequency makes it highly resistant to the intense electrical noise in the drive cabinet, ensuring accurate transmission to the instrumentation board (SDCI or DCFB).

   

• Configurable Attenuation: The board typically includes up to 17 configurable jumpers that work with ¹²$10:1$ Current Transformers (¹³$\text{CTs}$).¹⁴ This feature provides user-selectable current attenuation to precisely match the board’s calibration to the specific current ratings of the installed power bridge.¹⁵

   

3. System Interfacing and Diagnostics

• Signal Routing: It acts as the bridge that connects the conditioned high-voltage/current feedback to the main control boards, including the Power Supply/Instrumentation Card (SDCI/DCFB) and the Power Connect Card (PCCA).¹⁶

   

• Diagnostics: The board is equipped with three onboard LED indicators that provide an immediate visual alert if a line filter fuse has blown.¹⁷

   

• Contactor Drivers: It often includes the necessary driver circuits for controlling both standard and fast contactors within the power system.¹⁸

   

Part Number Breakdown (DS200SHVIG1BDH)

The multiple trailing letters denote several functional and physical revisions over the life of the G1 SHVI product line:

The DS200SHVIG1BDH is a highly evolved, reliability-focused component that is fundamental to the operational safety and performance of the GE drive system.