GE DS200FHVAG1A Gate Interface Board

The GE DS200FHVAG1A (functional acronym FHVA, revision variant DS200FHVAG1ADA) is a dedicated, passive High Voltage Gate Interface Board engineered by General Electric. Operating within the GE Speedtronic™ Mark V gas/steam turbine control framework, LS2100 Static Starter Control systems, and Innovation Series Load Commutated Inverters (LCI), this module provides galvanic high-voltage isolation, SCR gate pulse shaping, and SCR cell health telemetry.

Mounted directly at the power bridge assembly (one board required per 77 mm or 100 mm Hockey-Puck SCR thyristor cell), the DS200FHVAG1A bridges the gap between low-voltage digital firing logic generated by the Gate Pulse Amplifier Board (DS200FGPAG1A) and high-potential, medium-voltage power thyristors. The board utilizes a centralized toroidal current transformer (CT) for floating gate power transfer and features an onboard fiber-optic transmitter (U1) providing isolated forward/reverse blocking status back to the bridge controller without common-mode voltage contamination.

Model Details

• Manufacturer: General Electric
• Base Model Number: DS200FHVA
• Catalog Part Number (MPN): DS200FHVAG1A
• Drawing / Revision Number: DS200FHVAG1ADA (Rev A base board with Group 1 functional components and DA revision firmware/artwork profile)
• Functional Acronym: FHVA (Fast High-Voltage Interface / Cell Gate Interface Board)
• Component Quantity Required: 1 Board per individual SCR phase cell (typically 6, 12, or 24 boards per complete 6-pulse or 12-pulse converter bridge)
• boards per complete 6-pulse or 12-pulse converter bridge)
• Applicable Technical Manuals:
  • Parts Manual: GEI-100224
  • System Manual: GEH-6373 (GE Innovation Series LCI / Speedtronic Mark V Integration)

Technical Details:

Key Features

1. Passive High-Voltage Isolation: Operates without requiring an onboard active low-voltage auxiliary power supply; all gate triggering power is induced magnetically via a high-dielectric toroidal gate pulse transformer.
2. Integrated Corona-Resistant Architecture: The printed circuit board features an open central chassis cutout centering the single-turn high-voltage insulated primary cable through the CT core window, preventing corona partial discharge at medium voltage potentials.
3. Galvanic Optical Feedback: Integrated high-speed fiber-optic transmitter (U1) transmits continuous SCR cell status and voltage drop thresholds back to the master Gate Pulse Amplifier board with total electromagnetic immunity.
4. Direct Real-Time Visual Diagnostics: Onboard high-luminance red diagnostic LED (C_STAT) gives field engineers immediate visual confirmation of SCR blocking voltage presence during line energization.
5. Engineered Gate Pulse Conditioning: Integrated rectification, suppression damping, and noise burden circuitry prevents spurious di/dt or dv/dt false triggering caused by switching commutations in adjacent phases.

Applications

• Marine Electric Propulsion & Shaft Starter Inverters: Deployed in medium-voltage synchronous electric propulsion drives, bow thruster drives, and diesel-electric generator load commutators on offshore construction, LNG carrier, and container vessels.
• Gas & Steam Turbine Static Starter Units (LCI): Provides thyristor commutation on GE LS2100 Static Starters during gas turbine starting sequences on GE Frame 5, Frame 6, Frame 7EA/FA, and Frame 9E/FA turbine packages.
• High-Power Variable Frequency Compressor Drives: Utilized in pipeline turbocompressor drives, refinery high-capacity fans, and offshore gas reinjection compressor drives.
• Static VAR Compensators (SVC): Drives large-scale thyristor-switched capacitor (TSC) and thyristor-controlled reactor (TCR) cells in grid-stabilizing medium-voltage substations.

Equipment Compatibility

• Control Platforms: Speedtronic™ Mark V, GE Innovation Series LCI, LS2100 Static Starter Control, Drive Modernization Bridges.
• Upstream Master Drive Board: Directly connects via fiber optics and gate cable harness to the GE DS200FGPAG1A Gate Pulse Amplifier Board.
• Paralleled Protective Components: Interconnects with the external 10 kΩ bridge voltage balancing resistor and RC snubber circuit through E1/E2 fast stabs.

Part Number Cross-References

• DS200FHVAG1A
• DS200FHVAG1ADA
• DS200FHVAG1AAA
• DS200FHVAG1ABA
• 200FHVAG1A
• 36A298132-001 (Internal GE engineering reference)

Frequently Asked Questions

What is the main function of the GE DS200FHVAG1A board?

The GE DS200FHVAG1A provides galvanic isolation, gate pulse shaping, and voltage health monitoring for individual SCR thyristors located in Load Commutated Inverters (LCI) and GE Mark V static starter drive systems.

What is the difference between DS200FHVAG1A and DS200FHVAG1ADA?

The DS200FHVAG1A represents the base catalog group model number, whereas DS200FHVAG1ADA designates the exact factory hardware revision (“DA”). Both revisions are backwards and functionally interchangeable within the specified turbine and starter converter frames.

How does the DS200FHVAG1A communicate SCR status back to the main controller?

It features an onboard high-speed fiber-optic transmitter (U1). By sensing the current across an external 10 kΩ equalization resistor, it emits an optical signal to the upstream DS200FGPAG1A board to confirm if the SCR is in an active blocking state.

Why is the C_STAT LED illuminated or dim on my board?

The C_STAT red LED is a diagnostic indicator that confirms the presence of forward/reverse blocking voltage across the SCR cell. It glows brightly when bridge power is applied and dims as the SCR firing angle increases toward continuous conduction.

Does the DS200FHVAG1A board require an external power supply to operate?

No. The DS200FHVAG1A is a passive unit. It extracts required triggering power inductively from the gate pulse current transformer centered on the high-voltage conductor, eliminating the need for dedicated low-voltage auxiliary cabling.