Description
Key Technical Specifications
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Model Number: DS200IQXSG1AAA
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Manufacturer: General Electric
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Input Voltage: 100-240 VAC, 47-63 Hz
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Gate Outputs: ±15 V isolated, 2 A peak per IGBT leg via 6 × ST fiber ports
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Snubber Network: Film capacitor + resistor network, dv/dt clamp <500 V/µs
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Isolation: 2.5 kV optical on fibers, 1500 V card-to-ground
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Connectors: 8 × terminal blocks (E1-E8), 1 × 8-pin auxiliary, 6 × ST fiber
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Operating Temperature: –40 °C to +85 °C
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Board Size: 6.25 in × 5 in (159 × 127 mm)
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Weight: ≈1 kg
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Construction: Non-repairable, conformal-coated, aluminum heat-spreader plate
DS200IQXSG1AAA
Field Application & Problem Solved
A steel-mill run-out table drive switches 800 A at 650 Vdc—every IGBT turn-off slams a 1 kV spike into the DC link. Without this board you cook bricks every quarter. The IQXS lives in the power stack, clamps the spike with its film-cap snubber, and shoots ±15 V gate pulses down plastic fiber to each IGBT. When a shooter shorts, the on-board fuse pops and the LED goes dark—one glance tells you which leg is hurt. Swap time is under five minutes; every mill keeps a spare bolted to the roof. Bottom line: cheap board keeps expensive silicon alive and prevents the Mark V from throwing “GATE UNDER-V” trips that drop the whole line.
A steel-mill run-out table drive switches 800 A at 650 Vdc—every IGBT turn-off slams a 1 kV spike into the DC link. Without this board you cook bricks every quarter. The IQXS lives in the power stack, clamps the spike with its film-cap snubber, and shoots ±15 V gate pulses down plastic fiber to each IGBT. When a shooter shorts, the on-board fuse pops and the LED goes dark—one glance tells you which leg is hurt. Swap time is under five minutes; every mill keeps a spare bolted to the roof. Bottom line: cheap board keeps expensive silicon alive and prevents the Mark V from throwing “GATE UNDER-V” trips that drop the whole line.
Installation & Maintenance Pitfalls (Expert Tips)
ST fibers must click twice
A half-seated ST gives 6 dB loss—gate driver sees 7 mA instead of 15 and misfires. Push until you feel the detent, then tug-test. Dust caps off, clean ferrule with IPA every outage.
ST fibers must click twice
A half-seated ST gives 6 dB loss—gate driver sees 7 mA instead of 15 and misfires. Push until you feel the detent, then tug-test. Dust caps off, clean ferrule with IPA every outage.
Snubber cap runs hot—let it cool
The film capacitor is potted in epoxy and sits at bus potential. Swap the card hot and you’ll grab kilovolts through the wrist-strap. Power down, wait five minutes, then pull the latches.
The film capacitor is potted in epoxy and sits at bus potential. Swap the card hot and you’ll grab kilovolts through the wrist-strap. Power down, wait five minutes, then pull the latches.
Input voltage jumpers are NOT cosmetic
Factory default is 240 V. If your site runs 120 V control and you don’t move JP1-JP3, the DC-DC never starts and you’ll chase “NO GATE POWER” faults. Match the jumper table to the as-built drawing.
Factory default is 240 V. If your site runs 120 V control and you don’t move JP1-JP3, the DC-DC never starts and you’ll chase “NO GATE POWER” faults. Match the jumper table to the as-built drawing.
Aluminum plate is live at bus potential
The back-plate is tied to DC-minus. Bolt it to the cabinet while the bus is hot and you’ll strike an arc across the mounting hole. Always rack the breaker before you swap the board.
The back-plate is tied to DC-minus. Bolt it to the cabinet while the bus is hot and you’ll strike an arc across the mounting hole. Always rack the breaker before you swap the board.
DS200IQXSG1AAA
Technical Deep Dive & Overview
Internally the card is a forward-converter plus snubber matrix. A 100 kHz switcher generates ±15 V from the 240 VAC feed; each rail hits its own fuse before exiting through ST fibers. The film-cap / resistor network clamps dv/dt to <500 V/µs. Because everything is hardware you can hot-swap with the bridge powered—pull the old card, move fibers one-for-one, snap the 40-pin 1PL, and the SDCC re-acquires gate feedback inside 100 ms. No processor, no firmware, no download—just copper, caps, and light.
Internally the card is a forward-converter plus snubber matrix. A 100 kHz switcher generates ±15 V from the 240 VAC feed; each rail hits its own fuse before exiting through ST fibers. The film-cap / resistor network clamps dv/dt to <500 V/µs. Because everything is hardware you can hot-swap with the bridge powered—pull the old card, move fibers one-for-one, snap the 40-pin 1PL, and the SDCC re-acquires gate feedback inside 100 ms. No processor, no firmware, no download—just copper, caps, and light.
