One-sentence summary
SDCS-POW-4-SD is ABB DCS800’s flagship power unit that squeezes line rectifier, pre-charge, DC bus and chopper into a 3-U drawer-style module. Slide it in and you have a 4-Q regenerative or 2-Q non-regenerative drive ready to run—250 kW–520 kW stand-alone, 2 MW in parallel, hot-swappable and interchangeable, cutting downtime from days to minutes.
Why field engineers love it
1. Blind-swap design: rail plus fool-proof pin, one person, 15 s, no torque wrench needed.
2. Zero-tool maintenance: quick-release front plate, rotary fuse holder, visual fuse window—inspection done in 2 min.
3. Self-healing fan: individual blade replacement; even if a bearing seizes, airflow continues until the next scheduled stop.
4. Built-in health check: temperature, air-pressure, fuse and thyristor status sent via fibre to the upstream PLC—open a Work Order remotely.
Energy-chain snapshot
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Role
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What SDCS-POW-4-SD does inside
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Value to the system
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Line side
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6-pulse thyristor bridge + pre-charge contactor
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380–690 V AC wide range, inrush < 1.5 In, no external soft-starter
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DC side
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Low-inductance bus-bar + film-capacitor bank
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Bus ripple ≤ 3 %, 100 % load dump without trip
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Brake side
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Internal chopper + external resistor terminals
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100 % rated power continuous braking, duty 5 s ON / 95 s OFF
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Parallel side
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Fibre optic current sharing + auto-addressing
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Up to 4 cubicles, current imbalance < 5 %
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Key boundary data
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Parameter
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Value
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Note
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Rated output current
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1 000 A @ 40 °C
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No derating; 120 % 60 s overload built-in
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Short-time current
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1 500 A / 10 s
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For fan acceleration or rolling-mill bite
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Protection class
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IP20 (IP42 hood option)
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Floor-mounted switch-room, side-in / top-out airflow
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Noise
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≤ 68 dB(A) @ 1 m
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Temperature-controlled speed; night mode –6 dB
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Dimensions
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3 U × 600 mm × 417 mm
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19" rack compatible; front or rear cable entry
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Weight
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38 kg
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11 kg lighter than POW-4; two-person lift
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Typical snap-shots
High-speed wire rod finishing: at 75 m/s tail-out, DC-bus voltage sag < 2 %—no trip, no strip break.
Shipboard deck winch: 690 V ship supply variation +15 %/–20 %; POW-4-SD auto-triggers “weak-grid mode” and keeps constant tension.
Hot-strip mill F1–F7: 7 units in parallel, 6 MW total. Roll change time 15 min; power modules slide out with the roll rack, maintenance shift cut by 40 %.
20 years channel, 1-hour quotation
PLC Autocontroller’s Xiamen warehouse keeps complete units and wear parts (thyristors, fuses, fans, capacitor boards) on the shelf. Order today, ship today. “Swap-first, repair-later” service: faulty unit back to us, inspection report and repair quote within 48 h—your spares budget stays transparent and controllable.
Sales contact: May
ab@mooreplc.com
+86-18106909650 (WhatsApp)
WeChat: dcsfcs
What happens next?
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Your quote
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