Power Distribution

Vekloud STS 3/3 Phase 4P 63-125A

Technology: STS conversion time ≤ 4ms
Power rating: 63，80，100 & 125 A Models Available
Phase: 4P 3/3 Phase (380V-415V)
Warranty: 1 Year Full Warranty
Description: A 4U rack-mount, three-phase 4-pole static transfer switch that provides A/B source redundancy for critical loads using SCR-based static switching, delivering millisecond transfer (typically ≤4 ms) with S1 priority and automatic return. It supports automatic/manual operation, terminal-block wiring, high efficiency, and operation in standard equipment-room environments.
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Purpose: An automatic A/B power selection system that keeps critical loads powered by switching between Source S1 and Source S2. Under normal conditions, the load stays on S1; if S1 fails or goes out of range, the load transfers to S2 automatically.
Switching technology: Uses SCR (thyristor) modules for millisecond, contactless static transfer.
Transfer speed: Typical transfer time ≤ 4 ms; power-loss transfer < 4 ms.
Auto priority logic: S1 priority by default (auto transfer to S2 on S1 abnormal; auto return to S1 when S1 recovers).
Manual transfer: When both sources are normal, front-panel manual priority transfer between S1 / S2 is supported.
Electrical ratings: Three-phase 380 Vac ±15%, 50/60 Hz (input and output).
Current ratings: 63A / 100A / 125A, 4-pole (4P).
Transfer method: Automatic / Manual, break-before-make.
Sync condition: Supports transfer under synchronous or non-synchronous source conditions (interruption transfer supported).
Connections: Terminal block inputs and output.
Performance: Crest factor 3:1, efficiency ≥ 98%.
Cooling & environment: Forced-air cooling; operating 0–40°C, 0–90% RH (non-condensing); altitude <1500 m; max temperature rise <60°C.
Rack / mechanical: 4U, size 440 × 490 × 176 mm (D×W×H); weight ~18 kg.