Power Distribution

Vekloud STS 1/1 Phase 63-125A

Technology: STS conversion time ≤ 4ms
Power rating: 63，80，100 & 125 A Models Available
Phase: 1/1 Phase (230V)
Warranty: 1 Year Full Warranty
Description: A 2U rack-mount static transfer switch for single-phase 63–125A loads that provides A/B source redundancy, using SCR-based static switching to transfer in milliseconds when the preferred source becomes abnormal. Available in single-cut (shared neutral) and double-cut (switch L+N) versions, it offers high efficiency, terminal-block wiring, and reliable operation for critical single-cord equipment.
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Purpose: An automatic two-source transfer device (Source S1 / Source S2) that keeps single-cord loads continuously powered by switching to the backup source when the preferred source fails.
Switching technology: SCR (thyristor) modules for high-speed, contactless static transfer.
Transfer speed: Typical ≤ 4 ms; also specifies power-loss transfer < 4 ms.
Normal operation logic: When both sources are normal, the load is supplied by S1 and S2 stays on standby; when S1 is abnormal, it transfers to S2 automatically.
Electrical ratings: Single-phase 220 Vac ±10%, 50/60 Hz.
Current ratings / versions: 63A / 100A / 125A with two wiring options: single-cut and double-cut (see below).
Transfer modes: Automatic / Manual, break-before-make switching.
Single-cut vs. double-cut:

Single-cut: switches live (L) with shared neutral (N); intended for same-source inputs.
Double-cut: switches live + neutral (L+N); supports same-source or different-source inputs (sync / non-sync transfer supported).

Performance: Crest factor 3:1, efficiency ≥ 98%.
Connections: High-current terminal blocks for both inputs and output.
Cooling & environment: Fan cooling; 0–40°C operating temperature; installation altitude <1500 m; max temperature rise <60°C.
Mechanical: 2U / 19-inch rack, size 343 × 490 × 88 mm; weight about 7.5–8.0 kg (by rating).