Reliable Power Transformers
Manufacturer of high-efficiency dry-type and oil-immersed transformers for industrial projects.
IEC 60076 · ONAN/ONAF Cooling · Hermetically Sealed
Oil-Immersed Transformers
100Power Oil-Immersed Transformers are hermetically sealed, IEC 60076-compliant power transformers available in S11, S13 and S20/SBH series from 50 kVA to 10 MVA, with ONAN/ONAF cooling, optional on-load tap changer (OLTC), and Buchholz protection for industrial and utility power distribution.
High-capacity power distribution transformers (S11, S13, S20 series) with hermetically sealed tank, ONAN/ONAF cooling, and amorphous core options for utility grids, industrial plants, and renewable energy integration. Capacity range: 30kVA to 150MVA.
Request Technical Datasheet →Product Series Overview
Choose from standard efficiency to ultra-low loss amorphous core designs
S11 Series
Proven reliability for general distribution applications. Silicon steel core with optimized design for cost-effective performance.
30kVA – 20MVA capacity
HV up to 35kV
No-load loss: ≤1.2W/kg
S13 Series
Low-loss design meeting global efficiency standards. Premium grade silicon steel core for reduced energy consumption and lower TCO.
DOE 2025 / Ecodesign compliant
20-30% lower no-load loss vs S11
HV up to 110kV available
S20/SBH Series
Ultra-low loss amorphous metal core for maximum energy savings. Ideal for 24/7 critical loads where standby losses matter most.
70-80% lower no-load loss
Fastest ROI for low-load scenarios
30kVA – 2500kVA range
Standard Features & Options
Tank & Construction
Hermetically Sealed Tank
Welded steel tank with nitrogen blanket or full-fill design. No conservator needed, eliminating moisture ingress.
ONAN/ONAF Cooling
Natural or forced air cooling with corrugated radiators. ONAN for base load, ONAF for overload capacity.
On-Load Tap Changer (OLTC)
Optional OLTC for automatic voltage regulation under load. ±8 x 1.25% or custom tap range available.
Protection & Monitoring
Buchholz Relay
Gas and oil flow detection for early fault warning. Alarm and trip contacts for SCADA integration.
Winding Temperature Indicator
Thermal image simulation for accurate winding hotspot monitoring. With 4-20mA output option.
Pressure Relief Device
Self-resealing pressure relief valve for tank overpressure protection. Optional rupture disc for extreme events.
Need a Custom Oil-Immersed Solution?
From utility-scale distribution to industrial process power, our engineering team designs transformers to your exact specifications. Submit your requirements for a detailed technical proposal and factory pricing.