"Built for performance, safety and sustainability STS delivers trusted solutions across every environment"
Our Offerings
Power Transformers
Built with advanced cooling systems and durable materials, they support utilities, industries, and large infrastructure projects. Real-time monitoring and smart diagnostics enable predictive maintenance and optimized performance. Ideal for grid stability, renewable integration, and high-demand environments, these transformers combine cutting-edge technology with robust construction to deliver uninterrupted power and enhance sustainability in modern energy systems.
Key Benefits:
✔ Low maintenance & high durability
✔ Advanced insulation and cooling systems
✔ Low noise (<65 dB) for urban substations
✔ Global compliance (IEC, ANSI) for grid resilience
Distribution Transformers
STS Distribution Transformers deliver energy-efficient power distribution, ensuring reliable electricity supply with minimal energy loss. Available in both dry-type and oil-cooled variants, they offer compact, fire-safe designs that meet stringent safety standards for commercial complexes, residential high-rises, and industrial facilities while providing quiet operation and low maintenance for hassle-free performance in diverse environments.
Key Benefits:
✔ Fire-safe designs (IP54 rated) for crowded areas
✔ 30% lower losses vs. industry standards
✔ Custom taps for grid stability in smart cities
✔ Real-time Performance Monitoring System
Solar Inverter Duty Transformers
Specialized for renewable energy systems, STS Solar Transformers enable seamless conversion for solar farms and wind plants. Built for minimal downtime enabling seamless renewable integration, they feature optimized cooling and insulation systems to ensure consistent performance in diverse environmental conditions.
Key Benefits:
✔ Available options: Solar Duty (DC-AC) and Rectifier (AC-DC)
✔ Lower greenhouse emissions
✔ Real-time monitoring for predictive maintenance
✔ Weather-resistant designs for harsh environments
Dry-Type Transformers
Designed for critical indoor installations, they eliminate oil-related hazards while delivering reliable performance in hospitals, data centers and commercial complexes.
Key Benefits:
✔ Zero oil leaks or contamination
✔ Self-extinguishing properties (UL certified)
✔ -10 dB noise reduction for sensitive environments
✔ Real-time Performance Monitoring System
Rail Traction Transformers
STS Railway Transformers power locomotives and metro systems with high-efficiency energy conversion. Designed to endure mechanical stress and surges, they guarantee uninterrupted rail operations.
Key Benefits:
✔ Weather & Vibration-resistant cores (IP65 rated)
✔ Compact, lightweight designs
✔ Compliant with rail safety norms
Furnace Transformers
Engineered for metallurgical industries, STS Furnace Transformers deliver high-current power for Arc/Induction furnaces. Their robust construction ensure consistent 24/7 heavy-duty use
Key Benefits:
✔ High-current loads (up to 15000 kVA)
✔ Dust & heat-resistant
✔ Real-time monitoring for predictive maintenance
Compact Sub-station
STS Compact Substations are pre-fabricated, all-in-one power units combining transformers, switchgear, protection controls and IoT monitoring for fast deployment. Designed for smart cities, hospitals, and industrial zones, they deliver plug-and-play feature with Smart monitoring systems for remote management and reduced downtime.
Key Benefits:
✔ 30% faster installation – Pre-wired and tested for reliability
✔ Noise-free (<50 dB) – Safe for schools, hospitals
✔ Fire-retardant panels – Safe for high-risk areas & Smart cities
✔ IoT-enabled – Remote diagnostics & predictive maintenance
Single Phase Transformers
STS Single Phase are compact and cost-effective, they are ideal for rural electrification, lighting systems, and equipment that require stable single-phase power. Designed for both pole-mounted and pad-mounted installations, they offer superior insulation and thermal performance.
Key Benefits:
✔ Compact, lightweight design for easy installation
✔ Available in oil-filled and dry-type variants
✔ Suitable for remote areas and low-load zones
At STS, we understand that every power application has unique demands. That’s why we offer fully customizable transformers from technical specifications to specialized fittings ensuring optimal performance for your specific requirements
Technical Specifications
Transformer | Rating (KVA) | Voltage class (KV) | Winding Material | Number of Phase | Frequency (Hz) | Cooling type | Tapping Type |
Distribution | 63-2000 | 11/22/33 | Al / Cu | 3-Ph | 50 / 60 | ONAN | Off Load / On Load |
Power | 2500-10000 | 22/33/66 | Cu | 3-Ph | 50 / 60 | ONAN / ONAF | Off Load / On Load |
Solar (IDT) | 250-10000 | 11/22/33 | Al / Cu | 3-Ph | 50 / 60 | ONAN | Off Load / On Load |
Dry Type | 100-3000 | 11/22/33 | Al / Cu | 3-Ph | 50 / 60 | AN | Off Load / On Load |
Railway | 25-2000 | 11/22/33 | Al / Cu | 3-Ph | 50 / 60 | ONAN | Off Load / On Load |
Furnace | 250-2000 | 11/22/33 | Al / Cu | 3-Ph | 50 / 60 | ONAN | Off Load / On Load |
Isolation | 63-1000 | Low to Low voltage | Al / Cu | 3-Ph | 50 / 60 | ONAN | Off Load / On Load |
Single Phase | 5-25 | 11 | Al / Cu | 1-Ph | 50 / 60 | ONAN | Off Load |
Fitting Options
Standard Fittings
Silica gel Breather
Air release plug
vent pipe / Pressure release valve
Drain Valve
Top Filter valve
Oil level gauge
Conservator
Rating and diagram plate
Arching horns
LV cable box / Bus Duct arrangement
Lifting lugs
Tank grounding provision
Primary / Secondary bushing
Optional Fittings
Oil temperature indicator
Winding temperature indicator
Marshalling box
Buchholz relay
Magnetic oil level gauge (MOG)
HV Cable box
Off Load / On Load tap changer
Rollers
Smart Monitoring System
Industry specific customization