High-Capacity Industrial Power Transformers
Sahara Transformers engineers and manufactures premium 3-phase oil-immersed Power Transformers designed for unbroken continuous operation, maximum energy efficiency, and superior dielectric withstand strength. Built specifically to handle intense thermal stress and severe electrical loads in utility grids, heavy industrial manufacturing plants, and renewable energy substations.
Utilizing high-permeability Cold-Rolled Grain-Oriented (CRGO) silicon steel cores and 99.9% pure electrolytic copper windings, our power transformers deliver optimized voltage regulation with exceptionally low no-load and load losses in strict compliance with international standards including IEC 60076, IS 2026, ANSI, and IEEE.
Core Technical Specifications & Design Ratings
Our power transformers are custom-engineered to meet precise client grid requirements, ambient site conditions, and voltage ratio tolerances. Every unit undergoes rigorous electromagnetic field analysis and thermal flow modeling prior to fabrication.
| Specification Parameter | Engineering Standard & Value Scope |
|---|---|
| Power Handling Capacity | 250 kVA up to 10 MVA (Single & 3-Phase designs) |
| Primary Voltage Class | 11kV, 22kV, 33kV (Custom primary voltages upon request) |
| Frequency Rating | 50 Hz / 60 Hz global compatibility |
| Vector Group Configurations | Dyn11, Dyn5, Ynd11, Star-Delta custom vector groupings |
| Tapping Arrangement | Off-Circuit Tap Changer (OCTC) or On-Load Tap Changer (OLTC) with RTCC panel |
| Core Construction | Low-loss, step-lap mitered CRGO silicon steel laminations |
| Insulation Class | Class A insulation (Thermal rating engineered for tropical environments) |
| Tank Construction | Hermetically sealed or conservator type with anti-corrosion poly-urethane paint coating |
Engineering & Design Advantages
- High Short-Circuit Withstand Capacity: Rigid mechanical clamping structure withstands severe electromagnetic short-circuit stresses.
- Superior Loss Reduction: Engineered in alignment with IS 1180 Amendment 1 energy efficiency guidelines to cut long-term operational expense.
- Low Partial Discharge & Noise: Vacuum drying and precision oil impregnation ensure low partial discharge (< 10 pC) and reduced acoustic noise levels.
- Robust Thermal Management: Designed with optimized cooling channels in windings to prevent localized hot spots during continuous overload conditions.
Target B2B Industry Applications
- Power Generation & Distribution Utilities: Grid stepping, distribution substations, and transmission interconnections.
- Heavy Industrial & Manufacturing Plants: Steel rolling mills, cement manufacturing, chemical complexes, and automotive facilities.
- EPC & Infrastructure Projects: Commercial complexes, data centers, airports, metro rail substations, and seaport terminals.
- Renewable Energy Substation Interconnects: Solar PV power plants, wind farm step-up substations, and microgrids.
Stringent Factory Quality Assurance & Routine Testing
Operating under a certified ISO 9001:2015 quality control framework since 2007, Sahara Transformers subjecting 100% of manufactured units to exhaustive factory routine tests prior to export packaging and shipment:
Routine Electrical Tests
Winding resistance measurement, Voltage Ratio & Vector Group check, Separate Source AC Withstand Voltage test, Induced Overvoltage test, and Insulation Resistance (IR) test.
Oil Quality & Dielectric Analysis
Breakdown Voltage (BDV) testing, Moisture Content analysis, and Dissolved Gas Analysis (DGA) to guarantee mineral insulating oil purity and stability.
Type & Special Test Readiness
Type tested at independent accredited laboratories for Lightning Impulse Voltage Withstand, Temperature Rise Test, and Short-Circuit Withstand Capability.