Transformers
Transformers are the backbone of modern power distribution systems, enabling the safe and efficient transfer of electrical energy across voltage levels. At Sanelectro Switchgear, we specialize in manufacturing high-performance transformers for industrial, commercial, and utility applications—using advanced technology, superior-grade materials, and stringent quality control.
Our Expertise
We offer a wide range of transformers tailored to customer-specific requirements:
- Distribution Transformers — Designed for efficient power distribution in residential, commercial, and rural networks.
- Power Transformers — Built for high-capacity transmission systems with superior performance and durability.
Key Features
- High energy efficiency with low losses
- Robust and compact design
- Excellent thermal performance
- Low maintenance and long operational life
- Compliance with national and international standards
- Custom-built solutions as per client specifications
Applications
- Electrical utilities and substations
- Industrial plants and manufacturing units
- Commercial complexes
- Infrastructure and renewable energy projects (solar/wind)
Quality Assurance: Every transformer undergoes rigorous testing and inspection to ensure optimal performance, safety, and compliance with industry standards.
Distribution Transformers
Distribution transformers are essential for the final stage of power distribution, stepping down high voltage electricity to usable levels for residential, commercial, and industrial applications. Our distribution transformers are designed for maximum efficiency, reliability, and long service life under diverse operating conditions.
Product Range & Ratings
KVA Ratings
- 100 kVA, 160 kVA, 200 kVA, 250 kVA, 315 kVA
- Up To 5 MVA
Voltage Class
- Primary Voltage: 11 kV / 22 kV / 33 kV
- Secondary Voltage: 415 V / 433 V (LT side)
Frequency
50 Hz
Cooling Type
ONAN (Oil Natural Air Natural)
Vector Group
Dyn11 (standard) / others on request
Key Features
- High efficiency with low no-load and load losses
- Superior insulation system for enhanced life
- Excellent heat dissipation design
- Robust tank construction with corrosion-resistant coating
- Low noise and vibration levels
- Suitable for indoor and outdoor installations
- Energy-efficient designs as per BIS / BEE standards
Construction Details
- CRGO silicon steel core for reduced losses
- Electrolytic grade copper / aluminium windings
- High-quality transformer oil for insulation and cooling
- Conservator with oil level indicator
- Buchholz relay (for higher ratings)
- Off-circuit tap changer for voltage adjustment
Applications
- Residential and rural electrification
- Industrial power distribution
- Commercial complexes
- Solar and renewable energy projects
- Utility substations
Testing & Standards
- IS 1180 (Latest) compliant
- Routine Tests
- Type Tests (on request)
- Special Tests as per customer requirement
Power Transformers
Power transformers are critical components in electrical transmission and distribution systems, designed to transfer large amounts of electrical energy efficiently across voltage levels. At Sanelectro Switchgear, we manufacture robust Power Transformers up to 10 MVA for utility, industrial, and infrastructure applications.
Product Range & Ratings
Capacity Range
- 1 MVA, 2 MVA, 2.5 MVA, 3.15 MVA, 5 MVA
Voltage Class
- Primary Voltage (HT): Up to 33 kV / 66 kV
- Secondary Voltage (LT/HT): 3.3 kV / 6.6 kV / 11 kV / 33 kV
Frequency
50 Hz
Cooling Type
- ONAN (Oil Natural Air Natural)
- ONAF (Oil Natural Air Forced) – for higher ratings
Vector Group
Dyn11 / YNd11 / YNyn0 / others on request
Key Features
- High efficiency with optimized core design
- Low no-load and load losses
- Excellent thermal stability and heat dissipation
- Strong mechanical strength to withstand fault conditions
- Low noise and vibration levels
- Designed for continuous and heavy-duty operation
- Compliance with IS / IEC standards
Construction Details
- CRGO silicon steel core for reduced core losses
- Copper / Aluminium windings with high insulation strength
- Oil-filled, hermetically sealed or conservator type
- Radiators / cooling tubes for effective heat dissipation
- Buchholz relay for protection
- Magnetic oil level gauge (MOG)
- Winding temperature indicator (WTI) & oil temperature indicator (OTI)
- Off-load / On-load tap changer (OLTC optional)
Applications
- Substations and power utilities
- Industrial plants (steel, cement, manufacturing)
- Infrastructure projects
- Renewable energy (solar / wind pooling stations)
- Large commercial complexes
Testing & Standards
- IS 2026 / IEC 60076 compliant
- Routine Tests (IR, ratio, vector group, losses, impedance)
- Type Tests (short circuit, temperature rise)
- Special Tests (on request)
Technical Specifications Summary
| Feature | Distribution | Power |
|---|---|---|
| Capacity | 100–315 kVA, up to 5 MVA | 1–5 MVA (up to 10 MVA range) |
| Primary Voltage | 11 / 22 / 33 kV | Up to 33 / 66 kV |
| Secondary / LT | 415 V / 433 V | 3.3 / 6.6 / 11 / 33 kV |
| Cooling | ONAN | ONAN / ONAF |
| Vector Group | Dyn11 (std.) | Dyn11 / YNd11 / YNyn0 |
Need a custom configuration?
We can design transformers to meet specific technical requirements, including non-standard voltages and project-specific conditions.