Capacity: upto 2500 KVA of voltage class up to 33kv
Makpower is a trusted BIS-marked Distribution Transformer manufacturer, offering energy-efficient and reliable solutions certified by CPRI and ERDA. Built as per IS:1180 standards, these transformers are designed for optimum power distribution in utilities and commercial sectors. With both copper and aluminium wound options, Makpower ensures strict compliance with mandated loss levels.
Range: Makpower manufactures BIS-certified Distribution Transformers with capacities up to 2500 KVA, in voltage class up to 33 kV. These transformers are designed to serve various rural, urban, and industrial power networks, offering durability, energy efficiency, and long-term service under all load conditions.
> Standards: Designed as per IS:1180 (Part-1)/2014
> Winding Options: Available with copper or aluminium windings
> Cooling Type: ONAN type for efficient heat dissipation
> Loss Levels: Meets Star 1, 2, and 3 efficiency levels per BIS
> Impedance: In accordance with IS tolerance ranges
> Vector Group: Dyn11 standard for distribution networks
> Tapping Range: ±5% off-circuit tap changer for voltage regulation
Makpower’s BIS Distribution Transformers are available in multiple types to meet different utility specifications and grid standards:
> Pole-Mounted Transformers: Compact units used in rural or sub-urban areas, easy to install and maintain.
> Plinth-Mounted Transformers: Widely used in urban networks for reliable and tamper-proof operation.
> Pad-Mounted Units: Enclosed transformers for underground power distribution networks in urban areas.
> Customized Designs: Transformers with enhanced features like surge arresters, bird guards, or LV breakers for specific site needs.
> Energy Efficient: Complies with BIS star-rating norms for reduced operational losses
> Durable Construction: Built with high-grade CRGO or amorphous core materials
> High Reliability: Proven insulation and oil sealing ensure long-lasting performance
> Compact Design: Engineered for space-saving installations in dense areas
> Eco-Friendly: Uses non-PCB insulating oil and supports environmental standards
> Utilities: Power distribution to residential and commercial load centers
> Industrial Estates: Reliable energy supply for low-tension industrial applications
> Renewable Energy: Used in solar and wind power systems for grid connectivity
> Infrastructure Projects: Integral part of smart grids and urban electrification
> Government Schemes: Supplies transformers under DDUGJY, IPDS, and similar rural electrification programs
> Testing & Certification: Approved by CPRI and ERDA for BIS compliance
> Quality Assurance: Each transformer undergoes full routine and type testing
> BIS Star Ratings: Available in Star 1, Star 2, and Star 3 loss level variants
> Core Materials: Uses high-permeability CRGO or amorphous metal cores for minimal losses
> Pre-Sales Consultation: Technical experts guide transformer selection per load requirements
> Custom Engineering: Solutions tailored to site-specific voltage and load variations
> After-Sales Support: AMC, oil testing, and maintenance services across India
> Spare Availability: Readily available accessories and replacement parts for long-term use
| S.N. | Rating (KVA) | Voltage Ratio (kv) | %Z at 750C (Tol as per is 2026) | Level 1 | Level 2 | Level 3 | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Max. Total Loss at 50% Load | Max. Total Loss at 100% Load | Max. Total Loss at 50% Load | Max. Total Loss at 100% Load | Max. Total Loss at 50% Load | Max. Total Loss at 100% Load | |||||
| 1 | 16 | 11/0.433 | 3 | 4.50% | 150 | 480 | 135 | 440 | 120 | 400 |
| 2 | 25 | 11/0.433 | 3 | 4.50% | 210 | 695 | 190 | 635 | 175 | 595 |
| 3 | 63 | 11/0.433 | 3 | 4.50% | 380 | 1250 | 340 | 1140 | 300 | 1050 |
| 4 | 100 | 11/0.433 | 3 | 4.50% | 520 | 1800 | 475 | 1650 | 435 | 1500 |
| 5 | 160 | 11/0.433 | 3 | 4.50% | 520 | 1800 | 475 | 1650 | 435 | 1500 |
| 6 | 200 | 11/0.433 | 3 | 4.50% | 890 | 2700 | 780 | 2300 | 670 | 2100 |
| 7 | 250 | 11/0.433 | 3 | 4.50% | 1050 | 3150 | 980 | 2930 | 920 | 2700 |
| 8 | 315 | 11/0.433 | 3 | 4.50% | 1100 | 3275 | 1025 | 3100 | 955 | 2750 |
| 9 | 400 | 11/0.433 | 3 | 4.50% | 1300 | 3875 | 1225 | 3450 | 1150 | 3330 |
| 10 | 500 | 11/0.433 | 3 | 4.50% | 1600 | 4750 | 1510 | 4300 | 1430 | 4100 |
| 11 | 630 | 11/0.433 | 3 | 4.50% | 2000 | 5855 | 1860 | 5300 | 1745 | 4850 |
| 12 | 1000 | 11/0.433 | 3 | 5.00% | 3000 | 9000 | 2790 | 7700 | 2620 | 7000 |
| 13 | 1250 | 11/0.433 | 3 | 5.00% | 3600 | 10750 | 3300 | 9200 | 3220 | 8400 |
| 14 | 1600 | 11/0.433 | 3 | 6.25% | 4500 | 13500 | 4200 | 11800 | 3970 | 11300 |
| 15 | 2000 | 11/0.433 | 3 | 6.25% | 5400 | 17000 | 5050 | 15000 | 4790 | 14100 |
| 16 | 2500 | 11/0.433 | 3 | 6.25% | 6500 | 20000 | 6150 | 18500 | 5900 | 17500 |
| 17 | 315 | 33/0.433 | 3 | 4.50% | 1183 | 3521 | 1102 | 3333 | 1027 | 2956 |
| 18 | 400 | 33/0.433 | 3 | 4.50% | 1398 | 4166 | 1317 | 3709 | 1236 | 3580 |
| 19 | 500 | 33/0.433 | 3 | 4.50% | 1720 | 5106 | 1623 | 4623 | 1537 | 4408 |
| 20 | 630 | 33/0.433 | 3 | 4.50% | 2150 | 6294 | 2000 | 5698 | 1876 | 7525 |
| 21 | 1000 | 33/0.433 | 3 | 5.00% | 3225 | 9675 | 2999 | 8278 | 2817 | 7525 |
| 22 | 1250 | 33/0.433 | 3 | 5.00% | 3870 | 11556 | 3548 | 9890 | 3462 | 9030 |
| 23 | 1600 | 33/0.433 | 3 | 6.25% | 4838 | 14513 | 4515 | 12685 | 4268 | 12148 |
| 24 | 2000 | 33/0.433 | 3 | 6.25% | 5805 | 18275 | 5429 | 16125 | 5149 | 15158 |
| 25 | 2500 | 33/0.433 | 3 | 6.25% | 6988 | 21500 | 6611 | 19888 | 6343 | 18813 |
A BIS distribution transformer is a low-loss transformer certified by the Bureau of Indian Standards under IS:1180 norms. It is used to step down voltage from 11/33 kV to consumer-usable levels like 440V or 230V.
BIS has defined maximum loss levels for transformers in Star 1, 2, and 3 categories. Makpower’s transformers are manufactured not to exceed these prescribed loss values, ensuring energy efficiency and cost savings.
Makpower offers both copper wound and aluminium wound transformers. Copper provides better conductivity, while aluminium is more cost-effective with lighter weight.
