Distribution Transformer
Sinotech Electric supplies distribution transformers designed for utility companies, EPC contractors, and electrical distributors who need reliable, cost-effective power distribution solutions. Covering voltage classes from 10kV to 35kV with capacities ranging from 50kVA to 2,500kVA, our distribution transformers serve residential neighborhoods, commercial districts, industrial zones, and rural electrification projects across 80+ countries worldwide.
Sinotech distribution transformers are available in multiple mounting configurations:
Pole-mounted (50kVA–500kVA) — overhead installation for rural and semi-urban networks
Pad-mounted (100kVA–2,500kVA) — ground-level installation with tamper-resistant enclosures
Ground-mounted / Substation type (315kVA–2,500kVA) — for dedicated substation rooms
Custom Distribution Transformer Manufacturer in China
Sinotech offers distribution transformers in both oil-immersed and dry type configurations to match different installation requirements. Oil-immersed models are available in S11, S13, and S20 energy-efficient series, ideal for outdoor pole-mounted, pad-mounted, and ground-mounted installations. Dry type models feature epoxy resin cast coils with Class F or Class H insulation, suited for indoor substations, commercial buildings, and fire-sensitive environments.
Max. Voltage
35kV
Capacity
50kVA to 2,500kVA
Standards
ANSI/IEEE/DOE/CSA/AS
What Are the Standard Size of Sinotech Distribution Transformer?
| Transformer Capacity (kVA) | High Voltage (kV) | High Voltage Tap Range (%) | Low Voltage (kV) | Rated Frequency (Hz) | Connection Group Model Number | No-load Loss (W) | Load Loss (W) | No-load Current (%) | Noise Level (dB) | Short Circuit Impedance (%) | Gauge A×B (mm×mm) | Dimensions Length×Width×Height (m) | Weight (kg) |
| 30 | 6 6.3 6.6 10 10.5 11 | 52× 2.5 | 0.4 | 50 | D,yn11 Y,yn0 | 80 | 630/600 | 0.5 | 43 | 4.0 | 400×400 | 830x650x950 | 380 |
| 50 | 100 | 910/870 | 0.5 | 43 | 400×400 | 850×680×960 | 420 | ||||||
| 80 | 130 | 1310/1250 | 0.45 | 44 | 400×400 | 870×700×1010 | 520 | ||||||
| 100 | 150 | 1580/1500 | 0.45 | 44 | 400×400 | 900×720×1020 | 580 | ||||||
| 160 | 200 | 2310/2200 | 0.4 | 46 | 550×550 | 1190×770×1090 | 790 | ||||||
| 200 | 240 | 2730/2600 | 0.4 | 47 | 550×550 | 1260×850×1120 | 880 | ||||||
| 250 | 290 | 3200/3050 | 0.35 | 48 | 550×550 | 1300×860×1140 | 1020 | ||||||
| 315 | 340 | 3830/3650 | 0.35 | 48 | 660×660 | 1370×910×1160 | 1220 | ||||||
| 400 | 410 | 4520/4300 | 0.35 | 48 | 660×660 | 1400×920×1220 | 1430 | ||||||
| 500 | 480 | 5410/5150 | 0.3 | 49 | 660×660 | 1530×1000×1280 | 1730 | ||||||
| 630 | 570 | 6200 | 0.25 | 49 | 4.5 | 660×660 | 1610x1060x1320 | 2100 | |||||
| 800 | 700 | 7500 | 0.18 | 50 | 660×820 | 1670x1120x1380 | 2480 | ||||||
| 1000 | 830 | 10300 | 0.17 | 50 | 660×820 | 1720×1160×1400 | 2880 | ||||||
| 1250 | 970 | 12000 | 0.17 | 52 | 660×820 | 1770×1180×1500 | 3500 | ||||||
| 1600 | 1170 | 14500 | 0.16 | 52 | 820×1070 | 1860x1240x1600 | 4130 | ||||||
| 2000 | 1360 | 18300 | 0.16 | 54 | 5.0 | 820×1070 | 1950x1320x1720 | 5420 | |||||
| 2500 | 1600 | 21200 | 0.15 | 54 | 820×1070 | 2070x1400x1800 | 6500 |
Note: Above Is Technical Parameters of 10kV Class S13 Series Energy-saving Distribution Transformer
Custom Distribution Transformer Solutions
Every Sinotech distribution transformer is built with premium components: grain-oriented silicon steel cores for reduced no-load losses, oxygen-free copper or aluminum windings for superior conductivity, and high-grade mineral oil or FR3 natural ester for oil-immersed units. Standard secondary output is 0.4kV, with custom voltage ratios and tap configurations available for specific grid requirements. Impedance values follow IEC 60076 standards with custom options from 4% to 6%.
Sinotech custom distribution transformers have been deployed in rural electrification networks in West Africa with unstable grid voltage and extreme humidity, mining substations in the Andes at 3,800 meters altitude with daily temperature swings of 40°C, residential estates in Southeast Asia where noise complaints shut down lesser transformers, and coastal industrial zones in the Middle East where salt corrosion destroys standard tank coatings within two years.
Our Global Projects
Distribution Transformer in Tanzania
Distribution Transformer in Peru
Distribution Transformer in Kuwait
Distribution Transformer to Indonesia
Distribution Transformers to Bosnia and Herzegovina
Distribution Transformers to Malaysia
Distribution Transformer Application
Distribution transformers are the final voltage step between the high-voltage transmission network and the low-voltage systems that power our daily lives. They are installed everywhere, largely invisible, and absolutely critical. Whatever your application, Sinotech builds distribution transformers for real conditions — the ones your site actually has. Send us your project details and we’ll recommend the right configuration.
Urban Power Distribution
Rural Electrification
Renewable Energy
High Quality, Reliable, and Long lasting Distribution Transformer
Sinotech builds each distribution transformers with reinforced insulation for voltage fluctuation tolerance, robust tank construction for extended maintenance intervals. Windings are oxygen-free copper with purity above 99.9%. Insulation is premium-grade Nomex and epoxy resin with verified thermal class. We customize distribution transformers for most conditions — not with generic recommendations, but with engineering analysis and proven solutions.
30+ Years of Industry Expertise
With over 30 years of combined experience in power electrical engineering, Sinotech brings unmatched technical depth to every project. Our team understands the complexities of different voltage levels, load profiles, and environmental conditions.
Large Manufacturing Capability
Sinotech operates a world-class manufacturing base capable of handling both small custom orders and large-volume utility projects. Our scale ensures consistent quality, competitive pricing, and reliable delivery for clients worldwide.
Comprehensive Product Portfolio
Sinotech offers a complete range of power transformation products, eliminating the need for multiple suppliers. From distribution transformers to prefabricated substations, we cover your entire power infrastructure requirements.
Full Customization Capability
Sinotech engineers custom transformer solutions for high-altitude zones, extreme temperatures, corrosive atmospheres, and renewable energy applications with documented project success.
IEC, ANSI, and CE Certified Quality
Every Sinotech transformer meets stringent international standards. We provide full test reports and certification documentation with each shipment, ensuring regulatory compliance in your target market.
Rigorous Quality Control Process
Quality is built into every step of our manufacturing process. From silicon steel core selection to vacuum oil filling, Sinotech maintains strict controls to guarantee performance, safety, and long service life.
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OEM Distribution Transformer Supplier
Our production lines support both standard power transformer models and fully custom designs, with annual capacity exceeding 15,000 transformer units. We have successfully executed OEM orders for clients in Southeast Asia, the Middle East, Africa, Latin America and more.
Our production lines support both standard power transformer models and fully custom designs, with annual capacity exceeding 15,000 transformer units. We have successfully executed OEM orders for clients in Southeast Asia, the Middle East, Africa, Latin America and more.
Sinotech welcomes inquiries from distributors, brand owners, and EPC contractors seeking a reliable power transformer manufacturer.
Urban Residential Network — Philippines
“Manila’s load profile is brutal — peak demand swings of 60% between afternoon and midnight. The Sinotech S13 units we installed in two residential substations have maintained stable output voltage throughout, and the no-load loss figures match exactly what was quoted.”
Global Clients
