Oil Cooled Small Power Distribution Transformer

Zhejiang Jiangshan Hengli Electrical Co., Ltd. is one of the leading manufacturers and suppliers of oil cooled small power distribution transformer in China. If you're going to wholesale durable oil cooled small power distribution transformer made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.

If you run rural power grid upgrades, small workshop projects, agricultural irrigation sites or remote village power supply jobs, our oil cooled small power distribution transformers are the most practical, cost-effective choice you can find. As a direct manufacturer,we focus on designing and manufacturing power transformers for global buyers. We have been making these small oil immersed transformers for over 20 years, and we ship finished units to more than 20 countries, including Angola, Nigeria, Tanzania, Vietnam,Malaysia and so on.

Our small oil cooled transformers cover a full range of compact capacities from 10kVA, 50kVA, 75kVA, 100kVA up to 1000kVA. All our oil cooled small power distribution transformers work as step-down equipment, taking high medium voltage from grid lines and converting it into safe low voltage for daily use of lights, motors and farm machines.

Every oil cooled small power distribution transformer we build fits IEC60076 international standards, and we can adjust key parameters to match local grid rules in different countries. The standard primary voltage is 11kV, with NLTC no-load tap changer that supports ±2×2.5% tapping range, total 5 voltage adjustment gears. When local grid voltage rises or drops sharply during day and night peaks, field workers can cut power briefly and switch taps to lock steady 400V output. Impedance voltage is set at 4% for all units below 315kVA and 6% for capacities from 400kVA to 1000kVA, giving strong protection against sudden short circuit shocks on overhead power lines.

What makes our oil cooling design stand out from cheap alternatives? The insulating mineral oil inside flows freely around the copper windings and silicon steel core. It absorbs heat generated during power transfer and dissipates heat through the corrugated metal tank wall. We use ONAN natural oil-air cooling as the standard setup for all small models. No extra cooling fans are needed, which cuts down extra parts that can break, lowers running noise, and keeps long-term maintenance work simple for remote sites with limited technical staff.We stick to pure high-conductivity copper for every winding inside our small oil transformers, and we never use cheap aluminum wire unless buyers specifically ask for a budget option.

Our Oil Cooled Small Power Distribution Transformers are widely used in:

• Rural Village Power Grid Renovation (Africa & Southeast Asia)
• Agricultural Irrigation & Farm Facilities
• Small Manufacturing Workshops & Mini Factories
• Remote Telecom & Off-Grid Base Stations
• Mini Solar PV Off-Grid Power Stations
• Residential Small Community Substations
• Highway and Road Light

Unlike trading companies that source goods from random workshops, we own our complete production plant in Jiangshan, Zhejiang. We control every single production step from raw material cutting, copper winding wrapping, core stacking, tank welding to final assembly. Our in-house QC team runs full acceptance testing for every transformer before loading to container, covering insulation resistance test, oil tightness leakage test, temperature rise test and tap switch durability inspection. We have kept a low after-sales failure rate record for all export orders over the past decade.

We support full custom service to fit your unique project demands. If you need 60Hz frequency for American clients, 0.415V secondary voltage for Australia, extra salt-fog anti-rust coating for coastal islands or extra lightning arrester brackets for wild mountain power lines, our technical team can adjust all specifications freely. We also provide full one-stop service: pre-sales technical drawing consultation, fast formal quotation, production progress updates, export packaging, English operation manuals and long-distance after-sales guidance for installation and daily maintenance.

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