Zhejiang Jiangshan Hengli Electrical Co., Ltd. is one of the leading manufacturers and suppliers of liquid-filled polemount transformer in China. If you're going to wholesale durable liquid-filled polemount transformer made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.
A liquid-filled pole-mount transformer (also called oil-filled pole-mounted distribution transformer) is an outdoor distribution transformer designed to hang directly on utility poles for overhead power grids. Its core and windings sit inside a sealed steel tank fully submerged in dielectric liquid, mostly mineral transformer oil or eco-friendly ester fluid. The liquid delivers two core jobs: cooling hot windings and providing strong electrical insulation.
It steps down medium-voltage overhead line power to low-voltage usable power for end-users. Available in both single-phase and three-phase versions, this compact unit comes with mounting lugs, high-low-voltage bushings, surge arresters and over-current protection accessories. Elevated pole installation keeps it away from flood water, vehicle impact and accidental public touch. Anti-corrosion tank coatings support long-term outdoor service.
Core Advantages
- Cost-effective for existing overhead-line regions, no expensive underground civil work required
- Liquid cooling brings stable thermal performance for continuous outdoor operation
- Elevated mounting improves flood resistance for low-lying sites
Typical Applications It serves rural villages, remote farms, irrigation facilities, small-scale mining sites and scattered suburban communities. For cold-climate zones like Xinjiang and Central Asia, select low-pour-point liquid such as-45# transformer oil to guarantee smooth winter startup.It differs from pad-mount transformers, which sit on ground concrete pads and connect with underground cables.
How Does a Liquid-Filled Pole-Mount Transformer Differ from Other Types of Transformers
A liquid-filled pole-mount transformer stands apart mainly by its overhead pole-hanging installation, liquid cooling structure and target application scenarios, when compared with other common transformer models.
Versus pad-mount liquid-filled transformers
Pole-mount units hang on utility poles for overhead power lines, requiring no concrete ground foundation. Pad-mount transformers sit on concrete pads and work with underground cables. Pole-mount models are more compact and lower-cost for scattered rural loads, while pad-mount units offer better vandal-proof performance for residential subdivisions.
Versus dry-type transformers
Liquid-filled pole-mount units rely on dielectric oil for cooling and insulation for outdoor overhead networks. Dry-type transformers use air cooling without oil; they are fire-safe and designed for indoor, densely-populated locations such as hospitals and data centers, and are not made for pole-mount overhead deployment.
Versus large oil-immersed substation transformers
Pole-mount transformers are small-to-medium distribution units for end-user power supply. Large substation transformers have much higher capacity for grid transmission inside dedicated substations, with heavy radiators and complex auxiliary systems.
Customization Options
As a direct manufacturer, we provide fully customized transformer solutions to meet your project requirements:
- Custom voltage ratios (HV/LV)
- Special core and winding designs
- Copper or aluminum windings
- Compact or lightweight designs
- Special cooling systems
Our engineering team will deliver a tailored design within 72 hours based on your specifications.
How to Get a Transformer Quotation
Please provide the following parameters so we can prepare an accurate quotation for you. You may attach your SLD or specification sheet if available.
Quantity,Destination & Application scenario
Power Rating (Rated Capacity)
You can provide either load capacity in KW or the voltage transformer power in KVA.
Input & Output Voltage
Input voltage is the mains supply voltage, and output voltage is the voltage that load needs.
Frequency: 50Hz or 60Hz
Phases: Three or single
Insulation Class
Both F and H insulation class are available for choice, the default insulation level is F.
Vector Group
Please specify Dyn11 or Yyn0 vector group, Delta or Wye (star) connection.
Winding Material
Both Aluminum and Copper are available for choice.
We're a professional distribution transformer manufacturer and supplier in China, specialized in providing high quality customized products with competitive price. We warmly welcome you to wholesale transformers made in China here from our factory.
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