A single-phase pole-mounted transformer is a distribution-type electrical device used to step down high distribution voltages to lower utilization levels, most commonly for residential and light commercial use. These units are typically oil-filled and mounted high on utility poles to save ground space and maintain public safety by keeping live parts out of reach
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Core Components
Magnetic Core: Made of laminated silicon steel to provide a low-resistance path for magnetic flux.
Windings: Copper or aluminum coils that transfer energy via electromagnetic induction.
Tank: A sealed, corrosion-resistant steel enclosure (often finished in ANSI 70 gray) that houses the core, windings, and oil.
Bushings: Porcelain or polymer insulators that connect internal windings to external overhead lines.
Useful Life: With regular maintenance (checking oil levels and bushing condition), these units typically last 25 to 40 years.
Capacity Ratings: From 5 kVA to 500 kVA.
Primary voltages: up to 34.5 kV,
Secondary voltages of 120V/240V 240V/480V or 277V.
Insulation & Cooling: Mineral oil (mineral oil or FR3 fluid) with ONAN (Oil Natural Air Natural) cooling.
Basic Impulse Level (BIL): 30–150 kV.
Core Material: Grain-oriented electrical steel or amorphous steel for high energy efficiency.
Impedance: Typically .
Tap Changer: Typically or 5-position taps
, , or .
We are a leading manufacturer specializing in medium-voltage electrical solutions, with a strong focus on reliability, innovation, and quality. Based in Foshan, Guangdong, we operate across three manufacturing facilities with a total area of 120,000 square meters. We are equipped to deliver a comprehensive range of products up to 35kV, including distribution transformers, switchgear, and compact substations, with a maximum capacity of up to 10,000kVA.
Our dedicated team of 600 employees works tirelessly to ensure excellence in every product we design and produce. We take pride in our internationally recognized credentials, holding certifications from KEMA and UDEM, while our UL certification has successfully passed prototype testing—a testament to our commitment to global standards and performance reliability.
Driven by a mission to deliver safe and efficient power distribution solutions, we continue to invest in technology, process improvement, and customer satisfaction, serving clients worldwide with tailored electrical systems built to last.
Zhongpeng has established a scientific management system and advanced design and Manufacturing systems,enabling precise control over every processing point and ensuring reliable fulfillment of customer requirements.
Through the development of a digital smart factory centered on ERP,MES,CRM and SRM systems,Zhongpeng has achieved integrated management of material flow, capital flow, and information flow,with a focused commitment to digital transformation.
- 1.We have extensive experience in power grid supply.
- 2.We have Fully automatic intelligent digital production line.
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- 1.KEMA Test Report for Oil immersed Transformer and dry type transformer.
- 2.CNAS Test Report for Oil immersed Transformer and dry type transformer.
- 3.UDEM Test Report for dry type transformer.
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We are a professional manufacturer with 15 years of experience in power equipment, specializing in Transformers and Amorphous Alloy Cores, High and Low Voltage Switchgear, Substations.
We take pride in being a qualified and reliable supplier for the State Grid Corporation of China
Q2. Do you accept customized service?
Indeed, we offer professional OEM and ODM services, and welcome custom logo branding on our products. Our experienced technical and quotation teams are fully prepared to deliver customized solutions for transformers and other power equipment, precisely in accordance with your drawings and specifications.
Q3. What is your Minimum Order Quantity (MOQ)?
Our flexible MOQ is just 1 piece.
Q4. How long is your delivery lead time?
The delivery lead time is upon your product requirements and order quantity. Typically, from the date of advance payment receipt to the port of delivery (FOB), within 30 to 60 days.
Q5. How do you resolve quality issues?
Kindly provide detailed photos of the quality issues. Our adept technical and quality testing team will conduct an analysis and offer a satisfactory solution within 2 days.
Q6. What are your payment terms?
A6. We require a 30% T/T in advance and the balance 70% before shipment. We also accept Western Union and L/C.
Q7. How do you provide technical support if the product malfunctions?
We offer comprehensive after-sales support:
Remote Guidance: Technical assistance via phone, email, or video conferencing.
On-site Service: Engineers can be dispatched to resolve issues at your location if required (additional fees apply).
Spare Parts Support: We guarantee long-term, stable supply of spare parts.
