Pole Mounted Transformer

Key Features of Pole-Mounted Transformers

The transformers are mounted on utility poles to ensure efficient and reliable power delivery. Essential design highlights include:

Optimized core and coil design for lower total ownership cost (TOC)
Step-lap wound core for high efficiency and low noise
"Low-high-low" windings for improved short circuit and thermal strength
CAD-designed for accurate mechanical and electrical calculations
Dual-voltage design meeting BIL and short-circuit requirements
Clear low-voltage lead markings for easy identification
Durable paint system exceeding IEEE C57.12.28 standards
Lifting lugs designed to prevent slippage
Multiple cover clamps for tight sealing and water prevention
Provision for surge arrester bracket (optional)
Automatic self-resealing pressure relief valve

CHBEB Overhead Transformer Series

Discover single-phase and three-phase pole-mounted transformers for applications ranging from residential distribution to heavy-load utility networks.

300 KVA Pole-Mounted Transformer
• Coil Material: Copper/Aluminum
• Primary Voltage: 10-35kv
• Working Efficiency: 50HZ/60HZ
• Pole mounted distribution transformer
• Single-Phase /three-Phase
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250 KVA Pole-Mounted Transformer
• Coil Material: Copper/Aluminum
• Primary Voltage: 10-35kv
• Working Efficiency: 50HZ/60HZ
• Pole mounted distribution transformer
• Single-Phase /three-Phase
view more
100 KVA Pole-Mounted Transformer
• Coil Material: Copper/Aluminum
• Primary Voltage: 10-35kv
• Working Efficiency: 50HZ/60HZ
• Pole mounted distribution transformer
• Single-Phase /three-Phase
view more
75 KVA Pole-Mounted Transformer
• Coil Material: Copper/Aluminum
• Primary Voltage: 10-35kv
• Working Efficiency: 50HZ/60HZ
• Pole mounted distribution transformer
• Single-Phase /three-Phase
view more
50 KVA Pole-Mounted Transformer
• Coil Material: Copper/Aluminum
• Primary Voltage: 10-35kv
• Working Efficiency: 50HZ/60HZ
• Pole mounted distribution transformer
• Single-Phase /three-Phase
view more
37.5 KVA Pole-Mounted Transformer
• Coil Material: Copper/Aluminum
• Primary Voltage: 10-35kv
• Working Efficiency: 50HZ/60HZ
• Pole mounted distribution transformer
• Single-Phase /three-Phase
view more
25 KVA Pole-Mounted Transformer
• Coil Material: Copper/Aluminum
• Primary Voltage: 10-35kv
• Working Efficiency: 50HZ/60HZ
• Pole mounted distribution transformer
• Single-Phase /three-Phase
view more
15 KVA Pole-Mounted Transformer
• Coil Material: Copper/Aluminum
• Primary Voltage: 10-35kv
• Working Efficiency: 50HZ/60HZ
• Pole mounted distribution transformer
• Single-Phase /three-Phase
view more

Technical Specifications

The following specifications cover our standard range of distribution transformers.

Item	Specification
Rated Capacity	15–333 kVA
Primary Voltage	10 / 11 / 20 / 33 / 35 kV
Secondary Voltage	0.4 kV
Frequency	50/60 Hz
Phase	Single-phase / Three-phase
Cooling Type	ONAN (Oil Natural Air Natural)
Insulation Level	24 kV class: 50 kV AC / 125 kV BIL 35 kV class: 70 kV AC / 170 kV BIL
Connection Type	Dyn11, Yyn0 (others on request)
Impedance Voltage	15 kVA: 4.0% 100 kVA: 4.5% 250–333 kVA: 6.0%
Protection Grade	IP54 (higher on request)
Insulation Class	Class A (Oil-immersed)
Standard Compliance	IEC 60076, IEEE C57.12, CE, ISO 9001/14001
Application	Single-phase: Light-load rural / residential areas Three-phase: Industrial / Utility / Commercial

Pole Transformers Designed for Your Project

We offer flexible options for our pole-mounted transformers to suit your specific requirements.

Protection & Enclosure
Upgrade to higher IP ratings, enhanced anti-corrosion coating, lightning and water protection.
Load Switch & Protection Devices
Optional circuit breakers, fuses, load switches, and advanced overload protection.
Monitoring & Measurement
Temperature sensors, voltage/current meters, and remote monitoring interfaces.
Capacity & Dimensions
Custom-rated capacity, special mounting dimensions, and unique wiring configurations.

TELL YOUR NEEDS

Quality and Reliability
Assurance

Before delivery, we conduct a comprehensive series of tests to ensure the safety, reliability, and performance of our pole-mounted transformers.

Standard procedures include winding resistance measurement, turns ratio verification, no-load loss and excitation current testing, load loss and impedance checks, applied and induced voltage testing,insulation leakage assessment, and polarity and phase verification.

In addition, optional tests such as temperature rise, noise level, and full-wave impulse testing are available to meet specific project requirements.

How We Support Your Transformer Business Success

Global Supply

Reliable production capacity and streamlined logistics ensure timely delivery for all projects.
Competitive Pricing

Optimized manufacturing and lifecycle cost management provide excellent value for your investment.
On-Time Delivery

Impact-indicator labels and GPS tracking, alongside international shipping and customizable delivery solutions.
After-Sales Support

Professional guidance, remote support, and fast spare parts availability for smooth operations.

FAQ

Q: How does an overhead transformer work?

A: It steps down high voltage from distribution lines to a usable level for homes or businesses. Mounted on poles, it uses a magnetic core and windings to convert electricity efficiently and safely for local power networks.
Q: What are the main components of a distribution transformer?

A: It mainly includes a magnetic core, primary and secondary windings, an oil or dry-type tank, bushings, and protective devices like fuses or lightning arresters. These parts ensure safe and reliable power conversion outdoors.
Q: What types of pole mounted transformers are there (single-phase, three-phase)?

A: There are single-phase and three-phase pole mounted transformers. Single-phase units are typically used in rural or light-load networks, while three-phase models are ideal for industrial and commercial systems that require higher capacity and stable performance.
Q: Are overhead distribution transformers suitable for urban areas?

A: Yes. Compact and low-noise pole mounted transformers are suitable for urban and suburban power networks. They offer easy installation, reliable operation, and full compliance with city safety and environmental standards.
Q: Can you provide references or case studies of past pole-mounted transformer projects?

A: Yes, we have many projects in both urban and rural distribution networks. See our case studies to learn how we ensure reliable, efficient, and safe outdoor power distribution.
Q: What is your Minimum Order Quantity (MOQ)?

A: The MOQ for our pole-mounted transformers is 10 units per model. For large-scale or custom projects, the MOQ can be negotiated based on order quantity and specifications.
Q: What is your typical lead time for delivery?

A: Our standard overhead transformers are delivered within 30 days after order confirmation. Lead time for custom transformers varies based on voltage, capacity, and order quantity.
Q: What is your warranty policy?

A: We offer a 3-year full equipment warranty, including free lifecycle maintenance guidance. Additionally, a 2-year quality guarantee ensures reliable performance under normal outdoor operating conditions.

We are one of the most experienced pole mounted transformer manufacturers and suppliers in China since 1956, specialized in providing high quality products and service for global clients. We warmly welcome you to wholesale custom made pole mounted transformer from our factory.

Powering the World with Premium Transformer Solutions

As a leading Chinese transformer manufacturer with decades of expertise, CHBEB proudly serves clients across 17 countries and counting. Our global footprint expands continuously as we:

Deliver customized power solutions for more than 10 international projects
Support over 20 trusted distributors worldwide
Manufacture reliable low-voltage transformers with 60+ years of technical excellence

Let's energize your next power project with Chinese precision and global reliability.

Get in Touch with CHBEB

Leave a message for more information about our products series, and request a quote or expert advice.