Power Transformer

Your Professional Power Transformer Supplier

Baoding Tianwei Baogian Power Equipment Co., Ltd. is a professional manufacturer and solution provider for intelligent power equipment. We focus on high-voltage transformers, switchgear, box-type substations, and intelligent monitoring and fault early warning systems. Our products are widely used in power transmission and distribution networks, industrial manufacturing, commercial infrastructure, and renewable energy projects. With certified quality systems and strong engineering capability, we deliver safe, reliable, and cost-effective solutions to domestic and international customers.

Comprehensive Power Equipment Capability
We offer a complete range of transformers, switchgear, substations, and intelligent monitoring systems covering 0.4kV–220kV and up to 100,000kVA, supporting power grids, industry, infrastructure, and renewable energy projects.

Certified Quality
Our operations follow ISO9001, ISO14001, and ISO45001 systems. Full in-house production and testing equipment ensure stable performance, safety, and consistent compliance with international standards.

Custom Solutions
An experienced engineering team, supported by long-term cooperation with leading universities, provides project analysis, customized designs, and reliable solutions for complex and high-demand applications.

Full Lifecycle Service Support
From technical consultation and system design to installation guidance, maintenance, and upgrades, we deliver long-term support to ensure reliable operation and lower total ownership cost.

SH21 Amorphous Alloy Transformer
Low No-Load Loss
Amorphous Alloy Material
Superior Magnetic Properties
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35kv Power Transformer
Low Loss, High Energy Efficiency
Low-Noise Operation
Leak-Proof and Short-Circuit Resistant
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Large Electrical Transformers
Large electrical transformers cover voltage classes from 0.4 to 110 kV.
Available capacities range from 30 to 240,000 kVA.
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20 Kva Dry Type Transformer
A 20 kVA dry type transformer has a rated capacity of 20 kVA.
It is designed for localized distribution and equipment circuits.
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10 Kva Dry Type Transformer
A 10 kVA dry type transformer provides a rated capacity of 10 kVA.
Its solid-insulation structure supports oil-free voltage conversion.
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6 Kva Dry Type Transformer
A 6 kVA dry type transformer has a rated capacity of 6 kVA.
Its oil-free structure is suitable for small electrical loads.
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Substation Power Transformer
Voltage level: 10 kV to 35 kV. Capacity: 30 kVA to 40,000 kVA by model. The substation power transformer is used in substations, plant power rooms, and distribution points.
Main choices...
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Large Power Transformers
Voltage range: 0.4 kV to 110 kV. Capacity: 30 kVA to 240,000 kVA by oil immersed series. large power transformers are used in substations, power plants, solar projects, and heavy industrial supply...
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3 Phase Power Transformer
Specifications: Covers 0.4kV-110kV voltage levels and 30kVA-100000kVA capacity range, available in oil-immersed and amorphous alloy versions to meet diverse power needs.
Features: Complies...
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110kv Power Transformer
Our 110KV Power Transformer represents the pinnacle of energy efficiency and environmental sustainability in high-voltage power transmission and distribution. Relying on Baoding Tianwei's mature...
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Amorphous Alloy Transformer
This product is of the oil-filled sealed type and operates on the same principle as sealed power transformers. The base elements of amorphous alloy include iron, nickel, cobalt, silicon, boron,...
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SH15 Amorphous Alloy Transformer
Amorphous Alloy Core
Low No-Load Loss
Stable Operation
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Parameter

Operating Frequency	1 kHz - 500 kHz (Customizable)
Rated Voltage	Up to 150 kV (Customizable)
Insulation Class	Class F, Class H, or Higher
Core Material	Ferrite, Amorphous, Nanocrystalline, etc.
Cooling Method	AN (Air Natural), AF (Air Forced), Oil Cooling
Key Technologies	Low Partial Discharge, Low Eddy Current Loss, Optimized Insulation Structure

Types of Power Transformer

The power transformers produced by our company mainly include the following types:

Low Power Voltage Transformer

This product is specifically engineered for low-power, high-precision voltage conversion requirements. Utilizing premium materials and advanced structural design, it ensures stable and efficient voltage transformation in various precision equipment and electronic systems.

Medium Power Transformer

This Medium Power Transformer adopts a modular design and intelligent manufacturing processes, covering a capacity range from 315kVA to 2500kVA.

High Voltage High Frequency Transformer

It operates stably and efficiently within frequency ranges from kHz to several hundred kHz, with voltage capabilities spanning from several kilovolts to hundreds of kilovolts.

Advantages of Power Transformer

Excellent Voltage Management

Power transformers maintain a consistent voltage level, without fluctuations in demand or supply conditions. So your sensitive electronic equipment allows the smooth operation of industrial processes without power surge or deviated electricity.

Effective Electricity Distribution

The power transformers efficiently transmit electrical power over long distances. They can effectively increase or reduce the current in transmission lines. They help you minimize energy losses during distribution and produce a high percentage of power that reaches you.

Enhanced Safety

Power transformers are designed with safety features that protect your electrical system from faults and overloads. They isolate different sections of the power network and prevent the spread of electrical disturbances. So they minimize the risk of damage and enhance your overall systems’ functionality and reliability.

Multiply Profit

These transformers contribute to significant cost savings in your operations. They minimize energy losses and utilize the unused power. It means you are liable to pay lower generation costs and minimize the need for additional infrastructure.

Freedom Of Utility

Power transformers are available in various sizes and configurations. So you can use them for your wide range of applications such as running industrial plants, substations, and manufacturing equipment as well as residential services. Their customization enables them to meet diverse energy demands.

Ecological Benefits

These transformers are designed with modern technology. Their advanced materials and innovative designs reduce energy losses and utilize renewable energy as well. These features help you minimize the environmental impact of power transmission and enable you to develop an independent and sustainable energy infrastructure.

Applications of Power Transformer

Substations

Transformers in substations play a key role in high-voltage transmission. Here, step-up transformers elevate distribution voltages for efficient long-distance power transmission through transmission lines. On the other hand, step-down transformers lower transmission voltages for distribution to towns and cities through distribution lines.

Power Plants

Within thermal and hydroelectric power plants, generators produce electricity at a voltage suitable for efficient generation, which may differ from transmission standards. Hence, station service transformers adjust the voltages to the required transmission levels before sending them out through transmission lines.

High Voltage High Frequency Transformer factory

Copper Mines

Because of the fire and explosion risks underground, copper mines require specially designed isolated transformers. These transformers have enclosures surrounding the coil assemblies to prevent arcing from causing ignitions in hazardous mine atmospheres.

Residential Distribution

Pole-mount transformers located on utility poles along streets help reduce distribution voltages even further for safe usage levels in homes. Pad-mount transformers installed above ground at housing complexes perform a similar voltage conversion function for supplying various residential loads.

High Voltage High Frequency Transformer best

Installation Steps For Power Transformers

High Voltage High Frequency Transformer suppliers

Transporting and Positioning the Transformer
Use heavy-duty cranes and rigging to carefully unload and position the transformer onto its foundation. Ensure that the transformer is level and stable on its pad to prevent mechanical stress.

Grounding the Transformer
Proper earthing (grounding) is essential to prevent electrical faults and ensure safety. Connect the transformer’s neutral and tank body to the grounding system using copper/aluminum conductors.

Installing Bushings and External Components
Mount high-voltage and low-voltage bushings properly to ensure electrical insulation. Connect radiators, conservators, and breathers if applicable (for oil-filled transformers). Install protective relays, current transformers (CTs), and voltage transformers (VTs) as needed.

Filling Transformer Oil (For Oil-Filled Transformers)
If the transformer is shipped without oil, fill it with filtered, moisture-free insulating oil up to the required level. Conduct dielectric strength tests to ensure the oil quality is within the acceptable range.

Pre-Commissioning Tests
Before energizing the transformer, various electrical tests must be conducted to confirm operational integrity. Conducted using a megger to check insulation quality between windings and ground. High-voltage test applied to check insulation endurance under normal operating conditions.

Standardized High-Voltage Ranges for Power Transformers

Voltage Rating (kV)	Classification	Typical Application
66 kV	Sub-transmission	Regional step-down for industrial or city zones
110 kV	Sub-transmission/Primary	Urban load centers, utility substations
132 kV	Transmission	Grid interconnection and regional substations
220 kV	High transmission	National inter-regional lines
400 kV	Ultra-high transmission	Backbone transmission for large-scale grids
500 kV	Extra high-voltage (EHV)	Long-distance HV corridors (common in the U.S.)
765 kV	UHV transmission	Bulk interstate or intercontinental networks

Customizable Options

Rated Capacity	10VA - 500VA
Input Voltage	220VAC / 110VAC
Output Voltage	12V / 24V / 36V, etc.
Cooling Method	ONAN / ONAF / AN / AF

Packaging and Shipping

Packaging	Wooden Crate, Steel Frame with Shrink Wrap
Shipping	Shipping by sea, by air, by express are acceptable. According to your requirements.

Our Factory

Baoding is located in the middle of the North China Plain, more than 30 kilometers away from Xiong'an New Area.

Our Certificates

Quality Management System certification GB/T19001-2016/IS09001:2015, Environmental Management System certification GB/T24001-2016/IS014001:2015, Occupational Health and Safety Management System certification GB/T45001-2020/IS045001:2018, Certified Quality Testing Accredited by CNAS

FAQ

Q: What is the difference between transformer and power transformer?

A: Power transformers are used in high voltage transmission networks, and distribution transformers are used in low voltage distribution networks.

Q: Is a power transformer AC or DC?

A: A transformer fundamentally works with Alternating Current (AC) because it relies on a constantly changing magnetic field to induce voltage, which AC provides; Direct Current (DC) creates a steady field that doesn't work, though some "AC-to-DC" adapters use a transformer followed by rectifiers to produce DC output for devices like phones. You can often tell if a device uses AC or DC by looking for the symbol on the label: a wavy "~" for AC or a straight line "—" for DC.

Q: What is a power transformer also known as?

A: A power distribution transformer is also popularly known as an isolation transformer. It changes high voltage to low voltage applied in electric energy distribution. Thus, it provides the final voltage transformation in the electric power distribution system.

Q: What are common power transformer problems?

A: Electrical failure of a transformer typically happens from damage to the insulation. This destruction may happen naturally over time. However, other causes include excessive voltage, frequent fault currents, mechanical damage to the insulation or overloads that increase degradation.

Q: What is the lifespan of a power transformer?

A: On average, the industry benchmarks for transformer longevity are as follows: Dry-type Transformers: Typically last between 20 and 30 years. Power Transformers (oil-filled): These can last anywhere from 30 to 50 years, depending on the operating conditions and the frequency of maintenance.

Q: Can a power transformer be repaired?

A: In most cases, you can either repair or replace transformer coils in case of damage. Depending on the nature of damage and the method adopted, the transformer may go back to its full functionality or not.

As one of the leading power transformer manufacturers and suppliers in China, we also support customized service. With over 20 years' experience, we warmly welcome you to buy high quality power transformer made in China here from our factory. For price consultation, contact us.

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