330KV Power Transformer
Your Leading 330KV Power Transformer Supplier
Trust In Grid Co., Ltd. is a professional transformer manufacturer, specializing in the design and production of power transformer, high-voltage switchgear, power distribution equipment, energy storage systems (ESS), magnetic wire, bushing and machining parts. Our power transformers are available in 500KV, 330KV, 220KV, and 110KV models, and are widely used in power utilities, renewable energy systems (solar and wind), industrial facilities, data centers, transportation infrastructure, and OEM applications.
Why Choose Us?
Production Capacity
With 6 factories covering 240,000 m², over 2,000 employees, and 200+ engineers, we support large-scale projects and long-term global supply with more than 30 years of export experience.
Advanced Equipment
We operate a complete set of in-house production equipment, including cutting, winding, CNC machining, vacuum drying, and testing systems, with over 450 machines ensuring stable quality and efficient output.
Quality Control
All products are manufactured and tested in compliance with IEC, IEEE, ANSI, CSA, UL/cUL, CE, and ISO 9001:2015 standards, ensuring reliable performance and smooth international approval.
OEM & ODM Capability
Our engineering team provides OEM/ODM support, including customized design and technical optimization, delivering tailored solutions for utility, industrial, and renewable energy projects.
Technical Specifications of 330KV Power Transformer
|
(MVA) |
Rated Voltage and Tapping Range |
Vector Group |
No Load Current |
Short-circuit Impedance |
No load Losses |
On load Losses |
||
|
HV |
Tapping Range |
LV |
||||||
|
90000 |
330 |
±2×2.5 |
10.5 |
YNyn0d11 |
0.37 |
HV~MV: |
42 |
302 |
|
120000 |
0.37 |
53 |
374 |
|||||
|
150000 |
0.34 |
63 |
442 |
|||||
|
180000 |
0.34 |
72 |
507 |
|||||
|
240000 |
0.32 |
89 |
629 |
|||||
Core:
The core, a basic part of a transformer, refers to the magnetic core around which the primary and secondary windings are wound. Soft iron is used to reduce eddy current loss and hysteresis loss and provide a low reluctance path for flux current.
Windings:
Another basic part of the transformer is its windings, consisting of two sets: the primary, linked to the input voltage, and the secondary, linked to the load, typically constructed using insulated copper or aluminium wire, facilitating energy transfer between high voltage and low voltage circuits.
Insulation:
Transformer insulation refers to the utilisation of specific materials or methods to hinder or diminish the transfer of heat, electricity, or sound between elements or within systems.
Bushings:
Transformer bushings are electrical devices used in power transformers and other electrical equipment to provide insulation and support for the conductors that pass through the walls of the equipment.
Tap Changer:
An important part of a transformer, the tap changer enables the adjustment of the transformer' s turns and voltage ratios by shifting the tapping point on the winding. There are two types of tap changers: on-load, which allows changes without isolating the transformer from the supply and off-load, which requires disconnecting the transformer from the supply
Terminals:
Transformer terminals are essential connection points in transformers, with primary terminals receiving high-voltage electrical energy and secondary terminals delivering lower voltage to loads.
Cooling Tube:
Cooling tubes, also known as cooling pipes or cooling channels, are channels or conduits integrated into the design of transformers, used to cool the transformer by facilitating the circulation of a coolant, typically oil or a cooling medium, for efficient heat dissipation.
Transformer Tank:
The transformer tank is a sealed enclosure or container that houses the essential components of a power transformer, including the core, windings, insulation, cooling systems, and various auxiliary devices.
Breather:
A breather, also known as a silica gel breather or air breather, is a device used in power transformers to control the quality of air entering and leaving the transformer shell.
Explosion Vent:
An explosion vent, a metallic pipe positioned just above the conservator tank and featuring a diaphragm at one end, is a specific type of pressure relief device used in transformers to mitigate the risks associated with explosions or rapid pressure buildup.
Oil Tank:
An oil tank refers to the container or enclosure that houses the transformer oil, such as mineral oil and silicone oil. These tanks are typically constructed from robust materials like steel to provide both structural integrity and the ability to endure the mechanical and thermal challenges that come with the operation of transformers.
Buchholz Relay:
The Buchholz relay, one of the most important components of oil-immersed transformers rated over 500kVA, is a protective device used to detect faults and abnormal conditions within the transformer.
Winding Taps:
Winding taps are additional connection points on the transformer windings that provide flexibility in adjusting the turn ratio of the transformer.
Oil conservator:
The conservator is an expansion tank connected to the transformer’s oil tank, accommodating oil volume changes due to temperature variations.
Core Efficiency Benefits of 330KV Power Transformer
|
Efficiency Feature |
Transformer Role |
|
Voltage Step-Up |
Reduces current for transmission, cuts resistive losses |
|
Voltage Step-Down |
Prepares safe voltage for distribution to end-users |
|
Tap Changer (OLTC) |
Adjusts output voltage to maintain grid voltage stability |
|
Low Core and Copper Losses |
High-grade CRGO steel and optimized windings minimize internal losses |
|
Thermal Management |
Advanced cooling prevents overheating, preserves efficiency |
Core Lamination Process
The transformer core is manufactured using high-grade CRGO silicon steel to minimize core loss and improve efficiency.
Winding Process (Copper / Aluminum)
Windings are produced using high-conductivity copper or aluminum, depending on project requirements.
Vacuum Drying & Oil Filling
This process ensures optimal insulation performance and long-term reliability.
Testing & Quality Control
Each transformer undergoes strict testing procedures in accordance with international standards.
Final Assembly & Packaging
Final assembly ensures mechanical integrity and readiness for transportation and installation.
Customization Options
Material: Cu / Al
Cooling system: Customizable
Structure: Customizable
MOQ: Customizable
Our Service Highlights
Pre-Sales Consultation & Design Support
Early technical engagement to define requirements and deliver optimized solutions.
During Sales & Project Execution
Transparent project management with controlled production, quality tracking, and on-time delivery.
Warranty Advantage
Minimum 2-year warranty on all products, ensuring reliable and risk-free operation.
After-Sales Support
24/7 technical support with fast response, spare parts availability, and training services.
Long-Term Partnership
Lifelong technical support and upgrade guidance for sustained performance.
Packaging & Shipping
Packaging details:
Shockproof foam/moisture-proof film, professional export cartons/wooden crates/pallets.
Final assembly ensures mechanical integrity and readiness for transportation and installation.
Certificates
We're well-known as one of the leading 330kv power transformer manufacturers and suppliers in China, also support customized service. Please feel free to buy high quality 330kv power transformer made in China here from our factory. Contact us for more details.
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