300 kVA Dry Type Transformer for Indoor & Industrial Use | UL/CSA Certified

This 300 kVA dry-type transformer is engineered to deliver a highly efficient and safe power distribution solution for indoor commercial and industrial environments. Holding UL and CSA certifications, it meets the highest safety and quality standards in North America, making it the ideal choice for industrial plants, office buildings and critical infrastructure.

 

Featuring high-grade cast resin insulation, this dry-type transformer boasts exceptional moisture, dust and fire resistance, which significantly enhances operational safety in harsh conditions. Its copper windings and silicon steel core are meticulously designed to minimize energy losses and improve heat dissipation, ensuring reliable and long-lasting operation.

 

Housed in a robust, corrosion-resistant enclosure, this 300 kVA dry-type transformer is suitable for indoor installation, with minimal maintenance requirements and stable, dependable performance. It fully complies with industry standards including ANSI, IEEE, UL 1562 and CSA C2.1, and is CE certified, rendering it suitable for key markets including the United States, Canada, Germany, France, the United Kingdom, the Netherlands, Spain and Italy.

 

The 300 kVA dry-type transformer offers a wide range of customization options, including voltage tap changers, mounting configurations and cooling systems, all tailored to specific project requirements. It is widely deployed in industrial facilities, data centers, medical institutions and renewable energy grid connection projects across North America and Europe.

 

GNEE is a trusted manufacturer and supplier of 300 kVA dry-type transformers, providing factory-direct pricing, flexible OEM/ODM solutions and a reliable supply chain. Our transformers serve a diverse customer base, including EPC contractors, utility companies and commercial developers in the United States, Canada, Germany, France, the United Kingdom, the Netherlands, Spain, Italy and other countries and regions.

 

 

Learn More: 1000 kVA Cast Resin Transformer, 13.8 kV to 480Y/277V Dry-Type Distribution

 

Load Capacity of 300 kVA Transformer

This 300 kVA dry-type transformer is designed with a load capacity of approximately 300,000 VA, capable of meeting a variety of industrial and commercial power demands. Depending on the primary and secondary voltage configurations, it can efficiently power medium-sized manufacturing plants, commercial buildings, data centers and renewable energy projects across North America and Europe. Built with a rugged design, it ensures stable operation under full and moderate overload conditions for reliable energy distribution.

 

Price Range of 300 kVA Transformer

The price of a 300 kVA dry-type transformer is subject to various factors, such as insulation type, cooling method, enclosure rating and optional features. Generally, standard UL/CSA certified models for indoor and outdoor use are priced from US$5,000 to US$9,000. Custom configurations, special certifications or premium materials may affect the pricing. We offer highly competitive factory-direct prices for customers in the United States, Canada, Germany, France, the United Kingdom, the Netherlands, Spain, Italy and other key markets.

 

Learn More: Understanding the 112.5 kVA Transformer – A Complete Guide from GNEE

 

Dimensions of 300 kVA Transformer

Typical dimensions of the 300 kVA dry-type transformer range approximately as follows:

• Length: 1100 – 1300 mm
• Width: 800 – 950 mm
• Height: 1300 – 1600 mm

Specific dimensions depend on the enclosure type (NEMA 1, NEMA 3R, IP23) and cooling system (AN or AF). Its compact design ensures easy installation in industrial and commercial premises with limited space.

 

Rated Current (Amperes) of 300 kVA Transformer

The rated current of a 300 kVA transformer varies with voltage classes:

At a secondary voltage of 480V, the approximate full-load current is 360 Amperes.

At 600V, the full-load current is approximately 288 Amperes.

The primary side current depends on the rated primary voltage (e.g., 13.8 kV) and connection type.These ratings are critical for system design, circuit protection and load balancing.

 

Weight of 300 kVA Transformer

The typical weight of a 300 kVA dry-type transformer ranges from 900 kg to 1400 kg. Variations in weight are due to the materials used (copper or aluminium windings), enclosure specifications and cooling methods. Our transformers feature a robust design while being engineered for easy transportation and installation.

 

Learn More: 1500 kVA Three-Phase Dry-Type Transformer | Indoor Industrial Power Distribution

 

Customization Options for 300 kVA Transformer

We offer comprehensive customization services including:

Custom voltage classes tailored to your grid requirements (e.g., 11 kV, 13.8 kV, 15 kV on the primary side; 480 V, 400 V on the secondary side)

• Cooling methods: Air Natural (AN) or Air Forced (AF)
• Enclosure types: NEMA 1, NEMA 3R, IP23/IP44 (indoor/outdoor)
• Vector groups and connection configurations (Delta-Star, Star-Star, Delta-Delta, etc.)

Our engineering team works closely with customers to deliver transformers optimized for each application, with special features such as seismic resistance, low-noise design and intelligent monitoring interfaces available.

 

Cost Factors of 300 kVA Dry-Type Transformer

Key factors influencing the cost include:

• Material selection (copper vs. aluminium windings)
• Insulation and fire resistance classes
• Complexity of the cooling system and enclosure rating
• Additional accessories and control systems
• Certification requirements for specific markets (UL, CSA, CE)

Understanding these requirements helps customers select a cost-effective solution that aligns with their budget and regulatory compliance needs.

 

Learn More: 2500 kVA Dry Type Transformer for Industrial Applications - High Voltage, Indoor Installation

 

Factory Visits and Customer Inspections

We sincerely invite customers to visit our factory and witness the production process of 300 kVA dry-type transformers in person. During the visit, you will have the opportunity to learn about every step from coil winding and resin casting to final testing, gaining a comprehensive understanding of our stringent quality control system and advanced manufacturing processes. An on-site visit allows you to clearly see our exquisite craftsmanship and product reliability, thereby building trust and strengthening cooperation. Please make an appointment in advance for the visit, so that our team of experts can provide you with exclusive support and create a smooth, informative visit experience tailored to your needs.

 

Learn More: 300 kVA vs 500 kVA Transformer Selection Guide (2026 Edition)

 

Lead Time of 300 kVA Transformer

The standard lead time for 300 kVA dry-type transformers is typically 4 to 8 weeks, subject to order volume, customization requirements and delivery destination. For customers in North America (the United States, Canada) and Europe (Germany, France, the United Kingdom, the Netherlands, Spain, Italy), we keep stock available for fast shipping and offer expedited production for urgent projects. Our logistics team coordinates efficient shipping methods including sea, air or land transport to ensure reliable delivery times.

 

Why Choose GNEE's 300 kVA Dry-Type Transformer – 13.8 kV to 480Y/277V

GNEE's 300 kVA dry-type transformer is engineered for safe, efficient and low-maintenance voltage conversion in indoor commercial, industrial and utility environments across North America and Europe. It is the ideal choice for data centers, factories, logistics hubs and clean energy projects.

 

🔹 Key Advantages:

 

Globally Certified for Use

Fully compliant with UL, CSA, IEC 60076-11 and CE standards. Approved for use in the United States, Canada, Germany, the United Kingdom, France and other countries/regions.

 

fficient and Reliable Operation

Featuring copper windings, a low-loss silicon steel core and an Air Natural (AN) design, it delivers stable performance and high energy efficiency.

 

Compact and Safe

Dry-type epoxy resin encapsulation eliminates the need for oil, reducing fire risks and maintenance requirements. Perfect for installation in schools, hospitals, indoor electrical rooms and other such premises.

 

Customizable Configurations

Supports Dyn11 and other vector groups; voltage tap settings and intelligent temperature monitoring are optional features. IP23 or IP44 rated enclosures are available for enhanced protection.

 

Fast Shipping

Standard lead time of 3-5 weeks for delivery to EU and North American ports. DDP and CIF shipping terms are supported.

GNEE is your trusted partner for 300 kVA dry-type transformer solutions. Whether you are powering commercial premises, electric vehicle charging networks or industrial facilities, we deliver certified, high-efficiency and scalable durable products.

 

📩 Request a quote or datasheet now to simplify your 13.8 kV to 480Y/277V power conversion needs.

Request A Quote

 

300 kVA Dry Type Transformer Technical Specs

No.	Item	Specification	Remarks
1	Power Rating	300 kVA	Available from 15 kVA up to 1500 kVA to meet diverse needs
2	Primary Voltage	12 kV or 13.8 kV (Delta connection)	Customizable up to 35 kV for specific industrial applications
3	Secondary Voltage	480Y/277 V (Wye grounded neutral)	Other configurations include 208Y/120 V, 240/120 V, and 600Y/347 V
4	Phase	Three-phase, 50/60 Hz	Single-phase and other phases available upon request
5	Insulation Type	Cast Resin Dry Type	Eco-friendly, fire-retardant, and maintenance-free
6	Insulation Class	Class F (155°C)	Optional upgrade to Class H (180°C) and beyond
7	Temperature Rise	115°C standard	Custom options for higher temperature rises
8	Cooling Method	Air Natural (AN), Air Forced (AF)	Suitable for indoor and outdoor installations with IP23 option
9	Impedance Voltage	5% to 6.5%	Adjustable based on project requirements
10	Short Circuit Withstand	30-60 seconds	Extended withstand durations available upon request
11	Voltage Taps	±2.5%, ±5%, 3-5 taps	Supports voltage adjustment for grid stability
12	Frequency	50 Hz / 60 Hz	Versions available to accommodate both European and North American grids
13	Insulation Resistance	≥1000 MΩ	Guarantees long-lasting insulation performance
14	Leakage Magnetic Flux	Low leakage design	Minimizes electromagnetic interference in sensitive environments
15	Core Material	Grain-oriented cold-rolled silicon steel	Ensures low no-load losses and high efficiency
16	Winding Material	High-purity oxygen-free copper	Provides excellent conductivity and thermal endurance
17	Enclosure Material	Heavy-duty cold-rolled steel	Corrosion-resistant, dust and rain protection (NEMA 3R rating)
18	Protection Rating	NEMA 3R standard	Optional NEMA 1 or NEMA 12 available for specialized indoor use
19	Operating Temperature Range	-25°C to 45°C	Extended ranges (-40°C to +55°C) for harsh climates available
20	Humidity Adaptability	0% to 95%, non-condensing	Suitable for high humidity and damp environments
21	Noise Level	≤55 dB(A)	Quiet operation designed for commercial and urban settings
22	Approximate Weight	900–1200 kg	Weight varies depending on customization
23	Dimensions (L x W x H)	Approx. 1200 x 900 x 1400 mm	Custom dimensions offered to meet site-specific constraints
24	Standards Compliance	ANSI C57.12, IEEE C57.12.91, UL, CSA, CE	Meets regulatory requirements for North American and European markets
25	Warranty	2 to 5 years	Extended warranty packages available for peace of mind
26	Typical Applications	Commercial buildings, industrial facilities, renewable energy integration, data centers	Suitable for solar farms, wind power projects, manufacturing plants, and utility grids
27	Global Supply & Service	Worldwide shipping and support	Focused distribution in North America (USA, Canada, Mexico) and Europe (Germany, France, UK, Netherlands, Italy)