3000 3150KVA Dry Type Transformer

The Usune 3000 3150KVA Dry Type Transformer is an oil-free unit that eliminates the need for traditional insulating oil, relying instead on air for insulation and heat dissipation. Compared to oil-immersed transformers, this product offers superior safety, eliminates the risk of oil contamination, and entails very low long-term maintenance costs. It is ideally suited for indoor environments that are enclosed, densely populated, or require highly reliable power supplies. The dual-specification range (3000 kVA and 3150 kVA) meets the varying voltage transformation and power transmission needs of both industrial and civil applications.

Working Principle

The 3000 3150KVA Dry Type Transformer operates based on the principle of electromagnetic induction to transform voltage and transmit electrical energy. When alternating current (AC) flows through the primary winding, the iron core generates an alternating magnetic flux; this flux permeates the secondary winding, inducing an electromotive force through electromagnetic induction. By adjusting the turn ratio between the primary and secondary windings, the transformer achieves voltage step-up or step-down and ensures stable power transmission.

The unit utilizes air as the medium for both insulation and heat dissipation throughout its operation, requiring no insulating oil. It relies on natural or forced air cooling, featuring a simple, safe, and stable structure that fundamentally eliminates risks associated with oil leaks, fires, or explosions.

Core Product Advantages

1. High Safety Rating

The oil-free design inherently provides fire and explosion resistance. It eliminates the risk of fires or contamination accidents caused by oil leaks, making it suitable for enclosed, high-risk power supply environments such as subways, hospitals, and shopping malls.

2. Stable Operational Performance

Optimized core and winding structures result in low partial discharge, minimal operating noise, and weak electromagnetic interference. The unit supports long-term, continuous operation under load with stable voltage output, ensuring a reliable power supply for precision equipment.

3. Eco-friendly and Maintenance-free

Oil-free and requiring no waste fluid disposal, the unit is environmentally friendly. With no vulnerable oil-circuit components, it is virtually maintenance-free throughout its lifecycle, significantly reducing operational costs and the risk of downtime for enterprises.

4. Broad Application Suitability

Designed for indoor installation, the unit is suitable for a wide range of mainstream power distribution scenarios, including commercial buildings, campuses, hospitals, industrial plants, and urban rail transit systems.

Real-World Application Cases

1. Urban Subway Indoor Power Distribution Project

A domestic subway line adopted Usune 3150kVA dry-type transformers in bulk for station power supply. Given the strict fire and explosion safety requirements of enclosed subway spaces, the product’s oil-free safety features make it an ideal fit for underground conditions, while its low-noise operation improves the station environment. The equipment has operated without failure, ensuring a continuous and stable power supply for signaling, lighting, and power systems.

2. Large-Scale Industrial Plant Capacity Expansion Project

A domestic new energy factory procured multiple Usune 3000kVA dry-type transformers to support new production lines. The products feature minimal voltage fluctuation and low partial discharge, effectively ensuring the stable operation of precision manufacturing equipment. Their maintenance-free nature reduces the workload for routine inspections, providing reliable power support for continuous factory production.

3. Smart Power Distribution Upgrade for a Top-Tier (Grade III-A) Hospital

A top-tier hospital selected Usune 3150kVA dry-type transformers to upgrade its internal power distribution system. To meet the high reliability requirements of precision medical equipment, the product’s characteristics—low interference, high safety, and stable operation—effectively prevent power supply anomalies from affecting diagnostic and treatment equipment, thereby satisfying the rigorous power standards of medical environments.

Product Technical Specifications

The core specifications of the Usune 3000 3150KVA Dry Type Transformer align with national and industry standards. Offering stable performance and high adaptability, it meets the requirements for various project acceptance inspections and long-term operation. Key specifications are as follows:

1. Rated Capacity: 3000kVA / 3150kVA;
2. Phase/Frequency: Three-phase, 50Hz;
3. Cooling Method: AN (Natural Air Cooling) / AF (Forced Air Cooling);
4. Insulation Medium: Air insulation (no insulating oil);
5. Operating Noise: Low-noise design; operating decibel levels are well below industry standards;
6. Partial Discharge: Ultra-low partial discharge, suitable for precision power applications;
7. Protection Class: Suitable for standard indoor protection requirements; protection levels can be customized upon request;
8. Service Life: ≥30 years under standard operating conditions.

Project Reference

Cas-space Rocket Launch Project

Test Report

Installation and Operating Environment Requirements

1. Installation Site: Indoor installation only; requires adequate space for ventilation and heat dissipation; avoid enclosed, unventilated environments;
2. Ambient Temperature: Standard operating temperature range of -20°C to +40°C; avoid exposure to high-temperature direct sunlight or low-temperature condensation;
3. Environmental Conditions: The installation site must be free from corrosive gases, flammable or explosive dust, severe vibration, and electromagnetic interference;
4. Installation Requirements: Equipment must be installed level and securely fixed; allow sufficient clearance for maintenance and heat dissipation; standard power distribution protection devices are sufficient;
5. Altitude: Suitable for standard altitude regions; customized solutions are available for high-altitude areas.

FAQ

Q1: What are the key differences between Usune dry-type transformers and traditional oil-immersed transformers?

The core difference lies in the insulation and heat dissipation media. Usune dry-type transformers use air for both insulation and cooling, requiring no insulating oil, whereas oil-immersed transformers rely on insulating oil for these functions. This product offers superior safety (fire resistance), is pollution-free, and is maintenance-free, making it ideal for indoor use, densely populated areas, and critical public facilities.

Q2: How should I choose between the 3000kVA and 3150kVA models?

The 3000 kVA model is suitable for medium-load applications such as small-to-medium commercial buildings, standard industrial plants, and community power distribution facilities. The 3150 kVA model offers higher capacity, making it ideal for high-load scenarios requiring uninterrupted, highly reliable power—such as large factories, metro systems, top-tier (Grade III-A) hospitals, and large campuses; the specific model can be selected based on actual load requirements.

Q3: Do Usune dry-type transformers require regular maintenance, and what is their service life?

They are maintenance-free under standard operating conditions, eliminating the need for periodic oil changes or oil-circuit servicing required by oil-immersed equipment; only periodic cleaning of dust from the ventilation openings is necessary. With standard installation and normal operating conditions, the equipment has a service life of over 30 years, resulting in lower overall ownership costs.