Efficient Transformers Drying with the LFD Power Transformers Drying Machine by GlobeCore
In the realm of high-voltage equipment maintenance, transformers drying plays a critical role in ensuring optimal performance and prolonged service life. Moisture is a primary enemy of insulation systems in power transformers, causing electrical breakdowns, reducing dielectric strength, and accelerating aging. To combat this challenge, GlobeCore developed the LFD power transformers drying machine, a cutting-edge solution engineered to meet the most demanding industrial requirements.
Why Drying Transformers Is Essential
Moisture ingress in transformers can occur due to manufacturing processes, storage conditions, or long-term operation. Even a small amount of water can lead to:
- Decreased dielectric strength of insulation oil
- Formation of bubbles under high temperatures and loads
- Accelerated aging of cellulose insulation
- Increased risk of partial discharges and breakdowns
Traditional drying methods often involve removing the transformer from the site or using stationary ovens and vacuum chambers. These methods can be time-consuming, expensive, and impractical for on-site service. The modern approach is mobile, efficient, and capable of in-situ application — just like GlobeCore’s LFD drying unit.
Introducing the LFD Power Transformers Drying Machine
The LFD machine from GlobeCore is a high-performance, mobile drying system designed for both oil-filled and dry-type transformers. It operates on the principle of low-frequency heating (LFH), a revolutionary technology that heats the core and windings from the inside, drying the insulation thoroughly without dismantling the transformer.
Key Features:
- Low-Frequency Heating Technology: Unlike traditional external heating, LFH creates uniform heating across the transformer windings and core, ensuring faster and deeper moisture removal.
- Non-invasive Method: The transformer remains sealed during the drying process, eliminating the risk of additional moisture or contamination.
- Energy Efficiency: LFH consumes significantly less power than conventional vacuum ovens or hot air systems.
- Safe and Controlled Process: Integrated temperature sensors, power control, and monitoring systems provide full automation and safety during operation.
- Portability: The LFD unit is designed for easy transportation, allowing drying of transformers directly at substations or industrial sites.
How It Works
The LFD drying machine uses a controllable low-frequency current that flows directly through the transformer windings. This current generates Joule heat (resistive heating), raising the temperature of the internal insulation. The heat drives out moisture from cellulose and other insulating components toward the surface, where it can be evacuated through vacuum systems or absorbed by desiccants.
The process typically includes the following steps:
- Connection to the Transformer: The unit connects to the transformer windings using safe, high-quality terminals.
- Controlled Heating: Low-frequency current is applied, heating the windings gradually.
- Moisture Removal: Water is extracted either under vacuum or with the help of auxiliary drying equipment.
- Monitoring and Control: Real-time sensors track temperature, moisture levels, and drying progress.
- Completion: Once moisture content reaches acceptable levels, the process is safely concluded.
Advantages of GlobeCore’s Transformers Drying Solution
The LFD unit offers several distinct advantages over traditional drying methods:
- Faster Drying Time: Heating from the inside reduces drying time by up to 60%.
- Improved Insulation Integrity: Uniform heating avoids hotspots and preserves the dielectric structure of materials.
- Cost Savings: In-situ drying eliminates transport and disassembly costs.
- Reduced Downtime: Quick setup and operation ensure minimal interruption of transformer service.
- Environmental Safety: No need for oil drainage, minimizing risk of spills or contamination.
Applications of the LFD Drying Machine
GlobeCore’s LFD drying equipment is used worldwide in various sectors, including:
- Power generation plants
- Substations
- Industrial enterprises
- Transformer repair and service centers
- Renewable energy facilities
Whether for routine maintenance, emergency repair, or transformer commissioning, the LFD machine is an indispensable tool for ensuring transformer reliability and longevity.
Power transformers drying machine at electric power plants LFD Sprcifications
| № | Parameter | Value | |
| 1 | Maximum input current (AC), А | 185 | |
| 2 | Maximum output current (sinusoidal AC), A | 200 | |
| 3 | Automatically controlled AC output voltage, V | 0-400 | |
| 4 | Ambient temperature, °C | 0-40 | |
| 5 | Relative humidity, % | There must be no condensation |
|
| 6 | Output frequency, Hz | 0.5-5 | |
| 7 | Ingress Protection Rating | IP 54, IK 09 | |
| 8 | The power supply parameters | Any options on customer’s request |
|
| 9 | Dimensions, mm | length | 800 |
| width | 800 | ||
| height | 2000 | ||
| 10 | Weight, kg | 500 | |
Technical Specifications
- Heating Current: Low frequency (0.1–1.0 Hz), adjustable
- Control System: Fully automated PLC with touch screen interface
- Power Output: Customizable based on transformer size and rating
- Temperature Monitoring: Multiple channels for precision control
- Mobility: Mounted on a trailer or skid frame for field deployment
Why Choose GlobeCore?
With over 25 years of experience in transformer oil purification, regeneration, and service equipment, GlobeCore stands as a trusted global partner in electrical maintenance solutions. The LFD transformers drying machine is a testament to the company’s commitment to innovation, energy efficiency, and operational excellence.
GlobeCore machines are used in more than 100 countries, supported by local representatives and service centers. Each unit is manufactured to international standards, ensuring reliability, safety, and long service life.
Effective transformers drying is critical to maintaining the reliability and safety of electrical infrastructure. The LFD power transformers drying machine from GlobeCore represents a state-of-the-art solution that combines portability, speed, and deep insulation drying without the need for dismantling or transporting transformers. By investing in advanced LFH technology, industries can prevent costly failures, extend equipment lifespan, and ensure continuous power supply.
