What is dry type transformers?

DRY-TYPE TRANSFORMERS also called cast resin transformer, also known as the SolidCast Transformer, stands as a pinnacle of efficiency and safety in power distribution. Unlike traditional liquid-filled transformers, the Power-Safe model boasts a solid design, free from any rotating parts. This innovative construction ensures maximum utilization of eco-friendly insulation systems for optimal performance.

Dry type transformers Applications

Varelen design and manufacturing dry type transformer is suitable for power transmission and distribution system, hotel, restaurant, hospitals, shopping malls, bank buildings ,stadiums, airports, stations especially heavy load centers and places with special fire protection requirements.

Dry type transformers offer numerous advantages, making them a preferred choice in various applications. Let's delve into their key benefits:

three phase dry type transformers advantages

1. Self-Extinguishing and Low Fire Hazard: Dry type cast resin transformers are equipped with eco-friendly insulation materials, allowing them to self-extinguish in the event of a fire. This flame-retardant feature ensures enhanced safety and ease of maintenance. Unlike conventional transformers, they do not emit toxic gases during arcing incidents, further minimizing hazards.

2. Zero Oil Usage: Unlike oil-filled transformers, dry type transformers rely solely on air for cooling, eliminating the need for oil or other liquids. This not only reduces operational expenses but also mitigates environmental risks associated with oil leaks and spills. With minimal maintenance requirements, they offer worry-free operation and long-term cost savings.

3. Eco-Friendly and Safe Operation: Dry transformers do not utilize oil or other liquids, minimizing the risk of environmental pollution. Their self-extinguishing properties make them safer to use, with a lower likelihood of explosions. Additionally, they can withstand adverse weather conditions, making them suitable for various environments, including heavily polluted areas.

4. Low-Cost Installation and Lower Load Losses: Thanks to their low-risk nature, dry type transformers boast simplified installation processes with fewer environmental precautions. With minimal restrictions, they offer cost-effective solutions for power distribution. Additionally, their low load losses contribute to energy efficiency and reduced operational expenses over time.

5. Low Maintenance: Dry type transformers are renowned for their low maintenance requirements. With proper ventilation, they remain free from dirt buildup and do not require liquid testing. While routine expert inspections are recommended, they offer hassle-free operation and reliability for over two decades.

6. High Efficiency: Dry type transformers are designed for optimal energy efficiency, resulting in lower electricity consumption and reduced carbon footprint. This makes them a sustainable choice for power distribution, aligning with environmental conservation efforts.

7.  Enhanced Safety : In addition to being self-extinguishing, dry type transformers may incorporate enhanced safety features such as overload protection and short-circuit prevention mechanisms. These features further enhance their reliability and safety in operation.

8. Compact Design: With their compact design, dry type transformers offer space-saving solutions for power distribution systems. This allows for more efficient use of available space, especially in constrained environments.

What is the dry type transformer Construction and features

1. The three-limb iron core is made of oblique cut Grain-oriented, low-loss, seven-step silicon steel laminations insulated on both sides, guaranteeing low losses and low noise and these values are even improved by laser treatment. It is protected on the surface with a flash-proof varnish in order to prevent the sheet from corroding and to reduce the noise.
2. Clamping frame: it adopts CNC cutting, bending and one punch forming processes, the hole’s size is accurate and the appearancelooks delicate 
3. TheTransformer winding generally consists of aluminum or copperfoils isolated to increase short-circuit withstanding capability The HV winding adopts an aluminum or copper coil insulated by the F or H class insulation system as the conductor casted in vacuum  
4. In order to avoid the fire and pollution, Varelen practicesstrict exclusive casting system of F(155℃)or H(180℃). After the winding process is finished, the windings will be put in the mould, injected the epoxy resin and casted in the cast resin equipment.
5. Insulation made of resin makes the transformer extensively maintenance-free, moisture-proof and suitable for dust-proof, fire-resistant and self-extinguishing.
6. High voltage tap to adapt respective network conditions.

How does it work?

Unlike its liquid-filled counterparts, which rely on substances like oil for cooling and insulation, the Power-Safe Dry Type Transformer operates through voltage alteration. This means that instead of cooling liquid, it leverages airflow to maintain optimal operating temperatures. Simply place the transformer in a well-ventilated area, and let the coils cool effortlessly.

Varelen dry type transformer is the best choice for specific markets where safety or ecology are main concerns.