Dry Type Three-phase Double-winding Non-exciting Voltage Regulating Distribution Transformer,Efficiency Level 2

The SCB14 series epoxy resin cast dry-type transformer is a high-performance dry-type transformer characterized by superior electrical strength, mechanical durability, and heat resistance. It is an excellent choice for urban power grid transformation projects. Manufactured using advanced production and testing equipment in accordance with stringent technological standards, this Three Phase Dry Transformer offers high reliability and a long service life. Depending on the application environment, it can be equipped with various levels of protective shell or without a shell. This makes it suitable for a wide range of environments including high-rise buildings, commercial centers, hospitals, airports, subways, tunnels, densely populated residential areas, as well as special environments such as oil refineries, chemical plants, nuclear power plants, and nuclear submarines.

·High Voltage Winding

The high voltage winding is vacuum-cast with epoxy resin containing fillers, significantly reducing discharge volume and enhancing the electrical strength of the coil. The inner and outer walls of the winding are reinforced with glass fiber mesh cloth, improving the impact toughness of the coil and its resistance to sudden short circuits. This ensures that the coil will not dry out or crack over time.

·Low Voltage Winding

The low voltage winding features a foil structure that resolves issues related to radial spiral angles during wire winding, ensuring more balanced ampere-turns. Radial cooling air ducts are incorporated into the coil design to improve heat dissipation. The winding solid layer is made from DMD epoxy resin prepreg cloth, forming a robust dry solid structure through overall dry solid molding.

·Iron Core:

The core is constructed from high-quality cold-rolled silicon steel sheets with a 45° full oblique joint structure. The core column is bound with F-grade weftless adhesive tape, and the core surface is coated with epoxy resin, effectively reducing no-load loss, no-load current, and core noise. Clamping parts and fasteners undergo unique surface treatments to enhance the  appearance quality of the product.

· Low Loss: Compared to SCB11 products, the no-load loss of SCB14 is reduced by over 15%, and load loss is decreased by more than 10%. This results in significant energy savings, making the operation both economical and durable.

· Low Noise: The noise intensity of SCB14 is more than 10-15dB lower than the current standard JB/T10088-1999 "6-220KV Transformer Sound Level".

· Low Partial Discharge: SCB14 exhibits very low partial discharge, controlled below 5pC. Both high and low voltage electromagnetic coils are cast under vacuum and pressure, resulting in a compact dry solid structure that is resistant, explosion-proof, and environmentally friendly.

· Self-extinguishing Properties: Coil materials, including glass fiber and other insulating layers, possess self-extinguishing characteristics, preventing arcs caused by short circuit faults. Epoxy resin does not produce toxic substances even at high temperatures.

· High Impact Toughness: The use of epoxy resin with fillers minimizes thermal expansion differences within the casting body, reduces curing shrinkage rates and thermal stress, and increases the hardness of the dry solid. The internal and external epoxy resin coating layer of the high and low voltage coils, contains prefabricated component lifting materials, creating a high-density structure similar to concrete. This enhances impact toughness, allowing the transformer to withstand sudden short circuit fault without damage.

· Terminal Connectors

· Cast resin coils

· Epoxy Resin Capacitive Insulator

· Special Termination Arrangement

· Cable Box / Bus Duct

· Cooling Fan

· Rollers (Uni-Directional / Bi-Directional) Protection with Temperature Scanner

· Scanner Off Circuit Tap Changer