In power transmission, transformers enable efficient long distance transfer of energy by stepping voltages up and down. At generating stations, step up transformers increase voltage to transmission levels, reducing current and line losses. Along transmission routes and at receiving ends, step down transformers reduce voltage to levels suitable for sub transmission and distribution networks. They also facilitate interconnection of systems with different voltage tiers, support voltage regulation via tap changers and help control short circuit levels. Without transformers, high voltage transmission and modern interconnected grids would not be practical.

Size is determined by load demand, fault levels, voltage class, cooling method, and service conditions. kVA and voltage dictate conductor size, insulation, and core dimensions.

Mineral or synthetic oil in power transformers acts as both an electrical insulator and a cooling medium. The oil fills voids around windings, increases dielectric strength, and allows high voltage clearances to be reduced compared to air. It also transfers heat from the windings and core to the tank and radiators, where it is dissipated to ambient air or water. The combination of good dielectric properties, thermal capacity and circulation makes oil a very effective medium for high voltage, high MVA transformers.

kVA rating, voltage levels, impedance, vector group, cooling class (ONAN, ONAF, OFAF, etc), frequency, BIL, tap range, temperature rise, and insulation class define transformer performance and compatibility.

It includes product ratings, voltage taps, insulation classes, winding configurations, mounting options, and application notes for industrial and commercial use.

By thoroughly removing moisture and reducing air voids, vacuum drying improves the dielectric properties of insulation, which directly enhances transformer reliability and extends operational life. Drier insulation reduces the likelihood of electrical breakdowns, thermal aging, and moisture-related degradation, leading to fewer failures and longer maintenance intervals.

FRA (or SFRA) injects a low-voltage swept-frequency signal into windings and measures the response, creating a fingerprint of the mechanical and electrical network. Changes in the signature over time can indicate winding displacement, core movement, clamping loosening, or lead deformation caused by faults, transport shocks, or short-circuits. It is extremely sensitive to mechanical changes and is widely used after shipping, fault events, or major short-circuit incidents to verify internal mechanical integrity without de-tanking.

Costs reflect kVA rating, voltage class, cooling type (ONAN/ONAF/ODAF), impedances, accessories, testing, logistics, and installation.

GlobeCore offers portable oil filtration and degassing carts for transformer oil servicing. Please confirm oil type, capacity, and voltage to receive technical and pricing information.

Bitumen emulsion is widely used in tack coats, surface dressing, and cold mix applications due to its eco-friendly, energy-saving nature. GlobeCore provides turnkey emulsion plants that meet international specifications, enabling fast and scalable production on site or at asphalt plants.