Severe faults such as insulation breakdown, winding short, gas generation, overpressure, or arc flash can rupture tank walls. Lack of oil protection, Buchholz trip, or sudden pressure relay failure accelerates catastrophic events.

A large power transformer is generally a high voltage, high MVA unit used in transmission or major substation applications, typically tens to hundreds of MVA and voltage levels from about 69 kV up to 765 kV or more. These transformers step up generator voltage to transmission levels or step down transmission voltage to sub transmission or distribution levels. They are physically massive, oil filled, and equipped with radiators, bushings, on load tap changers and advanced monitoring. Large power transformers are critical grid assets with long lead times, complex transport logistics and high replacement cost.

Constructing a power transformer involves core design, coil winding, insulation layering, mechanical assembly, tank fabrication, oil filling and degassing, integration of bushings, tap changers, and cooling radiators. After assembly, the unit undergoes routine and type tests before deployment.

The term power factor transformer usually refers to transformers within a power factor correction system, rather than a special transformer alone. Such transformers supply capacitor banks, harmonic filters or synchronous condensers at suitable voltages while providing isolation and impedance. Their role is to enable connection of reactive compensation equipment so that the overall plant or feeder power factor improves. This reduces reactive power drawn from the grid, lowers losses and can help avoid utility penalties for low power factor.

Services include oil analysis, DGA, PD diagnostics, tan-delta, FRA, OLTC overhaul, bushing replacement, rewinding, retrofilling, rigging, and commissioning.

Power plants use generator step-up (GSU) transformers to raise generator voltage for transmission, and station service transformers to supply auxiliary loads.

Key components of the US-6S include the control cabinet, vacuum unit (e.g., BV-1000), compressor, technical oil heater, vapor condenser, condensate collection tank, furnace chamber, sliding carriage, and doors with pneumatic or motorized drives. Each part is engineered to ensure uniform drying, vacuum maintenance, and safe operation throughout the drying cycle.

Electromagnetic induction transfers AC power; the turns ratio defines voltage conversion.

Core steel grade, lamination technique, flux density, stacking pattern, insulation coatings, and geometry influence efficiency, noise, and thermal behavior.

The UVB-2 modification plant blends polymers such as SBS or crumb rubber with bitumen. It includes dosing, mixing, and homogenization systems.