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Power Transformer

Oil-immersed power transformer for substation and transmission

Power Transformer

Energy-saving oil-immersed type · Substations & transmission systems

Power transformers are mainly used in substations, industrial and mining enterprises, and transmission & distribution systems as equipment for electric energy transmission and voltage level conversion, supplying power to downstream electrical equipment. Their performance parameters are specified by the corresponding national standards.

  • Energy-saving design with low no-load and load losses
  • High-permeability cold-rolled grain-oriented silicon steel core
  • Autotransformer (self-coupling) types available
  • Complete protection fittings per capacity class
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Product Overview

The power transformer is the backbone of the electric power grid: it steps voltage up for economical long-distance transmission and steps it down for safe distribution to end users. Boyuan's energy-saving power transformer series adopts a core of high-permeability cold-rolled grain-oriented silicon steel with fully mitered joints, and windings of oxygen-free copper, to reduce both no-load loss and load loss over the whole service life of the unit — lowering the total cost of ownership for utilities and industrial users.

Main Components

  • Core: premium high-permeability cold-rolled grain-oriented silicon steel sheet, fully mitered step-lap joints, hole-free binding with plate-type clamps.
  • Windings: flat wire of high-quality oxygen-free copper; low-voltage windings in continuous or helical type, high-voltage windings in continuous or interleaved-continuous type with reinforced insulation at the line ends; dried as an integral body.
  • Body insulation: 30 mm laminated-wood press rings and 70 mm laminated-wood support plates strengthen main insulation and axial dynamic stability.
  • Leads & tap changers: high-quality on-load tap changer or off-circuit tap changer per rating and application.
  • Tank: barrel-type tank with fixed radiator panels up to 6,300kVA; bell-type tank with detachable radiator panels from 8,000kVA.
  • Protection fittings: pressure relief valve (≥315kVA), temperature controller (≥1,000kVA), gas relay (≥800kVA), rapid oil-pressure relay (≥8,000kVA).

Typical Applications

  • Grid substations for voltage level conversion and power transmission
  • Industrial and mining enterprise main substations
  • Urban and rural distribution networks
  • Renewable and industrial plant step-up/step-down stations

Technical Parameters (Typical Range)

TypeOil-immersed, energy-saving; autotransformer available
ApplicationSubstations, industrial & mining enterprises, transmission & distribution systems
PerformancePer the corresponding national standards for power transformers
CoreHigh-permeability cold-rolled grain-oriented silicon steel
WindingsOxygen-free copper flat wire, continuous/helical/interleaved types
Tank & coolingBarrel-type ≤6,300kVA (fixed radiators); bell-type ≥8,000kVA (detachable radiators)
StandardsNational standards; ISO 9001:2015 quality system; CE certified

Note: rated capacity, voltage ratio, impedance and connection group are configured per your network data. Contact us with your single-line diagram for a tailored offer.

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