{"title":"Oil Type Transformers","description":"\u003cdiv\u003eOil-type transformers are a very common type of electrical transformer used in power distribution and transmission. Instead of being air-cooled, they use special insulating oil for both cooling and insulation.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eHere’s a breakdown:\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eAn oil-type transformer is a transformer where the core and windings are completely immersed in insulating oil, usually mineral oil or synthetic ester.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eThe oil serves a dual purpose:\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003eElectrical insulation – it prevents short circuits by insulating live parts.\u003c\/li\u003e\n\u003cli\u003eHeat dissipation – it absorbs heat from the windings\/core and transfers it to the transformer tank walls, which then release it into the air.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cspan style=\"text-decoration: underline;\"\u003eTypes of oil-type transformers:\u003c\/span\u003e\u003c\/div\u003e\n\u003col\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eDistribution transformers\u003c\/strong\u003e (up to ~33 kV) – found on poles, in substations, near residential areas\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003ePower transformers\u003c\/strong\u003e (above ~33 kV) – used in high-voltage networks and substations\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eHermetically sealed\u003c\/strong\u003e (no air exchange, less oil degradation)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eConservator type \u003c\/strong\u003e(oil level changes with temperature, requires a breather)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv\u003e\u003cspan style=\"text-decoration: underline;\"\u003eKey components:\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCore and windings (like any transformer)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eInsulating oil\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTank – sealed or conservator type (with an expansion chamber for oil volume changes)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRadiators or fins – to increase surface area for cooling\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBushings – insulated connections for incoming and outgoing conductors\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBreather \/ silica gel unit (on conservator type) – keeps moisture out\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cspan style=\"text-decoration: underline;\"\u003eAdvantages:\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHigh efficiency and long lifespan\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eExcellent cooling capacity → can handle higher loads than dry-type equivalents\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCost-effective for medium to very large power ratings\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cspan style=\"text-decoration: underline;\"\u003eDisadvantages:\u003c\/span\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFire risk (since mineral oil is flammable)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHeavier and less environmentally friendly than dry-type transformers\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRequires regular maintenance (oil testing, leakage checks)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eIn short: Oil-type transformers are the backbone of power distribution grids worldwide, chosen for their reliability and cooling efficiency, but they come with fire and environmental considerations.\u003c\/div\u003e","products":[{"product_id":"oil-immersed-transformers","title":"Oil Immersed Power Transformers","description":"\u003cp\u003eGANELEC supplies oil-immersed power transformers that feature a robust design where the core and windings are fully submerged in high-quality insulating oil. \u003c\/p\u003e\n\u003cp\u003eThis innovative design not only ensures superior electrical insulation but also provides effective cooling, reducing thermal stresses and enhancing overall efficiency. Ideal for demanding industrial and utility applications, these transformers offer exceptional durability, reliable performance, and a longer service life, making them a dependable choice for your power distribution needs.\u003c\/p\u003e\n\u003cp\u003eOil-immersed transformers are a vital component in electrical power distribution, where the core and windings are fully submerged in insulating oil. This design enhances performance, safety, and longevity through several key functions:\u003c\/p\u003e\n\u003ch6\u003e\u003cstrong\u003eInsulation and cooling\u003c\/strong\u003e\u003c\/h6\u003e\n\u003cp\u003eThe insulating oil provides excellent electrical insulation between the windings and absorbs heat generated during operation. Circulating within the transformer, the oil transfers heat away from the core and windings to external cooling systems or the transformer's surface, ensuring efficient thermal management.\u003c\/p\u003e\n\u003ch6\u003e\u003cstrong\u003eTypes of insulating oil\u003c\/strong\u003e\u003c\/h6\u003e\n\u003cp\u003eMineral oil is most commonly used for its effective insulating properties and thermal conductivity. Alternatives like silicone-based or synthetic hydrocarbon oils are gaining popularity due to superior fire resistance and environmental credentials.\u003c\/p\u003e\n\u003ch6\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/h6\u003e\n\u003cp\u003eConstructed with high-grade steel cores and windings made from copper or aluminum, these components are housed inside a sealed, robust tank filled with insulating oil. This encapsulation ensures durability and protection against environmental elements.\u003c\/p\u003e","brand":"YAWEI","offers":[{"title":"Default Title","offer_id":51907637903665,"sku":null,"price":0.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/5443\/6913\/files\/oil-immersed-transformer95d71.webp?v=1759843919"},{"product_id":"distribution-transformers","title":"Distribution Transformers","description":"\u003cp\u003e\u003cstrong\u003eGANELEC \u003c\/strong\u003esupplies the Sub-Saharan African market with distribution transformers.\u003c\/p\u003e\n\u003cp data-pasted=\"true\"\u003eThe GANELEC\u003cspan\u003e \u003c\/span\u003eYawei S11-S13 series distribution transformers are designed to efficiently handle voltage step-up and step-down applications within 10KV to 35KV distribution networks.\u003c\/p\u003e\n\u003cp\u003eManufactured in strict accordance with international and national standards, these transformers ensure superior quality, reliability, and performance. \u003c\/p\u003e\n\u003cp\u003eCustomisable to meet specific project requirements, we offer a variety of sizes, temperature ratings, and mounting configurations.\u003c\/p\u003e\n\u003cp\u003eCrafted with optimal magnetic topology, our distribution transformers provide robust solutions for diverse electrical distribution needs, delivering power safely and efficiently across various applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGANELEC will assist with all specifications, sizing, pricing and lead times for your project. \u003c\/strong\u003e\u003c\/p\u003e\n\u003ch6\u003e\u003cstrong\u003eS11-S13 10-35kV Transformer Features:\u003c\/strong\u003e\u003c\/h6\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEconomical and environmentally friendly with excellent performance\u003c\/strong\u003e\u003cbr\u003eThe S11-S13 series transformers deliver lower losses and currents compared to the S9 series, thanks to a continuously wound iron core with a circular cross-section. This design optimises the silicon steel sheet’s orientation, resulting in a no-load loss reduction of 20-45% and a no-load current decrease of 60-80%. The iron core remains naturally tight without clamps, ensuring stable and efficient operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLonger transformer lifespan\u003c\/strong\u003e\u003cbr\u003eThe fully sealed fuel tank, secured via bolts or welding, prevents contact between insulating oil and air. This protective design slows the aging process of insulation, significantly extending the transformer's service life.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLow noise operation\u003c\/strong\u003e\u003cbr\u003eWith a noise reduction of over 10 decibels, the seamless, compact core structure reduces operational noise by 7-10 dB. This makes the transformer ideal for installation in residential and building environments, ensuring quieter operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eReliable and secure operation\u003c\/strong\u003e\u003cbr\u003eEnhanced internal components and a secure sealing design improve overall reliability, ensuring safe and consistent performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCompact size with efficient cooling\u003c\/strong\u003e\u003cbr\u003eUtilising corrugated plate radiators, the S11 and S13 models adapt to temperature fluctuations by expanding and contracting, functioning effectively as oil conservators. This design allows for a smaller footprint without compromising cooling efficiency.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Ganelec","offers":[{"title":"Default Title","offer_id":51907668574513,"sku":null,"price":0.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0765\/5443\/6913\/files\/WhatsApp_Image_2026-03-18_at_16.07.27.jpg?v=1773920619"}],"url":"https:\/\/ganelec.co.za\/collections\/oil-type-transformers.oembed","provider":"Ganelec","version":"1.0","type":"link"}