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 "title": "11/33kV to 400/415V Outdoor Three-Phase Oil-Immersed Power Transformer (15kVA–31500kVA)",
 "category": "oil-immersed-transformer",
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 "overview": "An outdoor three-phase oil-immersed power transformer stepping 11 / 33 kV down to 400 / 415 V, available across a wide 15 kVA–31500 kVA capacity range. Silicon-steel core with copper or aluminium windings. The corrugated-fin sealed tank eliminates oil oxidation and topping-up, giving a long, maintenance-light service life of 20–30 years for outdoor and substation power distribution. Copper or aluminium windings, built to IEC and GB standards.",
 "sellingPoints": [
  "Fully sealed corrugated-fin tank — no oil oxidation, no breathing, minimal maintenance",
  "Low no-load loss and low running temperature for high efficiency",
  "20–30 year service life, robust for harsh outdoor environments",
  "Wide capacity and voltage range, customizable vector group",
  "Certified to IEC, CE, ISO9001/14001/45001, CQC, GOST, EAC"
 ],
 "specs": [
  [
   "Product Type",
   "Three-Phase Oil-Immersed Distribution Transformer"
  ],
  [
   "Rated Capacity",
   "15 kVA – 31500 kVA"
  ],
  [
   "Input Voltage",
   "11 / 33 kV"
  ],
  [
   "Output Voltage",
   "400 / 415 V"
  ],
  [
   "Frequency",
   "50 / 60 Hz"
  ],
  [
   "Phase",
   "Three"
  ],
  [
   "Winding Material",
   "Copper / Aluminium"
  ],
  [
   "Coil Structure",
   "Fully Sealed Construction"
  ],
  [
   "Vector Group",
   "Dyn11 / Yyn0 / Yd11 / YNd11 / Dyn5"
  ],
  [
   "Service Life",
   "20–30 Years"
  ],
  [
   "Standard",
   "IEC / GB"
  ],
  [
   "Certification",
   "IEC, CE, ISO9001, ISO14001, ISO45001, CQC, GOST, EAC"
  ],
  [
   "Packing",
   "Wooden Case"
  ],
  [
   "Package Size",
   "280 × 200 × 250 cm"
  ],
  [
   "Gross Weight",
   "5400 kg"
  ]
 ],
 "applications": "Outdoor and indoor power distribution for utilities, industrial plants, mining, oil fields, commercial complexes and rural electrification networks requiring reliable step-down from medium voltage.",
 "customisation": "Capacity, voltage ratio, vector group, winding material (copper/aluminium), tap changer (off-load / on-load) and bushing configuration are customizable to project requirements.",
 "faq": [
  {
   "q": "What is the rated capacity of the 11/33kV to 400/415V Outdoor Three-Phase Oil-Immersed Power Transformer (15kVA–31500kVA)?",
   "a": "The standard configuration is rated 15 kVA – 31500 kVA at 50 / 60 Hz. Other ratings in the same family can be built to order — tell us the load and we will confirm the nearest standard rating."
  },
  {
   "q": "What voltage ratio is available?",
   "a": "The standard unit is 11 / 33 kV input to 400 / 415 V output. Voltage ratio, tapping range and vector group can be adjusted to your network; 50 Hz and 60 Hz designs are available."
  },
  {
   "q": "Which standards and certifications apply?",
   "a": "The product is designed to IEC / GB. MARS operates an ISO 9001 / 14001 / 45001 certified factory and holds CE (ECM), UDEM, EAC and CQC approvals; every unit is routine-tested before dispatch and type or witnessed tests can be arranged."
  },
  {
   "q": "Can this product be customised?",
   "a": "Capacity, voltage ratio, vector group, winding material (copper/aluminium), tap changer (off-load / on-load) and bushing configuration are customizable to project requirements."
  },
  {
   "q": "What is the lead time and how is it shipped?",
   "a": "Packed in wooden case. Typical lead time is 25–45 days after drawing approval for distribution equipment and 60–90 days for power transformers and containerised systems. Shipment is by sea from Shanghai on EXW, FOB, CIF or DAP terms with a full document pack."
  }
 ],
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 "manufacturer": "Shanghai Mars Electric Power Equipment Co., Ltd.",
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