{
  "id": 11,
  "title": "UN/DN/FN Resistance-Welding Transformers",
  "family": "Welding Transformers",
  "description": "Low-voltage, high-current water-cooled transformers for resistance-welding equipment.",
  "sections": [
    {
      "heading": "Overview",
      "paragraphs": [
        "UN/DN/FN series for butt-welding and seam-welding machines use precision-cut quality silicon-steel laminations. The brochure describes low losses, low no-load current, low secondary voltage, high current and adjustable welding current.",
        "Forced-water-cooled construction with single-phase 380 V supply. The brochure highlights operating reliability, welding efficiency, speed and joint strength, with reduced welding cost. Suitable for multiple materials, especially cold-rolled sheet, galvanised sheet and cold-drawn bar."
      ]
    },
    {
      "heading": "Applications",
      "paragraphs": [
        "For small and medium weldments in low-carbon and low-alloy steels, wire and stainless-steel sheet, including oil tanks, basins, cans and drums. Industries include hardware, domestic appliances, automotive, power equipment and sheet-metal manufacturing."
      ]
    },
    {
      "heading": "Customisation",
      "paragraphs": [
        "Other ratings and dimensions can be manufactured as non-standard transformers to customer requirements."
      ]
    }
  ],
  "specifications": [],
  "models": [],
  "tables": [
    {
      "caption": "Resistance-welding transformer ratings and dimensions",
      "columns": [
        "Model",
        "Power",
        "No-load voltage",
        "Frequency",
        "Duty cycle",
        "Overall dimensions (mm)",
        "Mounting dimensions (mm)"
      ],
      "rows": [
        [
          "UN",
          "40KVA",
          "4.75V",
          "50–60Hz",
          "50%",
          "305×165×340",
          "245×115"
        ],
        [
          "UN",
          "60KVA",
          "5.9V",
          "50–60Hz",
          "50%",
          "350×170×350",
          "280×120"
        ],
        [
          "UN",
          "80KVA",
          "7.5V",
          "50–60Hz",
          "50%",
          "370×200×400",
          "280×135"
        ],
        [
          "UN",
          "100KVA",
          "8.5V",
          "50–60Hz",
          "50%",
          "400×200×420",
          "305×145"
        ],
        [
          "UN",
          "150KVA",
          "10.5V",
          "50–60Hz",
          "50%",
          "420×230×460",
          "315×155"
        ],
        [
          "UN",
          "200KVA",
          "11.5V",
          "50–60Hz",
          "50%",
          "3450×240×470",
          "340×160"
        ]
      ]
    }
  ],
  "notes": [
    "The 200KVA overall dimension is printed as 3450×240×470 mm and is retained without correction. Confirm this unusually large first dimension before installation."
  ],
  "slug": "un-resistance-welding-transformers",
  "category": "industrial-transformers",
  "categoryTitle": "Industrial Transformers",
  "relatedCategories": [],
  "image": "/catalog/products/un-resistance-welding-transformers.webp",
  "href": "/products/series/un-resistance-welding-transformers",
  "pdfPage": 9,
  "side": "right",
  "sheet": "/catalog/sheets/09-right.webp",
  "sheetWidth": 1007,
  "sheetHeight": 1375
}