{
  "id": 62,
  "title": "SBF Triple-frequency Test Transformers",
  "family": "Specialty & Test Transformers",
  "description": "Saturated-core frequency-triplers for induced overvoltage testing, converting 50Hz to 150Hz.",
  "sections": [
    {
      "heading": "Overview",
      "paragraphs": [
        "Magnetic saturation extracts the third harmonic, described as the largest harmonic component, to supply interturn, inter-section and interlayer increased-frequency/increased-voltage tests of inductive-winding electrical products. The purpose is to assess winding insulation strength and withstand level."
      ]
    },
    {
      "heading": "Construction and magnetic principle",
      "paragraphs": [
        "A three-core five-limb structure operates above saturation flux density. In the open-delta-connected secondary, the vector sum of fundamental-frequency positive-sequence EMFs is zero; the open terminals provide in-phase 150Hz third-harmonic zero-sequence voltage.",
        "The brochure includes three-phase frequency-tripler circuit and transformer connection diagrams."
      ]
    }
  ],
  "specifications": [
    [
      "Input",
      "Three-phase 380V, 50Hz"
    ],
    [
      "Output range 1",
      "50–500V (maximum 750V), 150Hz"
    ],
    [
      "Output range 2",
      "100–1000V (maximum 1500V), 150Hz"
    ],
    [
      "Capacity range",
      "1–1000KVA"
    ],
    [
      "Waveform",
      "Sine wave; distortion below 1[%]"
    ],
    [
      "Load types",
      "Resistive, inductive or capacitive"
    ]
  ],
  "models": [
    {
      "designation": "SBF-3/500",
      "values": [
        "380",
        "0–500",
        "3"
      ]
    },
    {
      "designation": "SBF-5/500",
      "values": [
        "380",
        "0–500",
        "5"
      ]
    },
    {
      "designation": "SBF-10/500",
      "values": [
        "380",
        "0–500",
        "10"
      ]
    },
    {
      "designation": "SBF-15/500",
      "values": [
        "380",
        "0–500",
        "15"
      ]
    },
    {
      "designation": "SBF-20/500",
      "values": [
        "380",
        "0–500",
        "20"
      ]
    },
    {
      "designation": "SBF-5/1000",
      "values": [
        "380",
        "0–1000",
        "5"
      ]
    },
    {
      "designation": "SBF-10/1000",
      "values": [
        "380",
        "0–1000",
        "10"
      ]
    },
    {
      "designation": "SBF-20/1000",
      "values": [
        "380",
        "0–1000",
        "20"
      ]
    },
    {
      "designation": "SBF-50/1000",
      "values": [
        "380",
        "0–1000",
        "50"
      ]
    }
  ],
  "tables": [
    {
      "caption": "Typical SBF model parameters",
      "columns": [
        "Model",
        "Input voltage (V)",
        "Output voltage (V)",
        "Capacity (KVA)"
      ],
      "rows": [
        [
          "SBF-3/500",
          "380",
          "0–500",
          "3"
        ],
        [
          "SBF-5/500",
          "380",
          "0–500",
          "5"
        ],
        [
          "SBF-10/500",
          "380",
          "0–500",
          "10"
        ],
        [
          "SBF-15/500",
          "380",
          "0–500",
          "15"
        ],
        [
          "SBF-20/500",
          "380",
          "0–500",
          "20"
        ],
        [
          "SBF-5/1000",
          "380",
          "0–1000",
          "5"
        ],
        [
          "SBF-10/1000",
          "380",
          "0–1000",
          "10"
        ],
        [
          "SBF-20/1000",
          "380",
          "0–1000",
          "20"
        ],
        [
          "SBF-50/1000",
          "380",
          "0–1000",
          "50"
        ]
      ]
    }
  ],
  "notes": [
    "The general output ranges begin at 50V and 100V; the model table starts at 0V. Both source statements are retained. The unusual distortion notation 1[%] is retained. This is magnetic frequency tripling, not a general electronic AC frequency converter."
  ],
  "slug": "sbf-triple-frequency-test-transformers",
  "category": "industrial-transformers",
  "categoryTitle": "Industrial Transformers",
  "relatedCategories": [],
  "image": "/catalog/products/sbf-triple-frequency-test-transformers.webp",
  "href": "/products/series/sbf-triple-frequency-test-transformers",
  "pdfPage": 32,
  "side": "left",
  "sheet": "/catalog/sheets/32-left.webp",
  "sheetWidth": 1006,
  "sheetHeight": 1375
}