{
  "id": 21,
  "title": "QZB Motor-starting Autotransformers",
  "family": "Motor-starting Autotransformers",
  "description": "Autotransformers for infrequent reduced-voltage starting of three-phase squirrel-cage induction motors, reducing the effect of starting on the supply network.",
  "sections": [
    {
      "heading": "Application",
      "paragraphs": [
        "For AC 50 Hz, rated voltage 380 V and motor power 14 kW–300 kW."
      ]
    },
    {
      "heading": "Model designation",
      "paragraphs": [
        "Q: reduced-voltage starting; Z: autotransformer; B: transformer; suffix: power of the controlled motor."
      ]
    }
  ],
  "specifications": [
    [
      "Supply frequency",
      "50 Hz"
    ],
    [
      "Rated voltage",
      "380 V"
    ],
    [
      "Controlled motor power",
      "14–300 kW"
    ]
  ],
  "models": [
    {
      "designation": "QZB-14",
      "values": [
        "14",
        "30",
        "28"
      ]
    },
    {
      "designation": "QZB-20",
      "values": [
        "20",
        "30",
        "40"
      ]
    },
    {
      "designation": "QZB-28",
      "values": [
        "28",
        "30",
        "56"
      ]
    },
    {
      "designation": "QZB-30",
      "values": [
        "30",
        "30",
        "59"
      ]
    },
    {
      "designation": "QZB-40",
      "values": [
        "40",
        "30",
        "80"
      ]
    },
    {
      "designation": "QZB-55",
      "values": [
        "55",
        "30",
        "110"
      ]
    },
    {
      "designation": "QZB-75",
      "values": [
        "75",
        "30",
        "142"
      ]
    },
    {
      "designation": "QZB-115",
      "values": [
        "115",
        "50",
        "230"
      ]
    },
    {
      "designation": "QZB-135",
      "values": [
        "135",
        "50",
        "270"
      ]
    },
    {
      "designation": "QZB-190",
      "values": [
        "190",
        "70",
        "370"
      ]
    },
    {
      "designation": "QZB-225",
      "values": [
        "225",
        "70",
        "410"
      ]
    },
    {
      "designation": "QZB-260",
      "values": [
        "260",
        "70",
        "475"
      ]
    },
    {
      "designation": "QZB-300",
      "values": [
        "300",
        "70",
        "535"
      ]
    },
    {
      "designation": "QZB-14",
      "values": [
        "230",
        "115",
        "12×20",
        "280",
        "144",
        "226"
      ]
    },
    {
      "designation": "QZB-17",
      "values": [
        "230",
        "115",
        "12×20",
        "280",
        "144",
        "226"
      ]
    },
    {
      "designation": "QZB-20",
      "values": [
        "272",
        "105",
        "8×20",
        "279",
        "138",
        "229"
      ]
    },
    {
      "designation": "QZB-22",
      "values": [
        "242",
        "115",
        "8×20",
        "179",
        "138",
        "229"
      ]
    },
    {
      "designation": "QZB-28",
      "values": [
        "284",
        "113",
        "9×20",
        "321",
        "153",
        "261"
      ]
    },
    {
      "designation": "QZB-30",
      "values": [
        "284",
        "113",
        "9×20",
        "321",
        "153",
        "261"
      ]
    },
    {
      "designation": "QZB-40",
      "values": [
        "270",
        "128",
        "12×40",
        "371",
        "168",
        "282"
      ]
    },
    {
      "designation": "QZB-45",
      "values": [
        "270",
        "128",
        "10×48",
        "371",
        "168",
        "282"
      ]
    },
    {
      "designation": "QZB-55",
      "values": [
        "248",
        "132",
        "Φ14",
        "352",
        "163",
        "280"
      ]
    },
    {
      "designation": "QZB-75",
      "values": [
        "246",
        "125",
        "Φ14",
        "371",
        "164",
        "295"
      ]
    },
    {
      "designation": "QZB-115",
      "values": [
        "312",
        "161",
        "12×18",
        "392",
        "203",
        "315"
      ]
    },
    {
      "designation": "QZB-135",
      "values": [
        "310",
        "168",
        "12×18",
        "391",
        "207",
        "314"
      ]
    }
  ],
  "tables": [
    {
      "caption": "Main technical characteristics",
      "columns": [
        "Model",
        "Controlled motor power (kW)",
        "Maximum starting time (s)",
        "Maximum operating current (A)"
      ],
      "rows": [
        [
          "QZB-14",
          "14",
          "30",
          "28"
        ],
        [
          "QZB-20",
          "20",
          "30",
          "40"
        ],
        [
          "QZB-28",
          "28",
          "30",
          "56"
        ],
        [
          "QZB-30",
          "30",
          "30",
          "59"
        ],
        [
          "QZB-40",
          "40",
          "30",
          "80"
        ],
        [
          "QZB-55",
          "55",
          "30",
          "110"
        ],
        [
          "QZB-75",
          "75",
          "30",
          "142"
        ],
        [
          "QZB-115",
          "115",
          "50",
          "230"
        ],
        [
          "QZB-135",
          "135",
          "50",
          "270"
        ],
        [
          "QZB-190",
          "190",
          "70",
          "370"
        ],
        [
          "QZB-225",
          "225",
          "70",
          "410"
        ],
        [
          "QZB-260",
          "260",
          "70",
          "475"
        ],
        [
          "QZB-300",
          "300",
          "70",
          "535"
        ]
      ]
    },
    {
      "caption": "Overall and mounting dimensions",
      "columns": [
        "Model",
        "Mounting A (mm)",
        "Mounting C (mm)",
        "Mounting hole K×J (mm)",
        "Overall A (mm)",
        "Overall D (mm)",
        "Overall E (mm)"
      ],
      "rows": [
        [
          "QZB-14",
          "230",
          "115",
          "12×20",
          "280",
          "144",
          "226"
        ],
        [
          "QZB-17",
          "230",
          "115",
          "12×20",
          "280",
          "144",
          "226"
        ],
        [
          "QZB-20",
          "272",
          "105",
          "8×20",
          "279",
          "138",
          "229"
        ],
        [
          "QZB-22",
          "242",
          "115",
          "8×20",
          "179",
          "138",
          "229"
        ],
        [
          "QZB-28",
          "284",
          "113",
          "9×20",
          "321",
          "153",
          "261"
        ],
        [
          "QZB-30",
          "284",
          "113",
          "9×20",
          "321",
          "153",
          "261"
        ],
        [
          "QZB-40",
          "270",
          "128",
          "12×40",
          "371",
          "168",
          "282"
        ],
        [
          "QZB-45",
          "270",
          "128",
          "10×48",
          "371",
          "168",
          "282"
        ],
        [
          "QZB-55",
          "248",
          "132",
          "Φ14",
          "352",
          "163",
          "280"
        ],
        [
          "QZB-75",
          "246",
          "125",
          "Φ14",
          "371",
          "164",
          "295"
        ],
        [
          "QZB-115",
          "312",
          "161",
          "12×18",
          "392",
          "203",
          "315"
        ],
        [
          "QZB-135",
          "310",
          "168",
          "12×18",
          "391",
          "207",
          "314"
        ]
      ]
    }
  ],
  "notes": [
    "Motor power values are kW, not transformer kVA. The dimension table labels both mounting and overall dimensions A; both original labels are retained. QZB-22 overall A is printed as 179 mm."
  ],
  "slug": "qzb-motor-starting-autotransformers",
  "category": "industrial-transformers",
  "categoryTitle": "Industrial Transformers",
  "relatedCategories": [],
  "image": "/catalog/products/qzb-motor-starting-autotransformers.webp",
  "href": "/products/series/qzb-motor-starting-autotransformers",
  "pdfPage": 14,
  "side": "left",
  "sheet": "/catalog/sheets/14-left.webp",
  "sheetWidth": 1006,
  "sheetHeight": 1375
}