{
  "id": 31,
  "title": "TND Single-phase Automatic Voltage Stabilizers",
  "family": "Automatic AC Voltage Stabilizers",
  "description": "Servo-controlled high-precision automatic AC voltage stabilizers for office, test, medical, automation and domestic equipment.",
  "sections": [
    {
      "heading": "Overview",
      "paragraphs": [
        "A contact-type variable autotransformer, servo motor and automatic control circuit continuously stabilize the supply. When mains voltage or load changes, a sampling/control circuit drives the servo motor to reposition the carbon brush and bring output voltage back to its rated value.",
        "The text describes TND and TNS as updated products based on the SVC AC voltage-stabilizer series; the page heading and dimensional table are for TND single-phase units. Brochure describes an attractive exterior and economical design."
      ]
    },
    {
      "heading": "Applications",
      "paragraphs": [
        "Office equipment, test equipment, medical equipment, industrial automation equipment, household appliances, lighting systems and communications systems."
      ]
    }
  ],
  "specifications": [
    [
      "Input voltage",
      "Single-phase 160–250 V; three-phase 277–430 V, 3-phase 4-wire"
    ],
    [
      "Output voltage",
      "Single-phase 220 V and 110 V; three-phase line 380 V, phase 220 V"
    ],
    [
      "Voltage regulation accuracy",
      "Phase voltage 220 V ±3% and 110 V ±2%"
    ],
    [
      "Frequency",
      "50/60 Hz"
    ],
    [
      "Adjustment time",
      "<1 s for a 10% input-voltage change"
    ],
    [
      "Efficiency",
      ">90%"
    ],
    [
      "Overvoltage protection",
      "246 V ±4 V"
    ],
    [
      "Ambient temperature",
      "−10 to +40°C"
    ],
    [
      "Relative humidity",
      "<95%"
    ],
    [
      "Temperature rise",
      "<60°C"
    ],
    [
      "Waveform distortion",
      "No additional waveform distortion"
    ],
    [
      "Load power factor",
      "0.8"
    ],
    [
      "Dielectric withstand",
      "1500 VAC / 1 min, no flashover or breakdown"
    ],
    [
      "Insulation resistance",
      "Complete unit to earth >5 MΩ"
    ]
  ],
  "models": [
    {
      "designation": "TND-0.5",
      "values": [
        "Single-phase",
        "172×190×126"
      ]
    },
    {
      "designation": "TND-1",
      "values": [
        "Single-phase",
        "220×208×114"
      ]
    },
    {
      "designation": "TND-2",
      "values": [
        "Single-phase",
        "286×223×218"
      ]
    },
    {
      "designation": "TND-3",
      "values": [
        "Single-phase",
        "305×223×218"
      ]
    },
    {
      "designation": "TND-5",
      "values": [
        "Single-phase",
        "305×220×271"
      ]
    },
    {
      "designation": "TND-10",
      "values": [
        "Single-phase",
        "310×330×500"
      ]
    },
    {
      "designation": "TND-15",
      "values": [
        "Single-phase",
        "360×380×600"
      ]
    },
    {
      "designation": "TND-20",
      "values": [
        "Single-phase",
        "360×380×601"
      ]
    }
  ],
  "tables": [
    {
      "caption": "Overall dimensions",
      "columns": [
        "Model / rating (kVA)",
        "Phase arrangement",
        "Depth×width×height (mm)"
      ],
      "rows": [
        [
          "TND-0.5",
          "Single-phase",
          "172×190×126"
        ],
        [
          "TND-1",
          "Single-phase",
          "220×208×114"
        ],
        [
          "TND-2",
          "Single-phase",
          "286×223×218"
        ],
        [
          "TND-3",
          "Single-phase",
          "305×223×218"
        ],
        [
          "TND-5",
          "Single-phase",
          "305×220×271"
        ],
        [
          "TND-10",
          "Single-phase",
          "310×330×500"
        ],
        [
          "TND-15",
          "Single-phase",
          "360×380×600"
        ],
        [
          "TND-20",
          "Single-phase",
          "360×380×601"
        ]
      ]
    }
  ],
  "notes": [
    "Ultra-low-voltage units with 135–240 V input can be customized. The original TND-20 height is 601 mm and is retained. Mixed single/three-phase statements are retained from the source specification table."
  ],
  "slug": "tnd-single-phase-voltage-stabilizers",
  "category": "voltage-regulators",
  "categoryTitle": "Voltage Stabilizers",
  "relatedCategories": [],
  "image": "/catalog/products/tnd-single-phase-voltage-stabilizers.webp",
  "href": "/products/series/tnd-single-phase-voltage-stabilizers",
  "pdfPage": 18,
  "side": "right",
  "sheet": "/catalog/sheets/18-right.webp",
  "sheetWidth": 1007,
  "sheetHeight": 1375
}