"Tan Delta test" meaning in English

{
  "forms": [
    {
      "form": "Tan Delta tests",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "Tan Delta test"
      },
      "expansion": "Tan Delta test (plural Tan Delta tests)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Electrical engineering",
          "orig": "en:Electrical engineering",
          "parents": [
            "Electricity",
            "Engineering",
            "Electromagnetism",
            "Applied sciences",
            "Technology",
            "Physics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A test to measure the degree of deterioration of an electrical insulation which is performed at two temperature by applying AC voltage to the test object and measure the total current flow through it, and separating and comparing the reactive and resistance portions of the current passing through it."
      ],
      "id": "en-Tan_Delta_test-en-noun-EVh5tSBx",
      "links": [
        [
          "deterioration",
          "deterioration"
        ],
        [
          "insulation",
          "insulation"
        ],
        [
          "AC",
          "alternating current"
        ],
        [
          "voltage",
          "voltage"
        ]
      ]
    }
  ],
  "word": "Tan Delta test"
}

{
  "forms": [
    {
      "form": "Tan Delta tests",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "Tan Delta test"
      },
      "expansion": "Tan Delta test (plural Tan Delta tests)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "en:Electrical engineering"
      ],
      "glosses": [
        "A test to measure the degree of deterioration of an electrical insulation which is performed at two temperature by applying AC voltage to the test object and measure the total current flow through it, and separating and comparing the reactive and resistance portions of the current passing through it."
      ],
      "links": [
        [
          "deterioration",
          "deterioration"
        ],
        [
          "insulation",
          "insulation"
        ],
        [
          "AC",
          "alternating current"
        ],
        [
          "voltage",
          "voltage"
        ]
      ]
    }
  ],
  "word": "Tan Delta test"
}