{
  "edition": "2026-11-07",
  "id": "jrk-821",
  "locale": "de",
  "url": "https://senroam.com/de/trains/jrk-821/",
  "name": "821 · Kagoshima-Hauptlinie · 鹿児島本線",
  "summary": "821 · Kagoshima-Hauptlinie · 鹿児島本線 · Die ersten 821 gingen im März 2019 zwischen Kokura und Arao in Betrieb. Ihre SiC-Traktionsausrüstung ist ein Unterschied, den du vom Bahnsteig aus nicht erkennen kannst.",
  "type": "train",
  "questions": [],
  "sources": [
    {
      "url": "https://www.jrkyushu.co.jp/company/ir/library/greenbond/pdf/241218_8th_greenbond_reporting_jp.pdf",
      "checked": "2026-11-07",
      "lang": "ja"
    }
  ],
  "detail": "Die ersten 821 gingen im März 2019 zwischen Kokura und Arao in Betrieb. Ihre SiC-Traktionsausrüstung ist ein Unterschied, den du vom Bahnsteig aus nicht erkennen kannst.",
  "technical": {
    "record": [
      [
        "821 · 2024-03",
        3,
        [
          "SiC main circuit",
          "SiC主回路システム"
        ],
        "821"
      ]
    ],
    "sources": [
      {
        "id": "813",
        "title": "813系電車ロングシート化します",
        "publisher": "JR九州",
        "url": "https://www.jrkyushu.co.jp/news/__icsFiles/afieldfile/2023/11/30/231130_813_long-seat.pdf",
        "source_language": "ja",
        "effective_date": "2023-11-30",
        "locator": "§1",
        "supports": "Converted three-car set; 120 longitudinal and 28 box seats.",
        "checked": "2026-11-07",
        "rights": "Consulted for facts. No source text or artwork redistributed."
      },
      {
        "id": "815",
        "title": "社会・産業・家庭",
        "publisher": "日立評論",
        "url": "https://www.hitachihyoron.com/jp/pdf/2000/01/2000_01_06.pdf",
        "source_language": "ja",
        "effective_date": "2000-01",
        "locator": "九州旅客鉄道株式会社納め815系電車",
        "supports": "A-train, FSW aluminium double-skin body, IGBT equipment; delivered June–September 1999.",
        "checked": "2026-11-07",
        "rights": "Consulted for facts. No source text or artwork redistributed."
      },
      {
        "id": "817",
        "title": "最近の鉄道車両 A-train",
        "publisher": "日立評論",
        "url": "https://www.hitachihyoron.com/jp/pdf/2003/08/2003_08_02.pdf",
        "source_language": "ja",
        "effective_date": "2003-08",
        "locator": "Opening figure, 817系電車",
        "supports": "817 belongs to the A-train aluminium vehicle system.",
        "checked": "2026-11-07",
        "rights": "Consulted for facts. No source text or artwork redistributed."
      },
      {
        "id": "821",
        "title": "第8回グリーンボンド レポーティング",
        "publisher": "JR九州",
        "url": "https://www.jrkyushu.co.jp/company/ir/library/greenbond/pdf/241218_8th_greenbond_reporting_jp.pdf",
        "source_language": "ja",
        "effective_date": "2024-03-31",
        "locator": "821系車両新製",
        "supports": "SiC main circuit; March 2019 service entry Kokura–Arao.",
        "checked": "2026-11-07",
        "rights": "Consulted for facts. No source text or artwork redistributed."
      },
      {
        "id": "701",
        "title": "701系",
        "publisher": "JR東日本",
        "url": "https://www.jreast.co.jp/train/local/701.html",
        "source_language": "ja",
        "effective_date": null,
        "locator": "車両紹介",
        "supports": "AC train; standard-gauge variants for mini-Shinkansen corridors.",
        "checked": "2026-11-07",
        "rights": "Consulted for facts. No source text or artwork redistributed."
      },
      {
        "id": "e127",
        "title": "E127系",
        "publisher": "JR東日本",
        "url": "https://www.jreast.co.jp/train/local/e127.html",
        "source_language": "ja",
        "effective_date": null,
        "locator": "車両紹介",
        "supports": "Two-car minimum; three doors per side; semi-automatic door operation.",
        "checked": "2026-11-07",
        "rights": "Consulted for facts. No source text or artwork redistributed."
      },
      {
        "id": "e129",
        "title": "E129系",
        "publisher": "JR東日本",
        "url": "https://www.jreast.co.jp/train/local/e129.html",
        "source_language": "ja",
        "effective_date": null,
        "locator": "基本情報・車両紹介",
        "supports": "DC; 110 km/h; E233 technology.",
        "checked": "2026-11-07",
        "rights": "Consulted for facts. No source text or artwork redistributed."
      },
      {
        "id": "e131",
        "title": "相模線E131系車両の概要",
        "publisher": "JR東日本",
        "url": "https://www.jreast.co.jp/press/2021/yokohama/20210917_y1.pdf",
        "source_language": "ja",
        "effective_date": "2021-09-17",
        "locator": "別紙2 comparison table",
        "supports": "Sagami 4 cars 2M2T; Boso/Kashima 2 cars 1M1T; 2950 mm; stainless steel; 110 km/h; SiC VVVF, enclosed induction motors.",
        "checked": "2026-11-07",
        "rights": "Consulted for facts. No source text or artwork redistributed."
      },
      {
        "id": "e721",
        "title": "E721系",
        "publisher": "JR東日本",
        "url": "https://www.jreast.co.jp/train/local/e721.html",
        "source_language": "ja",
        "effective_date": null,
        "locator": "基本情報・車両紹介",
        "supports": "120 km/h; 0,500,1000 subseries, lower passenger floor.",
        "checked": "2026-11-07",
        "rights": "Consulted for facts. No source text or artwork redistributed."
      },
      {
        "id": "ginza",
        "title": "東京メトロ 銀座線1000系 主要諸元",
        "publisher": "東京メトロ",
        "url": "https://www.tokyometro.jp/corporate/enterprise/passenger_rail/cars/working/ginza_1000/pdf/specifications.pdf",
        "source_language": "ja",
        "effective_date": "2023-03-31",
        "locator": "p.1, specification table",
        "supports": "Six cars; 16000 ×2598 ×3465 mm; PMSM, VVVF; 80 km/h design speed; 3.3 km/h/s acceleration.",
        "checked": "2026-11-07",
        "rights": "Consulted for facts. No source text or artwork redistributed."
      },
      {
        "id": "tram",
        "title": "フォトギャラリー",
        "publisher": "鹿児島市交通局",
        "url": "https://www.kotsu-city-kagoshima.jp/cust-photo/",
        "source_language": "ja",
        "effective_date": null,
        "locator": "1000形・7500形 vehicle specification tables",
        "supports": "7501–7504 dimensions and motor rating; 1011 dimensions.",
        "checked": "2026-11-07",
        "rights": "Consulted for facts. No source text or artwork redistributed."
      }
    ]
  },
  "engineering": {
    "record": {
      "scope": {
        "en": "821-series introduction-era equipment and operator comparison.",
        "ja": "821系導入時の機器・事業者比較。"
      },
      "facts": [
        {
          "label": {
            "en": "Main-circuit supplier",
            "ja": "主回路の製造者"
          },
          "value": {
            "en": "Mitsubishi supplied the main transformer, converter and traction motors.",
            "ja": "三菱電機が主変圧器・主変換装置・主電動機を供給。"
          },
          "sources": [
            "regional:reg-821-mitsubishi"
          ]
        },
        {
          "label": {
            "en": "Energy benchmark",
            "ja": "消費電力量の比較"
          },
          "value": {
            "en": "JR Kyushu reported about 70% less electricity than the 415 series.",
            "ja": "JR九州は415系比で消費電力量約70%減と説明。"
          },
          "sources": [
            "regional:reg-821-environment"
          ]
        },
        {
          "label": {
            "en": "Reliability priorities",
            "ja": "信頼性向上の対象"
          },
          "value": {
            "en": "The operator identifies both the main converter (CI) and auxiliary supply (SIV).",
            "ja": "事業者は主変換装置CIと補助電源装置SIVの信頼性向上を挙げる。"
          },
          "sources": [
            "regional:reg-821-environment"
          ]
        }
      ],
      "insights": [
        {
          "title": {
            "en": "A system comparison",
            "ja": "車両システムとしての比較"
          },
          "text": {
            "en": "The 70% figure compares train generations, not the SiC semiconductor alone; the manufacturer describes compact, efficient main-circuit equipment.",
            "ja": "約70%は世代の異なる車両の比較であり、SiC素子だけの効果ではない。メーカーは主回路全体の高効率・小型化を説明している。"
          },
          "sources": [
            "regional:reg-821-environment",
            "regional:reg-821-mitsubishi"
          ]
        }
      ],
      "gaps": [
        "Exact motor model, per-motor rating and circuit redundancy topology not independently established here."
      ]
    },
    "sources": {
      "regional:reg-821-mitsubishi": {
        "title": "九州旅客鉄道株式会社様 SiC適用鉄道車両用主回路システム",
        "publisher": "三菱電機",
        "url": "https://www.mitsubishielectric.co.jp/business/area/kyusyu/installations/detail32.html",
        "date": null,
        "language": "ja",
        "locator": "導入の経緯・ソリューション",
        "checked": "2026-11-07"
      },
      "regional:reg-821-environment": {
        "title": "JR九州環境報告2018：九州を走る省エネ型車両",
        "publisher": "JR九州",
        "url": "https://www.jrkyushu.co.jp/company/esg/environment/report/effort3.html",
        "date": "2018",
        "language": "ja",
        "locator": "821系",
        "checked": "2026-11-07"
      }
    },
    "checked": "2026-11-07"
  },
  "literature": []
}