{
  "metadata": {
    "dataset_key": "jddg-2025-v9.0",
    "dataset_revision": "0.23",
    "topic_slug": "surge-protection",
    "topic_label_ja": "サージ保護",
    "topic_label_en": "Surge Protection",
    "requirement_count": 8,
    "summary_layer_version": "1.1",
    "terminology_policy_version": "1.1",
    "display_text_revision": "1.1"
  },
  "description_ja": "サージ保護に関係するJDDG要件を、設計上の確認項目ごとに分類しています。",
  "focus_items_ja": [
    "サージ保護デバイス",
    "雷サージ",
    "過電圧保護",
    "設置位置・接続",
    "接地との連携"
  ],
  "related_terms": [],
  "requirements": [
    {
      "requirement_id": "JDDG25-14.10.1.1-R01",
      "section": "14.10.1.1",
      "title_ja": "中電圧配電",
      "title_en": "MEDIUM VOLTAGE DISTRIBUTION",
      "summary_ja": "日本本土の一般的な中電圧配電では、ケーブルおよび関連付属品を6.6 kV定格で指定し、避雷器はより低い系統電圧に合わせて選定することを求めています。",
      "source_fact_en": "For mainland Japan, 6.6 kV-rated cables and related accessories are to be specified for typical medium-voltage distribution, except surge arresters are sized to the lower system voltage.",
      "strength": "mandatory",
      "strength_ja": "必須",
      "applicable_phases": [
        "design"
      ],
      "quality_flag": "normal",
      "url": "https://www.ieee802.co.jp/jddg/2025/requirements/JDDG25-14.10.1.1-R01/"
    },
    {
      "requirement_id": "JDDG25-14.10.8.1-R01",
      "section": "14.10.8.1",
      "title_ja": "中電圧―過電圧保護",
      "title_en": "MEDIUM VOLTAGE – OVERVOLTAGE PROTECTION",
      "summary_ja": "推奨する避雷器構成として、パッドマウント変圧器には配電級MOV避雷器、架空から地中への移行柱には中間級避雷器を使用するとしています。",
      "source_fact_en": "The preferred surge-arrester arrangement is distribution-class MOV arresters at pad-mounted transformers and intermediate-class arresters at overhead-to-underground transition poles.",
      "strength": "preference",
      "strength_ja": "優先",
      "applicable_phases": [
        "design"
      ],
      "quality_flag": "normal",
      "url": "https://www.ieee802.co.jp/jddg/2025/requirements/JDDG25-14.10.8.1-R01/"
    },
    {
      "requirement_id": "JDDG25-14.10.8.1-R02",
      "section": "14.10.8.1",
      "title_ja": "中電圧―過電圧保護",
      "title_en": "MEDIUM VOLTAGE – OVERVOLTAGE PROTECTION",
      "summary_ja": "避雷器の定格を図面に明示することを求めています。",
      "source_fact_en": "Surge-arrester sizes are to be shown on the plans.",
      "strength": "mandatory",
      "strength_ja": "必須",
      "applicable_phases": [
        "design"
      ],
      "quality_flag": "normal",
      "url": "https://www.ieee802.co.jp/jddg/2025/requirements/JDDG25-14.10.8.1-R02/"
    },
    {
      "requirement_id": "JDDG25-14.12.1.5-R01",
      "section": "14.12.1.5",
      "title_ja": "電気系統の雷保護",
      "title_en": "LIGHTNING PROTECTION FOR ELECTRICAL SYSTEMS",
      "summary_ja": "電気設備の雷・サージ保護は、適切な接地と組み合わせた避雷器またはサージ抑制器によって行うのが一般的であると示しています。",
      "source_fact_en": "Lightning/surge protection is generally achieved with surge arresters or suppressors together with proper grounding.",
      "strength": "guidance",
      "strength_ja": "指針",
      "applicable_phases": [
        "design"
      ],
      "quality_flag": "normal",
      "url": "https://www.ieee802.co.jp/jddg/2025/requirements/JDDG25-14.12.1.5-R01/"
    },
    {
      "requirement_id": "JDDG25-14.12.1.5-R02",
      "section": "14.12.1.5",
      "title_ja": "電気系統の雷保護",
      "title_en": "LIGHTNING PROTECTION FOR ELECTRICAL SYSTEMS",
      "summary_ja": "電位上昇、二次放電、代替接地経路を抑えるため、接地までの経路をできるだけ短く直線的にすることを推奨しています。",
      "source_fact_en": "The path to ground should be as short and straight as possible to reduce voltage buildup, secondary flash, and alternate ground paths.",
      "strength": "recommended",
      "strength_ja": "推奨",
      "applicable_phases": [
        "design",
        "installation"
      ],
      "quality_flag": "normal",
      "url": "https://www.ieee802.co.jp/jddg/2025/requirements/JDDG25-14.12.1.5-R02/"
    },
    {
      "requirement_id": "JDDG25-14.12.2.2-R07",
      "section": "14.12.2.2",
      "title_ja": "変圧器接地",
      "title_en": "TRANSFORMER GROUNDING",
      "summary_ja": "避雷器からの接地導体と、変圧器中性点・外箱からの接地導体を別々に敷設することを求めています。",
      "source_fact_en": "Separate conductors are to be extended from arresters and from the transformer neutral/housing.",
      "strength": "mandatory",
      "strength_ja": "必須",
      "applicable_phases": [
        "design",
        "installation"
      ],
      "quality_flag": "normal",
      "url": "https://www.ieee802.co.jp/jddg/2025/requirements/JDDG25-14.12.2.2-R07/"
    },
    {
      "requirement_id": "JDDG25-14.12.2.3-R01",
      "section": "14.12.2.3",
      "title_ja": "雷・サージ保護",
      "title_en": "LIGHTNING AND SURGE PROTECTION",
      "summary_ja": "雷または電圧サージの影響を受ける施設・機器には、接地へ直接接続する低インピーダンス導体を設けることを求めています。",
      "source_fact_en": "Facilities and equipment subject to lightning or voltage surges require low-impedance conductors connected directly to ground.",
      "strength": "mandatory",
      "strength_ja": "必須",
      "applicable_phases": [
        "design",
        "installation"
      ],
      "quality_flag": "normal",
      "url": "https://www.ieee802.co.jp/jddg/2025/requirements/JDDG25-14.12.2.3-R01/"
    },
    {
      "requirement_id": "JDDG25-14.12.2.3-R02",
      "section": "14.12.2.3",
      "title_ja": "雷・サージ保護",
      "title_en": "LIGHTNING AND SURGE PROTECTION",
      "summary_ja": "他システムの接地極から7.5 m以内にある接地極は、地中で相互接続することを求めています。",
      "source_fact_en": "Ground electrodes within 7.5 m of electrodes belonging to other systems must be interconnected below grade.",
      "strength": "mandatory",
      "strength_ja": "必須",
      "applicable_phases": [
        "design",
        "installation"
      ],
      "quality_flag": "normal",
      "url": "https://www.ieee802.co.jp/jddg/2025/requirements/JDDG25-14.12.2.3-R02/"
    }
  ]
}