VR2R-0500_r1

VR2R-0500

① SA Source

• Source: 開啟完整 SA 文章
• Section: Rack Level Infrastructure: Power Delivery
• Line hint: 412

Context Before

The power shelves step down the power from 415VAC-480VAC to 50VDC and sends it to the busbar.

Evidence

Interestingly, the busbar of VR NVL72 is rated for 5000A+, which is much higher than that of Grace Blackwell at 2900A.

Context After

Given the extremely high current and the lack of fans in the rack, the busbar has to be liquid cooled.

② Atomic Claim

VR NVL72 的 busbar rated current 為 5,000A+，明顯高於 Grace Blackwell 的 2,900A。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "comparison_expression": "VR NVL72 busbar is rated at 5000A+ versus 2900A for Grace Blackwell.",
  "entities": [
    {
      "id": "04_knowledge_base/VR NVL72",
      "label": "VR NVL72"
    },
    {
      "id": "04_knowledge_base/Busbar",
      "label": "busbar"
    },
    {
      "id": "04_knowledge_base/NVIDIA Grace",
      "label": "Grace"
    },
    {
      "id": "04_knowledge_base/Blackwell",
      "label": "Blackwell"
    }
  ],
  "frame_type": "COMPARISON",
  "metric": "BUSBAR_CURRENT_RATING",
  "operator": "GREATER_THAN",
  "qualifiers": {
    "condition_text": null,
    "numeric_mentions": [
      "5000A+",
      "2900A"
    ],
    "temporal_mentions": []
  }
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
entity	VR NVL72	04_knowledge_base/VR NVL72
entity	busbar	Busbar
entity	Grace	04_knowledge_base/NVIDIA Grace
entity	Blackwell	Blackwell

⑤ Human Review

請在 Properties 逐項確認：

• 原文 → Atomic Claim 是否忠實
• Atomic Claim → Semantic Frame 是否忠實
• Canonical Entity mapping 是否正確
• Epistemic mode 是否保留原文語氣
• 最後選擇 review_action

Review state

Markdown 內文不是正式 approval。只有 Apply bridge 寫入的 Decision Ledger event 才是正式決策。