← Back to KB navigation
Equipment SW-101
FM grounding_fault
ISO 14224 mode M M
Source engineering_estimate
接地/二次回路接地不良
SW-101 · Switchgear / Circuit Breaker
Related equipment → SW-101
0.82Source conf.
—Evidence conf.
MISO 14224 mode
1Failure Mechanism
Function:安全接地
Failure cause:外壳或二次回路接地不良致电位异常
Damage mechanism：接地网腐蚀/断开
2Source Basis (where this FM comes from)
engineering_estimate
Source confidence 0.82: this FM is derived from the ontology KB and cross-validated by engineering_estimate.
3Evidence Chain (supporting basis)
This FM has no offline curated evidence text; it is derived from the ontology KB and cross-validated by the listed standard clauses and related accident investigations.
Governing standards (evidence)：std:IEC 60079-14 — Explosive atmospheres — Part 14: Electrical installations design, selection and erection · 机理级工程估计，非实测；引用 governing standard 作为分类出处std:IEC 62271-1 — High-voltage switchgear and controlgear — Part 1: Common specifications · 机理级工程估计，非实测；引用 governing standard 作为分类出处
4Related Real Accidents (traceable to accident cards)
This FM is recorded in 2 real accident investigation(s); tap the report no. to open the corresponding accident lesson card.
5Applicable Standards & Clauses
IEC 60079-14IEC 62271-1
No separate clause reference.
6Derived Analysis (seeded from this FM)
6/3/5FMEA Sev/Occ/Det
0.03RBI λ
0.8Monitor pdet
12 月Insp. int.
Current tasks:接地电阻测试
RCFA incident:接地/二次回路接地不良：外壳或二次回路接地不良致电位异常，后果类型 Safety，严重度 6
7RCM Maintenance Decision (strategy landing)
CBMOn-Condition Maintenance
Recommended task无损检测(UT/VT/MT/PT), 按 API 581 RBI 风险定级设定检验间隔; 标定/零点-跨度校验 + SIL Proof test + 阀门行程试验 + 变更管理
Suggested intervalHigh risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Decision basis机理类别=corrosion; instrument
Governing standardsAPI 570API 571API 581GB/T 21109IEC 61511ISA 84
⚠ This decision is engineering-inferred by RCM logic from the damage mechanism / root cause / failure cause — it is not derived from measured site history. Confirm with the equipment owner and process before execution.
⚠ 本卡技术正文（功能 / 致因 / 损伤机理 / RCFA 叙事）保留中文原文——依可信 AI 红线，自由技术文本不自动机翻、不编造英文译文。UI、设备类型、FM 名、ISO 码、标准号均为英文。