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Equipment SW-101 FM breaker_fail_to_trip ISO 14224 mode M M Source engineering_estimate
断路器拒动
SW-101 · Switchgear / Circuit Breaker
Related equipment → SW-101
0.82Source conf.
—Evidence conf.
MISO 14224 mode
1Failure Mechanism

Function:故障时断开回路

Failure cause:保护动作时操动机构/脱扣线圈失效未能断开故障电流

Damage mechanism：脱扣线圈烧毁/机构卡滞致分闸失败

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 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
  • std:IEC 62271-200 — High-voltage switchgear and controlgear — Part 200: AC metal-enclosed switchgear for rated voltages >1 kV and <=52 kV · 机理级工程估计，非实测；引用 governing standard 作为分类出处
  • std:NFPA 70B — Standard for Electrical Equipment Maintenance · 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)
NUREG-LER-1997-032-INDIANPOINT3NUREG-LER-1998-002-BROWNSFERRY

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 62271-1IEC 62271-200NFPA 70B

No separate clause reference.

6Derived Analysis (seeded from this FM)
8/3/5FMEA Sev/Occ/Det
0.05RBI λ
0.8Monitor pdet
12 月Insp. int.

Current tasks:保护定值校核 | 操动机构特性测试

RCFA incident:断路器拒动：保护动作时操动机构/脱扣线圈失效未能断开故障电流，后果类型 Safety/Operational，严重度 8

7RCM Maintenance Decision (strategy landing)
PMScheduled (Proactive) Maintenance
Recommended task绝缘/电气试验 + 继电保护定值校核 + 操动机构特性测试
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=electrical
Governing standards
GB/T 14285IEC 60034IEEE C57
⚠ 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。
FM breaker_fail_to_trip · Data from OPC KB and whitelisted public sources, compiled by Reliability AI for reliability demonstration only. Evidence ref codes are internal indices, not public DOIs.