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Equipment SW-101
FM ct_pt_failure
ISO 14224 mode M M
Source engineering_estimate
电流互感器/电压互感器故障
SW-101 · Switchgear / Circuit Breaker
Related equipment → SW-101
0.82Source conf.
—Evidence conf.
MISO 14224 mode
1Failure Mechanism
Function:测量与保护信号
Failure cause:绝缘击穿或变比失准致保护误动/拒动
Damage mechanism：互感器绝缘老化击穿
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 62271-200 — 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
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 62271-200
No separate clause reference.
6Derived Analysis (seeded from this FM)
5/3/5FMEA Sev/Occ/Det
0.03RBI λ
0.8Monitor pdet
12 月Insp. int.
Current tasks:二次回路校验 | 绝缘监测
RCFA incident:电流互感器/电压互感器故障：绝缘击穿或变比失准致保护误动/拒动，后果类型 Safety/Operational，严重度 5
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 standardsGB/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。