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Equipment VFD-101
FM enclosure_environment_corrosion
ISO 14224 mode Enclosure corrosion / condensation Enclosure corrosion / condensation
Source synthetic + standards-based engineering estimate (ISO 14224 / IEC 61800 / IEEE C57 框架归类)
柜体环境腐蚀/凝露
VFD-101 · Variable Frequency Drive (VFD)
Related equipment → VFD-101
0.82Source conf.
—Evidence conf.
Enclosure corrosion / condensationISO 14224 mode
1Failure Mechanism
Function:提供防护外壳与环境隔离
Failure cause:防护等级不足或密封老化致潮气/盐雾侵入，PCB 腐蚀爬电
Damage mechanism：防护等级不足或密封老化致潮气/盐雾侵入，PCB 腐蚀、爬电距离下降
2Source Basis (where this FM comes from)
synthetic + standards-based engineering estimate (ISO 14224 / IEC 61800 / IEEE C57 框架归类)
Source confidence 0.82: this FM is derived from the ontology KB and cross-validated by synthetic + standards-based engineering estimate (ISO 14224 / IEC 61800 / IEEE C57 框架归类).
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 61800-5-1 — Adjustable speed electrical power drive systems — Safety requirements · 机理级工程估计，非实测；引用 governing standard 作为分类出处std:IEC 60529 — Degrees of protection provided by enclosures (IP Code) · 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 61800-5-1IEC 60529
No separate clause reference.
6Derived Analysis (seeded from this FM)
5/3/4FMEA Sev/Occ/Det
0.04RBI λ
0.5Monitor pdet
12 月Insp. int.
Current tasks:柜内温湿度/凝露监测 | 密封与防护等级检查
RCFA incident:柜体环境腐蚀/凝露：防护等级不足或密封老化致潮气/盐雾侵入，PCB 腐蚀爬电，后果类型 Operational，严重度 5
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; 泄漏监测 + 密封/填料定期更换, 螺栓热紧固
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; seal_leak
Governing standardsAPI 510API 570API 571API 581API 682
⚠ 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。