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Equipment VFD-101
FM precharge_circuit_failure
ISO 14224 mode Precharge circuit failure Precharge circuit failure
Source synthetic + standards-based engineering estimate (ISO 14224 / IEC 61800 / IEEE C57 框架归类)
预充电电路失效
VFD-101 · Variable Frequency Drive (VFD)
Related equipment → VFD-101
0.82Source conf.
—Evidence conf.
Precharge circuit failureISO 14224 mode
1Failure Mechanism
Function:限制上电浪涌电流
Failure cause:预充电电阻/继电器失效，上电浪涌击穿整流桥
Damage mechanism：预充电电阻烧断或继电器触点失效，上电浪涌电流击穿整流桥
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 60146 — Semiconductor converters — General requirements and line commutated converters · 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 60146
No separate clause reference.
6Derived Analysis (seeded from this FM)
6/2/3FMEA Sev/Occ/Det
0.03RBI λ
0.6Monitor pdet
12 月Insp. int.
Current tasks:预充电继电器/电阻状态监测 | 上电时序测试
RCFA incident:预充电电路失效：预充电电阻/继电器失效，上电浪涌击穿整流桥，后果类型 Operational，严重度 6
7RCM Maintenance Decision (strategy landing)
CBMOn-Condition 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; 无损检测(UT/VT/MT/PT), 按 API 581 RBI 风险定级设定检验间隔
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; electrical
Governing standardsAPI 570API 571API 581GB/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。