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Difference between Machine Directive (MD) and LVD for Automated Parts

自动化零部件机械指令MD和LVD区别:MD机械指令2006/42/EC覆盖机械可互换设备安全部件提升附件链条绳索织带可拆卸机械传动装置部分完成机械(排除游乐场核工业实验室矿用),主要危险是机械性伤害(挤压撞击切割)对应产线大型工业设备;LVD低电压指令2014/35/EU覆盖独立投放的电气设备交流50-1000V/直流75-1500V(家用电器电缆电源熔断器等特定部件+附件II豁免清单);边界判定完整机械走MD+单独投放电气部件走LVD+机械内电气部件随整机MD评估+家用电气产品走LVD;符合程序MD强制EHSR+风险评估+技术文件高风险需公告机构介入,LVD附件III内部生产控制制造商自我声明,两者都贴CE;标准MD用A/B/C型协调标准+ISO 12100风险评估,LVD用EN 60204等电气标准协调标准推定符合。

Differences between Machinery Directive MD and Low Voltage Directive (LVD) for Automation Components

Differences between MD and LVD: Mechanical risks fall under MD, electrical risks under LVD (Source: Industry Documents): MD: Machinery Directive 2006/42/EC (Source: EUR-Lex); LVD: Low Voltage Directive 2014/35/EU (Source: EU Official Website) — Boundaries: LVD does not apply when covered by machinery (Source: Sorena).

I. MD Scope

Mechanical: Mechanical + Interchangeable Equipment (Source: EUR-Lex); Component: Safety Components + Lifting Accessories (Source: EUR-Lex); Transmission: Chains, Ropes, Webbing + Transmission Devices (Source: EUR-Lex); Partially Completed: Partially Completed Mechanical (Source: EUR-Lex); Exclusion: Amusement Park, Nuclear Industry, Laboratory, Mining (Source: EUR-Lex) — MD: Mechanical + Components (Large Production Line Equipment).

II. Scope of LVD

Voltage: 50-1000V AC/75-1500V DC (Source: EU Official Website); Product: Power cables for household appliances (Source: EU Official Website); Component: Specific components such as fuses (Source: EU Official Website); Independent: Electrically installed equipment placed separately (Source: Sorena); Exemption: Annex II Exclusion List (Source: Sorena) – LVD: Independent electrical equipment (based on voltage).

III. Risk Types

MD: Mechanical injury, crushing, impact, cutting (Source: Industry documents); LVD: Health, safety, and electrical risks (Source: EU official website); OSHA: MD corresponds to OSHA workplace requirements (Source: Industry documents); Electrical: LVD covers electrical safety (Source: EU official website); Overlay: Components are assessed along with the whole machine (Source: BAUA) – Risk: Mechanical/Electrical (based on primary hazard).

IV. Boundary Determination

Mechanical Body: Complete machinery follows MD (Source: Sorena); Electrical Components: Separately deployed follows LVD (Source: Sorena); Internal Machinery: Internal electrical components are assessed along with MD (Source: BAUA); Household: Household electrical products follow LVD (Source: BAUA); Check Annex I: MD Annex I Exclusion List (Source: HSENI) — Boundary: Complete machine MD + Separate LVD (Key Judgment).

V. Compliance Procedures

MD: EHSR + Risk Assessment + Technical Documentation (Source: EUR-Lex); High-Risk MD: Requires involvement of a notified body (Source: DGUV); LVD: Annex III Internal Production Control (Source: Sorena); LVD: Self-declaration is sufficient (Source: Sorena); CE: Both require CE marking (Source: EU official website) — Procedure: MD classification + LVD self-declaration (different paths).

VI. Standards Support

MD: Harmonized standards of type A/B/C (Source: EU official website); MD: ISO 12100 risk assessment (Source: Industry practice); LVD: Electrical standards such as EN 60204; Presumed: Presumed compliance with harmonized standards (Source: EU official website); Combination: Dual standards for automation equipment (Source: Industry practice) — Standard: MD mechanical + LVD electrical (combined use).

VII. Procurement Recommendations

1. **Determine the Entity** (Complete Machine MD/Individual LVD); 2. **Identify Risks** (Main Hazard Type); 3. **Select Procedures** (Classification/Self-Declaration); 4. **Assemble Standards** (Dual Standards);
5. **Compare with 2027 (New Machinery Regulations)** – Differences: Boundary + Risk + Procedure (Three-line Judgment).

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