Overview
IEC 61347-2-2:2011 is an international standard published by the International Electrotechnical Commission (IEC) under the title Lamp controlgear – Part 2-2: Particular requirements for d.c. or a.c. supplied electronic step-down convertors for filament lamps. This standard sets out the specific safety requirements for electronic step-down convertors, also known as electronic transformers, used in powering filament lamps such as tungsten-halogen lamps. It applies to convertors operating on direct current (d.c.) supplies up to 250 V or alternating current (a.c.) supplies up to 1,000 V, and with rated output voltages up to 50 V r.m.s. (for a.c.) or 120 V ripple-free d.c., making it highly relevant to low-voltage lighting systems for residential, commercial, and industrial environments.
This second edition replaces earlier versions and amendments, with significant changes largely related to safety extra-low voltage (SELV) requirements. It should be read in conjunction with IEC 61347-1:2007, the general standard for lamp controlgear.
Key Topics
- Scope and Applicability: Applies to electronic step-down convertors for filament lamps associated with low-voltage tungsten-halogen lamps and other filament types.
- Safety Requirements: Covers requirements for protection against electric shock, insulation, moisture resistance, and fault conditions.
- Performance and Marking: Specifies mandatory labeling, information provision, and performance criteria for step-down convertors.
- Classification: Distinguishes between different protection types, including auto-wound, separating, and SELV convertors.
- Testing Procedures: Outlines necessary laboratory testing for compliance, including fault conditions, transformer heating, and resistance to environmental factors.
- Normative References: Refers to key standards such as IEC 60357 (tungsten-halogen lamps), IEC 61047 (performance requirements of step-down convertors), and several transformer and protective standards under IEC 61558.
Applications
IEC 61347-2-2:2011 is applicable across a broad range of lighting control systems utilizing filament lamps, with particular focus on:
- Residential Lighting: Ensuring the safety of electronic transformers used in downlights, spotlights, and decorative halogen lamps.
- Commercial and Retail Spaces: Reliable operation and safety compliance of low-voltage lighting installations in offices, shops, and displays.
- Industrial Installations: Step-down convertors in specialized lighting systems demanding robust protection and compliance with international safety norms.
- Luminaire Manufacturers: Provides a framework for designing and testing electronic controlgear integrated into or supplied with luminaires.
- Certification and Compliance: Essential for testing laboratories and certification bodies assessing products for market entry or regulatory approval.
By adhering to the requirements of IEC 61347-2-2, manufacturers and installers can safeguard against risks such as electric shock, overheating, and fire hazards associated with electronic step-down convertors in low-voltage lighting systems.
Related Standards
When implementing or certifying according to IEC 61347-2-2:2011, attention should be given to the following related standards:
- IEC 61347-1: Lamp controlgear - Part 1: General and safety requirements (Base standard for all lamp controlgear).
- IEC 60357: Tungsten halogen lamps (Non-vehicle) - Performance specifications.
- IEC 61047: DC or a.c. supplied electronic step-down convertors for filament lamps - Performance requirements.
- IEC 61558 Series: Various parts covering safety of transformers, including:
In summary, IEC 61347-2-2:2011 delivers critical requirements for the safety and operational integrity of electronic step-down convertors used in filament lamp applications, supporting increased safety and reliability for modern low-voltage lighting installations worldwide.
Open preview (PDF)Lamp controlgear - Part 2-2: Particular requirements for d.c. or a.c. supplied electronic step-down convertors for filament lamps
