EN 2240-028:2010

Overview

EN 2240-028:2010 is a European standard developed by CEN that specifies the product requirements for the incandescent lamp, code 337, tailored for aerospace applications. This standard ensures that lamps used in aerospace environments meet consistent quality, performance, and safety criteria. It is designed to be used in conjunction with EN 2756, which defines test methods for aerospace incandescent lamps.

The standard applies to lamps designed with specific electrical and physical characteristics, guaranteeing reliable operation under aerospace conditions. Adhering to EN 2240-028:2010 helps manufacturers and aerospace stakeholders maintain industry-wide compatibility and compliance.

Key Topics

• Scope and Use: Defines required characteristics for incandescent lamp code 337, specifically for aerospace use. Intended to be used alongside EN 2756 for test procedures.
• Dimensions and Mass: The lamp’s physical dimensions, such as bulb size and light centre length, must conform precisely, e.g., a light centre length of 9.5 ± 1 mm and mass of 0.62 kg per 1000 units.
• Electrical Specifications:
  • Nominal voltage: 6 V
  • Nominal current: 0.2 A
  • Nominal power: 1.2 W
  • Nominal luminous flux: 7.5 lumens
  • Colour temperature: 2280 K
• Lamp Life: Designed for a minimum static life of 1,000 hours with both DC and AC currents and a dynamic life of 500 hours with DC current.
• Filament and Cap: Filament form is identified as "C - 2R"; lamp caps must comply with EN 2241, specifically S5,7s/8 type.
• Marking and Identification: Lamps and packaging require clear marking with the international code number outlined in EN 2240-002 for traceability and standard identification.
• Technical Consistency: The product standard complements other parts of the EN 2240 series, such as EN 2240-001 for technical specifications and EN 2240-002 for main characteristics, ensuring a complete framework.

Applications

EN 2240-028:2010 standard lamps are essential components within aerospace electric equipment and systems, particularly for:

• Aircraft Instrumentation: Providing reliable illumination for cockpit controls and indicators.
• Interior Lighting: Ensuring consistent lighting in cabins and compartments.
• Navigation and Signal Lighting: Used in systems requiring standardized incandescent lighting solutions.
• Maintenance and Repair: Facilitates replacement of aerospace lamps with units meeting strict industry criteria.
• Safety-Critical Systems: Where lamp failure is not an option, adherence to EN 2240-028 ensures durability and reliable operation.

By standardizing the manufacturing and testing of these lamps, aerospace manufacturers and suppliers can ensure interoperability and reduced risk of system failures due to lamp inconsistencies.

Related Standards

• EN 2756: Defines test methods for incandescent lamps used in aerospace to validate performance and reliability.
• EN 2240-001: Covers the general technical specification for aerospace incandescent lamps.
• EN 2240-002: Details the main characteristics and coding system for such lamps.
• EN 2241: Specifies physical dimensions and requirements for lamp caps to ensure mechanical compatibility.

These interconnected standards create a comprehensive regulatory environment governing aerospace incandescent lamps, supporting consistent quality and safety within aerospace electrical systems.

Keywords: EN 2240-028, aerospace incandescent lamps, lamp code 337, aerospace lighting standards, aerospace lamp specifications, EN 2756 test methods, aerospace electric equipment, incandescent lamp dimensions, aerospace lamp life, aviation lighting compliance