Why is IEC 60269 Important?

It primary responsibility of a maintenance technician is to ensure the safety and dependability of electrical systems.

IEC 60269, the international standard for low-voltage fuses, is one of the most important standards to follow:

Key Features of IEC 60269

Structure

IEC 60269 is divided into many parts that cover different types of fuses.

  • Part I: Covers general requirements.
  • Part 2: Covers fuses for the industrial applications.
  • Part 3: Covers fuses for household and related applications.
  • Part 4: Fuses to protect semiconductor devices.
  • Part 5: Recommendations for applying low-voltage fuses.

Fuse Types

The standard defines various fuse classifications, including:

  • gG/gL: General-purpose fuses for cable and wire protection (the one shown in the image)
  • aM: Motor circuit fuses for short-circuit protection.
  • gR: Full-range semiconductor fuses.
  • gS: Fuses for protecting specific applications.

Rated Characteristics

Technical Specifications

  • Type: NT1.
  • Rated Current: 200A.
  • Voltage Ratings: AC 500V (120kA) AC 690V (50kA) DC 440V (100kA)