IEC 62798:2014

Overview

IEC 62798:2014 is an international standard published by the International Electrotechnical Commission (IEC) that defines test methods for industrial electroheating equipment, specifically focusing on infrared emitters. This standard establishes the test procedures, conditions, and measurement methods required to determine the main parameters and operational characteristics of industrial infrared emitters. The scope includes infrared emitters with maximum spectral emission at wavelengths longer than 780 nm in air or vacuum, typically emitting wideband continuous spectra via thermal radiation or high-pressure arcs.

The document offers a comprehensive framework to ensure uniformity and reliability in testing infrared emitters used in various industrial applications, thereby promoting quality assurance, product safety, and performance verification.

Key Topics

• Classification of Infrared Emitters
  The standard categorizes infrared emitters based on their spectral emission characteristics, facilitating appropriate test method selection and comparative performance analysis.

• Test Types and Conditions
  IEC 62798 specifies tests related to power consumption, emitter temperature profiles, radiation characteristics, mechanical ruggedness, and lifetime evaluation. Standard and non-standard environmental conditions, such as supply voltage and ambient temperature, are defined for repeatability.

• Measurement Techniques
  Detailed instructions on measuring electric parameters, temperature (including temperature distribution and thermal ruggedness), irradiance and radiance, and spectral emission are included. Particular emphasis is placed on accuracy and the use of thermal imaging for assessing temperature uniformity.

• Technical Tests

  • Power consumption characteristics (rated power, inrush current)
  • Temperature testing (rated temperature, heating and cooling time)
  • Radiation characteristics (irradiation distribution, emitted spectrum, total radiant power)
  • Mechanical and thermal ruggedness tests to assess durability and operational reliability
  • End-of-life criteria and lifetime measurement protocols

• Emitter Efficiency
  Concepts of conversion efficiency, transfer efficiency, and irradiation efficiency are addressed, including methodologies such as ray-tracing for performance evaluation.

• Annexes and Normative References
  Extensive annexes provide further explanations on thermal infrared radiation, spectral emissivity measurement, temperature measurement distributions, and end-of-life criteria.

Applications

IEC 62798:2014 serves as a critical reference for manufacturers, testing laboratories, and quality assurance teams involved in the design, production, and validation of industrial infrared emitters. Its standardized test methods are applicable to:

• Industrial Electroheating Systems: Ensuring reliable performance of infrared emitters in processes such as drying, curing, heating, and surface treatment.
• Quality Control: Establishing consistent testing protocols for incoming and outgoing inspection of infrared emitter components.
• Product Development: Guiding R&D engineers in evaluating emitter characteristics, optimizing efficiency, and enhancing thermal performance.
• Safety Compliance: Verifying operational parameters to meet industrial safety standards and reduce failure risks.
• Benchmarking: Comparing infrared emitters from different manufacturers based on uniform test results.

Related Standards

• IEC standards related to electrical heating and electroheat equipment that complement IEC 62798 include:
  • IEC 60519 - Safety in electroheating installations
  • IEC 60439 series - Low-voltage switchgear and controlgear assemblies
• Standards governing measurement techniques for radiative heat transfer and temperature sensors, which support the methodologies outlined in IEC 62798.
• Other international standards specifying environmental testing and durability assessment methods for industrial equipment.

By aligning with IEC 62798:2014, stakeholders can ensure that industrial infrared emitters meet rigorous performance standards, supporting optimized energy use, operational reliability, and long service life in critical industrial applications.