IEC 62135-2:2020

Overview - IEC 62135-2:2020 (Resistance welding equipment - EMC requirements)

IEC 62135-2:2020 is the third edition product standard that specifies electromagnetic compatibility (EMC) requirements for resistance welding equipment and allied processes. It applies to machines connected to mains supplies with rated voltages up to 1 000 V AC RMS and covers the frequency range 0 Hz to 400 GHz. This edition (2020) cancels and replaces the 2015 edition and introduces updated emission limits and new radiated magnetic field requirements. Note: this document does not define safety requirements.

Key technical topics and requirements

• Scope and applicability
  • Applies to resistance welding equipment and allied processes; takes precedence over generic EMC standards for this product group.
• Test setup and general requirements
  • Test conditions, measuring instruments, artificial mains network, probes and antennas are defined to standardize emission and immunity testing.
• Emission testing
  • Classification into Class A and Class B equipment with specific conducted and radiated emission limits.
  • Mains terminal disturbance voltages, electromagnetic radiation disturbance and low‑frequency emissions are covered.
• Immunity testing
  • Defined immunity performance criteria (A, B, C) and immunity levels for enclosure, AC input power ports and measurement/control ports.
• Radiated magnetic field
  • New technical requirements added in this edition to address magnetic field emissions from welding equipment.
• Annexes
  • Annex C: additional provisions for battery-powered equipment.
  • Annex D: requirements for equipment containing radio devices (receivers/transmitters).
• Documentation
  • Requirements for purchaser/user documentation to support compliance and installation.

Practical applications - who uses IEC 62135-2:2020

• Manufacturers of resistance welding equipment - to design and verify EMC compliance prior to market release.
• Test laboratories and certification bodies - to perform standardized emission and immunity testing against product limits.
• Systems integrators and OEMs - to ensure welding systems meet EMC requirements when installed in manufacturing lines.
• Procurement and compliance teams - to specify EMC requirements in purchase contracts and verify supplier documentation.

SEO keywords (naturally integrated)

IEC 62135-2:2020, resistance welding equipment EMC, electromagnetic compatibility requirements, radiated magnetic field, emission limits, immunity testing, mains up to 1000 V, Class A Class B.

Related standards and notes

• Part of the IEC 62135 series (Resistance welding equipment).
• Drafted in accordance with ISO/IEC Directives, Part 2; this product standard takes precedence over generic EMC standards for resistance welding equipment.