IEC 63522-25:2025

Overview

IEC 63522-25:2025 is an international standard published by the International Electrotechnical Commission (IEC) that specifies test methods to evaluate magnetic interference among electrical relays. This part 25 of the IEC 63522 series focuses on assessing the ability of Devices Under Test (DUTs) to maintain reliable performance when exposed to magnetic fields created by neighboring relays or external sources during transportation, storage, and operational use.

The standard is essential for ensuring that electrical relays can operate correctly in environments with potential magnetic disturbances, which is critical for maintaining safety and functionality in electrical and electronic systems.

Key Topics

• Scope and Purpose: Defines test procedures to check the influence of magnetic interference generated between relays under operating conditions on their functional performance.
• Test Methods:
  • Method 1: Mounting the relay in a magnetic test coil aligned with its sensitivity axis to test operation under controlled magnetic fields.
  • Method 2: Multi-relay mounting arrays evaluating interactions between eight similar relays energized simultaneously, simulating real application clustering.
  • Method 3: Using current impulses in multiple directions over the relay surface to simulate magnetic fields caused by conducted currents.
• Test Conditions: Identification of specific parameters such as coil dimensions, mounting grid patterns, impulse shapes, frequencies, and limits for operate/release values.
• Evaluation Criteria: Functional performance is verified by confirming operate and release values remain within specified acceptable limits during the tests.
• Documentation: Detailed recording of test conditions, methods, and results for reproducibility and certification purposes.

Applications

IEC 63522-25:2025 is highly valuable for manufacturers, testers, and quality assurance professionals working with electrical relays used in:

• Power distribution systems where relay clusters are common and magnetic interference could affect relay function.
• Industrial automation and control panels requiring reliable relay operation despite close proximity to other electromagnetic devices.
• Transportation and storage of relays, ensuring magnetic fields encountered do not compromise relay reliability.
• Telecommunications and data centers where sensitive relays operate near multiple electromagnetic sources.
• Reed relay arrays where manufacturer-declared functional values must consider multi-mounting scenarios.

The standard helps ensure that relays meet stringent electromagnetic compatibility (EMC) requirements, contributing to system reliability, enhanced safety, and compliance with international quality norms.

Related Standards

IEC 63522-25:2025 is designed to be used in conjunction with other relevant IEC standards, including:

• IEC 63522-0: Electrical relays - Tests and measurements - Part 0: Testing - General and guidance, which provides foundational terminology and testing frameworks.
• IEC 63522-4: Tests specific to dielectric strength, complementing magnetic interference testing for comprehensive relay evaluations.
• IEC 63522-7: Functional tests detailing operate and release value measurements critical during magnetic interference assessments.
• IEC 60060-1: High-voltage test techniques, providing definitions and requirements relevant to impulse testing employed in magnetic interference methods.

Together, these standards establish a complete system for testing relay performance under diverse electrical and environmental stresses.

Keywords: IEC 63522-25, magnetic interference, electrical relays, relay testing, electromagnetic compatibility, relay performance, relay operate and release values, electrical relay standards, relay multi-mounting, IEC relay tests, relay magnetic field test, electromagnetic interference (EMI) testing.