IEC 63522-35:2025

IEC 63522-35:2025 Overview

IEC 63522-35:2025 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies the test methods for assessing the resistance of electrical relays to cleaning solvents. This standard applies to all types of relays within the scope of IEC technical committee 94 and ensures that relay markings remain legible and that the components maintain their integrity under typical conditions of transportation, storage, and operational cleaning processes.

The document provides a standardized test procedure to evaluate how various cleaning solvents affect ink markings on relays and verify that no damage occurs to the relay after solvent exposure. The main goal is to guarantee reliability and traceability in relay identification, critical for maintenance and operational safety in electrical systems.

Key Topics Covered

• Scope and Application:
  The standard encompasses all electrical relays under TC 94’s scope, focusing specifically on performance during mechanical handling and exposure to cleaning solvents encountered through transport and operational maintenance.

• Test Procedure:

  • Tests apply primarily to ink markings on relay surfaces, as these are susceptible to solvent damage.
  • Relays should be tested in an as-manufactured, uncleaned state to simulate real-world conditions.
  • Tests include immersion in specific solvents such as demineralized water and petroleum-based solvents at controlled temperatures.
  • Markings are assessed before and after exposure to ensure legibility is maintained.
  • Visual inspections and optional electrical or mechanical measurements are conducted post-test.

• Environmental Conditions:

  • Testing must be conducted under controlled ambient conditions: approximately 23°C temperature, 25-75% relative humidity, and standard atmospheric pressure.
  • Solvent temperatures vary by test method, typically maintained at around 55°C for water-based tests and ambient temperature for petroleum solvents.

• Safety Precautions:
  Handling cleaning solvents requires safety measures such as adequate ventilation, protection against skin and eye contact, and controlled storage to avoid fire hazards.

Practical Applications

IEC 63522-35:2025 is essential for manufacturers, testing laboratories, and quality assurance teams involved in:

• Electrical Relay Manufacturing:
  Ensuring the durability of relay markings and the structural integrity when relays are exposed to standard cleaning solvents during assembly or maintenance.

• Maintenance and Quality Control:
  Verifying that relays maintain operational reliability and traceability after routine cleaning procedures in industries such as power distribution, automation, and electronics manufacturing.

• Logistics and Storage:
  Assessing the impact of environmental exposure during transportation and storage to prevent degradation that could compromise relay identification or function.

• Regulatory Compliance:
  Meeting international requirements for electrical components to withstand environmental and handling stress, including solvent resistance, thereby facilitating global market access.

Related Standards

IEC 63522-35:2025 is part of the IEC 63522 series for electrical relays and complements other test and measurement standards within this family, including:

• IEC 63522-0: General and guidance on electrical relay tests and measurements.
• IEC 63522-1: Visual inspection and dimensional checks of relays to ensure marking and physical specifications.
• IEC 63522-4: Dielectric strength test to verify electrical isolation performance.
• IEC 63522-7: Functional tests verifying relay operational reliability under various conditions.
• IEC 60068-2-45: Basic environmental testing procedures, specifically on immersion in cleaning solvents, providing foundational methods referenced in IEC 63522-35.

By aligning with these complementary standards, IEC 63522-35 supports a comprehensive quality assurance framework for electrical relays in diverse applications worldwide.

Keywords: IEC 63522-35, electrical relays, cleaning solvents resistance test, relay marking durability, relay testing standards, solvent resistance, electrical component testing, IEC relay standards, relay quality assurance, electrical relay cleaning procedures.