March 2026 Electrical Engineering Standards: Batteries, Relays, and Safety Requirements

Electrical engineering professionals have four new standards to consider following March 2026’s wave of publications. Covering battery safety, relay performance, digital data for switchgear, and electrical safety in lighting, these recently released documents introduce vital requirements, updated testing methods, and clarification around technical compliance in fast-evolving applications. For manufacturers, quality managers, engineers, and compliance teams, understanding these new or revised standards is crucial to maintaining safety, ensuring interoperability, and meeting global regulatory expectations.

Overview / Introduction

The field of electrical engineering continues to evolve rapidly, driven by innovations in energy storage, automation, lighting control, and digitalized infrastructure. International standards are vital in this landscape, offering universally recognized specifications for safety, performance, interoperability, and information exchange. For organizations operating globally, keeping track of updated standards is both a matter of compliance and a route to competitive advantage.

This article summarizes four significant standards published in March 2026, covering:

• Safe design and testing for portable nickel-based batteries
• Explanations of safety principles in lighting product standards
• Standardized product data exchange for low-voltage switchgear and controlgear
• Specialized electrical relay coil testing procedures

Read on for a comprehensive breakdown of what these documents cover, their key requirements, implications for your work, and direct links to the complete texts on iTeh Standards.

Detailed Standards Coverage

IEC 62133-1:2026 - Safety Requirements for Nickel-Based Portable Batteries

Secondary cells and batteries containing alkaline or other non-acid electrolytes – Safety requirements for portable sealed secondary cells, and for batteries made from them, for use in portable applications – Part 1: Nickel systems

The newly revised IEC 62133-1:2026 sets the international benchmark for the safety of portable sealed secondary nickel cells and batteries containing alkaline electrolyte. Replacing the 2017 edition, this document is essential for manufacturers and users of nickel-cadmium (NiCd) and nickel-metal hydride (NiMH) batteries in portable devices.

Scope and Applicability:

• Applies to design, assembly, and testing of nickel-based rechargeable batteries used in portable equipment, including consumer electronics, medical devices, and industrial tools
• Covers requirements under both normal use and "reasonably foreseeable misuse"
• Includes updated and clarified terminology, replacing ambiguous terms and refining temperature testing conditions

Key Requirements and Changes:

• Removal of certain definitions, such as "secondary battery", "portable battery", and "portable cell", to reduce confusion
• Clear specification of temperature conditions: "room temperature" is now defined as 20 °C ± 5 °C
• Updated methods for vibration and temperature cycling tests
• New requirements for insulation, battery casing, and internal wiring, ensuring minimum resistance and reliability
• Enhanced type testing procedures for abuse scenarios, such as short circuits, drop tests, and overcharging
• Expanded safety documentation and labeling, including warnings for small, ingestible batteries

Compliance and Implementation:

• Obligatory for battery OEMs and integrators selling into international markets
• Especially relevant for applications in consumer electronics, medical devices, industrial handhelds, and any product using sealed portable batteries
• Practical implications include redesign of type testing procedures and re-labeling according to the new requirements

Key highlights:

• Temperature conditions refined for more accurate and reproducible safety tests
• Testing procedures for abuse, including mechanical shock, short circuit, and overpressure
• Expanded user information and marking requirements for safer end use

Access the full standard:View IEC 62133-1:2026 on iTeh Standards

IEC TR 63139:2026 - Electrical Safety in Lighting Standards

Explanation and background information on electrical safety requirements in TC 34 standards

IEC TR 63139:2026 is a technical report providing much-needed background for professionals working with lighting products and systems, especially those referencing IEC TC 34 standards for luminaire and controlgear equipment. As lighting technologies—especially LED systems—become increasingly interconnected, clarification on safety and insulation requirements is critical.

Scope and Applicability:

• Offers detailed explanations for the electrical safety requirement rationales found in standards governing lighting and associated equipment
• Addresses insulation design, voltage calculation in failure modes, and protective extra low voltage (PELV) system design
• Includes practical examples and formulae for analyzing insulation coordination, particularly for products combining AC and DC circuits
• Newly includes analysis on the summation of touch currents in interconnected luminaires, integrating controlgear insulation coordination best practices

Key Requirements and Insights:

• Explains calculation methods for working voltages under insulation failure scenarios
• Outlines insulation requirements between live parts, accessible conductive parts, and among circuit types
• Illustrates the impact of failure conditions on system safety, raising the bar for designs integrating multiple interconnected devices (e.g., modern smart lighting networks)
• Provides in-depth technical rationale for changes in IEC 60598-1 and IEC 61347-1 affecting lighting system designers

Compliance and Implementation:

• Intended for designers and testers of luminaires, LED controlgear, and smart lighting installations
• Offers guidance that helps firms avoid safety misconceptions and supports more rigorous safety case documentation and compliance evidence
• A key reference for technical leads and compliance engineers in organizations developing or certifying lighting products to IEC standards

Key highlights:

• Expansion of failure mode analyses and corresponding insulation requirements
• Practical calculations for voltage addition in mixed AC/DC and multi-phase systems
• Comprehensive guidance on touch currents and system integration safety for connected lighting

Access the full standard:View IEC TR 63139:2026 on iTeh Standards

FprEN IEC 62683-1:2025 - Product Data for Low-Voltage Switchgear

Low-voltage switchgear and controlgear – Product data and properties for information exchange – Part 1: Catalogue data

FprEN IEC 62683-1:2025 introduces a harmonized approach for digital product data management in the low-voltage switchgear sector. As integration with industrial IoT and automated engineering environments accelerates, the standard sets the reference structure for sharing and integrating component catalogues across software and supply chains.

Scope and Applicability:

• Defines standardized property blocks and classification for circuit breakers, switches, contactors, relays, starters, and more, including assemblies
• Specifies naming conventions and metadata for each property and class—facilitating machine readability and automated information systems
• Supports information exchange between manufacturers, system integrators, engineers, and procurement teams, streamlining specification, procurement, and maintenance

Key Requirements and Benefits:

• Each device class defined with a comprehensive set of attributes and property blocks
• Standardization of data structure improves plug-and-play integration within digital product lifecycle tools (e.g., CAD, PLM, BIM, industrial software platforms)
• Facilitates compliance with digital twin, Industry 4.0, and supply chain digitalization requirements
• Enables more reliable component selection, fewer errors in specification, and quicker response in project automation

Compliance and Implementation:

• Applicable to switchgear and controlgear manufacturers, engineering consultancies, integrators, and large asset operators
• Organizations must adapt their catalogues and product documentation to conform with the standardized structure for B2B data exchange

Key highlights:

• Unified classification and metadata schema for a wide range of switchgear and controlgear types
• Readiness for automated engineering and procurement workflows
• Improved accuracy and efficiency in component specification and lifecycle management

Access the full standard:View FprEN IEC 62683-1:2025 on iTeh Standards

IEC 63522-3:2026 - Testing of Relay Coil Properties

Electrical relays – Tests and measurements – Part 3: Relay coil properties

IEC 63522-3:2026 introduces standardized test procedures for evaluating the electrical properties of relay coils—an essential quality factor for reliable relay performance. As relays are critical safety and control elements in everything from industrial automation to grid infrastructure, robust test methods are foundational for compliance and operational reliability.

Scope and Applicability:

• Covers relay coil resistance, impedance, inductance, power consumption, and transient suppression characteristics
• Defines conditions and severity levels for testing under various operational, transportation, and storage environments
• Lays out rigorous reporting requirements enabling traceability and repeatability of test data

Key Requirements and Benefits:

• Detailed procedures for four-wire resistance measurement, ensuring accuracy even in the presence of suppression diodes
• Methods for power consumption and transient voltage measurements, crucial for system safety and electromagnetic compatibility (EMC)
• Required documentation of measurement instrumentation and test conditions for quality control and certification

Compliance and Implementation:

• Essential for relay manufacturers, test labs, quality assurance teams, and integrators in energy, transport, and automation sectors
• Direct impact on certification, type testing, and ongoing quality monitoring of relay products

Key highlights:

• Harmonized test setup and evaluation approach for all core coil properties
• Reliable testing for performance under operational and abnormal conditions
• Enhances product quality assurance and conformity assessment processes

Access the full standard:View IEC 63522-3:2026 on iTeh Standards

Industry Impact & Compliance

The March 2026 electrical engineering standards release brings critical updates that will influence manufacturing, supply chain operations, system design, and compliance strategies globally. Key impacts include:

• Requirement Alignment: Companies must update processes, product documentation, and quality controls to reflect new and revised requirements—particularly for battery safety, digital product information, and system interoperability.
• Product Certification and Market Access: Adopting these standards is often an entry ticket to international markets, reduces the risk of recalls, and builds customer trust.
• Timelines: Organizations should schedule audits and process updates promptly, as regulatory bodies and major clients may require compliance in future tenders and certifications.
• Risks of Non-Compliance: Failure to implement updated standards can result in non-conformity penalties, market restrictions, increased recall risk, and jeopardized end-user safety.
• Benefits of Compliance: Improved operational safety, reduced liability, enhanced global reputation, and smoother digital transformation workflows.

Technical Insights

Across these four standards, several technical requirements emerge as particularly noteworthy:

• Safety and Testing: Harmonized requirements for abusive condition testing (batteries) and rigorous environmental simulation (relays) underpin higher system reliability.
• Data Consistency: Digital property standards (switchgear) pave the way for automation in specification, procurement, and maintenance processes, supporting Industry 4.0 initiatives.
• Comprehensive Evaluation: Updates in insulation and failure mode analysis (lighting controlgear) stress the importance of holistic design verification beyond basic functionality.
• Documentation: Detailed marking, reporting, and specification guidelines mean organizations must maintain precise records throughout the design, testing, and lifecycle management phases.
• Certification Considerations: Testing to these standards may be required by certification bodies or for CE marking and other international conformity schemes. Ensure all requisite documentation and test reports are prepared and available on request.

Conclusion / Next Steps

Staying ahead in the electrical engineering sector demands up-to-date knowledge and proactive implementation of the latest standards. The March 2026 publications drive further harmonization and raise the bar for global excellence across safety, efficiency, and interoperability.

Recommendations:

1. Assess your product lines, documentation, and processes for alignment with these new or revised standards.
2. Train design, testing, and compliance staff on updated requirements, especially in battery safety, data modeling, and relay testing.
3. Integrate standardized data formats and testing procedures immediately for new projects, and plan migration paths for legacy systems.
4. Use the provided iTeh Standards links for full access to the normative documents and ongoing updates.

Staying informed is crucial—subscribe to updates from iTeh Standards and routinely review new releases to maintain compliance, minimize risk, and capitalize on evolving best practices in electrical engineering.