Why are IEC standards so important to the power industry?

In the global power industry standardization system, standards developed by the International Electrotechnical Commission (IEC) have always occupied a core position, especially in the field of power transformers. They not only provide a unified technical framework for product research and development, production, and testing, but also serve as a key support for promoting global power equipment interconnection and ensuring the safe and stable operation of the power grid.

What is The Core IEC Standards System?

The IEC has developed a multi-level, comprehensive standards system for power transformers. The core standards can be divided into three main categories:

Basic General Standards

IEC 60076 Series: Covers the technical requirements for the entire life cycle of oil-immersed power transformers, comprising 14 parts. Key sub-standards include:

IEC 60076-1: General Principles and Definitions, clarifying the basic parameters, terminology, and scope of application of transformers;

IEC 60076-3: Insulation Levels, Insulation Tests, and External Insulation Air Gap, specifying insulation test requirements such as lightning impulse and switching impulse;

IEC 60076-5: Short-Circuit Withstand Capacity, clarifying the short-circuit current withstand value, test methods, and judgment criteria for transformers. IEC 60076-11: A specific standard for dry-type power transformers, specifying core indicators such as insulation class (F class, H class), temperature rise limits, and fire resistance for dry-type products such as epoxy resin cast and impregnated transformers.

Specific Performance Standards

IEC 60551 Series: Standards for power transformer loss limits, divided into 4 parts. IEC 60551-4, for 110kV and above high-voltage transformers, specifies the energy efficiency classification of no-load loss and load loss (Class I being the highest energy efficiency), and is the core basis for global transformer energy-saving certification.

IEC 61378 Series: Standards for cooling systems of liquid-immersed transformers, covering cooling methods (ONAN, OFAF, etc.), performance testing, and operation and maintenance requirements to ensure the compatibility of the cooling system with the transformer body.

Special Scenario Standards

IEC 61558-2-4: Safety isolation transformer standard, specifying insulation strength and leakage current limits for special scenarios in medical and industrial settings;

IEC 62716: High voltage direct current (HVDC) converter transformer standard, adapting to the needs of ultra-high voltage direct current transmission projects, specifying special requirements such as DC voltage withstand and harmonic losses.

Why are IEC standards so important for power transformers?

For companies and owners participating in global transformer projects, compliance with IEC standards is a "prerequisite" for project success. Its core value is reflected in three aspects:

1. Overcoming market access barriers: More than 80% of countries and regions worldwide use IEC standards as a technical threshold for transformer market access. For example, EU CE certification and Southeast Asian TISI certification are based on IEC standards. Products that comply with the standards can directly enter the target market, avoiding project delays due to "standard incompatibility." 2. Ensuring Power Grid Safety and Stability: IEC standards, through unified requirements for insulation levels, short-circuit withstand capabilities, and temperature rise limits, ensure that transformers from different manufacturers can operate compatiblely within the same power grid, reducing the risk of grid failures due to differences in equipment performance. For example, a multinational power grid project in Africa achieved interconnection between the power grids of 11 countries by using transformers compliant with IEC standards, increasing power supply reliability to 99.8%.

3. Reducing Project Costs and Risks: Transformers compliant with IEC standards can achieve "one-time testing, global certification," reducing the cost of repeated testing (e.g., TÜV certification, based on IEC standards, can cover multiple markets such as the EU and the Middle East with a single test); at the same time, standardized equipment allows for the use of common spare parts and technical solutions during operation and maintenance, reducing maintenance costs by more than 30%.

TSTY Products Meet IEC Standards

Based on a deep understanding and rigorous adherence to IEC international standards, the entire TSTY power transformer series strictly follows the IEC 60076 core series, the IEC 60551 energy efficiency standard, and the IEC 62425 environmental protection specifications. From design and development to production and testing, the entire process adheres to international benchmarks, undergoing rigorous testing including insulation resistance, lightning impulse, and short-circuit withstand tests. All performance indicators meet or exceed standard requirements, possessing core advantages such as high efficiency, energy saving, safety, stability, and environmental compatibility. With comprehensive compliance certifications and superior product quality, our transformers have been successfully exported to over 80 countries and regions worldwide. They are widely used in various scenarios, including multinational power grids, new energy power plants, and industrial parks. Providing reliable support for power infrastructure construction in different regions, our standardized capabilities break down market barriers and win the consistent trust and recognition of users globally.