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International Standards for Power Transformer (IEC, IEEE, ANSI)

Power transformers key standards including IEC60076, IEEE C57, ANSI C57. They comply with stringent safety, reliability, and efficiency standards to ensure the stable and secure operation of the grid.

1. International Electrotechnical Commission (IEC) Standards:

1) IEC 60076 Series: This series covers various aspects of power transformers, including general requirements (IEC 60076-1), temperature rise (IEC 60076-2), loading guide (IEC 60076-7), and more specific topics like gas-insulated transformers (IEC 60076-20), and power transformers with fluid-immersed wound core (IEC 60076-16).

2) IEC 60215: Specifies the withstand test for the temperature rise of liquid-immersed transformers.

3) IEC 60071-1: Deals with the insulation coordination for equipment within low-voltage and high-voltage power systems.

2. Institute of Electrical and Electronics Engineers (IEEE) Standards:

1) IEEE C57.12 Series: A comprehensive set of standards for power transformers, including general requirements (IEEE C57.12.00), liquid-filled transformers (IEEE C57.12.01), and dry-type transformers (IEEE C57.12.90).

2) IEEE C57.110: Specifies the methods for the calculation of short-circuit currents in three-phase systems.

3. American National Standards Institute (ANSI) Standards:

   ANSI C57.12 Series: Aligns closely with IEEE standards for power transformers and often referenced together.

4. International Organization for Standardization (ISO) Standards:

    Although ISO does not have specific transformer standards, ISO 9001 is often adhered to for quality management systems in transformer manufacturing.

5. Underwriters Laboratories (UL) Standards:

1) UL 840: Covers safety standards for dry-type transformers.

2) UL 1446: Insulating liquids for transformers and similar equipment.

6. National Electrical Manufacturers Association (NEMA) Standards:

    NEMA ST-20: Establishes the standard for liquid-filled distribution transformers.

These standards cover design, manufacture, testing, installation, operation, and maintenance aspects of power transformers. They address electrical parameters, insulation levels, dielectric tests, short-circuit withstand capabilities, cooling systems, noise limits, and environmental considerations, among others. Qinghao Electric is fully customized for you by adhering to required standards to guarantee transformers’ performance and longevity.