IEC 63132-2:2020

Overview

IEC 63132-2:2020 is an international standard developed by the International Electrotechnical Commission (IEC) that provides comprehensive guidance on installation procedures and tolerances for hydroelectric vertical generators. As part 2 of the IEC 63132 series, this document focuses specifically on vertical generators in hydroelectric power plants, applying to machines built according to IEC 60034-7. The standard outlines typical assembly processes, emphasizing best practices and experienced-based tolerances while acknowledging variations due to machine size, design, powerhouse layout, and component delivery schedules.

This standard aims to support manufacturers, installers, and project engineers by defining suitable procedures for installing vertical generators to ensure optimal performance and reliability. It excludes commercial considerations except where inherently linked to installation and does not cover brushless excitation systems.

Key Topics

• Installation Procedures
  IEC 63132-2 defines a step-by-step installation flowchart addressing core assembly tasks such as foundation checks, bracket installation, stator and rotor assembly, bearing setup, alignment, and commissioning. These procedures ensure proper mechanical integration and alignment of vertical hydroelectric generators.

• Installation Tolerances
  The standard sets guidelines on acceptable mechanical tolerances during installation, including shaft runout, verticality, circularity, concentricity, and air gap measurements. These tolerances help maintain generator efficiency and reduce operational wear.

• Typical Assembly Steps Covered

  • Turbine shaft clearance verification
  • Generator foundation and embedded part inspection
  • Lower and upper bracket assembly and installation
  • Stator and rotor mounting
  • Thrust and guide bearing assembly and adjustment
  • Brakes and jacks installation
  • Shaft coupling and precise alignment between turbine and generator shafts
  • Installation of slip rings, brushes, and other auxiliary components
  • Final cleaning, painting, and pre-commissioning checks

• Adaptable Procedures
  The document recognizes that installation sequences may vary depending on machine design or project conditions. It provides a general installation framework that can be tailored as needed.

• Normative Reference
  IEC 60034-7 is referenced for definitions and classifications related to vertical generators.

Applications

IEC 63132-2:2020 is specifically designed for hydroelectric vertical generators used in powerhouses and related facilities. Typical users and applications include:

• Hydroelectric Power Plant Engineers
  For planning and supervising the installation of vertical generators, ensuring compliance with international best practices and standards.

• Generator Manufacturers
  To provide installation guidelines and technical information customized to their products.

• Contractors and Installation Teams
  To execute assembly and alignment procedures with tolerances that guarantee operational reliability and longevity.

• Quality Assurance Professionals
  For auditing installation works and confirming adherence to the established mechanical tolerances and procedures.

This standard is essential in enabling smooth installation workflows, reducing installation-related risks, and optimizing generator performance through accurate alignment and assembly.

Related Standards

• IEC 60034-7 – Rotating electrical machines – Part 7
  Classification of types of construction, mounting arrangements, and terminal box positions; essential for understanding vertical generator configurations.

• Other Parts of IEC 63132 Series
  These cover installation procedures and tolerances for other hydroelectric machine types beyond vertical generators.

• ISO and IEC Terminology Databases
  Resources such as the IEC Electropedia provide standard electrotechnical definitions to complement understanding when applying IEC 63132-2.

Practical Value

By following IEC 63132-2:2020, stakeholders benefit from:

• Streamlined and safe installation processes customized for vertical hydroelectric generators.
• Defined mechanical tolerances that reduce misalignment risks, thus preventing premature wear and failure.
• Enhanced coordination between turbine and generator installation steps, improving overall plant efficiency.
• Assurance of international best practices for quality and uniformity in hydroelectric generator installation.

Adoption of this standard supports sustainable and reliable hydroelectric power generation through robust installation practices aligned with global industry consensus.