IEC 60143-1:2015

Overview

IEC 60143-1:2015 (Edition 5.1, including amendment 1:2023) defines the general requirements for series capacitor units and capacitor banks intended for connection in series with an alternating current (a.c.) transmission or distribution line within power systems. Applicable for systems operating from 15 Hz to 60 Hz, this standard primarily addresses high-voltage transmission applications and covers the full voltage range for series capacitor devices.

This standard lays out uniform rules for performance, testing, ratings, and safety of series capacitors. It provides installation and operation guidance, enhancing reliability and system safety for high-voltage power network operators. However, it does not apply to self-healing metallized dielectric capacitors or capacitors used for heating, motor circuits, power electronics, or discharge lamp applications. For those applications, other IEC standards apply.

Keywords: a.c. transmission, high-voltage power systems, series capacitors, capacitor banks, IEC 60143-1:2015

Key Topics

• Scope and Exclusions

  • Covers series capacitor units and banks for a.c. transmission and distribution systems (15 Hz - 60 Hz), focusing on high-voltage applications.
  • Excludes capacitors for heating, motors, power electronics, and lighting circuits, referenced in other IEC standards.

• Performance, Testing, and Rating

  • Establishes comprehensive procedures for assessing performance, routine, type, and special tests (including updated ageing tests).
  • Specifies test environments, capacitance, losses, insulation integrity, thermal stability, and discharge characteristics.

• Safety Requirements

  • Outlines mandatory safety features for series capacitors, including discharge devices and protective coordination.
  • Addresses environmental protection, especially for substances such as polychlorinated biphenyls.

• Guidance for Application

  • Provides recommendations for the selection of ratings, bank configuration, insulation levels, overload and overvoltage handling, and long line/altitude corrections.
  • Considers operational scenarios such as system faults, network protection, harmonics, and relay coordination.

• Markings and Documentation

  • Specifies essential labeling and documentation for capacitor units and banks, including instruction books and safety warnings.

Applications

IEC 60143-1:2015 is significant for organizations involved in power transmission and grid stability. Key applications include:

• Transmission Line Series Compensation

  • Enhances power transfer capacity and stability of high-voltage a.c. transmission networks by mitigating reactance and controlling voltage profiles.

• System Reliability and Efficiency

  • Supports the optimal deployment and maintenance of series capacitor banks, ensuring consistent network performance within designed operational limits.

• Standardized Testing and Safety Protocols

  • Enables manufacturers and utilities to specify, test, and maintain series capacitors to common international standards, reducing risk and complying with regulatory requirements.

• Grid Modernization Projects

  • Essential reference for engineers and project managers involved in high-voltage grid upgrades, interconnections, or new substation commissioning.

Related Standards

For a holistic approach to series capacitors and related equipment, consider the following related IEC standards:

• IEC 60143-2: Protective equipment for series capacitor banks
• IEC 60143-3: Internal fuses for series capacitors
• IEC 60143-4: Thyristor-controlled series capacitors
• IEC 60060-1: High-voltage test techniques - General definitions and requirements
• IEC 60071 series: Insulation coordination
• IEC 60549: High-voltage fuses for protection of shunt capacitors
• IEC 60871-1: Shunt capacitors for a.c. power systems above 1,000V

By adhering to IEC 60143-1:2015, power utilities, equipment manufacturers, and system integrators benefit from increased safety, reliability, and international compatibility in the deployment of series capacitors for transmission lines and distribution networks.