IEC 60831-2:2014

Overview

IEC 60831-2:2014 is an international standard published by the International Electrotechnical Commission (IEC) that specifically addresses shunt power capacitors of the self-healing type designed for alternating current (a.c.) systems with a rated voltage up to and including 1,000 V. This part 2 of the IEC 60831 series focuses on the essential ageing test, self-healing test, and destruction test requirements for these capacitors. The standard ensures reliability and performance consistency essential for various power system applications.

This is the third edition, replacing the second edition from 1995, introducing significant technical revisions such as updated normative references, new discharge cycles before the ageing test, an alternative self-healing test at d.c. voltage, modified acceptance conditions after the self-healing test, and changes to the destruction test.

Key Topics

• Ageing Test
  This test evaluates the durability and longevity of the capacitor under rated stress conditions. It includes three sequential phases:

  • Energizing the capacitor at 1.25 times its rated voltage for 750 hours at the rated temperature.
  • Applying 1,000 discharge cycles with specified d.c. voltage and inductive load to simulate frequent switching conditions.
  • Repeating the initial voltage application phase.

  The temperature of the capacitor casing is tightly controlled and maintained either in air with forced circulation or in a liquid bath, guaranteeing test consistency.

• Self-Healing Test
  The self-healing property is fundamental in modern power capacitors, allowing automatic restoration of dielectric after a fault. IEC 60831-2 specifies methods for self-healing performance evaluation, including an alternative test using d.c. voltage to complement the a.c. testing. The acceptance conditions after self-healing are also revised to better reflect real-world operational reliability.

• Destruction Test
  This test ensures capacitors can withstand extreme faults safely, preventing catastrophic failure. Modifications to the test sequence and requirements have been introduced in this edition to improve safety assessment. It includes a detailed procedure and specific circuit setups for standardized testing.

• Test Conditions and Setup
  The standard provides detailed instructions on test installation, including the orientation of capacitors, temperature controls, and electrical setup requirements. It ensures uniformity regardless of batch or manufacturer, promoting safety and global interoperability.

Applications

IEC 60831-2:2014 applies to self-healing shunt power capacitors widely used in:

• Power factor correction systems in industrial and commercial installations
• Voltage stabilization and harmonic filtering in low-voltage a.c. power networks
• Renewable energy integration where capacitor reliability is critical for power quality
• Electrical power distribution networks requiring long-term dependable capacitor performance

By ensuring capacitors meet these ageing, self-healing, and destruction tests, engineers and manufacturers can guarantee safer, longer-lasting components that reduce maintenance costs and improve overall system efficiency.

Related Standards

• IEC 60831-1:2014 – General requirements, performance, testing, and safety for self-healing shunt power capacitors up to 1,000 V. IEC 60831-2 should be used in conjunction with this foundational part.
• Other parts of the IEC 60831 series – For capacitors outside the voltage range or different types.
• IEC testing and safety standards for electrical components used in low-voltage power systems to ensure compatibility and compliance.
• International standards on power capacitor installation and maintenance, ensuring comprehensive lifecycle management.

Keywords: IEC 60831-2, shunt power capacitors, self-healing capacitors, ageing test, self-healing test, destruction test, a.c. systems capacitors, rated voltage 1,000 V, power factor correction, capacitor reliability, electrical testing standards, IEC standards.