Overview
IEC 60358-3:2013 is an international standard published by the International Electrotechnical Commission (IEC) that specifies requirements for AC or DC single-phase coupling capacitors used in harmonic-filter applications. Designed for use at voltages higher than 1,000 V, these capacitors are connected between a power line and ground, either permanently earthed or connected to a tuning device. The standard is particularly relevant for electrical engineers and manufacturers specifying power capacitors for harmonic filtering in high-voltage networks. IEC 60358-3:2013 supplements and modifies IEC 60358-1:2012 with additional guidance specific to filter applications.
Keywords: coupling capacitor, harmonic filter, high-voltage, AC capacitor, DC capacitor, IEC 60358-3, tuning device.
Key Topics
Applications
Coupling capacitors compliant with IEC 60358-3:2013 are essential components in high-voltage power systems, particularly where harmonic filtering is required. Typical uses include:
- Harmonic Filter Circuits: Reducing harmonic currents in power transmission and distribution networks to maintain power quality and equipment longevity.
- HVDC and HVAC Transmission Systems: Used in both high-voltage alternating current (HVAC) and high-voltage direct current (HVDC) installations for harmonic rejection.
- Industrial Power Installations: Improving power factor and reducing interference in large industrial facilities.
- Integration with Tuning Devices: Capacitors combined with passive components to target specific frequencies in filter banks.
By setting performance, testing, and construction benchmarks, IEC 60358-3:2013 enables engineers and manufacturers to specify and select reliable capacitors for critical power system applications.
Related Standards
For comprehensive understanding and correct application, IEC 60358-3:2013 should be used in conjunction with related IEC standards, including:
- IEC 60358-1:2012 - Coupling capacitors and capacitor dividers – Part 1: General rules (base requirements for all coupling capacitors and dividers).
- IEC 60358-2 - Specifications for AC or DC single-phase coupling capacitors for power line carrier-frequency applications.
- IEC 60060-1 & IEC 60060-2 - High-voltage test techniques, providing general definitions and test methods.
- IEC 60481 - Coupling devices for power line carrier systems.
- IEC 61869-5 - Instrument transformers, with additional requirements for capacitive voltage transformers.
- Additional guidance: IEC 62001, IEC 60633, and IEC/TR 62543 for HVDC systems and terminologies.
Conclusion:
IEC 60358-3:2013 provides a dedicated framework for evaluating and implementing coupling capacitors in harmonic-filter applications, helping to ensure system performance, safety, and compliance in high-voltage electrical networks. It is a critical reference for power engineers focused on network quality and harmonic mitigation.
Open preview (PDF)Coupling capacitors and capacitor dividers - Part 3: AC or DC coupling capacitor for harmonic-filters applications
