IEC 60358-2:2013

Overview

IEC 60358-2:2013 is an international standard published by the International Electrotechnical Commission (IEC) that specifies requirements for AC or DC single-phase coupling capacitors used in power line carrier-frequency (PLC) applications. This standard applies to coupling capacitors rated above 1,000 volts, connected between line and ground. It covers capacitors designed for frequencies ranging from 30 kHz to 500 kHz for PLC systems, as well as similar DC or AC applications at power frequencies between 15 Hz and 60 Hz.

IEC 60358-2:2013 updates and replaces the second edition of IEC 60358 (1990) and serves as a technical revision focusing on coupling capacitors with a low voltage terminal that is either permanently earthed or connected to PLC equipment. This standard should be used in conjunction with IEC 60358-1:2012, which provides general rules applicable to the entire IEC 60358 series.

Key Topics

• Scope and Application
  Defines the use of single-phase coupling capacitors in PLC communication systems, emphasizing their connection between line and ground and operation over carrier frequencies from 30 kHz to 500 kHz.

• Design Requirements
  Specifies design considerations tailored for coupling capacitors and carrier-frequency accessories to ensure reliability and performance in high voltage and frequency environments.

• Test Conditions and Classification
  Outlines routine, type, and special tests necessary to validate electrical, mechanical, and thermal performance. This includes high-frequency capacitance tests, equivalent series resistance measurements, and impulse voltage tests on voltage limitation devices.

• Service Conditions and Ratings
  Details the operating environments and electrical ratings (rated voltage above 1,000 V) applicable to these capacitors for safe deployment in a wide range of power and communication settings.

• Marking and Documentation
  Provides requirements for proper marking of devices for traceability and regulatory compliance.

Applications

IEC 60358-2:2013 primarily serves industries and professionals involved in the design, manufacturing, testing, and application of electrical equipment utilizing power line carrier-frequency systems. Its applications include:

• Power Line Carrier Communication Systems
  Coupling capacitors enable the transmission of PLC signals over high-voltage power lines by coupling communication signals between the power line and carrier frequency equipment while maintaining isolation and voltage withstand capability.

• High-Voltage Power Networks
  Capacitors conforming to this standard can be used in high voltage substations and overhead lines where signal coupling and filtering at power frequencies or carrier frequencies are critical for system monitoring, control, and communication.

• Electrical Equipment Manufacturing
  Manufacturers of power capacitors, coupling devices, and capacitor dividers can use this standard to ensure product compliance with international requirements for PLC applications.

• Testing and Quality Assurance
  Testing facilities and certification bodies apply the IEC 60358-2 framework to verify performance and enforce quality standards on coupling capacitors destined for use in electrical power systems.

Related Standards

• IEC 60358-1:2012
  General rules and definitions for coupling capacitors and capacitor dividers forming the foundational framework for parts 2, 3, and 4 of the series.

• IEC 60481
  Defines transmission requirements for coupling devices used in power line carrier systems, complementing the design and performance criteria in IEC 60358-2.

• IEC 60358 (Original 1990 Edition)
  The superseded standard for single-phase coupling capacitors, now replaced by IEC 60358-2:2013 as its technical revision.

• IEC 61869 Series
  Covers capacitor voltage transformers (CVTs), distinct from the capacitor dividers defined in IEC 60358.

Practical Value

Adhering to IEC 60358-2:2013 ensures coupling capacitors utilized in PLC systems meet stringent international performance and safety criteria, leading to:

• Enhanced reliability and extended lifespan of power line communication infrastructure.
• Consistent electrical characteristics that optimize signal transmission and minimize interference.
• Safety compliance for high-voltage installations with clearly defined test methods.
• Global standardization facilitating equipment interoperability and market access.

By implementing IEC 60358-2:2013, utilities and equipment manufacturers benefit from improved design robustness and system integrity in power line carrier communication networks critical to modern electrical grids.