Overview
IEC 60358-4:2018 is an international standard published by the International Electrotechnical Commission (IEC) that specifies requirements for DC and AC single-phase capacitor dividers. These capacitor dividers are connected between line and ground and are primarily used in manufacturing Voltage Transformers, among other applications. As part 4 of the IEC 60358 series titled Coupling capacitors and capacitor dividers, this standard must be used in conjunction with IEC 60358-1, which provides general rules. IEC 60358-4:2018 replaces the second edition IEC 60358 (1990) and introduces technical revisions ensuring alignment with modern manufacturing and application needs.
Key Topics
- Scope of Application: Covers single-phase capacitor dividers used between line and ground, designed for both DC and AC voltages. Focus is on their use in Voltage Transformer manufacturing and related applications.
- Type and Classification: Defines different types of capacitor dividers, such as capacitor voltage dividers (C-Divider), resistor-capacitor voltage dividers (R-C Divider, C-R Divider, R-C-R Divider) highlighting design variations involving capacitors and resistors.
- Voltage Ratings and Parameters: Specifies rated primary and secondary voltages, rated capacitances, as well as rated series and parallel resistances critical for manufacturing and testing.
- Design and Test Requirements: Details design rules, service conditions, and testing protocols including routine, type, and special tests relevant for performance evaluation and safety compliance.
- Terminology: Defines important terms such as voltage divider, rated primary/secondary voltage, and components within the divider including high-voltage and intermediate voltage capacitors to standardize communication.
Applications
IEC 60358-4:2018 plays a key role in ensuring the reliability and safety of voltage measurement systems by regulating single-phase capacitor dividers. Common applications include:
- Voltage Transformers Manufacturing: Capacitor dividers are integral in constructing voltage transformers that provide accurate voltage scaling and measurement in power systems.
- Power Quality and Monitoring: Used in equipment responsible for voltage measurement, capacitor dividers ensure precise monitoring of power systems for effective control and protection.
- Electrical Testing and Calibration: The standard facilitates industry-wide uniform testing, improving confidence in the accuracy and durability of devices employing capacitor dividers.
- High Voltage Equipment: Ensures capacitor dividers meet safety and performance requirements when installed in high voltage environments between line and ground.
Related Standards
- IEC 60358-1: General rules governing coupling capacitors and capacitor dividers; essential for comprehensive application of Part 4.
- IEC 60358-2: Addresses AC or DC single-phase coupling capacitors for power line carrier-frequency applications.
- IEC 60358-3: Applicable to AC or DC coupling capacitors used in harmonic-filter applications.
- IEC 61869 Series: Covers requirements for complete Voltage Transformers where capacitor dividers form a component.
- IEC 60050: Provides widely accepted electrotechnical vocabulary referenced within IEC 60358-4 for defining terms.
The IEC 60358-4:2018 standard improves the consistency of manufacturing and testing procedures for single-phase capacitor dividers, enhancing performance monitoring and operational safety in electrical power systems. Adhering to this standard ensures compliance with global best practices in voltage measurement instrumentation.
Open preview (PDF)Coupling capacitors and capacitor dividers - Part 4: DC and AC single-phase capacitor dividers
