INSULATION COORDINATION FOR EQUIPMENT WITHIN LOW-VOLTAGE SYSTEMS - PART 4: CONSIDERATION OF HIGH-FREQUENCY VOLTAGE STRESS
International Electrotechnical Committee
FOREWORD
INTRODUCTION
1 Scope and object
2 Normative references
3 Terms and definitions
4 Clearances
4.1 General conditions
4.2 Basic information
4.3 Homogeneous and approximately homogeneous fields
4.4 Inhomogeneous fields
5 Creepage distances
5.1 Experimental data
5.2 Dimensioning of creepage distances
6 Solid insulation
6.1 General consideration
6.2 Influencing factors
6.3 Dimensioning of solid insulation
7 High-frequency testing
7.1 Basic requirements
7.2 Test voltage source
7.3 Conditioning
7.4 High-frequency breakdown test
7.5 High-frequency partial discharge test
7.6 Examples of test results
8 Non sinusoidal voltages
8.1 General considerations
8.2 Periodic impulse voltage
8.3 Harmonic analysis
8.4 Dimensioning procedure and testing
Annex A (informative) Insulation characteristics of clearances
at high-frequency voltages
Annex B (informative) Insulation characteristics of creepage
distances at high-frequency voltages
Annex C (informative) Insulation characteristics of solid
insulation at high-frequency voltages
Annex D (normative) Testing of insulation at high-frequency
voltages
Annex E (informative) Insulation stressed with non-sinusoidal
high-frequency voltages
Annex F (informative) Dimensioning diagrams
Bibliography
Deals with basic, supplementary and reinforced insulation subjected to high-frequency voltage stress within low-voltage equipment. It is applicable for the dimensioning of clearances, creepage distances and solid insulation stressed by any type of periodic voltages with a fundamental frequency above 30 kHz and up to 10 MHz.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 109 |
