BSI PD IEC TS 62993:2017:2018 Edition
$142.49
Guidance for determination of clearances, creepage distances and requirements for solid insulation for equipment with a rated voltage above 1 000 V AC and 1 500 V DC, and up to 2 000 V AC and 3 000 V DC
| Published By | Publication Date | Number of Pages |
| BSI | 2018 | 32 |
IEC TS 62993, which is a Technical Specification, gives guidance to technical committees which deal with equipment having a RATED VOLTAGE of more than 1 000 V AC and up to 2 000 V AC, or a RATED VOLTAGE of more than 1 500 V DC and up to 3 000 V DC. RATED VOLTAGES up to 1 000 V AC and 1 500 V DC, as well as higher or lower internal voltages, are covered by IEC 60664-1.
This document applies to equipment for use up to 2 000 m above sea level, and provides guidance for use at higher altitudes.
This document gives guidance for CLEARANCES, CREEPAGE DISTANCES and SOLID INSULATION for equipment to achieve safety. It includes methods of electric testing.
NOTE Requirements for functional insulation are not specified as they are not regarded as safety requirements.
This document does not deal with distances
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through liquid insulation,
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through gases other than air, and
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through compressed air.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 4 | CONTENTS |
| 6 | FOREWORD |
| 8 | INTRODUCTION |
| 9 | 1 Scope 2 Normative references |
| 10 | 3 Terms and definitions |
| 13 | 4 Basic information for the determination of insulation requirements 4.1 General |
| 14 | 4.2 Voltages 4.2.1 General 4.2.2 Determination of recurring peak voltage 4.3 Overvoltage categories Figure 1 – Recurring peak voltage |
| 15 | 4.4 Material groups Table 1 – Rated impulse voltages according to overvoltage categories |
| 16 | 4.5 Pollution degrees 4.5.1 General 4.5.2 Degrees of pollution in the micro-environment 4.5.3 Conditions of conductive pollution 4.5.4 Clearances |
| 17 | 5 Dimensioning rules 5.1 Clearances Table 2 – Clearances to withstand transient overvoltages |
| 18 | Table 3 – Dimensioning of clearances to working voltages, temporary overvoltages or recurring peak voltages |
| 19 | 5.2 Creepage distances 5.2.1 General 5.2.2 Voltage 5.2.3 Pollution 5.2.4 Shape of insulating surface Table 4 – Altitude correction factors |
| 20 | 5.2.5 Relationship to clearance 5.2.6 Creepage distances where more than one material is used or more than one pollution degree occurs 5.2.7 Creepage distances split by floating conductive part Figure 2 – Determination of the width (W) and height (H) of a rib |
| 21 | 5.2.8 Dimensioning of creepage distances of basic insulation, supplementary insulation and reinforced insulation |
| 22 | 5.2.9 creepage distances for DC applications Table 5 – Creepage distances to avoid failure due to tracking |
| 23 | 5.3 Solid insulation 5.3.1 General 5.3.2 Withstand of voltage stresses 6 Tests and measurements 6.1 Tests 6.1.1 General |
| 24 | 6.1.2 Test for verification of clearances |
| 25 | Table 6 – Test voltages based on clearances and a test site altitude of 2 000 m above sea level |
| 26 | 6.1.3 Tests for the verification of solid insulation Table 7 – Correction factors according to test site altitudefor test voltages for clearances |
| 28 | Table 8 – Severities for conditioning of solid insulation |
| 29 | 6.2 Measuring clearances and creepage distances |
| 30 | Bibliography |
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BSI PD IEC TS 62993:2017:2018 Edition
Guidance for determination of clearances, creepage distances and requirements for solid insulation for equipment with…
