BS EN IEC 63012:2019
$142.49
Insulating liquids. Unused modified or blended esters for electrotechnical applications
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 28 |
This document defines requirements for the characterization of unused modified esters or blends of unused esters used as insulating liquids for electrotechnical applications. It does not cover liquids that contain any proportion of used liquids.
The liquids covered by this document are intended mainly for transformer applications.
Unused modified/synthetized esters are derived from a natural or synthetic base, or are blends of both. This document covers a variety of ester liquids not covered by other standards specific to natural esters (IEC 62770) or synthetic esters (IEC 61099).
As it addresses various categories of liquids, this document also covers a wide range of values for certain performance characteristics. An important property is viscosity, which can affect the design and cooling performance of electrical equipment. A categorization is defined based on the kinematic viscosity of the different liquids. The category of low viscosity ester liquids is established.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 5 | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications |
| 7 | English CONTENTS |
| 9 | FOREWORD |
| 11 | INTRODUCTION |
| 12 | 1 Scope 2 Normative references |
| 14 | 3 Terms and definitions |
| 15 | 4 Classification 4.1 General 4.2 Fire performance classification 4.3 Viscosity classification 5 Properties, significance and test methods 5.1 Physical properties 5.1.1 Appearance |
| 16 | 5.1.2 Colour 5.1.3 Viscosity 5.1.4 Lubricity 5.1.5 Thermal conductivity 5.1.6 Thermal expansion coefficient 5.1.7 Specific heat capacity 5.1.8 Pour point |
| 17 | 5.1.9 Water content 5.1.10 Water saturation 5.1.11 Density 5.1.12 Interfacial tension 5.2 Electrical properties 5.2.1 AC breakdown voltage 5.2.2 Lightning impulse breakdown voltage |
| 18 | 5.2.3 Partial discharge inception voltage (PDIV) 5.2.4 Dielectric dissipation factor (DDF) 5.2.5 Relative permittivity (dielectric constant) 5.2.6 DC resistivity 5.2.7 Electrostatic charging tendency (ECT) 5.3 Chemical properties 5.3.1 Acidity 5.3.2 Additive content 5.3.3 Corrosive and potentially corrosive sulphur compounds |
| 19 | 5.3.4 Methanol content 5.4 Properties related to long term performance 5.4.1 Oxidation stability 5.4.2 Operating temperature |
| 20 | 5.4.3 Material compatibility 5.4.4 Stray gassing 5.4.5 Gassing tendency 5.5 Health, safety and environmental properties 5.5.1 General 5.5.2 Polychlorinated biphenyls (PCBs) 5.5.3 Environmental toxicity 5.5.4 Flash point and fire point |
| 21 | 5.5.5 Sustainability 5.5.6 Biodegradation 5.5.7 Disposal 6 Minimum performance requirements 7 Identification and general delivery requirements |
| 22 | Table 1 – Required performance characteristics of modified or blended esters |
| 23 | Table 2 – Optional performance characteristics of modified or blended esters |
| 24 | Annex A (informative) Miscibility and compatibility of liquids and retrofilling of transformers |
| 25 | Bibliography |
