AS 1767.2.2-2008

1 - AS 1767.2.2-2008 Insulating liquids Method 2.2: Test methods—Measurement of relative permittivity, dielectric dissipation factor (tan δ) and d.c. resistivity
4 - PREFACE
5 - CONTENTS
6 - INTRODUCTION
7 - 1 Scope
7 - 2 Normative references
7 - 3 Terms and definitions
8 - 4 General
8 - 4.1 Permittivity and dielectric dissipation factor (tan δ)
9 - 4.2 Resistivity
9 - 4.3 Sequence of determinations
9 - 4.4 Factors leading to erroneous results
10 - 5 Apparatus
10 - 5.1 Test cell
11 - 5.2 Test equipment
11 - 5.3 Glassware
11 - 5.4 Measuring instrument for permittivity and tan δ
11 - 5.5 Measuring instrument for d.c. resistivity
11 - 5.6 Time-measuring device
11 - 5.7 Safety
11 - 6 Cleaning solvent
12 - 7 Cleaning the test cell
12 - 7.1 Trisodium phosphate cleaning procedure
13 - 7.2 Storage of cell
13 - 8 Sampling
13 - 9 Preparation of samples
14 - 10 Conditioning and filling the test cell
14 - 10.1 Cell conditioning
14 - 10.2 Filling the cell
14 - 11 Test temperature
14 - 12 Measurement of dissipation factor (tan δ)
14 - 12.1 Test voltage
14 - 12.2 Measurement
15 - 12.3 Report
15 - 13 Measurement of relative permittivity
15 - 13.1 Measurement
16 - 13.2 Report
16 - 14 Measurement of d.c. resistivity
16 - 14.1 Test voltage
16 - 14.2 Time of electrification
16 - 14.3 Measurement
17 - 14.4 Report
18 - Annex A (informative) Example of an alternative procedure for cleaning the test cell – Ultrasonic procedure
19 - Annex B (informative) Example of a simplified cleaning procedure for a test cell
20 - Annex C (informative) Alternative procedures for routine testing of dielectric dissipation factor and resistivity of insulating liquids