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