AS 1767.2.5-1999

1 - AS 1767.2.5-1999 INSULATING LIQUIDS - TEST METHODS - UNUSED HYDROCARBON-BASED INSULATING LIQUIDS-TEST METHODS FOR EVALUATING...
4 - PREFACE
6 - CONTENTS
7 - Section 1: General
7 - 1.1 Scope
7 - 1.2 Normative references
8 - 1.3 General principle of the methods
8 - 1.4 Equipment
8 - 1.4.1 Heating arrangement
9 - 1.4.2 Test vessels
9 - 1.4.3 Absorption tubes
9 - 1.4.4 Filtering crucibles
10 - 1.4.5 Porcelain vessels
10 - 1.4.6 Soap bubble flowmeter
10 - 1.4.7 Timer
10 - 1.4.8 Gas supply
10 - 1.4.9 Burette
10 - 1.4.10 Thermometer
10 - 1.4.11 Erlenmeyer
11 - 1.5 Reagents
11 - 1.5.1 Normal heptane
11 - 1.5.2 Alkali blue 6 B indicator
11 - 1.5.3 Phenolphthalein indicator
11 - 1.5.4 Titration solvent
11 - 1.5.5 Potassium hydroxide
11 - 1.5.6 Oxidant gas
11 - 1.5.7 Hydrochloric acid
11 - 1.5.8 Chloroform
12 - 1.6 Cleaning of test vessels
12 - 1.7 Catalyst
12 - 1.8 Insulating liquid sample conditioning
12 - 1.9 Determinations on the oxidized insulating liquid
12 - 1.9.1 Sludge formation
13 - 1.9.2 Soluble acidity (SA)
14 - 1.9.3 Volatile acidity (VA)
14 - 1.9.4 Total acidity (TA)
15 - 1.9.5 Oxidation rate (only for methods B and C)
15 - 1.9.6 Dielectric dissipation factor
15 - Section 2: Method A
15 - 2.1 Outline of the method
15 - 2.2 Test conditions
15 - 2.3 Procedure
15 - 2.3.1 Preparation of the test
16 - 2.3.2 Oxidation
16 - 2.4 Determinations on the oxidized oil
16 - 2.4.1 Sludge
16 - 2.4.2 Soluble acidity (SA)
16 - 2.4.3 Other determination (optional)
16 - 2.5 Report
16 - 2.6 Precision
17 - Section 3: Method B
17 - 3.1 Outline of the method
17 - 3.2 Test conditions
18 - 3.3 Procedure
18 - 3.3.1 Preparation of the test
18 - 3.3.2 Oxidation
18 - 3.3.3 Determination of the induction period
19 - 3.4 Determinations on the oxidized oil (optional)
19 - 3.4.1 Sludge
19 - 3.4.2 Soluble acidity (SA)
19 - 3.4.3 Volatile acidity (VA)
19 - 3.4.4 Total acidity (TA)
19 - 3.4.5 Oxidation rate
19 - 3.4.6 Dielectric dissipation factor
20 - 3.5 Report
20 - 3.6 Precision
20 - 3.6.1 Relative repeatability (r) (95% confidence):
20 - 3.6.2 Relative reproducibility (R) (95% confidence):
21 - Section 4: Method C
21 - 4.1 Outline of the method
21 - 4.2 Test conditions
21 - 4.3 Procedure
21 - 4.3.1 Preparation of the test
22 - 4.3.2 Oxidation
22 - 4.4 Determinations on the oxidized insulating liquid
22 - 4.4.1 Sludge
22 - 4.4.2 Soluble acidity (SA)
22 - 4.4.3 Volatile acidity (VA)
22 - 4.4.4 Total acidity (TA)
22 - 4.4.5 Other determinations (optional)
23 - 4.5 Report
23 - 4.6 Precision
23 - 4.6.1 Relative repeatability (r) (95% confidence)
23 - 4.6.2 Relative reproducibility (R) (95% confidence)
24 - ANNEX A - Determination of maximum diameter of the pores of a fritted glass filter
25 - ANNEX B - Thermometer specifications
25 - B.1 Thermometer specification for method A
25 - B.2 Thermometer specification for methods B and C
30 - APPENDIX ZZ - VARIATIONS TO IEC 61125 FOR APPLICATION IN AUSTRALIA