AS 4435.4-1997

1 - AS 4435.4-1997 INSULATORS-COMPOSITE FOR OVERHEAD POWER LINES-VOLTAGES GREATER THAN 1000 V a.c. - DEFINITIONS, TEST METHOD...
4 - PREFACE
5 - CONTENTS
6 - 1 SCOPE AND APPLICATION
6 - 2 REFERENCED DOCUMENTS
6 - 3 DEFINITIONS
6 - 3.1 Chalking (flouring)
6 - 3.2 Composite post insulator
7 - 3.3 Core of a composite post insulator
7 - 3.4 Coupling
7 - 3.5 Crack
7 - 3.6 Crazing
7 - 3.7 Elastic limit
7 - 3.8 Erosion
7 - 3.9 Housing and sheds of a composite post insulator
7 - 3.10 Hydrolysis
7 - 3.11 Interfaces of a composite post insulator
7 - 3.12 Maximum design cantilever load
7 - 3.13 May
7 - 3.14 Metal end fittings of a composite post insulator
7 - 3.15 Rated tensile load (RTL)
7 - 3.16 Shall
7 - 3.17 Should
7 - 3.18 Tracking
8 - 3.19 Treeing
8 - 4 CLASSIFICATION OF TESTS
8 - 4.1 Design tests
8 - 4.2 Type tests
8 - 4.3 Sampling tests
8 - 4.4 Routine tests
8 - 5 DESIGN TESTS
8 - 5.1 General
8 - 5.2 Tests on interfaces and connections of metal end fittings
8 - 5.2.1 Test specimens and preliminary tests
9 - 5.2.2 Dry power frequency voltage test
9 - 5.2.3 Prestressing
9 - 5.2.4 Verification tests
10 - 5.3 Determination of elastic limit under load
11 - 5.4 Mechanical test
11 - 5.4.1 Test specimens
11 - 5.4.2 Core short-time cantilever failing load test
11 - 5.5 Test of housing: tracking and erosion test
11 - 5.5.1 Test specimens
11 - 5.5.2 Test procedure
12 - 5.5.3 Test conditions
12 - 5.5.4 Evaluation of the test
12 - 5.6 Tests for the core material
12 - 5.6.1 General
12 - 5.6.2 Dye penetration test
13 - 5.6.3 Water diffusion test
13 - 5.6.4 Voltage test
13 - 5.7 Flammability Test
13 - 5.7.1 General
13 - 5.7.2 Critical oxygen index
13 - 5.7.3 Ignition source
13 - 5.7.4 Additional test
14 - 5.8 Power arc test (optional)
14 - 5.8.1 General
14 - 5.8.2 Test method
14 - 5.8.3 Test Evaluation
14 - 6 TYPE TESTS
14 - 6.1 General
15 - 6.2 Dry lightning impulse withstand voltage test
15 - 6.3 Wet power-frequency test
15 - 6.4 Wet switching impulse withstand voltage test
15 - 6.5 Deflection Test
15 - 6.5.1 General
15 - 6.5.2 Test evaluation
15 - 6.6 Cantilever failing load test
15 - 6.6.1 General
15 - 6.6.2 Test method
16 - 6.7 Compression test (optional)
16 - 6.8 Torsional test (optional)
16 - 6.9 Tensile test (optional)
16 - 6.10 Radio-influence voltage test (RIV) (optional)
16 - 7 SAMPLING TESTS
16 - 7.1 General
17 - 7.2 Verification of dimensions (E1+E2)
17 - 7.3 Verification of mechanical performance
17 - 7.4 Galvanizing test (E2)
17 - 7.5 Re-testing procedure
18 - 8 ROUTINE TESTS
18 - 8.1 Identification of the composite post insulators
18 - 8.2 Visual examination
18 - 8.3 Tensile Test

Specifies definitions, test methods and acceptance criteria for composite post insulators for use on a.c. overhead lines.

This Standard is applicable to composite line post insulators. Composite post insulators designed primarily to work in tension applications are not included in the scope of this Standard.This Standard deals with those composite post insulators which include a 'core' and a 'housing'. The core is usually made of resin-impregnated glass fibres. The housing can be manufactured from a variety of materials including elastomers (e.g. silicone, ethylene-propylene), resins (e.g. cycloaliphatic epoxy), or fluorocarbons (e.g. polytetrafluoroethylene).

First published as AS 4435.4-1997.