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BS EN 60243-1:2013

BS EN 60243-1:2013

$142.49

Electric strength of insulating materials. Test methods – Tests at power frequencies

Published By Publication Date Number of Pages
BSI 2013 30
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IEC 60243-1:2013 provides test methods for the determination of short-time electric strength of solid insulating materials at power frequencies between 48 Hz and 62 Hz. This standard does not cover the testing of liquids and gases, although these are specified and used as impregnates or surrounding media for the solid insulating materials being tested. NOTE: Methods for the determination of breakdown voltages along the surfaces of solid insulating materials are included.

PDF Catalog

PDF Pages PDF Title
6 English
CONTENTS
8 1 Scope
2 Normative references
9 3 Terms and definitions
4 Significance of the test
10 5 Electrodes and specimens
5.1 General
5.2 Tests perpendicular to the surface of non-laminated materials and normal tolaminate of laminated materials
5.2.1 Boards and sheet materials, including pressboards, papers, fabrics and films
11 5.2.2 Tapes, films and narrow strips
5.2.3 Flexible tubing and sleeving
5.2.4 Rigid tubes (having an internal diameter up to and including 100 mm)
12 5.2.5 Tubes and hollow cylinders (having an internal diameter greater than 100 mm)
5.2.6 Cast and moulded materials
13 5.2.7 Shaped solid pieces
5.2.8 Varnishes
5.2.9 Filling compounds
5.3 Tests parallel to the surface of non-laminated materials and parallel to the laminate of laminated materials
5.3.1 General
5.3.2 Parallel plate electrodes
14 5.3.3 Taper pin electrodes
5.3.4 Parallel cylindrical electrodes
5.4 Test specimens
5.5 Distance between electrodes
15 6 Conditioning before tests
7 Surrounding medium
7.1 General
7.2 Tests in air at elevated temperature
7.3 Tests in liquids
16 7.4 Tests in solid materials
8 Electrical apparatus
8.1 Voltage source
8.2 Voltage measurement
17 9 Procedure
10 Mode of increase of voltage
10.1 Short-time (rapid-rise) test
18 10.2 20 s step-by-step test
10.3 Slow rate-of-rise test (120 s… 240 s)
Table 1 – Increments of voltage increase
19 10.4 60 s step-by-step test
10.5 Very slow rate-of-rise test (300 s… 600 s)
10.6 Proof tests
11 Criterion of breakdown
20 12 Number of tests
13 Report
21 Figures
Figure 1 – Electrode arrangements for tests on boards and sheets perpendicular to the surface
22 Figure 2 – Typical example of electrode arrangement for tests on tapes perpendicular to the surface (see 5.2.2)
Figure 3 – Electrode arrangement for tests perpendicular to the surface on tubes and cylinders with internal diameter greater than 100 mm
23 Figure 4 – Electrode arrangement for tests on casting and moulding materials(diameter of the spherical electrodes: d = (20 ± 0,1) mm)
Figure 5 – Electrode arrangement for test on shaped insulating parts (see 5.2.7)
24 Figure 6 – Electrode arrangement for tests parallel to the surface (and along the laminae, if present)
25 Figure 7 – Electrode arrangement for tests parallel to the surface (and along the laminae if present)
26 Figure 8 – Arrangement for tests parallel to the laminae for boards more than 15 mm thick with parallel cylindrical electrodes (see 5.3.4)
27 Annex A (informative)Treatment of experimental data
28 Bibliography

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BS EN 60243-1:2013
$142.49