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BSI PD IEC/TR 61916:2017

BSI PD IEC/TR 61916:2017

$167.15

Electrical accessories. Harmonization of general rules

Published By Publication Date Number of Pages
BSI 2017 38
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This document, which is a Technical Report, provides guidance on requirements and tests for subjects applicable to electrical accessories that are within the scope of IEC TC 23 and its subcommittees.

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PDF Pages PDF Title
4 CONTENTS
6 FOREWORD
8 INTRODUCTION
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 General requirements
4.1 General
4.2 Standard conditions for operation in service
4.2.1 Ambient temperature
11 4.2.2 Altitude
4.2.3 Maximum relative humidity at 40 °C
4.2.4 External magnetic field
4.2.5 Accessory orientation
4.3 Ambient air temperature range for testing
5 Resistance to heat
5.1 General
5.2 Requirements
12 5.3 Tests
13 6 Screws, current-carrying parts and connections (electrical and mechanical)
6.1 General
6.2 Types of screw
6.2.1 Thread-forming screw
6.2.2 Thread-cutting screw
Figures
Figure 1 – Thread-forming screw
14 6.3 Requirements
Figure 2 – Thread-cutting screw
16 6.4 Tests
Tables
Table 1 – Torque per thread diameter
17 7 Resistance to abnormal heat and to fire
7.1 General
7.2 Requirements
18 7.3 Glow-wire flammability test for end-products, IEC 60695-2-11
7.3.1 Purpose and principle
19 7.3.2 Test method
7.3.3 Relevance of test data
Figure 3 – Small parts
20 8 Resistance of insulating materials to tracking
8.1 General
8.2 Requirements
8.3 Tracking index test, IEC 60112
8.3.1 Purpose and principle
8.3.2 Test method
21 8.3.3 Relevance of test data
9 Resistance to rusting
9.1 General
9.2 Requirements
9.3 Test
22 10 Legibility, durability and indelibility of marking
10.1 General
10.2 Requirements
10.3 Test
23 11 Screw-type terminals for connecting conductors
12 Criteria for tests in accessory standards
13 Tolerances
Figure 4 – Test piston dimensions
24 14 Mechanical strength
14.1 Impact
14.2 Free fall
15 Appropriate dimensioning of insulation distances
15.1 General
15.2 General information
25 15.3 Dimensioning of clearances
15.4 Dimensioning of creepage distances
27 15.5 Dimensioning of solid insulation
15.6 Dimensioning of functional insulation
15.7 Practical application of the IEC 60664 series with regards to particular questions
15.8 Other information useful for TC 23 and its subcommittees
28 16 Resistance to UV
16.1 General
29 16.2 Basic principles
16.3 Tests
16.3.1 General
16.3.2 UV test
30 16.3.3 Mechanical test
31 Annex A (informative)Material selection process
A.1 General
A.2 Requirements for material selection process
32 A.3 Material selection process
A.3.1 Material selection based on flammability classifications
A.3.2 Arc ignition test
Table A.1 – Minimum glow-wire ignition temperature (GWIT) of insulating materials required for the flammability classification of the selected material
Table A.2 – Minimum glow-wire ignition temperature (GWIT) of insulating materials required for the GWFI classification of the selected material
Table A.3 – Minimum number of arcs required for the flammability classification of the selected material
Table A.4 – Minimum number of arcs required for the GWFI classification of the selected material
34 Annex B (informative)Suggested GWEPT temperatures
35 Bibliography

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BSI PD IEC/TR 61916:2017
$167.15