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BS 1362:1973+A3:2021

$142.49

General purpose fuse links for domestic and similar purposes (primarily for use in plugs). Specification

Published By Publication Date Number of Pages
BSI 2021 30
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This British Standard specifies dimensions and performance requirements for general purpose cartridge fuse links of current ratings not exceeding 13 A for domestic and similar purposes (primarily for use in plugs complying with the requirements of BS 1363) on declared supply voltages not exceeding 250 V (see 4.5) at a nominal frequency of 50 Hz or 60 Hz.

It does not cover fuse bases or fuse holders for use with these fuse links.

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The object of this specification is to standardize the characteristics, construction, tests and markings of fuse links coming within its scope. In particular to standardize:

  • the rated voltage;

  • the rated currents;

  • the rated power loss;

  • the time/current zones and conventional currents;

  • the rated breaking capacity; and

  • the dimensions.

PDF Catalog

PDF Pages PDF Title
5 Foreword
7 1 Scope
2 Normative references
3 Terms and definitions
10 4 Standard conditions for operation in service
4.1 Ambient air temperature
4.2 Temperature inside an enclosure
4.3 Altitude
4.4 Atmospheric conditions
11 4.5 Voltage
4.6 Current
4.7 Frequency
4.8 Conditions of installation
5 Classification
6 Characteristics of fuse links
6.1 Summary of characteristics
6.2 Rated voltage
6.3 Rated currents
12 6.4 Rated frequency
6.5 Rated power loss
6.6 Time/current characteristics and conventional currents
6.7 Rated breaking capacity
6.8 Dimensions
Figure 1 — Dimensions of fuse link
13 Table 1 — Dimensions of fuse links
7 Marking
8 Standard conditions for construction
8.1 Mechanical design and construction of fuse links
8.2 Temperature rise and power loss
8.3 Operation
14 8.4 Breaking capacity
9 Tests
9.1 General
15 Table 2 — Survey of tests on fuse links
9.2 Test for power loss
16 9.3 Verification of operating characteristics
17 9.4 Breaking capacity tests
Table 3 — Values for breaking capacity tests
18 Table 4 — Values of prospective current for breaking capacity test No. 2
19 9.5 Mechanical test for strength of fuse links
20 Figure 2 — Standard time/current zones for: In = 13 A, In = 3 A
21 Figure 3 — Test fuse base
22 Figure 4 — Typical diagram of the circuit used for breaking capacity tests (see 9.4)
23 Figure 5 — Interpretation of oscillograms taken during breaking capacity tests (see 9.4.7)
24 Figure 6 — Principal dimensions of tumbling barrel
25 Annex A (informative)  Measurement of short-circuit power-factor
27 Figure A.1 — Determination of circuit-impedance for calculation of power-factor in accordance with method I
28 Bibliography
BS 1362:1973+A3:2021
$142.49