BS 3036:1958

Co-operating organizations
Foreword
Section one: General
1 Scope
2 Service conditions
3 Definitions
Section two: Requirements
4 Voltage rating
5 Sizes
6 Temperature rise at rated current
7 Fusing factors
8 Time/current characteristics
9 Performance
10 Contacts
11 Spacing of fixed contacts
12 Terminals
13 Non-metallic parts
14 Shielding and prevention of danger
Section three: Type tests
15 General
16 Insulation resistance
17 Temperature rise at rated current
18 Time/current characteristics
19 Minimum fusing current
20 Preparation of fuses for tests for duty
21 Testing circuit and earthing
22 Tests for duty
23 Criteria of failure during tests for duty
Section four: Marking
24 Marking of fuse carriers
Appendices
A Notes on terminology
B Measurement of prospective current and cut-off
    current
C Computation of power factor and time constant from
    oscillograms
E Measurement of recovery voltage
F Selection of semi-enclosed fuses
G Information to be included in reports of type tests
    for breaking-capacity ratings

Sizes of fuse carriers and bases for fuses where element is replaceable wire. For use in a.c. circuits. Three categories according to prospective current and time constant. For use at altitudes not exceeding 2000 m and temperatures averaging 35°C. Selection of fuses for different applications.

This standard relates to low-voltage and medium-voltage semi-enclosed fuses, having ratings of 240 volts maximum to earth, and 100 amperes or less, intended for any of the a.c. categories of duty at 50 Hz included in Table 1 and for use under service conditions not more onerous than those described in Clause 2.