1、BRITISH STANDARD CONFIRMED APRIL 1980 BS 1362:1973 Incorporating Amendment Nos.1 and2 Specification for General purpose fuse links for domestic and similar purposes (primarily for use in plugs) UDC 64.06 83:621.316.923.2BS1362:1973 This British Standard, having been approved by the Electrical Indust
2、ry Standards Committee, was published under the authority of the Executive Board on 28 February, 1973 BSI 03-1999 First published March 1947 First revision July 1953 Second revision February 1973 The following BSI references relate to the work on this standard: Committee reference ELE/78/1 Draft for
3、 comment 70/21750 ISBN 0 580 07438 2 Co-operating organizations The Electrical Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives of the following Government departments and scientific and industrial organizations: Association of Man
4、ufacturers of Electrical Contractors Association Domestic Electrical Appliances of Scotland Associated Offices Technical Electrical Research Association* Committee Electricity Council, the Central Association of Consulting Engineers* Electricity Generating Association of Mining Electrical and Board
5、and the Area Boards in Mechanical Engineers England and Wales* Association of Supervisory and Electronic Engineering Association Executive Engineers* Engineering Equipment Users British Electrical and Allied Association* Manufacturers Association* Institution of Electrical Engineers* British Railway
6、s Board Institution of Electrical and British Radio Equipment Electronics Technician Engineers Manufacturers Association Lighting Industry Federation British Steel Corporation Limited Crown Agents for Oversea Ministry of Defence Governments and Administrations National Inspection Council for Departm
7、ent of Employment* Electrical Installation Contracting Department of the Environment National Physical Laboratory Department of Trade and Industry (Department of Trade and Electric Cable Makers Industry) Confederation Oil Companies Material Electrical Contractors Association Association* (Incorporat
8、ed) Post Office* South of Scotland Electricity Board The Government department and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Assoc
9、iation of Short-circuit Testing London Transport Executive Authorities Ministry of Defence (Army) Electrical Power Engineers Ministry of Defence (Navy) Association Radio and Electronic Component Lloyds Register of Shipping Manufacturers Federation Amendments issued since publication Amd. No. Date of
10、 issue Comments 4573 June 1984 6691 April 1991 Indicated by a sideline in the marginBS1362:1973 BSI 03-1999 i Contents Page Co-operating organizations Inside front cover Foreword iii 1 General 1 1.1 Scope 1 1.2 Object 1 2 Definitions 1 2.1 Fuses and their components parts 1 2.2 General terms 1 2.3 C
11、haracteristic quantities 2 3 Standard conditions for operation in service 3 3.1 Ambient air temperature 3 3.2 Temperature inside an enclosure 3 3.3 Altitude 3 3.4 Atmospheric conditions 3 3.5 Voltage 3 3.6 Current 3 3.7 Frequency 3 3.8 Conditions of installation 3 4 Classification 3 4.1 General 3 5
12、Characteristics of fuse links 3 5.1 Summary of characteristics 3 5.2 Rated voltage 3 5.3 Rated currents 4 5.4 Rated frequency 4 5.5 Rated power loss 4 5.6 Time/current characteristics and conventional currents 4 5.7 Rated breaking capacity 4 5.8 Dimensions 4 6 Marking 4 6.1 Marking on fuse links 4 7
13、 Standard conditions for construction 4 7.1 Mechanical design and construction of fuse links 4 7.2 Temperature rise and power loss 4 7.3 Operation 5 7.4 Breaking capacity 5 8 Tests 5 8.1 General 5 8.2 Test for power loss 6 8.3 Verification of operating characteristics 6 8.4 Breaking capacity tests 7
14、 8.5 Mechanical test for strength of fuse links 9 Appendix A Measurement of short-circuit power-factor 15 Figure 1 Dimensions of fuse link 4 Figure 2 Standard time/current zones for I n= 3 A and I n= 13 A 10 Figure 3 Test fuse base 11 Figure 4 Typical diagram of the circuit used for breaking capacit
15、y tests 12BS1362:1973 ii BSI 03-1999 Page Figure 5 Interpretation of oxcillograms taken during breaking capacity tests 13 Figure 6 Principal dimensions of tumbling barrel 14 Figure 7 Determination of circuit-impedance for calculation of power-factor in accordance with method 1 16 Table 1 Dimensions
16、of fuse links 4 Table 2 Survey of tests on fuse links 6 Table 3 Values for breaking capacity tests 7 Table 4 Values of prospective current for breaking capacity test No.2 8 Publications referred to Inside back coverBS1362:1973 BSI 03-1999 iii Foreword This revision of BS1362 incorporates a new arran
17、gement of the clauses. This has been done in order to agree as closely as possible with the arrangement and content of Publication269-1 of the International Electrotechnical Commission, as modified for fuses for domestic and similar purposes. To ensure interchangeability, the dimensions of the fuse
18、links are unchanged but, as with other quantities, are now given in metric units. The electrical characteristics of the fuse links are the same as in the previous edition of this standard, but further standardization has been achieved by specifying time/current zones within which these characteristi
19、cs of any fuse link must lie. The testing procedure, particularly for the breaking capacity tests, has been improved and clarified. A mechanical (tumbling) test and an appendix on the measurement of power factor have been added. Fuses within the scope of this standard are not sensitive to normal ele
20、ctromagnetic disturbances, and therefore no immunity tests are required. Significant electromagnetic disturbance generated by a fuse is limited to the instant of its operation. Provided that the maximum arc voltages during operation to the type test comply with the requirements of the clause in the
21、standard specifying maximum arc voltage, the requirements for electromagnetic compatibility are deemed to be satisfied. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with
22、 a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi toiv, pages1to16, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendment
23、s incorporated. This will be indicated in the amendment table on theinside front cover.iv blankBS1362:1973 BSI 03-1999 1 1 General 1.1 Scope This British Standard specifies dimensions and performance requirements for general purpose cartridge fuse links of current ratings not exceeding13A for domest
24、ic and similar purposes (primarily for use in plugs complying with the requirements of BS1363) on declared supply voltages not exceeding250V (see3.5) at a nominal frequency of50Hz or60Hz. It does not cover fuse bases or fuse holders for use with these fuse links. NOTEThe Publications referred to in
25、this standard are listed on the inside back cover. 1.2 Object 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
26、 time/current zones and conventional currents, the rated breaking capacity, the dimensions. 2 Definitions For the purposes of this British Standard, the following definitions apply. 2.1 Fuses and their component parts 2.1.1 fuse a device that, by the fusion of one or more of its specially designed a
27、nd proportioned components, opens the circuit in which it is inserted and breaks the current when this exceeds a given value for a sufficient time. The fuse comprises all the parts that form the complete device 2.1.2 fuse base the fixed part of a fuse provided with terminals for connection to the sy
28、stem. The fuse base comprises all the parts necessary for insulation 2.1.3 fuse carrier the movable part of a fuse designed to carry the fuse link. The fuse carrier does not include any fuse link 2.1.4 fuse holder the combination of a fuse base with its fuse carrier 2.1.5 fuse link the part of a fus
29、e including the fuse element which requires replacement by a new fuse link after the fuse has operated and before the fuse can be put back into service 2.1.6 fuse link contact a conducting part of fuse link designed to engage with a fuse base contact or with a fuse carrier contact 2.1.7 fuse element
30、 the part of a fuse designed to melt when the fuse operates 2.2 General terms 2.2.1 enclosed (cartridge) fuse link a fuse link in which the fuse element is totally enclosed, so that during operation it cannot produce any harmful external effects due to the development of an arc, the release of gas o
31、r the ejection of flame or metallic particles 2.2.2 current limiting fuse link a fuse link that, during and by its operation in a specified current range, limits the current to a substantially lower value than the peak value of the prospective current 2.2.3 general purpose fuse link a current limiti
32、ng fuse link capable of breaking under specified conditions all currents which cause melting of the fuse element, up to its rated breaking capacity 2.2.4 ambient air temperature the temperature, determined under prescribed conditions, of the air surrounding the complete device (e.g.for fuses install
33、ed inside an enclosure it is the temperature of the air outside the enclosure)BS1362:1973 2 BSI 03-1999 2.3 Characteristic quantities 2.3.1 rated values terms employed to designate the characteristic values that together define the working conditions upon which the tests are based and for which the
34、equipment is designed. For fuses the rated values usually stated are the voltage, current and breaking capacity 2.3.2 prospective current of a circuit (with respect to a fuse) the current that would flow in a circuit if a fuse situated therein were replaced by a conductor of negligible impedance wit
35、hout any other change in the circuit or of the supply 2.3.3 prospective breaking current the prospective current at a time corresponding to the instant of the initiation of the arc in a fuse during a breaking operation 2.3.4 breaking capacity the prospective breaking current that a fuse is capable o
36、f breaking at a stated recovery voltage under prescribed conditions 2.3.5 cut-off current the maximum instantaneous value reached by the current during the breaking operation of the fuse, when the fuse operates in such a manner as to prevent the current from reaching the otherwise attainable maximum
37、 2.3.6 cut-off characteristic a curve giving the cut-off current as a function of the prospective breaking current under stated conditions of operation NOTEIn the case of a.c., the values of the cut-off currents are the maximum values reached whatever the degree of asymmetry. In the case of d.c., th
38、e values of the cut-off currents are the maximum values reached, related to the time constant as specified. 2.3.7 pre-arcing time (melting time) the time between the commencement of a current large enough to cause the fuse element(s) to melt and the instant when an arc is initiated 2.3.8 arcing time
39、 the interval of time between the instant of the initiation of the arc and the instant of final arc extinction 2.3.9 operating time the sum of the pre-arcing time and the arcing time 2.3.10 I 2 t the integral of the square of the current for a given time interval: NOTEI 2 t values usually stated for
40、 fuse links are the pre-arcing I 2 t and operating I 2 t extending over the pre-arcing time and the operating time respectively. 2.3.11 I 2 t characteristic a curve giving I 2 t values (pre-arcing I 2 t and/or operating I 2 t) as a function of prospective current under stated conditions of operation
41、 2.3.12 virtual time the I 2 t divided by the square of the prospective breaking current NOTEThe virtual times usually stated for fuse links are the pre-arcing time and the operating time. 2.3.13 time/current characteristic a curve giving the virtual time (e.g.pre-arcing time or operating time) as a
42、 function of the prospective breaking current under stated conditions of operation 2.3.14 conventional non-fusing current (I nf ) a value of current specified as that which the fuse link is capable of carrying for a specified time (conventional time) without melting 2.3.15 conventional fusing curren
43、t (I f ) a value of current specified as that which causes operation of fuse link within a specified time (conventional time) 2.3.16 power loss of a fuse link the power loss in a fuse link carrying rated current under specified conditions, measured after the fuse link has attained a steady temperatu
44、re 2.3.17 recovery voltage the voltage which appears across the terminals of a fuse after the breaking of the current NOTEThis voltage may be considered in two successive intervals of time, one during which transient voltage exists (see2.3.18), followed by a second one during which the power-frequen
45、cy recovery voltage (see2.3.19) alone exists. I 2 tt 2 t 0 t 1 dt =BS1362:1973 BSI 03-1999 3 2.3.18 transient recovery voltage the recovery voltage during the time in which it has a significant transient character NOTE 1The transient voltage may be oscillatory or non-oscillatory or a combination of
46、both, depending on the characteristics of the circuit and the fuse. It includes the voltage shift of the neutral of a polyphase circuit. NOTE 2The transient recovery voltage in three-phase circuits is, unless otherwise stated, that which appears across the first pole to clear because this voltage is
47、 generally higher than that which appears across each of the other two poles. 2.3.19 power-frequency recovery voltage the recovery voltage after the transient voltage phenomena have subsided NOTEThe power-frequency recovery voltage may be referred to as a percentage of the rated voltage. 2.3.20 swit
48、ching voltage the maximum value of the voltage, expressed as a peak value, which appears across the terminals of a fuse due to the operation of the fuse link 2.3.21 time/current zone the time/current zone is the zone contained by the minimum pre-arcing characteristic and the maximum operating charac
49、teristic 3 Standard conditions for operation in service The fuse link shall be suitable for use under the following conditions. These conditions apply also to the tests, except where otherwise specified in clause8. NOTEWhere fuse links are to be used under conditions differing from these, the manufacturer should be consulted. 3.1 Ambient air temperature The ambient air temperature does not exceed40C, its mean value measured over a period of24h does not exceed35C and its mean value measured over a period of one year is lower. The lower limit of t
