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1、BRITISH STANDARD BS 1650:1971 Incorporating Amendment No. 1 Specification for Capacitors for connection to power-frequency systems UDC 621.319.4:621.31 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:26:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1650:1971 This British Standard, havin
2、g been approved by the Electrical Industry Standards Committee, was published under the authority of the Executive Board on 29 October 1971 BSI 09-1999 Part 1 first published May 1950 Parts 2 and 3 first published April 1952 First revision March 1955 Second revision January 1963 Third revision Octob
3、er 1971 The following BSI references relate to the work on this standard: Committee reference ELE/46 Draft for comment 69/2214 ISBN 580 06716 5 Co-operating organizations The Electrical Industry Standards Committee under whose supervision this British Standard was prepared consists of representative
4、s from the following Government departments and scientific and industrial organizations: Associated Offices Technical Committee Association of Consulting Engineers* Association of Manufacturers of Domestic Electrical Appliances Association of Mining Electrical and Mechanical Engineers Association of
5、 Supervisory and Executive Engineers* British Electrical and Allied Manufacturers Association* British Radio Equipment Manufacturers Association British Railways Board Crown Agents for Oversea Governments and Administrations Department of Employment and Productivity Electric Cable Makers Confederati
6、on Electrical Contractors Association (Incorporated)* Electrical Contractors Association of Scotland Electrical Research Association* Electricity Council, the Central Electricity Generating Board and the Area Boards in England and Wales* Electronic Engineering Association Engineering Equipment Users
7、 Association Institution of Electrical Engineers* Lighting Industry Federation Limited Ministry of Defence Ministry of Defence, Army Department Ministry of Defence, Navy Department Ministry of Public Building and Works Ministry of Technology Municipal Passenger Transport Association (Incorporated) N
8、ational Inspection Council for Electrical Installation Contracting National Physical Laboratory (Ministry of Technology) Oil Companies Materials Association Post Office Public Transport Association (Incorporated) South of Scotland Electricity Board The scientific and industrial organizations marked
9、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: British Fractional Horsepower Electric Motor Manufacturers Association Amendments issued since publication Amd. No.Date of issueComment
10、s 6461February 1991Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:26:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1650:1971 BSI 09-1999i Contents Page Co-operating organizationsInside font cover Forewordii 1General1 1.1Scope1 1.2Definitions1 1.3Cl
11、assification2 1.4Rating plate3 2Safety requirements4 2.1Discharge device4 2.2Container connection4 3Quality requirements and tests4 3.1Standard temperatures for testing4 3.2Routine tests4 3.3Type tests5 3.4Insulation levels and test voltages8 4Permissible overloads8 4.1Maximum permissible voltage8 4
12、.2Maximum permissible current8 5Installation and operation8 Appendix A Guide for installation and operation9 Appendix B Partial discharge measurements on capacitors10 Appendix C Determination of reactive output15 Appendix D Method of test for efficacy of discharge device15 Appendix E Effect of harmo
13、nics on capacitor loading17 Appendix F Particulars to be given with enquiry or order18 Table 1 Maximum ambient temperatures2 Table 2 Insulation levels for the range of voltages below Um = 100 kV8 Table 3 Table deleted9 Table 4 Reactive outputs for different connections16 Licensed Copy: sheffieldun s
14、heffieldun, na, Fri Nov 24 06:26:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1650:1971 ii BSI 09-1999 Foreword This standard makes reference to the following British Standard: BS 923, Guide on high-voltage testing techniques. This revision of BS 1650, issued under the authority of the Electrica
15、l Industry Standards Committee, follows closely the technical content of Publication 70, 2nd Edition 1967, of the International Electrotechnical Commission. In this revision, capacitors for the starting and running of single-phase motors are no longer included. A separate standard is to be issued on
16、 this subject. Some additional information is given in appendices and attention is directed to these. This standard is amended following the endorsement by CENELEC of IEC 871-1 as HD 525-1 S1 to remove references to capacitors intended for a.c. power systems having rated voltages above 660 V which a
17、re addressed by the reference document. 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 a British Standard does not of itself confer immunity from legal obligations. S
18、ummary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 18 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. License
19、d Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:26:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1650:1971 BSI 09-19991 1 General 1.1 Scope This British Standard applies to capacitors intended to be used for power factor correction on a.c. power systems having rated voltages up to 660 V operat
20、ing at frequencies up to and including 100 Hz. It applies to capacitors intended for use within ambient temperature limits of 40 C and + 50 C and at altitudes not exceeding 1 000 m. The specification does not apply to the following types of capacitor, which may form the subject of separate British S
21、tandards: Self-healing capacitors. Series capacitors. Capacitors for use in tubular fluorescent, mercury and sodium discharge lamp circuits. Starting and running capacitors for single-phase motors. 1.2 Definitions For the purposes of this British Standard the following definitions apply: 1.2.1 capac
22、itor element (or element) an indivisible part of a capacitor consisting of electrodes separated by a dielectric 1.2.2 capacitor unit (or unit) an assembly of one or more capacitor elements in a single container with terminals brought out 1.2.3 capacitor bank (or bank) a group of units, connected ele
23、ctrically to each other, e.g. a three-phase bank may be composed of three single-phase units 1.2.4 capacitor equipment an assemblage of a capacitor unit or units together with protective and/or control gear suitable for connection to a circuit 1.2.5 capacitor used where it is not necessary to lay pa
24、rticular stress upon the different meanings of the terms such as “capacitor unit”, “capacitor bank”, or “capacitor equipment” 1.2.6 discharge device a device connected across the terminals or busbars, or built into the capacitor unit, capable of reducing the residual voltage to a safe value after th
25、e capacitor has been disconnected from the supply 1.2.7 rated voltage, Un the r.m.s. value of the voltage at rated frequency between terminals, which the capacitor is intended to withstand continuously for capacitors consisting of one or more separate circuits (e.g. single-phase units intended for u
26、se in polyphase connection, or polyphase units with separate circuits), Un refers to the rated voltage of each separate capacitor circuit for polyphase capacitors with internal electrical connections between phases, Un refers to the line-to-line voltage 1.2.8 insulation level the insulation level of
27、 a capacitor unit is the combination of test voltage values (both power-frequency and impulse) which the insulation between the line terminals and the container is required to withstand Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:26:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1650
28、:1971 2 BSI 09-1999 the insulation level of a capacitor bank is that combination of test voltage values (both power-frequency and impulse) which the insulation between the line terminals (or terminal) of the bank and any metal which is intended to be earthed, is required to withstand 1.2.9 rated out
29、put the reactive output (kVAr) at rated voltage and rated frequency for which the capacitor is designed. (The effect of harmonics on capacitor loading is dealt with in Appendix E.) 1.2.10 rated current the r.m.s. current through one line terminal at rated voltage and rated frequency 1.2.11 capacitor
30、 losses the active power consumed by a capacitor NOTEUnless otherwise stated, the capacitor losses will be understood to include losses in fuses and discharge devices forming an integral part of the capacitor. 1.2.12 tangent of the loss angle (tan ) the capacitor losses divided by the reactive outpu
31、t of the capacitor 1.2.13 highest system voltage, Um the highest r.m.s. line-to-line voltage which can be sustained under normal operating conditions at any time and at any point of the system. It excludes temporary variations due to fault conditions or the sudden disconnection of large loads 1.2.14
32、 ambient air temperature the temperature of the air at the proposed location of the capacitor 1.2.15 cooling air temperature the temperature of the cooling air measured at the hottest position in the bank midway between two units. If only one unit is involved it is the temperature measured at a poin
33、t approximately 0.3 m away from the capacitor container and at two thirds of the height from its base 1.2.16 container temperature rise the difference between the temperature of the hottest point of the container and the ambient air temperature 1.3 Classification This specification applies to capaci
34、tors intended for use within ambient air temperature limits of 40 C and + 50 C and at altitudes not exceeding 1 000 m. For this purpose capacitors are classified in temperature categories, each being characterized by both the lowest ambient air temperature at which the capacitor may be energized, ch
35、osen from three values, 40 C, 25 C and 10 C, and the upper limit of ambient air temperature at which the capacitor may be operated, as defined in Table 1. Table 1 Maximum ambient temperatures Upper limit of category ambient air temperature Maximum ambient air temperature Mean over 1 h Mean over 24 h
36、 Mean over 1 year CCCC 40 (temperate)403020 45 (tropical)454030 50 (super-tropical)504535 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:26:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1650:1971 BSI 09-19993 Typical temperature categories are: 40/+ 40 C, 25/+ 40 C, 10/+ 40 C, 10/+ 45
37、C. 1.4 Rating plate 1.4.1 The following information shall be given on the rating plate or container of each capacitor. However, for small units where it is impracticable to indicate all the items on the rating plate, items 8) and 9) may be stated in an instruction sheet. 1) Manufacturers name or tra
38、de mark. 2) The number of this British Standard, i.e. BS 1650. 3) Serial number. 4) Rated output in kVAr. 5) Rated voltage Un in volts or kilovolts. 6) Rated frequency in Hertz. 7) Temperature category (see 1.3). 8) Connection symbol (see 1.4.2). 9) Discharge device(s), fitted or not fitted. 1.4.2 T
39、he type of connection shall be indicated by the following symbols: Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:26:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1650:1971 4 BSI 09-1999 2 Safety requirements NOTEThe purchaser should specify, at the time of ordering, any special requir
40、ements with regard to safety which are not covered by the following clauses. 2.1 Discharge device 2.1.1 Capacitor equipments shall be provided with a directly connected discharge device, unless they are to be connected directly to other electrical equipment providing a discharge path without having
41、a disconnecting switch, fuse cut-out or series capacitor interposed. NOTEThe purchaser should inform the supplier if the latter condition applies. 2.1.2 The discharge device (or the other electrical equipment mentioned in 2.1.1) shall reduce the residual voltage from the crest value of the rated vol
42、tage Un to 50 V or less within 1 min after the capacitor is disconnected from the source of supply (but see Note 3). NOTE 1Where capacitor units are connected in series, discharge devices fitted to each unit may not be adequate to ensure compliance with the requirements of this clause, owing to the
43、cumulative effect of the residual voltages. If the supply voltage is so high that this occurs, then an additional external discharge device will be necessary and should be directly connected across the capacitor equipment or bank. NOTE 2A discharge device is not a substitute for short-circuiting the
44、 capacitor terminals together and to earth before handling. A residual charge may sometimes be left on the interconnections of series-connected capacitor units, due to blown fuses, interrupted internal connections or non-linear behaviour of the dielectric resulting from over-stressing. These interco
45、nnections, therefore, should be short-circuited to earth before handling. NOTE 3Special discharge arrangements may be necessary when capacitors are switched off and on at very short intervals (see A.5). 2.2 Container connection Provision shall be made on the metal container of the capacitor for a co
46、nnection of adequate size to be made to permit reliable and permanent connection of the container to earth or other point of fixed potential. 3 Quality requirements and tests 3.1 Standard temperatures for testing All the tests specified, except where otherwise stated or agreed, shall be carried out
47、within the ambient temperature range of 15 C to 35 C inclusive. If corrections have to be made, the reference temperature shall be 20 C. 3.2 Routine tests All capacitors shall withstand the following routine tests, in the order specified below: 1) output test (see 3.2.1); 2) voltage test between ter
48、minals (a.c. or d.c.) (see 3.2.2); 3) a.c. voltage test between terminals and container (dry test) (see 3.2.3); 4) discharge device test, if required (see 3.2.4); 5) final output test (see 3.2.5). The following test may be carried out at any convenient point in the testing sequence: 6) sealing test
49、(see 3.2.6). 3.2.1 Output test. The output shall be measured using a method which excludes errors due to harmonics and to accessories. This measurement shall demonstrate that at the rated voltage and frequency the output of a capacitor, a capacitor bank or an equipment is not less than the rated output and not more than 110 % of the rated output. The rated output of a capacitor unit forming part of a bank shall be not less than 95 % and not greater than 110 % of the nominal rated output of the unit. Two methods of making thes
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