1、BRITISH STANDARD BS 5164:1975 Specification for Indirect-acting electrical indicating and recording instruments and their accessories UDC 621.317.7.087.6BS5164:1975 This British Standard having beenapproved by the Electrical Industry Standards Committee, was published under the authorityof the Execu
2、tive Boardon 28 February 1975 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference ELE/13 Draft for comment 69/27008 ISBN 0 580 08269 5 Co-operating organizations The Electrical Industry Standards Committee under whose supervision this British Standard wa
3、s prepared consists of representatives from the following Government departments and scientific and industrial organizations: 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
4、 committee entrusted with the preparation of this British Standard: Associated Offices Technical Committee Department of the Environment Association of Consulting Engineers* Department of Trade and Industry* Association of Manufacturers of Domestic Electric Cable Makers Confederation Electrical Appl
5、iances Electrical Contractors Association Association of Mining Electrical and Electrical Contractors Association of Scotland Mechanical Engineers Electrical Research Association Association of Supervisory and Executive Electricity Supply industry in England and Engineers* Wales* British Electrical
6、and Allied Manufacturers Electronic Engineering Association Association Engineering Equipment Users Association* British Electrotechnical Approvals Board for Institution of Electrical Engineers* Household Equipment Institution of Electrical and Electronics British Non-Ferrous Metals Federation Techn
7、ician Engineers British Radio Equipment Manufacturers Lighting Industry Federation Limited Association Ministry of Defence* British Railways Board National Inspection Council for Electrical British Steel Corporation Installation Contracting Crown Agents for Oversea Governments and Oil Companies Mate
8、rials Association Administrations Post Office* Department of Employment (HM Factory South of Scotland Electricity Board Inspectorate) British Industrial Measuring and Control Scientific Instrument Manufacturers Apparatus Manufacturers Association Association National Physical Laboratory (Department
9、of Department of Trade and Industry (British Trade and Industry) Calibration Service) Electrical Power Engineers Association Amendments issued since publication Amd. No. Date of issue CommentsBS5164:1975 BSI 12-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1
10、2 Definitions 1 3 Classification 10 4 Permissible intrinsic errors and reference conditions for instruments related to the measured quantity 10 5 Permissible intrinsic errors and reference conditions related to time-keeping 12 6 Permissible intrinsic errors and reference conditions for accessories 1
11、3 7 Permissible limits of variations 13 8 Permissible limits of variations for accessories 17 9 Electrical and mechanical requirements of instruments and accessories 18 10 Constructional requirements for instruments and accessories 21 11 Markings and symbols for instruments and accessories 21 12 Cat
12、egories of test 24 Appendix A Concepts 30 Figure 1 Common mode test circuits 17 Figure 2 Effective range 8 A to 50 A 30 Figure 3 Effective range 80 V to 110 V 30 Figure 4 Effect of temperature 31 Figure 5 Effect of temperature 32 Figure 6 Effect of frequency 32 Table 1 Limits of intrinsic error of i
13、nstruments related to the measured quantity expressed as a percentage of the fiducial value 10 Table 2 Preconditioning of instruments 11 Table 3 Reference conditions for the influence quantities related to the measured quantity 11 Table 4 Additional reference conditions related to the measured quant
14、ity for recording instruments 12 Table 5 Limits of intrinsic error related to time-keeping expressed as a percentage of the true elapsed time 12 Table 6 Reference conditions for the influence quantities related to time-keeping 12 Table 7 Limits of intrinsic error of an accessory expressed as a perce
15、ntage of the fiducial value 13 Table 8 Normal values of the limits of the nominal range of use and allowable variation expressed as a percentage of the measuring class index 14 Table 9 Variation due to mounting on a ferromagnetic panel 15 Table 10 Normal values of the limits of the nominal range of
16、use related to time-keeping 17 Table 11 Value of test voltage 20 Table 12 Examples of marking related to the reference conditions and nominal ranges of use for instruments and accessories 25 Table 13 Symbols for marking instruments and accessories 25 Table 14 Examples of limits of effective range an
17、d fiducial values 30 Publications referred to Inside back coverBS5164:1975 ii BSI 12-1999 Foreword This British Standard has been prepared under the authority of the Electrical Industry Standards Committee. It deals with electrical instruments in which the indicating or recording device is driven by
18、 a motor or other device controlled electromechanically or electronically by the measured quantity, in contradistinction to direct-acting instruments in which the indicating or marking device is mechanically connected to and actuated by the moving element. It is the first British Standard dealing wi
19、th indirect-acting electrical instruments to be published, and is based, wherever possible, on IEC Publication 484 “Indirect acting measuring instruments”, in the preparation of which the UK has fully participated. While the international recommendation covers instruments of both the electrical bala
20、nce and mechanical balance types, the British Standard has been restricted to the former, because the small interest in the mechanical balance type in the UK does not justify the complication of incorporating it satisfactorily. In accordance with international practice, the concept of accuracy class
21、 has been used throughout this British Standard. The performance of instruments is characterized by a number, termed the class index, which designates the upper limit of instrument error, expressed in per cent when the instrument is used under reference conditions. Instruments of the direct-acting t
22、ype are dealt with in BS89 “Direct-acting electrical indicating instruments”, Part1: “Single purpose direct acting electrical indicating instruments and their accessories” and BS90 “Direct-acting electrical recording instruments and their accessories”. A British Standard does not purport to include
23、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. Summary of pages This document comprises a front cover, an inside front cover, pages i a
24、nd ii, pages1 to 34, an inside back cover 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.BS5164:1975 BSI 12-1999 1 1 Scope 1.1 This British Standard specifies requ
25、irements for indirect-acting electrical instruments using a null balance method which need an auxiliary electrical power supply. These instruments may indicate the value of the measured quantity or record the value of the measured quantity as a function of time. Instruments may combine both these fu
26、nctions. 1.2 This standard also applies to electrically operated measuring equipments, provided that the electrically operated measuring instrument (receiver) only is considered and that the relationship between the non-electrical and the electrical quantity is known. 1.3 This standard does not appl
27、y to: a) devices comprising a direct-acting indicating and/or recording instrument energized by a measuring amplifier; b) electrically operated measuring equipment when the relationship between the non-electrical and the electrical quantity is not known; c) control apparatus even though it includes
28、indicating or recording instruments; d) indirect-acting electrical instruments in which the measured quantity is presented in the form of digits, codes, punched cards, etc.; e) position follower instruments; f) recording instruments in which the chart movement is a function of a quantity other than
29、time; g) integrating instruments or auxiliary integrating devices incorporated in instruments within the scope of this standard. 1.4 This standard does not contain requirements for protection against environmental conditions. 1.5 This standard does not specify requirements concerning dimensions of i
30、nstruments or detailed requirements concerning terminal markings and diagrams of connection. NOTEThe titles of the British Standards referred to in this standard are listed on the inside back cover. 2 Definitions For the purpose of this British Standard, the following definitions and those of BS4727
31、-1:Group 04 apply. 2.1 General terms 2.1.1 electrically operated measuring instrument (receiver) an electrically operated measuring instrument used as the indicating and/or recording means of an electrically operated measuring equipment 2.1.2 integrating instrument an instrument which indicates and/
32、or records the time integral of a measured quantity 2.1.3 accessory Circuit element (instrument transformer, resistor, impedance, etc.) which is associated with the measuring instrument either in a permanent or in a non-permanent manner. 2.1.3.1 interchangeable accessory an accessory having its own
33、properties and accuracy, these being independent of those of the instrument with which it may be associated NOTEAn accessory is considered to be interchangeable when its rated characteristics are known and marked and are sufficient to enable its errors and variations to be determined without using t
34、he associated instrument. For example, a shunt whose adjustment takes into account an instrument current which is not negligible and which is known is considered to be interchangeable. 2.1.3.2 accessory of limited interchangeability an accessory adjusted to take into account the electrical character
35、istics of a type of instrument, e.g.when the instrument current is not negligible in comparison with the current of a shuntBS5164:1975 2 BSI 12-1999 in these circumstances, the standard applies to any combination of instrument and accessory of the relevant types of a manufacturer unless he states ot
36、herwise. Each component of the combination has its own class index instruments intended to be used with these accessories are also considered to have limited interchangeability 2.1.3.3 non-interchangeable accessory an accessory adjusted during manufacture to take into account the electrical characte
37、ristics of a specific instrument. The standard then applies to the particular combination of instrument and accessory and the accessory has no class index of its own 2.1.4 instrument with contacts an instrument in which the moving element operates contacts when it arrives at certain positions 2.1.5
38、instrument with magnetic screening an instrument shielded against the influence of external magnetic fields by ferromagnetic material 2.1.6 instrument with electrostatic screening an instrument provided with screens which are intended to protect it against the influence of external electric fields 2
39、.1.7 self-contained instrument an instrument in which all accessory apparatus necessary to cause the indication to correspond with the value of the measured quantity is permanently connected and either enclosed in or permanently attached to the instrument case 2.1.8 multipurpose instrument an instru
40、ment intended for the measurement of more than one kind of electrical quantity, e.g.an instrument measuring current and voltage 2.1.9 distortion factor the ratio of the r.m.s. value of the harmonic content to the r.m.s. value of the nonsinusoidal quantity 2.1.10 percentage ripple content the percent
41、age ripple content of a d.c. measured quantity is 2.1.11 continuous service use of an instrument and/or accessory continuously at its rated current, rated voltage and rated frequency without its failing to comply with all the relevant clauses of this standard 2.1.12 measured quantity input circuit t
42、he circuit, internal to the instrument, which, when energized by a voltage or a current, being a function of the measured quantity, is the prime factor in producing the differential quantity by which the actuating and positioning of the indicating or recording device is determined NOTEThis term is h
43、erein abbreviated to “input circuit”.BS5164:1975 BSI 12-1999 3 2.1.13 measured quantity external circuit the complete circuit, external to the instrument, from which is obtained a measured quantity or a quantity proportional thereto NOTEThis term is herein abbreviated to “external circuit”. 2.1.14 a
44、uxiliary circuit an internal circuit, other than the input circuit, necessary for the operation of the instrument 2.1.15 auxiliary power supply the power supply which energizes the auxiliary circuit 2.2 Description of indirect-acting instruments 2.2.1 According to their method of operation 2.2.1.1 p
45、otentiometric instrument an instrument in which an input voltage is compared with a voltage of controlled value, e.g.by a measuring potentiometer, having a setting corresponding to the position of the indicating or recording device 2.2.1.2 bridge instrument an instrument in which the input quantity
46、(resistance or impedance) is connected in at least one arm of a measuring bridge and is compared with a reference resistor or impedance, the adjustment of the bridge being related to the position of the indicating or recording device 2.2.2 According to the recording mechanism 2.2.2.1 single instrume
47、nt an instrument having only one servomechanism 2.2.2.2 multiple instrument an instrument having more than one servomechanism and being able to measure simultaneously different quantities corresponding to different external circuits 2.2.2.3 single-channel instrument an instrument, the input circuit(
48、s) of which is (are) intended for connection to one external circuit 2.2.2.4 multiple-channel instrument an instrument, the input circuit(s) of which is (are) intended for connection successively to different external circuits by cyclic switching 2.2.3 According to the form of chart 2.2.3.1 strip ch
49、art recording instrument an instrument in which the chart is a strip driven as a function of time by the chart-driving mechanism, the chart being automatically stored or emerging from the instrument through an aperture 2.2.3.2 drum chart recording instrument an instrument in which the chart is wrapped as a single turn around a cylindrical drum and driven as a function of time by the chart-driving mechanismBS5164:1975 4 BSI 12-1999 2.2.3.3 disc chart recording instrument an instrument in which the chart is a disc driven as a functio
