1、BRITISH STANDARD BS EN 60654-2:1998 IEC654-2: 1979 Incorporating Amendments Nos.1 and2 to BS5967-2:1980 (Amendment No. 2 renumbers the BS as BS EN60654-2:1998) Operating conditions for industrial-process measurement and control equipment Part 2: Power The European Standard EN60654-2:1997 has the sta
2、tus of a British Standard ICS 25.040.40BSEN60654-2:1998 This British Standard, having been prepared under the directionof the Industrial-process Measurement and Control Standards Committee, was published under the authority ofthe Executive Board and comesinto effect on 30 September1980 BSI04-1999 IS
3、BN0 580 11554 2 Cooperating organizations The Industrial-process Measurement and Control Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following: British Gas Corporation British Industrial Measuring and Control Apparatus Manufactu
4、rers Association* British Steel Corporation Cbmpe* Control and Automation Manufacturers Association (BEAMA) Department of the Environment (Water Engineering Division including Water Data Unit) Department of Industry (Computers Systems and Electronics) Electrical, Electronic, Telecommunications and P
5、lumbing Union Electricity Supply Industry in England and Wales* Engineering Equipment Users Association* Institute of Measurement and Control* Institution of Gas Engineers Oil Companies Materials Association* Post Office Engineering Union Scientific Instrument Manufacturers Association* Sira Institu
6、te The organizations marked with an asterisk in the above list, together with the following, were directly represented on the Technical Committee entrusted with the preparation of this British Standard: British Pressure Gauge Manufacturers Association National Coal Board National Water Council Amend
7、ments issued since publication Amd. No. Date of issue Comments 8433 January1995 9959 April1998 Indicated by a sideline in the marginBSEN60654-2:1998 BSI 04-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Object 3 3 General 3 4 Electrical
8、power classification 3 5 Pneumatic power classification 7 Publications referred to Inside back coverBSEN60654-2:1998 ii BSI 04-1999 National foreword This British Standard has been prepared by Subcommittee GEL/65/1 (formerlyPCL/1) and is the English language version of EN60654-2:1997. It is identica
9、l with IEC654-2:1979, including amendment1:1992, published by the International Electrotechnical Commission (IEC). 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 Br
10、itish Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have
11、 had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN60654-2 August 1997 UDC 65.011.55.002.2-5: 53.083-83-85.004.26.001.2.001.33.004.12 (083.71) ICS 25.040.40 Supersedes HD 413.2 S2:1994 Descriptors:
12、 Industrial-process measurement and control, driven by electric and/or pneumatic energy, operating conditions, requirements, properties, definitions English version Operating conditions for industrial-process measurement and control equipment Part 2: Power (IEC60654-2:1979+A1:1992) Conditions de fon
13、ctionnement pour les matriels de mesure et commande dans les processus industriels Partie 2: Alimentation (CEI 60654-2:1979+A1:1992) Einsatzbedingungen fr Me-, Steuer- und Regeleinrichtungen in der industriellen Prozetechnik Teil 2: Energieversorgung (IEC 60654-2:1979+A1:1992) This European Standard
14、 was approved by CENELEC on 1997-07-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning
15、such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its ow
16、n language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Swe
17、den, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in an
18、y form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60654-2:1997 EEN60654-2:1997 BSI 04-1999 2 Foreword The text of the International Standard IEC60654-2:1979 and its amendment 1:1992, prepared by SC65A, System aspects of IEC TC65, Industrial-process measurement and control,
19、was approved by CENELEC as HD413.2 S2 on1994-03-08. This Harmonization Document was submitted to the formal vote for conversion into a European Standard and was approved by CENELEC as EN60654-2 on 1997-07-01. The following date was fixed: latest date by which the EN has to be implemented at national
20、 level by publication of an identical national standard or by endorsement (dop) 1998-06-01EN60654-2:1997 BSI 04-1999 3 1 Scope Part 2 of the standard gives the limiting values for power received by land-based and off-shore industrial-process measurement and control systems or parts of systems, durin
21、g operation. Maintenance and repair conditions are not considered. Operating conditions directly related to fire and explosion hazards and conditions related to nuclear radiation are likewise not considered. The influence quantities considered in this part are limited to those which may directly aff
22、ect the performance of process systems. Effects of the specific operating conditions on personnel are not within the scope of this part. Only operating conditions as such are considered: the resulting effects of these conditions on instrumentation are specifically excluded. This part establishes lim
23、it values, or sets of limit values, for the operating conditions listed. Other operating conditions, including those for which characteristics are difficult both to define and to measure, and for which adequate standards are not known to exist, will be covered in other publications. An example of an
24、 operating condition difficult to define is corrosive atmospheres, which are difficult to classify due to the wide variety and concentration of corrosive substances and combinations of substances which may be encountered. No classifications are recommended for hydraulic power supplies. In most insta
25、nces, a separate hydraulic supply is provided for each operating unit, or for a small group of units. The characteristics of the supply are engineered specifically to meet the requirements of the units being operated. Certain types of pressure regulators derive their operating power from the pressur
26、e of the fluid. Similarly, certain types of temperature regulators derive pressure for valve operation from thermal expansion of the fluid in the temperature-sensing elements. The power supply for this type of “self-operated” device is not considered within the scope of this standard. 2 Object The o
27、bject of Part 2 of the standard is to provide users and suppliers of industrial-process measurement and control systems and parts of such systems with a uniform listing and classification of the listed operating conditions related to power. This part is intended to serve as a basis for the preparati
28、on of comprehensive specifications for the listed operating conditions by the user and by the instrument-maker. One of the purposes of this part is to avoid problems which might result from neglecting the consideration of specific operating conditions affecting the performance of systems and parts o
29、f systems. An additional purpose of this part is to aid the choice of specific limit values for use in the development of test specifications for industrial-process measurement and control equipment. 3 General Part 2 of the standard considers the specific operating conditions related to power receiv
30、ed by systems, or parts of systems. These conditions are listed for electric power (see Clause4) and pneumatic power (see Clause5). Systems and parts of systems are rarely connected to power supply in storage or transport. Power conditions for calibration and test purposes are generally specified as
31、 a part of test specification. They are not within the scope of this standard. While this method results in a large number of possible combinations of operating conditions, it appears to represent the “real world”, where predictable relations between types of operating conditions do not exist. The s
32、everity of the various operating conditions is shown by limit values rather than by means of average values. These values cover usual ranges of operating conditions. It is recognized that extreme or special operating conditions exist where values are greater and/or less than the stated values. To ac
33、commodate this situation, “special” categories for the operating conditions are provided. Specifications for equipment to operate under “special” or extreme conditions are a matter for negotiation between user and supplier. Unless otherwise specified or indicated (e.g.transportation, seismic effects
34、), the conditions classified in this standard are meant to be permanent, and under these conditions the equipment shall perform normally in accordance with the defined specifications taking into account the specified power. 4 Electrical power classification 4.1 Definitions For the purpose of this st
35、andard only, the following definitions of terms relating to electrical energy supply are used: Power: the energy supplied to a system or elements of a system for process measurement and control. Power source: the primary source, usually a.c. mains, from which the systems power is derived.EN60654-2:1
36、997 4 BSI 04-1999 Power supply device: a separate unit which converts, regulates, rectifies, or otherwise modifies the supply from the primary power source to provide power suitable for a system or elements of a system for process measurement and control. Power supply: power source or power supply d
37、evice from which the industrial-process measurement and control system or elements of the system receive the energy in order to be able to operate. Steady-state power conditions: are defined as conditions persisting for more than0.2s. Transient power disturbances: are defined as disturbances, which
38、have a duration of0.2s or less. Power voltage: the voltage of the power supply as presented to an industrial-process measurement and control system or elements of system. Power frequency: the frequency of the power supply as presented to an industrial-process measurement and control system or elemen
39、ts of the system. Electrical energy for operation of systems may be provided by: direct connection to a single power source; connection to a power supply device, interposed between the power source and the system or element of a system: auxiliary stand-by or back-up power supply which provides for o
40、peration of the system or elements of the system in case of maintenance or failure of the main power supply. In this standard, operating conditions relating to the electrical power supply are classified only for steady-state conditions. Classification of operating conditions related to transient pow
41、er disturbances (disturbances with a duration of0.2s or less) are deferred. There appear to be no pertinent national standards defining suitable classifications. There are serious difficulties in defining and measuring transient conditions. Extreme voltage variations are of particular concern with r
42、espect to short-time under-voltage which may result in drop out of relay or equivalent circuits which may change control action, and with respect to sustained over-voltage which may result in possible deterioration or actual burn out of components. In this standard, there is no classification based
43、on the impedance of the power supply. The effect of the power supply impedance is taken into account by its effect on the power voltage under varying load conditions. Maximum voltages are the values which may occur under minimum-load conditions. Minimum voltages are the values which may occur under
44、full-load conditions. NOTEThis approach to power supply impedance is perhaps somewhat less than rigorous. However, it appears practicable. The definition of effective impedance, particularly for a.c., is difficult and of questionable significance for the purpose of system operation unless supported
45、by information regarding the character of the load impedance. The latter is beyond the scope of this standard. 4.2 A.C. power supply The characteristics of the a.c. power supply are listed separately: voltage (see Sub-clause4.2.1); frequency (see Sub-clause4.2.2); harmonic content (see Sub-clause4.2
46、.3); phase angle (for polyphase supplies) (see Sub-clause4.2.4); auxiliary supply switching time (for an auxiliary or back-up power supply) (see Sub-clause4.2.5). Extreme variations in a.c. power supply characteristics beyond the specified values can be experienced in field conditions. Power supply
47、specifications for these conditions are a matter for negotiation between user and supplier. 4.2.1 A.C. power voltage classes Power voltages are classified in accordance with the percentage variation of the voltage from its nominal value. Four sets of limit values are listed: Special: a.c. power volt
48、ages do not conform to Sub-clauses4.2.1.1, 4.2.1.2, 4.2.1.3 or4.2.1.4 above. NOTEA.C. voltages are in terms of r.m.s. values, measured at the point of supply to the equipment. The a.c. power voltage variation includes the effect of the power supply impedance together with variation of load (see Sub-
49、clause4.1). 4.2.2 A.C. power frequency The frequency variation is stated in per cent deviation from the nominal value. Three sets of limit values are listed: 4.2.2.1 0.2%. 4.2.2.2 1%. 4.2.2.3 5%. 4.2.1.1 1% Class a.c.1. 4.2.1.2 10% Class a.c.2. 4.2.1.3 +10% to15% Class a.c.3. 4.2.1.4 +15% to20% Class a.c.4.EN60654-2:1997 BSI 04-1999 5 Special: a.c. power frequency does not conform to Sub-clauses4.2.2.1, 4.2.2.2 or4.2.2.3 above. 4.2.3 Harmonic content of an a.c. power supply For this standard, only voltages which are true
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