BS EN 60654-3-1984 Operating conditions for industrial-process measurement and control equipment - Mechanical influences《工业过程测量和控制设备工作条件 机械影响》.pdf

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1、BRITISH STANDARD BS EN 60654-3:1998 IEC654-3: 1983 Incorporating Amendment No.1 to BS5967-3:1984 (renumbers the BS as BS EN60654-3:1998) Operating conditions for industrial-process measurement and control equipment Part 3: Mechanical influences The European Standard EN 60654-3:1997 has the status of

2、 a British Standard ICS 25.040.40BSEN60654-3:1998 This British Standard, having been prepared under the directionof the Industrial-process Measurementand Control Standards Committee, was published under the authority ofthe Board of BSI and comes intoeffect on 31 May1984 BSI 04-1999 ISBN 0 580 13854

3、2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Industrial-process Measurement and Control Standards Committee (PCL/-) to Technical Committee PCL/1 upon which the following bodies were represented: British Gas Corporation British Press

4、ure Gauge Manufacturers Association Department of Energy, Gas Standards Electricity Supply Industry in England and Wales Energy Industries Council Engineering Equipment and Materials Users Association Gambica (Beama Ltd.) Institution of Gas Engineers National Coal Board STC Water Regulations and Fit

5、tings Scheme Amendments issued since publication Amd. No. Date of issue Comments 9956 April 1998 Indicated by a sideline in the marginBSEN60654-3:1998 BSI 04-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Object 3 3 General 3 4 Vibrations 3

6、 5 Shock 5 6 Other mechanical stresses 6 Appendix A Seismic effects (earthquakes) 8 Annex ZA (normative) Normative references to international publications withtheir corresponding European publications 10 Figure 1 Peak displacement with low-frequency vibrations 6 Figure 2 Peak displacement with high

7、-frequency vibrations 7 Figure 3 Velocity 7 Table I Classes of low-frequency vibrations 4 Table II Classes of high-frequency vibration 4 Table III Classes of vibrational severity 5 Table IV Classes of vibration time 5 Table V Preferred acceleration values a 5 Table VI Preferred duration values t 5 T

8、able VII Preferred values of height of free-fall 5 Table VIII Preferred values of shock repetition rates 6 Publications referred to Inside back coverBSEN60654-3:1998 ii BSI 04-1999 National foreword This British Standard has been prepared by Subcommittee GEL/65/1 (formerlyPCL/1) and is the English l

9、anguage version of EN60654-3:1997. It is identical with IEC654-3:1983 published by the International Electrotechnical Commission (IEC). Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publicati

10、ons with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or using the “Find” facility of the BSI Standa

11、rds Electronic Catalogue. 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. Summary of page

12、s This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to10, 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 insid

13、e front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN60654-3 August 1997 UDC62-5.004.2 ICS25.040.40 Supersedes HD413.3 S1:1987 Descriptors: Industrial-process measurement and control, operating conditions, mechanical influences, shocks, vibrations, seismic effects English version Operat

14、ing conditions for industrial-process measurement and control equipment Part3: Mechanical influences (IEC60654-3:1983) Conditions de fonctionnement pour les matriels de mesure et commande dans les processus industriels Partie3:Influencesmcaniques (CEI60654-3:1983) Einsatzbedingungen fr Me-, Steuer-u

15、nd Regeleinrichtungen in der industriellen Prozetechnik Teil3:MechanischeEinflsse (IEC60654-3:1983) This European Standard was approved by CENELEC on1997-07-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Stand

16、ard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning 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, Fren

17、ch, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own 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,

18、Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektro

19、technische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN60654-3:1997 EEN60654-3:1997 BSI 04-1999 2 Foreword The text of the International Standard IEC60654-3:19

20、83, prepared by SC65A, System aspects, of IEC TC65, Industrial-process measurement and control, was approved by CENELEC as HD413.3 S1 on1986-02-27. This Harmonization Document was submitted to the formal vote for conversion into a European Standard and was approved by CENELEC as EN60654-3 on1997-07-

21、01. The following date was fixed: Annexes designated “normative” are part of the body of the standard. In this standard, Annex ZA is normative. Annex ZA has been added by CENELEC. latest date by which the EN has to be implemented at national level by publication of an identical national standard or

22、by endorsement (dop) 1998-06-01EN60654-3:1997 BSI 04-1999 3 1 Scope Part3 of the standard considers the specific operating conditions of vibration, shock, seismic and mechanical stress conditions to which land-based, and off-shore, industrial-process measurement and control systems or parts of syste

23、ms may be exposed during operation, storage or transportation. Maintenance and repair conditions are excluded from consideration in this Part3. The operating influences considered in this part are limited to those which may directly affect performance of process measurement and control systems. Effe

24、cts of the specific operating conditions on personnel are not within the scope of this part. The appropriate values of the physical parameters listed here should be used to describe local environments in which equipment is expected to operate, be transported and stored. Only conditions as such are c

25、onsidered; the effects of these conditions on instruments performance are specifically excluded. IEC Publication68: Basic Environmental Testing Procedures gives the basic test conditions for vibration and shock. This part establishes a list of selected limit values for the operating conditions. NOTE

26、Similar questions are at present being studied by Technical Committee No.75: Classification of Environmental Conditions. Upon the issue of this committees publication, the present publication should be reconsidered. 2 Object The object of Part3 of the standard is to provide users and suppliers of in

27、dustrial-process measurement and control systems and parts of such systems with a uniform listing and classification of mechanical influences. The specified conditions to which equipment may be exposed during operation, storage, handling and transportation are included. Conditions for transportation

28、 are for equipment parts in suitable packages with appropriate locking and clamping devices to prevent damage, as well as for complete systems mounted in mobile units. The listed operating conditions are intended to serve as a basis for comprehensive specifications. One of the purposes of this part

29、is to minimize problems which might result from neglecting considerations of specific operating conditions affecting performance of systems and parts of systems. An additional purpose of this part is to aid the choice of specific limit values for use in the development of evaluation specifications f

30、or industrial-process measurement and control equipment. 3 General Part3 of the standard considers the specific operating conditions of vibration, shock, seismic effects, and mechanical stress. The conditions of vibration are classified by severity levels of acceleration and displacement in low and

31、high frequency ranges, and by time of occurrence. For conditions of shock, a list is made of values from which selected combinations can be made to describe the local environment. Seismic effects are not classified but included as Appendix A in which the scales of Richter and Mercalli-Cancani are co

32、mpared and explained. While the above results in a large number of possible combinations of operating conditions, this appears to represent the “real world”, where predictable relations between types of operating conditions do not exist. It is recognized that extreme or special mechanical environmen

33、tal conditions exist where values are greater and/or less than the stated values. Specifications for equipment to operate under special or extreme conditions are a matter for negotiation between supplier and user. 4 Vibrations The criteria to be used for classifying a vibrational environment for ind

34、ustrial-measurement and control equipment are very dependent on the kind or nature of the equipment such as mass, size, mechanical parts, electronic components, wiring, specific functional sensitivity, etc. As an example, a small mass such as the inside connections to an integrated circuit is not in

35、fluenced by large amplitude1 Hz oscillations, whereas high acceleration levels of high frequency vibrations could damage these connections. On the other hand, large masses can be more easily damaged by lower frequency vibrations since they cannot follow the high frequency in practice. The way we wis

36、h to categorize the kind of influence on equipment that is thought to be significant such as, direct damage, long-term damage (fatigue), measurement inaccuracy, etc., should also be taken into account. Vibration usually has an undesirable effect on industrial-process measurement and control equipmen

37、t. The degree of this undesirable effect can be expressed by the magnitude of the highest force that might be evoked in some critical part or connection, or can be expressed by the kinetic energy that different masses of an instrument are imparted with and braked off, at any one moment. Or again it

38、could be expressed by the amount of energy imparted per unit of time, in other words, the amount of power.EN60654-3:1997 4 BSI 04-1999 Because of the difficulty, as outlined above, of classifying vibrational effects, the historical approach has been taken to depict a vibrational effect by a constant

39、 amplitude up to an arbitrary cross-over frequency and a constant acceleration beyond this frequency. An additional classification was added on the basic philosophy of constant kinetic energy (see Sub-clause4.3). Local sinusoidal vibrational environment is expressed by combinations of the following

40、interrelated parameters: frequency of oscillation f in hertz, peak acceleration a in metres per second squared, peak displacement s in millimetres, and maximum velocity v in metres per second. The relationships are defined by the formulae: Apart from the sinusoidal vibration, random vibrations frequ

41、ently occur in industrial-process applications. These environments, which are not described in this standard, are under consideration. 4.1 Low-frequency vibrations The first graph (Figure 1) illustrates the low- frequency classes ranging from0.1 Hz to150 Hz. This nomogram is intended to cover the mo

42、st common vibrational spectrum found within industrial environments and in transportation. The severity criteria chosen to present the different vibration levels are lines of constant peak displacement below the frequency of8 Hz to9 Hz, and lines of constant acceleration above the frequency of8 Hz t

43、o9 Hz. Seven classes have been identified in this frequency band. 4.2 High-frequency vibrations The second nomogram (Figure 2) illustrates the higher frequency vibration conditions ranging from10 Hz to10000 Hz. In this range, it has also been common practice to express vibration levels with lines of

44、 constant peak displacement below frequencies of57 Hz to62 Hz, and lines of constant acceleration above these frequencies. Six classes have been identified in this frequency band. Table I Classes of low-frequency vibrations Table II Classes of high-frequency vibration 4.3 Vibrational severity 1) For

45、 practical purposes in industry, it is important to express the severity of vibration according to its effect on measurement and control equipment particularly if the equipment is installed in the vicinity of the vibration source. Neither a constant amplitude line nor a constant acceleration line ov

46、er a broad frequency range can represent a constant vibrational severity level. Constant velocity lines were chosen as the most useful means to represent vibrational severity 1)levels because the kinetic energy imparted on or braked off any mass m is mv 2 , so that constant velocity lines represent

47、constant kinetic energy lines of a mass m. Four severity classes have been identified. Class Peak displacement s below8 Hz to9 Hz Peak acceleration a above8 Hz to9 Hz (mm) (m/s 2 ) V.L.1 15 50 ( 5.0 g) where g is the acceleration due to gravity on Earth. Class Peak displacement s below57 Hz to62 Hz

48、Peak acceleration a above57 Hz to62 Hz (mm) (m/s 2 ) V.H.1 0.35 50 ( 5.0 g) where g is the acceleration due to gravity on Earth. 1) This term “severity” is used in this standard with a different acceptation than that used in clause5 of IEC Publication68-2-6: Basic Environmental Testing Procedures, P

49、art2: Tests Test Fc and Guidance: Vibration (Sinusoidal), where a vibration severity is given by the combination of the values of frequency range, vibration amplitude, and endurance duration, each value being chosen from preferred lists.EN60654-3:1997 BSI 04-1999 5 Table III Classes of vibrational severity 4.4 Vibration time classes The vibration classes as described in Sub-clauses4.1, 4.2 and4.3 do not specify the time duration of the vibration conditions. Since vibration can occur over various time periods, the occur