1、BRITISH STANDARDBS EN 60947-5-9:2007Low-voltage switchgear and controlgear Part 5-9: Control circuit devices and switching elements Flow rate switchesICS 29.130.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48
2、g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 60947-5-9:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2008 BSI 2008ISBN 978 0 580 61338 8National forewordThis British Standard is the UK implementation o
3、f EN 60947-5-9:2007. It is identical to IEC 60947-5-9:2006.The UK participation in its preparation was entrusted by Technical Committee PEL/17, Switchgear, controlgear, and HV-LV co-ordination, to Subcommittee PEL/17/2, Low voltage switchgear and controlgear.A list of organizations represented on th
4、is committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda
5、issued since publicationDate CommentsEUROPEAN STANDARD EN 60947-5-9 NORME EUROPENNE EUROPISCHE NORM November 2007 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue
6、de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60947-5-9:2007 E ICS 29.130.20 English version Low-voltage switchgear and controlgear - Part 5-9: Control circuit devices and switching element
7、s - Flow rate switches (IEC 60947-5-9:2006) Appareillage basse tension - Partie 5-9: Appareils et lments de commutation pour circuit de commande - Dtecteurs de dbit (CEI 60947-5-9:2006) Niederspannungsschaltgerte - Teil 5-9: Steuergerte und Schaltelemente - Durchflussmengenschalter (IEC 60947-5-9:20
8、06) This European Standard was approved by CENELEC on 2007-09-01. 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 bibliographi
9、cal 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, French, German). A version in any other language made by translation under the responsibility of a
10、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, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hunga
11、ry, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 60947-5-9:2007 2 Foreword The text of document 17B/1500/FDIS, future edition 1 of IEC 60947-5-9, prepared b
12、y SC 17B, Low-voltage switchgear and controlgear, of IEC TC 17, Switchgear and controlgear, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60947-5-9 on 2007-09-01. This standard is to be used in conjunction with EN 60947-1:2004 and EN 60947-5-2:1998. The provisions
13、of the general rules, EN 60947-1, are applicable to this part of EN 60947, where specifically called for. General rules clauses and subclauses thus applicable, as well as tables, figures and annexes are identified by a reference to IEC 60947-1, for example 1.2.3 or Annex A of IEC 60947-1. The follow
14、ing dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2008-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-09-01 This European Standa
15、rd has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and covers essential requirements of EC Directive EMC (2004/108/EC). See Annex ZZ. Annexes ZA and ZZ have been added by CENELEC. _ Endorsement notice The text of the International
16、 Standard IEC 60947-5-9:2007 was approved by CENELEC as a European Standard without any modification. _ 3 EN 60947-5-9:2007 CONTENTS 1 General5 1.1 Scope and object.5 1.2 Normative references 5 2 Terms and definitions .6 2.1 Basic definitions 7 2.2 Characteristics of a flow rate switch .8 2.3 Delay
17、times .9 3 Classification9 3.1 General .9 3.2 Classification according to sensing means .10 3.3 Classification according to the construction form 10 3.4 Classification according to the switching element function 10 3.5 Classification according to the type of output10 3.6 Classification according to
18、the method of connection10 4 Characteristics .10 4.1 Summary of characteristics10 4.2 Operating conditions10 4.3 Rated and limiting values for the flow rate switch11 4.4 Utilization categories for the switching element 13 5 Product information 13 5.1 Nature of information .13 5.2 Marking .13 5.3 Ins
19、truction for installation, operation and maintenance .14 6 Normal service, mounting and transport conditions14 6.1 Normal service conditions14 6.2 Conditions during transport and storage.15 6.3 Mounting .15 6.4 Indicating means .15 7 Constructional and performance requirements.15 7.1 Constructional
20、requirements 15 7.2 Performance requirements.17 7.3 Shock and vibration .23 8 Tests23 8.1 Kinds of tests 24 8.2 Compliance with constructional requirements .24 8.3 Performance24 8.4 Verification of set point and delay times .31 8.5 Verification of the electromagnetic compatibility .32 8.6 Test resul
21、ts and test report 34 EN 60947-5-9:2007 4 Annex ZA (normative) Normative references to international publications with their corresponding European publications35 Annex ZZ (informative) Coverage of Essential Requirements of EC Directives .37 Figure 1 Relationship between operating points of a flow r
22、ate switch.11 Figure 2 Relationship between Ueand UB11 Figure 3 Test circuit for the verification of time delay before availability.27 Figure 4 Signal output across load in Figure 3 27 Figure 5 Test circuit for the verification of minimum operational current OFF-state current, voltage drop and indep
23、endent snap action28 Figure 6 Short-circuit testing 31 Figure 7 Testing set point and delay times32 Table 1 Classification of flow rate switches.9 Table 2 Acceptance criteria21 Table 3 Immunity tests.22 5 EN 60947-5-9:2007 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 5-9: Control circuit devices and
24、switching elements Flow rate switches 1 General 1.1 Scope and object This part of IEC 60947 applies to flow rate switches that sense the rate of flow of a gas, a liquid or a granular solid. These switches change their output state if a pre-set value for the speed of flow is exceeded. These flow rate
25、 switches are self-contained, have semiconductor switching element(s) and are intended to be connected to circuits, the rated voltage of which does not exceed 250 V 50 Hz/60 Hz a.c. or 300 V d.c. This standard does not specify the additional measures that are necessary for flow rate switches used in
26、 conjunction with explosive sensing materials and/or in an explosive location. This standard is not intended to cover devices with analogue outputs. The object of this standard is to state for flow rate switches: definitions; classifications; characteristics; product information; normal service, mou
27、nting and transport conditions; constructional and performance requirements; tests to verify rated characteristics. 1.2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated re
28、ferences, the latest edition of the referenced document (including any amendments) applies. IEC 60446:1999, Basic and safety principles for man-machine interface, marking and identification Identification of conductors by colours or numerals IEC 60947-1:2004, Low-voltage switchgear and controlgear P
29、art 1: General rules IEC 60947-5-2:1997, Low-voltage switchgear and controlgear Part 5-2: Control circuit devices and switching elements Proximity switches Amendment 1 (1999) Amendment 2 (2003) EN 60947-5-9:2007 6 IEC 61000-3-2:2005, Electromagnetic compatibility (EMC) Part 3-2: Limits Limits for ha
30、rmonic current emissions (equipment input current 16 A per phase) IEC 61000-3-3:1994, Electromagnetic compatibility (EMC) Part 3-3: Limits Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems for equipment with rated current 16 A per phase and not subj
31、ect to conditional connection Amendment 1 (2001) Amendment 2 (2005) IEC 61000-4-2:1995, Electromagnetic compatibility (EMC) Part 4-2: Testing and measurement techniques Electrostatic discharge immunity test Amendment 1 (1998) Amendment 2 (2000) IEC 61000-4-3:2006, Electromagnetic compatibility (EMC)
32、 Part 4-3: Testing and measurement techniques Radiated, radio-frequency, electromagnetic field immunity test IEC 61000-4-4:2004, Electromagnetic compatibility (EMC) Part 4-4: Testing and measurement techniques Electrical fast transient/burst immunity test IEC 61000-4-6:2003, Electromagnetic compatib
33、ility (EMC) Part 4-6: Testing and measurement techniques Immunity to conducted disturbances, induced by radio-frequency fields Amendment 1 (2004) Amendment 2 (2006) IEC 61000-4-8:1993, Electromagnetic compatibility (EMC) Part 4-8: Testing and measurement techniques Power frequency magnetic field imm
34、unity test Amendment 1 (2000) IEC 61000-4-11:2004, Electromagnetic compatibility (EMC) Part 4-11: Testing and measurement techniques Voltage dips, short interruptions and voltage variations immunity tests IEC 61000-4-13:2002, Electromagnetic compatibility (EMC) Part 4-13: Testing and measurement tec
35、hniques Harmonics and interharmonics including mains signalling at a.c. power port, low-frequency immunity tests IEC 61140:2001, Protection against electric shock Common aspects for installation and equipment Amendment 1 (2004) IEC 61558-2-6, Safety of power transformers, power supply units and simi
36、lar Part 2: Particular requirements for safety isolating transformers for general use CISPR 11:2003, Industrial, scientific and medical (ISM) radio-frequency equipment Electromagnetic disturbance characteristics Limits and methods of measurement Amendment 1 (2004) 2 Terms and definitions For the pur
37、poses of this document, the relevant definitions given in Clause 2 of IEC 60947-1 and Clause 2 of IEC 60947-5-2 apply with the following additional definitions. 7 EN 60947-5-9:2007 Alphabetical index of definitions Reference A Active zone. 2.2.1 Adjuster (for a flow rate switch). 2.2.4 F Flow direct
38、ion . 2.1.6 Flow rate sensor. 2.1.2 Flow rate switch 2.1.1 H Homogenization zone . 2.1.7 Hysteresis (H). 2.2.8 M Maximum temperature gradient . 2.2.9 Medium 2.1.4 R Reference medium 2.1.5 Repeat accuracy (R) . 2.2.7 S Semiconductor switching element . 2.1.3 Sensing range 2.2.6 Sensor tip. 2.2.2 Set
39、point (ss) 2.2.5 Submersion depth. 2.2.3 T Time delay before availability (tv) 2.3.3 Turn-off time. 2.3.2 Turn-on time. 2.3.1 2.1 Basic definitions 2.1.1 flow rate switch device consisting of a flow rate sensor and a switching element which, in accordance with an increasing or decreasing flow of a d
40、efined medium (flow medium), changes the output signal at a predetermined value EN 60947-5-9:2007 8 2.1.2 flow rate sensor transducer which detects the rate of flow of a medium in an active area 2.1.3 semiconductor switching element element designed to switch the current in an electric circuit by co
41、ntrolling conductivity of a semiconductor 2.1.4 medium gaseous, liquid, or fine granular solid, or a combination thereof 2.1.5 reference medium medium with which measurements according to this standard are made 2.1.6 flow direction direction from which the medium flows towards the sensor 2.1.7 homog
42、enization zone zone in front of and behind the sensor with undisturbed flow necessary to homogenize the flow of the medium in order to obtain correct measurement results 2.2 Characteristics of a flow rate switch 2.2.1 active zone zone in which a flow rate is detected NOTE This can be, for example th
43、e surface of the sensor tip or inner surface of a sensor tube. 2.2.2 sensor tip tip which is surrounded by the medium to sense the flow speed 2.2.3 submersion depth minimum length of the sensor tip that needs to be surrounded by the medium to obtain correct measurement results 2.2.4 adjuster (for a
44、flow rate switch) part of a flow rate switch used to set the operating parameters NOTE This may be a potentiometer, a push-button and/or a data interface. 2.2.5 set point ssrate of flow of the medium at which the switching element changes its state 2.2.6 sensing range range between a minimum and a m
45、aximum rate of flow within which the set point can be adjusted 9 EN 60947-5-9:2007 2.2.7 repeat accuracy R value of variation of the set point under specified conditions 2.2.8 hysteresis H difference between the set points at which the switching element turns on and turns off 2.2.9 maximum temperatu
46、re gradient maximum specified value of a temperature change of the medium at constant rate within a specified time that does not lead to a change of state of the switching element 2.3 Delay times 2.3.1 turn-on time time required for the semiconductor switching element to respond after the measured i
47、nput variable has exceeded the set point under specified conditions 2.3.2 turn-off time time required for the semiconductor switching element to respond after the measured input variable has fallen below the set point under specified conditions 2.3.3 time delay before availability tvtime between the
48、 switching on of the supply voltage and the instant at which the flow rate switch becomes ready to operate correctly 3 Classification 3.1 General Flow rate switches are classified according to various general characteristics as shown in Table 1. Table 1 Classification of flow rate switches 1stpositi
49、on/ 1 digit 2ndposition/ 1 digit 3rdposition/ 1 digit 4thposition/ 1 digit 5thposition/ 1 digit Sensing means Construction form Switching element function (output) Type of output Method of connection 3.2 3.3 3.4 3.5 3.6 F Flow 1 One sensor tip 2 Two sensor tips 3 Flush with tube A NO (make) B NC (break) C Changeover (make break) P Programmable by user S Other P PNP output, 3 or 4 terminal d.c. N NPN output, 3 or 4 terminal
