1、Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:46, Uncontrolled Copy, (c) BSIg49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58s
2、witching elements Flow rate switchesICS 29.130.20Low-voltage switchgear and controlgear Part 5-9: Control circuit devices and BRITISH STANDARDBS EN 60947-5-9:2007BS EN 60947-5-9:2007Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:46, Uncontrolled Copy, (c) BSIThis British Standa
3、rd was published under the authority of the Standards Policy and Strategy Committee on 31 January 2008 BSI 2008ISBN 978 0 580 61338 8Amendments/corrigenda issued since publicationDate CommentsThis publication does not purport to include all the necessary provisions of a contract. Users are responsib
4、le for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. National forewordThis British Standard is the UK implementation of EN 60947-5-9:2007. It is identical to IEC 60947-5-9:2006.The UK participation in its preparation was entrusted by Techni
5、cal 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 this committee can be obtained on request to its secretary.EUROPEAN STANDARD EN 60947-5-9 NORME EUROPENNE EUROPISCHE NORM No
6、vember 2007 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 2007 CENELEC - All rights of exploitation in any form and by any mea
7、ns 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 elements - Flow rate switches (IEC 60947-5-9:2006) Appareillage basse tension - Partie 5-9: Appareils et lmen
8、ts de commutation pour circuit de commande - Dtecteurs de dbit (CEI 60947-5-9:2006) Niederspannungsschaltgerte - Teil 5-9: Steuergerte und Schaltelemente - Durchflussmengenschalter (IEC 60947-5-9:2006) This European Standard was approved by CENELEC on 2007-09-01. CENELEC members are bound to comply
9、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 such national standards may be obtained on application to the Central Secret
10、ariat 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 own language and notified to the Central Secretariat has the same status as th
11、e official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Po
12、rtugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:46, Uncontrolled Copy, (c) BSIEN 60947-5-9:2007 2 Foreword The text of document 17B/1500/FDIS, future edition 1 of IEC 60947-5-9, prepared by S
13、C 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 of
14、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 following
15、 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 Standard
16、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 St
17、andard IEC 60947-5-9:2007 was approved by CENELEC as a European Standard without any modification. _ Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:46, Uncontrolled Copy, (c) BSI 3 EN 60947-5-9:2007 CONTENTS 1 General5 1.1 Scope and object.5 1.2 Normative references 5 2 Terms a
18、nd definitions .6 2.1 Basic definitions 7 2.2 Characteristics of a flow rate switch .8 2.3 Delay 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
19、function 10 3.5 Classification according to the type of output10 3.6 Classification according to 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 sw
20、itching element 13 5 Product information 13 5.1 Nature of information .13 5.2 Marking .13 5.3 Instruction 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
21、.15 6.4 Indicating means .15 7 Constructional and performance requirements.15 7.1 Constructional 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 p
22、oint and delay times .31 8.5 Verification of the electromagnetic compatibility .32 8.6 Test results and test report 34 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:46, Uncontrolled Copy, (c) BSIEN 60947-5-9:2007 4 Annex ZA (normative) Normative references to international pub
23、lications 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 rate switch.11 Figure 2 Relationship between Ueand UB11 Figure 3 Test circuit for the verification of tim
24、e 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 independent snap action28 Figure 6 Short-circuit testing 31 Figure 7 Testing set point and delay times32 Tabl
25、e 1 Classification of flow rate switches.9 Table 2 Acceptance criteria21 Table 3 Immunity tests.22 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:46, Uncontrolled Copy, (c) BSI 5 EN 60947-5-9:2007 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 5-9: Control circuit devices and swit
26、ching 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 swi
27、tches 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 con
28、junction 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, mountin
29、g 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 refere
30、nces, 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 Part
31、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) Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:46, Uncontrolled Copy, (c) BSIEN 60947-5-
32、9:2007 6 IEC 61000-3-2:2005, Electromagnetic compatibility (EMC) Part 3-2: Limits Limits for harmonic 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
33、 public low-voltage supply systems for equipment with rated current 16 A per phase and not subject 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 tes
34、t Amendment 1 (1998) Amendment 2 (2000) IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) 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 techni
35、ques Electrical fast transient/burst immunity test IEC 61000-4-6:2003, Electromagnetic compatibility (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 comp
36、atibility (EMC) Part 4-8: Testing and measurement techniques Power frequency magnetic field immunity 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
37、IEC 61000-4-13:2002, Electromagnetic compatibility (EMC) Part 4-13: Testing and measurement techniques 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 equipm
38、ent Amendment 1 (2004) IEC 61558-2-6, Safety of power transformers, power supply units and similar Part 2: Particular requirements for safety isolating transformers for general use CISPR 11:2003, Industrial, scientific and medical (ISM) radio-frequency equipment Electromagnetic disturbance character
39、istics Limits and methods of measurement Amendment 1 (2004) 2 Terms and definitions For the purposes 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. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA
40、STANDARDS, 29/04/2008 03:46, Uncontrolled Copy, (c) BSI 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 direction . 2.1.6 Flow rate sensor. 2.1.2 Flow rate switch 2.1.1 H Homogenization zone . 2.1.7 Hysteresis (H).
41、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 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
42、 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 defined medium (flow medium), changes the output signal at a predetermined value Licensed Copy: Wang Bin,
43、ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:46, Uncontrolled Copy, (c) BSIEN 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 controll
44、ing 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 homogenizat
45、ion 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 the surf
46、ace 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 flow r
47、ate 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 maximum
48、 rate of flow within which the set point can be adjusted Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 29/04/2008 03:46, Uncontrolled Copy, (c) BSI 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 betwee
49、n the set points at which the switching element turns on and turns off 2.2.9 maximum temperature 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 input variable has exceeded the set point
