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1、BRITISH STANDARD BS EN 60335-2-70: 1996 IEC 335-2-70: 1993 Specification for Safety of household and similar electrical appliances Part 2: Particular requirements Section 2.70 Particular requirements for milking machines The European Standard EN 60335-2-70:1996 has the status of a British Standard I
2、CS 65.040.10 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:01:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60335-2-70:1996 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board
3、 and comes into effect on 15 July 1996 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference CPL/61 Draft for comment 90/34582 DC ISBN 0 580 26005 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted to
4、Technical Committee CPL/61, upon which the following bodies were represented: Agricultural Engineers Association Association of Consulting Scientists Association of Control Manufacturers TACMA (BEAMA Ltd.) Association of Manufacturers of Domestic Electrical Appliances British Cable Makers Confederat
5、ion British Electrotechnical Approvals Board British Pest Control Association British Retail Consortium Cesa (the Association of Catering Equipment Manufacturers and Importers) Consumer Policy Committee of BSI Consumers Association Department of Trade and Industry (Consumer Safety Unit, CA Division)
6、 ERA Technology Ltd. Electrical Installation Equipment Manufacturers Association (BEAMA Ltd.) Electricity Association Health and Safety Executive Industrial Cleaning Machine Manufacturers Association (BEAMA Ltd.) Institute of Trading Standards Administration Institution of Electrical Engineers Loss
7、Prevention Council Ministry of Defence Portable Electric Tool Manufacturers Association Rotating Electrical Machines Association (BEAMA Ltd.) Royal Society for the Prevention of Accidents Small Electrical Appliances Marketing Association The following bodies were also represented in the drafting of
8、the standard, through subcommittees and panels: British Agricultural test specifications: in italic type; notes: in small roman type. Words in bold in the text are defined in clause 2. When a definition of Part 1 concerns an adjective, the adjective and the associated noun are also in bold. latest d
9、ate by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1996-06-01 date on which national standards conflicting with the EN have to be withdrawn(dow) 1998-06-01 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:01:16
10、 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-70:1996 BSI 11-19993 Contents Page Foreword2 1Scope5 2Definitions5 3General requirement5 4General conditions for the tests5 5Void5 6Classification5 7Marking and instructions6 8Protection against access to live parts6 9Starting of motor-operated
11、appliances6 10Power input and current6 11Heating6 12Void6 13Leakage current and electric strength at operating temperature6 14Void6 15Moisture resistance6 16Leakage current and electric strength6 17Overload protection of transformers and associated circuits6 18Endurance7 19Abnormal operation7 20Stab
12、ility and mechanical hazards7 21Mechanical strength7 22Construction7 23Internal wiring7 24Components7 25Supply connection and external flexible cords7 26Terminals for external conductors7 27Provisions for earthing7 28Screws and connections7 29Creepage distances, clearances and distances through insu
13、lation8 30Resistance to heat, fire and tracking8 31Resistance to rusting8 32Radiation, toxicity and similar hazards8 Annex A (normative) Normative references International publications with their relevant European publications9 Annex AA (informative) Examples of milking machines9 Figure 1 Bucket mil
14、king machine9 Figure 2 Direct-to-can milking machine10 Figure 3 Milking pipeline machine10 Page Figure 4 Recorder milking machine11 Figure 5 Independent air and milk transport milking machine11 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:01:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
15、 4 blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:01:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-70:1996 BSI 11-19995 1 Scope This clause of part 1 is replaced by: This standard deals with the safety of milking machines to be used in stalls and in the open, which are de
16、signed for milking farm animals, such as cows, the rated voltage of the milking machine being not more than 250 V for single-phase operation and 480 V for other operations. NOTE 1Examples of such machines are: bucket milking machines; direct-to-can milking machines; milking pipeline machines; record
17、er milking machines; indpendent air and milk transport milking machines. NOTE 2A detailed description of the types of milking machines covered by this standard is given in ISO 3918 and is indicated in Annex AA. NOTE 3The upper limit for the rated voltage of 250 V single-phase may be exceeded in case
18、s where 480 V split-phase motors are required. NOTE 4This standard applies to milking sub-assemblies supplied by one manufacturer to form a complete milking machine. It can be used as guidance for the safety of milking machines formed from sub-assemblies supplied by different manufacturers. NOTE 5At
19、tention is drawn to the fact that: for milking machines intended to be used in vehicles or on board ships, additional requirements may be necessary; for milking machines intended to be used in tropical countries, special requirements may be necessary; in many countries, additional requirements are s
20、pecified by the national health authorities, the national authorities responsible for the protection of labour, the national water supply authorities and similar authorities. 2 Definitions This clause of part 1 is applicable except as follows: 2.2.9 Replacement: normal operation of a vacuum pump and
21、 of a pulsation system: Operation at rated vacuum during continuous operation. normal operation of a releaser milk pump: Operation when the vacuum system is being operated at rated vacuum of the vacuum pump. normal operation of a cleaning system: Operation of the cleaning system according to the man
22、ufacturers instructions. normal operation during milking: Operation of the vacuum pump, the pulsation system and the releaser milk pump during continuous operation according to the manufacturers instructions. normal operation during cleaning: Operation of the vacuum pump, the pulsation system and th
23、e releaser milk pump and cleaning system during continuous operation according to the manufacturers instructions. 2.2.101 sub-assembly part which, in association with other parts, forms a complete milking machine 2.2.102 milking machine complete machine installation for milking, usually comprising v
24、acuum and pulsation systems, one or more clusters and other components 2.2.103 milking unit assembly of milking machine components which is replicated in an installation so that more than one animal may be milked at one time 2.2.104 vacuum pump air pump which produces a vacuum in the system 2.2.105
25、pulsation system system in which cyclic pressure changes, initiated either pneumatically or electrically, are produced in the chambers of the milking units 2.2.106 releaser milk pump device for pumping milk out of the vacuum system 2.2.107 rated vacuum vacuum assigned to the vacuum pump or pulsation
26、 system by the manufacturer 3 General requirement This clause of part 1 is applicable. 4 General conditions for the tests This clause of part 1 is applicable except as follows: 4.2 Addition: The manufacturer shall provide a suitable test-assembly and installation instructions to enable the milking m
27、achine or its sub-assemblies to be tested. 4.101 Where tests are specified in this standard which require the milking machine to be operated under normal operation, the tests are to be carried out for each of the normal operation conditions given for milking and cleaning operations. 5 Void 6 Classif
28、ication This clause of part 1 is applicable except as follows: Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:01:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-70:1996 6 BSI 11-1999 6.1 Replacement Milking machines or sub-assemblies shall be of class I, class II or class III wit
29、h respect to protection against electric shock. Class III milking machines or sub-assemblies shall have a rated voltage not exceeding 24 V. Compliance is checked by inspection and by the relevant tests. 6.2 Replacement: Parts of a milking machine or sub-assembly which contain electrical components a
30、nd which may be cleaned with a water jet according to the instruction sheet, shall be at least of class IPX6 construction. Other electrical parts shall be at least of class IPX4 construction. Compliance is checked by inspection and by the relevant tests. 7 Marking and instructions This clause of par
31、t 1 is applicable except as follows: 7.1 Addition: Milking machines or sub-assemblies which are not marked IPX6 and which are installed according to the manufacturers instructions, in areas where water jet cleaning is likely, shall be marked with the following: DO NOT HOSE Vacuum pumps and pulsation
32、 systems shall be marked with the rated vacuum in kPa. 7.12.1 Addition: The manufacturer of the milking machine shall provide comprehensive instructions which shall include the following: a wiring diagram; that the installation shall be integrate into an effective equipotential bonding system; that
33、parts which are not marked IPX6 shall be installed in a location where they are not likely to be cleaned with the aid of a high pressure water jet; details on how to clean the milking machine assembly on completion of installation; that the installation is to be installed according to the relevant s
34、ection of the wiring rules. NOTEAttention is drawn to IEC 364-7-705. The milking machine shall be furnished with an instruction sheet which contains all details necessary for maintaining and operating the machine and for replacing spare parts. In particular, details shall be given of the: frequency
35、of maintenance procedures and details of all parts requiring replacement or adjustment; reference numbers of all parts and, where applicable, sub-assemblies used in the installation. The manufacturers of sub-assemblies shall provide appropriate instructions for installation and user maintenance of t
36、heir sub-assemblies. 7.15 Addition: Each separate sub-assembly shall be marked with the relevant markings. 8 Protection against access to live parts This clause of part 1 is applicable. 9 Starting of motor-operated appliances This clause of part 1 is not applicable. 10 Power input and current This c
37、lause of part 1 is applicable. 11 Heating This clause of part 1 is applicable except as follows: 11.7 Addition: The operating period for cleaning denotes the maximum cleaning time according to the manufacturers instructions. 12 Void 13 Leakage current and electric strength at operating temperature T
38、his clause of part 1 is applicable. 14 Void 15 Moisture resistance This clause of part 1 is applicable. 16 Leakage current and electric strength This clause of part 1 is applicable. 17 Overload protection of transformers and associated circuits This clause of part 1 is applicable. Licensed Copy: she
39、ffieldun sheffieldun, na, Mon Nov 13 14:01:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-70:1996 BSI 11-19997 18 Endurance This clause of part 1 is not applicable. 19 Abnormal operation This clause of part 1 is applicable except as follows: 19.1 Addition: Compliance is also checked by app
40、lying any type of operation, or any defect which may be expected in normal use, while the milking machine is operated under normal operation and at rated voltage. Only one fault condition is reproduced at a time, the tests being made consecutively. During the tests, the temperature of windings shall
41、 not exceed the values shown in Table 6. NOTE 1Examples of fault conditions are: a programme controller stopping in any position; disconnection and reconnection of one or more phases of the supply during any part of the programme; open-circuiting or short-circuiting of electrical components such as
42、resistors, capacitors, inductors and the like; failure of magnetic valves; disconnection of the water supply; disconnection of the cleaning-water supply. NOTE 2In general, tests are limited to those cases which may be expected to give the most unfavourable results. NOTE 3For the purpose of these tes
43、ts, thermal controls are not short-circuited. 19.2 Not applicable. 19.3 Not applicable. 19.7 Addition: Moving parts of vacuum pumps are locked as long as is necessary to obtain steady conditions. 20 Stability and mechanical hazards This clause of part 1 is applicable. 21 Mechanical strength This cla
44、use of part 1 is applicable except as follows: 21.1 Modification: The impact hammer is adjusted to provide an impact energy of 1 0,1 J. 22 Construction This clause of part 1 is applicable except as follows: 22.1 Addition: Enclosures of motors which are intended for installation in non-milking areas
45、where a dusty environment exists shall be at least of IP4X construction. Enclosures of other electrical parts intended to be installed in such areas shall be at least of IP5X construction. 22.33 Addition: NOTELiquids in milking machines are regarded as accessible conducting liquids. 23 Internal wiri
46、ng This clause of part 1 is applicable. 24 Components This clause of part 1 is applicable 25 Supply connection and external flexible cords This clause of part 1 is applicable except as follows: 25.7 Replacement: Supply cords shall not be lighter than ordinary polychloroprene sheathed cord (code desi
47、gnation 245 IEC 57). Compliance is checked by inspection. 26 Terminals for external conductors This clause of part 1 is applicable. 27 Provision for earthing This clause of part 1 is applicable except as follows. 27.2 Addition: Milking machines and their sub-assemblies shall be provided with a termi
48、nal for the connection of an external equipotential bonding conductor. This terminal shall be in effective contact with all fixed exposed metal parts of the milking machine or sub-assembly, and shall allow the connection of a conductor having a cross-sectional area of up to 10 mm2. It shall be locat
49、ed in a position convenient for the connection of the bonding conductor after installation of the milking machine or its sub-assemblies. NOTESmall fixed exposed metal parts, for example name plates and the like, are not required to be in electrical contact with the terminal. 28 Screws and connections This clause of part 1 is applicable. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 14:01:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-70:1996 8 BSI 11-1999 29 Creepage distances, clearances