This standard applies to the safety of milking machines used for milking farm animals such as dairy cows in stables or open areas, with a single-phase operation rated voltage not exceeding 250V and other operation rated voltages not exceeding 480V. GB 4706.46-1999 Safety of household and similar electrical appliances Particular requirements for milking machines GB4706.46-1999 Standard download decompression password: www.bzxz.net

GB4706.46-1999
This standard is equivalent to IEC335-2-70:1993 "Safety of household and similar electrical appliances Part 2: Particular requirements for milking machines". This standard should be used in conjunction with GB4706.1--1998 "General safety requirements for household and similar electrical appliances". The part of this standard that says "apply" indicates that the corresponding provisions in GB4706.1-1998 are applicable to this standard; the part of this standard that says "replace" or "modify" shall be subject to this standard; the part of this standard that says "add" indicates that in addition to complying with the corresponding provisions in GB4706.1-1998, it shall also comply with the provisions added by this standard. This standard is proposed and managed by the National Technical Committee for Standardization of Household Electrical Appliances. The main drafting unit of this standard is Guangzhou Electric Science Research Institute. The main drafter of this standard is Chen Shuqin.
This standard is entrusted to the National Technical Committee for Standardization of Household Electrical Appliances for interpretation.779
GB 4706. 46—1999
IEC Preface
1) IEC (International Electrotechnical Commission) is an international organization for standardization composed of all national electrotechnical committees (IEC National Committees). Its purpose is to promote international cooperation on standardization issues in the electrical and electronic fields. To this end, IEC, in addition to other activities, also publishes international standards. The preparation of these standards is entrusted to technical committees. Any IEC National Committee interested in the technical issue may participate in the preparation work. International, governmental and non-governmental organizations in contact with IEC may participate in this work. IEC and the International Organization for Standardization (ISO) work closely on the basis of an agreement between the two organizations. 2) Formal resolutions or agreements of IEC on technical issues, formulated by technical committees in which all national committees with a particular interest in the issue participate, represent, as far as possible, the international consensus on the issues involved. 3) These formal resolutions or agreements, published in the form of standards, technical reports or guidelines, are accepted by the National Committees in this sense.
4) In order to achieve international consensus, IEC National Committees agree to use IEC standards to the greatest extent possible in their national and regional standards. International standards. Differences between IEC standards and corresponding national or regional standards should be clearly marked in the latter. 5) IEC has not established a procedure for the recognition mark. IEC is not responsible for any claim that a device complies with an IEC standard.
This standard was developed by Subcommittee 61H (Safety of Farm Electric Appliances) of IEC Technical Committee 61 (Safety of Household and Similar Electrical Appliances).
This standard constitutes the first edition of IEC335-2-70. The content of this standard is based on the following documents . DIS
61H(CO)30
For all the information on the voting of this standard, please refer to the voting report listed in the table above. Voting report
61H(CO)36
This standard is used in conjunction with the latest version of IEC335-1 and its revised version. It is established on the basis of IEC335-1 3rd edition (1991).
This standard supplements or modifies the corresponding clauses in IEC335-1 to transform it into the IEC standard: Safety requirements for milking machines. Any clause in IEC335-1 that is not specifically mentioned in this standard shall still be applicable. When "addition", "modification" or "replacement" is written in this standard, the relevant contents in IEC335-1 shall be modified accordingly. Notes
1 The following printing fonts shall be used:
Requirements: Roman font;
-Test instructions: Italic font;
-Instructions: Small Roman font.
2 The chapters and figures added on the basis of IEC335-1 are numbered from 101. 3 The appendices added on the basis of IEC335-1 are marked with letters AA, BB, etc. The following differences exist in some countries:
25.7 Ordinary PVC encapsulated power cords are allowed (Australia). 780
National Standard of the People's Republic of China
Safety of household and similar electrical appliances
Particular requirements for milking machines
This chapter in GB4706.1-1998 is applicable except for the following contents. 1.1 Replaces:
GB 4706. 46—1999
idt IEC 335-2-70:1993
This standard applies to the safety of milking machines used for milking farm animals such as dairy cows in livestock or open-air places, with a single-phase operation rated voltage not exceeding 250V and other operation rated voltages not exceeding 480V. Notes
1 Such milking machines include the following:
bucket milking machine;
direct-feeding milk bucket milking machine;
milking and milking machine;
milking machine with storage tank;
independent air-feeding milk-feeding milking machine.
2 The various types of milking machines described in this standard are in accordance with ISO 3918 and a diagram is given in Appendix AA. 3 Where a 480V split-phase motor is required, the single-phase rated operating voltage may exceed the upper limit of 250V. This standard applies to the case where the components of a milking machine are provided by the same manufacturer and assembled into a complete milking machine. It can also be used as a safety guide for milking machines assembled from components of milking machines provided by different manufacturers. 5 Note the following:
Additional requirements are required for milking machines intended for use in vehicles or ships; - Special requirements are required for milking machines intended for use in tropical countries; - In many countries, additional requirements are specified by national health agencies, national labor protection agencies, national water supply agencies and similar agencies. 2 Definitions
This chapter in GB4706.1-1998 is applicable except for the following. 2.2.9 Replaces:
Normal operation of a vacuum pump and of a pulsation system Continuous operation at rated vacuum.
Normal operation of a releaser milk pumpNormal operation of a releaser milk pumpThe work performed when the vacuum system is working at the rated vacuum degree of the vacuum pump. Normal operation of a cleaning systemThe cleaning system works in accordance with the manufacturer's instructions. Normal operation during milkingNormal operation during milkingIn continuous operation, the vacuum pump, pulsation system and milk release pump all work in accordance with the manufacturer's instructions. Approved by the State Administration of Quality and Technical Supervision on November 11, 1999 and implemented on May 1, 2000
GB 4706. 46 -- 1999
Normal operation during cleaningIn continuous operation, the vacuum pump, pulsation system, milk release pump and cleaning system all work in accordance with the manufacturer's instructions. 2.2.101 Sub-assembly
Parts assembled with other parts to form a complete milking machine. 2.2.102 Milking machineA complete mechanical device for milking, usually consisting of a vacuum system, a pulsation system, one or more subassemblies and other components. 2.2.103 Milking unit
Assembly of components of a milking machine. Multiple milking units can be repeatedly arranged in a milking device, so that multiple animals can be milked at the same time. 2.2.104 Vacuum pump
An air pump that creates a vacuum in the system.
2.2.105 Pulsation system A system that uses pneumatic or electric power to create periodic pressure changes in the container of the milking unit. 2.2.106 Releaser milk pump A device that draws milk out of the vacuum system. 2.2.107 Rated vacuum ratedvacuum The vacuum degree of the vacuum pump and pulsation system set by the manufacturer. 3 General requirements
This chapter in GB4706.1-1998 is applicable. 4 General conditions for testing
This chapter in GB4706.1-1998 is applicable except for the following contents. 4.2 Addition:
The manufacturer shall provide appropriate test accessories and installation instructions for testing the milking machine or its components. 4.101 The tests specified in this standard for the milking machine to operate under normal working conditions shall be carried out under each normal working condition of the given milking and cleaning work.
5 Blank chapter
6 Classification
This chapter in GB4706.1-1998 is applicable except for the following contents. 6.1 Replacement:
The protection against electric shock of the milking machine or component shall be Class, Class II or Class II. The rated voltage of the Class I milking machine or component shall not exceed 24V. Compliance shall be determined by inspection and testing. 6.2 Replacement:
Parts of milking machines or components with electrical components and which can be washed with water according to the instructions shall be of at least IPX6 structure. Other electrical parts shall be of at least IPX4 structure.
Compliance shall be determined by inspection and testing. 7 Marking and instructions
This chapter in GB4706.1-1998 is applicable except for the following. 7.1 Added:
GB4706.46-1999
Milking machines or components that are not marked with IPX6 and are installed in areas where they may be cleaned with water jets in accordance with the manufacturer's instructions shall be marked with the following: Do not connect hoses
The vacuum degree of the vacuum pump and pulsation system shall be indicated in kPa. 7.12.1 Added:
The milking machine manufacturer shall provide complete instructions as follows: Wiring diagram;
The installation shall be carried out in conjunction with an effective equipotential bonding system; Parts not marked with IPX6 shall be installed in places where they will not be cleaned with high-pressure water jets; ...Details on how to clean the milking machine components after installation; - Installation shall be carried out in accordance with the relevant parts of the wiring regulations. Note: For details, see IFC364-7-705.
The milking machine shall be provided with an instruction manual, which shall include all the details required for the maintenance and operation of the milking machine and the replacement of parts, and shall in particular include:
the frequency of maintenance work and the relevant details of all parts that need to be replaced or adjusted; - all parts necessary for installation, including the specification code of the component when applicable. The component manufacturer shall provide appropriate installation instructions and user instructions for the maintenance of the component. 7.15 Added:
Each independent component shall be marked with relevant markings. 8 Protection against contact with live parts
This chapter in GB4706.1-1998 is applicable. 9 Starting of electric appliances
This chapter in GB4706.1-1998 is not applicable. 10 Input power and current
This chapter in GB4706.1-1998 is applicable. 11 Heating
This chapter in GB4706.1-1998 is applicable except for the following contents. 11.7 The cleaning operation cycle refers to the maximum cleaning time according to the manufacturer's instructions. 12 Blank chapter
13 Leakage current and electrical strength at working temperature GB4706.1-1998 This chapter is applicable. 14 Blank chapter
15 Moisture resistance
GB4706.1-1998 This chapter is applicable. 783
16 Leakage current and electrical strength
GB4706.1-1998 This chapter is applicable. 17 Overload protection of transformers and related circuits GB4706.1--1998 This chapter is applicable. 18 Durability
GB 4706.46--1999
GB4706.1-1998 This chapter is not applicable. 19 Abnormal operation
This clause in GB 4706.1-1998 applies except for the following. 19.1 Addition:
Compliance is determined by any type of operation or any fault that may occur in normal use when the milking machine is in normal operation or at rated voltage. The test is performed continuously, simulating only one fault condition at a time. During the test, the temperature of the winding shall not exceed the value given in Table 6.
1 Examples of fault conditions:
The program controller stops at a certain position;
During the execution of a part of the program, one or more phases of the power supply are disconnected and then reconnected; an electrical component (such as a resistor, capacitor, inductor, etc.) is open or short-circuited; a magnetic valve fails;
-Water supply disconnected;
-Washing water supply disconnected
2 In general, the test is limited to the situation that is likely to produce the most unfavorable results. For the purpose of these tests, the thermal controller cannot be short-circuited. 3
19.2 Not applicable.
19.3 Not applicable.
19.7 Added:
If stable conditions are required, the moving parts of the vacuum pump must be locked. Stability and mechanical hazards
This chapter in GB4706.1-1998 is applicable. 21 Mechanical strength
This chapter in GB4706.1-1998 is applicable except for the following contents. 21.1 Modified:
The impact hammer is adjusted to an impact energy of 1J0.1J. 22 Structure
This chapter in GB4706.1-1998 is applicable except for the following contents. 22.1 Added:
The housing of the motor to be installed in the non-milking area (in a dusty environment) shall be at least IPX4 structure. The housing of other electrical components to be installed in similar places shall be at least IPX5 structure. 784
22.33 Added:
GB 4706. 46-1999
Note: Liquids in milking machines should be treated as accessible conductive liquids. 23 Internal wiring
This chapter in GB4706.1-1998 is applicable. 24 Components
This chapter in GB 4706.1-1998 is applicable. 25 Power supply connection and external flexible cord
This chapter in GB4706.1-1998 is applicable except for the following. 25.7 Replaced:
The power supply flexible cord shall not be lighter than ordinary polychloroprene armored flexible cord (standard number 245IEC57). Compliance shall be determined by inspection.
26 Terminals for external conductors
This chapter in GB4706.1-1998 is applicable. 27 Grounding measures
This chapter in GB4706.1-1998 is applicable except for the following contents. 27.2 Added:
Milking machines and their components should be equipped with terminals for external equipotential conductors. The terminals should be in effective contact with all fixed exposed metal parts of the milking machine or components, and should allow connection with wires with a cross-sectional area of ​​10mm2. The location of the terminals should facilitate the connection of wires after the milking machine or other components are installed.
Note: Small fixed exposed metal parts, such as nameplates, are not required to be in electrical contact with the terminals. 28 Screws and connections
This chapter in GB4706.1-1998 is applicable. 29 Creepage distance, electrical tunnel and through insulation distance This chapter in GB4706.1-1998 is applicable. 30 Resistance to heat, flame and tracking
This chapter in GB 4706.1-1998 is applicable except for the following contents. 30.2 Modification:
The test description is replaced by the following contents:
Compliance is determined by the tests of 30.2.1, 30.2.3 and, if applicable, the test of 30.2.4. 31 Rust prevention
This chapter in GB4706.1-1998 is applicable. 32 Radiation, toxicity and similar hazards
This chapter in GB4706.1-1998 is applicable. 785
GB 4706. 46 -- 1999
The appendix in GB4706.1-1998 is applicable except for the following contents. Appendix Awww.bzxz.net
(Standard Appendix)
Cited Standards
Added:
IEC 364-7-705:1984
Electrical installation of buildings
Electrical installation of buildings Part 7: Requirements for special installations or locations Section 705: Agricultural and horticultural
Appendix AA
(Indicative annex)
Example of a milking machine
Extracted from ISO 3918:1977 Example of a milking machine - Terminology
Regulator
Intermediate collector (vacuum tank)
Vacuum pump
Vacuum gauge
Pulsator
Figure AA1
Regulator
Intermediate collector (vacuum tank)
Vacuum pump
Vacuum gauge
Vacuum switch
Gas supply pipe
Vacuum pipe
Long pulsating pipe
Long milk pipe| |tt||Bucket milking machine
Vacuum switch
Vacuum tube
Pulsator
Milk bucket
Long pulsation tube
Long milk pipe
Figure AA2 Direct-into-milk bucket milking machine
Milk container
Connector
Air supply pipeline
Milk container
Connector||tt| |Vacuum pump
Regulator
Intermediate collector
(vacuum tank）
Cleaning net
Milk delivery pipeline
GB4706.46—1999
Air supply pipeline (pulsator)
Receiver
Milk discharge pump
Note: A milk collector equipped with a discharge device can be used instead of the receiver and the milk discharge pump. Figure AA3 Milking and milking machine
Air supply pipeline (pulsator)
Regulator
Intermediate collector
(vacuum tank)
Vacuum pump
Cleaning net
Milk delivery pipeline
Vacuum gauge
Milking pipeline
Vacuum gauge
Air supply pipeline (vacuum milking)
Transmission pipeline
Receiver
Milk discharge pump
Note: A milk collector equipped with a release device can be used instead of the receiver and the milk discharge pump. Cun Yan
Long milk pipe
Figure AA4 Milking machine with storage cylinder
Medium pulsator
Long pulsation pipe
Milting container
Connector
Medium pulsator
Long pulsation pipe
Milting container
Connector
GB4706.46-1999
Vacuum gauge
Air supply pipeline (pulsator)
Air supply pipeline (vacuum milking)
Milk pipeline (high vacuum)
Pulsator
Long pulsation pipe
Long milk pipe
Milting container
Connector
Note: A milk collector with a discharge device can be used instead of the receiver and the milk pump. Figure AA5
Independent air and milk delivery milking machine
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