Safety of household and similar electrical appliances - Part 46: Particular requirements for milking machines
1 Scope
This clause of GB/T 4706.1-2024 is replaced by the following.
This International Standard deals with the safety of milking machines, to be used in stalls and in the open, that are designed 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 101: Examples of such machines are:
——bucket milking machines;
——direct-to-can milking machines;
——milking pipeline machines;
——recorder milking machines;
——independent air and milk transport milking machines.
Note 102: A detailed description of the types of milking machines covered by this standard is given in ISO 3918.
Note 103: The upper limit for the rated voltage of 250 V single-phase may be exceeded in cases where 480 V split-phase motors are required.
Note 104: This 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 105: Attention is drawn to the fact that:
——for milking machines intended to be used in vehicles or on board ships, additional requirements may be necessary;
——in many countries, additional requirements are specified by the national health authorities, the national authorities responsible for the protection of labour, the national water supply authorities and similar authorities.
2 Normative references
This clause of GB/T 4706.1-2024 is applicable.
ISO 7010:2011, Graphical symbols - Safety colours and safety signs - Registered safety
signs
3 Terms and definitions
This clause of GB/T 4706.1-2024 is applicable except as follows.
3.1.9 Replacement:
normal operation
——vacuum pumps and those of a pulsation system are operated at rated vacuum during continuous operation;
——releaser milk pumps are operated with the vacuum system being operated at rated vacuum of the vacuum pump;
——during milking the vacuum pump, the pulsation system and the releaser milk pump are operated continuously according to the manufacturer's instructions,
——during cleaning the vacuum pump, the pulsation system and the releaser milk pump and cleaning system are operated continuously according to the manufacturer's instructions
3.101
sub-assembly
part that in association with other parts, forms a complete milking machine
3.102
milking machine
complete machine installation for milking, usually comprising vacuum and pulsation systems, one or more clusters and other components
3.103
milking unit
assembly of milking machine components that is replicated in an installation so that more than one animal may be milked at one time
3.104
vacuum pump
air pump that produces a vacuum in the system
3.105
pulsation system
system in which cyclic pressure changes, initiated either pneumatically or electrically, are produced in the chambers of the milking units
3.106
releaser milk pump
device for pumping milk out of the vacuum system
3.107
rated vacuum
vacuum assigned to the vacuum pump or pulsation system by the manufacturer
4 General requirement
This clause of GB/T 4706.1-2024 is applicable.
