IEC 60204-31 pdf download – Safety of machinery – Electrical equipment of machines – Part 31: Particular safety and EMC requirements for sewing machines, units and systems

IEC 60204-31 pdf download – Safety of machinery – Electrical equipment of machines – Part 31: Particular safety and EMC requirements for sewing machines, units and systems
This clause of part 1 is replaced by:
This part of lEC 60204 applies to the application of electrical and electronic equipment tosewing machines, units and systems,designed specifically for professional use in the sewingindustry.
NOTE See lEC 60335-2-28 for requirements for sewing machines for household and similar use.
The equipment covered by this part commences at the point of connection of the supply to theelectrical equipment of the machine (see 5.1). This part is applicable to the electricalequipment or parts of the electrical equipment which operate with nominal supply voltages notexceeding 1 0o0 v for alternating current and not exceeding 1 500 v for direct current,andwith nominal frequencies not exceeding 200 Hz.
lt does not cover all the requirements (e.g. guarding,interlocking, control) that are necessaryto safeguard persons from hazards other than electrical hazards and which are specified inother standards.
This part applies to sewing units and systems which are installed in dry and well-kept cleanlocations and which process dry sewing material, as in the clothing industry. Where sewingunits and systems are used in other than dry and well-kept clean locations，more stringentmeasures may be necessary, which need to be agreed.
2Normative references
This clause of part 1 is applicable except as follows:Additional references:
IEC 60664-1:1992，Insulation coordination for equipment with low voltage systems – Part 1:Principles,requirements and tests
IEC 60721-3-3:1994，Classification of environmental conditions – Part 3: Classification ofgroups of environmental parameters and their severities – Section 3: Stationary use atweather-protected locations
IEC 61000-4-2:1995,Electromagnetic compatibility(EMC) – Part 4:Testing and measurementtechniques – Section 2: Electrostatic discharge immunity test.Basic EMC publication
IEC 61000-4-3:1995,Electromagnetic compatibility (EMC) – Part 4:Testing and measurementtechniques – Section 3: Radiated, radio-frequency, electromagnetic field immunity test
IEC 61058-1:1990,Switches for appliances – Part 1: General requirements
CISPR 11:1999 Ed.3.1，Industrial, scientific and medical (ISM) radio-frequency equipment -Electromagnetic disturbance characteristics -Limits and methods of measurement
IsO 4915:1991，Textiles – Stitch types – Classification and terminology
Iso 4916:1991，Textiles – Seam types – Classification and terminology
ENV 50204:1995,Radiated electromagnetic field from digital radio telephones – lmmunity test
3Definitions
This clause of part 1 is applicable except as follows:Additional definitions:
3.101
sewing machine
machine designed to produce one or more stitch types (see IS0 4915) with one or moresewing threads. In producing a seam (see lS0 4916) the machine can perform one or moresewing functions.
NOTE Previously, the term “sewing machine head” was used instead of *sewing machine”.
3.102
sewing machine stand
item, for example designed as a table,on which the sewing machine is arranged to enableoptimum operation.
3.103
sewing machine drive
equipment that drives a sewing machine, such as an electric motor, which is speed-controlledby electrical and/or mechanical means with or without a positioning device and with or withoutcontrol of machine functions.
3.104
sewing unit
equipment consisting of at least a sewing machine， a sewing machine stand and a sewingmachine drive.One or several devices incorporated in and/or attached to the sewing machineor sewing unit, for example for sewing, cutting, feeding,etc. the sewing material, as well asthe sewing machine itself, are controlled by the operator or automatically.
3.105
sewing system
equipment consisting of at least two sewing units or parts of them，which are functionallyinterlinked.
4 General requirements
This clause of part 1 is applicable except as follows:
4.4.1 Electromagnetic compatibility
Modification:
See annex AA.4.4.3 HumidityModification:
Instead of the first paragraph, the following applies:
The electrical equipment shall be capable of operating in the intended manner in the humidityconditions covered by class 3K3 as specified in lEC 60721-3-3.
5 Incoming supply conductor terminations and devices for disconnecting
and switching off
This clause of part 1 is applicable except as follows:5.1 Incoming supply conductor terminationsModification:
Add after the first sentence of the first paragraph:
Each sewing unit shall have only one incoming supply connection.
Each sewing system consisting of at least two sewing units may have its own incoming supplyconnection for each sewing unit; however, if a failure of one sewing unit can cause a hazard,the sewing system shall have only one incoming supply connection.
Replacement of the first sentence of the third paragraph:
A neutral conductor may be used.
5.3supply disconnecting (isolating) device5.3.1 General
Addition:
When sewing units are interconnected by means of control systems to form sewing systems,only one supply disconnecting device shall be provided.