IEC 60895:2002 pdf download

IEC 60895:2002 pdf download.Live working – Conductive clothing for use at nominal voltageup to 800 kV a.c. and +600 kV d.c.
ISO 6330:2000. Textiles — Domestic washing and drying procedures for textile testing
ISO 9000:2000, Quality management systems — Fundamentals and vocabulary
Iso 9001:2000, Quality management systems — Requirements
ISO 9004:2000. Quality management systems — Guidelines for performance improvements
3 Terms and definitions
For the purposes of this International Standard, the following definitions apply.
NOTE Further information on terminology is illustrated in figure 1.
3.1
conductive clothing
clothing made of natural or synthetic material with integral interwoven conductive fibres, or layers, used to provide electrical continuity between all parts of the clothing and a reduction of electric field
[IEC 60743, definition 8.2.7, modified]
3.2
conductive material
material composed of metallic threads or non-metallic conductive substances and natural or synthetic threads closely woven, knitted, or layered
3.3
equipotential bonding lead (bonding lead)
flexible metallic connection used by the worker to connect or disconnect his or her conductive clothing, bucket or screen, to or from another conductive part to create equipotential bonding
NOTE I This lead is not an earthing device.
NOTE 2 The means of securing or connecting the lead shall be such that under emergency conditions, for example, a fall, the lead can separate.
[1EV 651-07-07, modified]
3.4
head cover (hood)
part of the clothing, either as a separate item or integrated into a complete garment, that covers the head
3.5
face screen for electrical works
protective device made of conductive, solid, or meshed material
NOTE It provides electrical continuity with the conductive clothing of the worker and a reduction of electric field to the face, or part thereof
[IEC 60743, definition 8.4.3]
3.6
conductive overshoe sock
sock made of conductive material and worn over shoelboot
3.7
garment
main body of the clothing consisting of jacket and trousers
3.8
component parts
additional elements of the complete clothing such as gloves, socks, head protection, and footwear worn in addition to the main garment and bounded to it
3.9
shielding efficiency
base log 10 of the ratio of a voltage without the conductive clothing to the voltage measured at the spot with conductive clothing
3.10
screening efficiency
per cent ratio of the total current injected into the conductive clothing to the current flowing in the body
3.11
equipotential bonding
electrical connection putting various exposed conductive parts and extraneous conductive parts at a substantially equal potential
(1EV 826-04-09)
4 Technical requirements
4.1 General
The conductive clothing shall constitute an electrically continuous assembly for the worker.
If press studs, zip fasteners, hooks and eyes or any other method of fastening are used in the assembly of the complete clothing, care should be taken to ensure that the electrical conductivity of the clothing is not impaired.
Bonding lead shall be capable of withstanding anticipated electrical and mechanical stresses.
4.2 Technical requirements for conductive material
The material used to manufacture the conductive clothing shall have the following properties.
NOTE The material used to manufacture the conductive clothing should be resistant to abrasion and to tearing.
4.2.1 Flame retardancy
The material used in conductive clothing shall not ignite and continue to burn when exposed to an ignition source.
4.2.2 Electrical resistance
This quality can be considered as a basic element which determines the current-carrying capability and the spark-discharge properties of the material.
The only direct consequence for a worker of the correct value of electrical resistance is the low potential difference between two points of the cloth in contact with the skin, which is thus an element of comfort.
4.2.3
Current-carrying capability
During the worker’s travel to his working position (from the metallic structure of the tower or from the ground in an aerial device) and at the moment of his connection to the live
conductor, capacitive currents flow through his clothing. It is necessary for the clothing to be able to conduct them. There shall be no damage to the material.
4.2.4
Shielding and screening efficiencies
The material used for the conductive clothing or the component parts shall attenuate the electric field. The attenuation of the material is determined by shielding efficiency, and that of the conductive clothing by screening efficiency. Shielding and screening efficiencies are defined in 3.9 and 3.10.
These efficiencies shall meet the requirements of this standard.