IEC 61479 pdf download – Travaux sous tension – Protecteurs de conducteurs flexibles en matériau isolant Live working – Flexible conductor covers (line hoses) of insulating material
1 scope
This International Standard is applicable to flexible insulating covers (line hoses) for theprotection of workers from accidental contact with live or earthed electrical conductors and forthe avoidance of short circuits during live working.
1.1Classes
Five classes of conductor covers，differing in electrical characteristics，are provided anddesignated as class 0, class 1, class 2, class 3, and class 4.
1.2Categories
Six categories of conductor covers differing in composition and properties are provided:category A – acid resistant,category H – oil resistant, category C – formulated for extreme lowtemperature environments,category W – formulated for extreme high temperature environ-ments, category Z – ozone resistant, and category P – formulated for humid environment.
NOTE Types ll and lll material of ASTM D-1050 would be category z.
1.3Styles
Various styles of conductor covers,differing in construction characteristics are available andsix of these are designated as style A, styie B, style C, style D, style E, (see figure 1), andstyle F.
2Normative references
The following referenced documents are indispensable for the application of this document.For dated references, only the edition cited applies.For undated references, the latest editionof the referenced document (including any amendments) applies.
IEC 60050(151):1978,International Electrotechnical Vocabulary (IEV) – Chapter 151:Electrical and magnetic devices
IEC 60050(212):1990,International Electrotechnical Vocabulary(IEV) – Chapter 212:lnsulating solids, liquids and gases
IEC 60050(601):1985,International Electrotechnical Vocabulary (IEV) – Chapter 601:Generation, transmission and distribution of electricity- General
IEC 60050(651):1999,International Electrotechnical Vocabulary (IEV) – Chapter 651:Liveworking
IEC 60060-1:1989，High-voltage test techniques – Part 1: General definitions and testrequirements
lEC 60060-2:1994,High-voltage test techniques – Part 2: Measuring systems
IEC 60212:1971,Standard conditions for use prior to and during the testing of solid electricalinsulating materials
IEC 60417 (all parts),Graphical symbols for use on equipment
IEC 61318:1994,Live working – Guidelines for quality assurance plans
ISO 472:1999, Plastics – Vocabulary
ISO 1817:1999,Rubber,vulcanized – Determination of the effect of liquids
ISO 2592:2000,Determination of flash and fire points – Cleveland open cup method
ISO 2859-1:1999，Sampling procedures for inspection by attributes – Part 1: Samplingschemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
Iso 2977:1997，Petroleum products and hydrocarbon solvents – Determination of anilinepoint and mixed aniline point
IsO 3104:1994，Petroleum products – Transparent and opaque liquids – Determination ofkinemafic viscosify and calculation of dynamic viscosity
lsO 9001:1994，Quality systems – Model for quality assurance in design，development,production, installation and servicing
Iso 9002:1994,Quality systems – Model for quality assurance in production,installation andservicing
Iso 9003:1994,Quality systems – Model for quality assurance in final inspection and test
3Definitions
For the purpose of this International Standard, the following definitions apply.
3.1
protective cover
rigid or flexible cover made of insulating material used to cover energized andlor dead partsand/or adjacent earthed (grounded) parts in order to prevent contact
NOTE A protective cover is generally designed to provide a required insulation level which makes it able toprovide protection only when a worker inadvertently comes into contact with the protective cover and for only a
short duration.
[IEV 651-04-01, modified]
3.2
conductor cover
protective cover made of insulating material and used to shroud the conductor
NOTE These covers can be either flexible or rigid. In general, they are commonly called “line hose”or “lineguards”.
[IEV651-04-03]
3.3
elastomer
generic term that includes rubber,latex and elastomeric compounds that may be natural orsynthetic or a mixture or a combination of both
3.4
plastic
material which contains as an essential ingredient a high polymer and which at some stage ofits processing into finished products can be shaped by flow
[ISO 472 modified]
3.5
proof test voltage
the specified voltage that is applied to a device for the time defined under specific conditionsto assure that the electrical strength of the insulation is above a specific value
3.6
flashover
breakdown between electrodes in a gas or a liquid or in vacuum, at least partly along thesurface of solid insulation
[IEV 212-01-37]
3.7
puncture
path produced through a solid by a breakdown producing permanent damage. The term isalso used as a synonym for electrical breakdown in solids
[IEV 212-01-38]
3.8
acceptance test
contractual test to prove to the customer that the device meets certain conditions of itsspecification
[IEV 151-04-20]
3.9
routine test
test to which each device is subjected during or after manufacture to ascertain whether itcomplies with certain criteria
[IEV 151-04-16]
3.10
sampling test
test on a number of devices taken at random from a batch[IEV 151-04-17]
IEC 61479 pdf download – Travaux sous tension – Protecteurs de conducteurs flexibles en matériau isolant Live working – Flexible conductor covers (line hoses) of insulating material
