IEC 61478 pdf download – Travaux sous tension – Echelles en matériau isolant

IEC 61478 pdf download – Travaux sous tension – Echelles en matériau isolant

IEC 61478 pdf download – Travaux sous tension – Echelles en matériau isolant
1 scope
This International Standard is applicable to fully insulating spliced or hook ladders withextension or having a combination of insulating and conductive sections and used for liveworking on a.c. or d.c. electrical installations at 1 000 V and above for a.c. and 1 500 V andabove for d.c.
The ladders are classified functionally as Category 1 and Category 2.
This standard concerns only ladders made of synthetic material.
These ladders are used,to provide access,generally on overhead line structures and tofacilitate live working, either hot stick, barehanded or a combination of both.
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.
lEC 60050(151):2001,International Electrotechnical Vocabulary (IEV) – Chapter 151:Electricaland magnetic devices
IEC 60212:1971,Standard conditions for use prior to and during the testing of solid electricalinsulating materials
IEC 60417 (all parts)[DB-2000] 1), Graphical symbols for use on equipmentIEC 60743,Live working – Terminology for tools, equipment and devicesIEC 60855:1985,Insulating foam-filled tubes and solid rods for live workingIEC61235:1993,Live working – Insulating hollows tubes for electrical purposesIEC 61318:1994,Live working – Guidelines for quality assurance plans
ISo 2859-1:1999,Sampling procedures for inspection by attributes – Part 1: Samplingschemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection
lso 9000: 2000,Quality management systems – Fundamentals and vocabularyIso 9001:2000,Quality management systems – Requirements
Iso 9004:2000,Quality management and quality system elements – Guidelines forperformance improvements
For the purpose of this International Standard, the following definitions apply.
unit of a ladder consisting of a minimum of three rungs
base section
first element of a ladder designed to support other sections
NOTE lt may be the highest or lowest element of a ladder.
spliced ladder
ladder constructed of sections that are made of metal or synthetic material and splicedtogether
[IEC 60743,9.1.3]
insulating hook ladder
insulating ladder equipped to one end with permanent or removable hooks which can be rigidor can rotate
[IEC 60743,9.1.4]
insulating ladder extension
additional insulating section which can be fixed to an insulating hook ladder or another ladderextension
[IEC 60743,9.1.5]
support bracket
device designed to be fastened to any level of the structure and supporting the load of thespliced ladder
NOTE lt may also be fitted to the structure between spliced ladder sections.