IEC 62237 pdf download – Live working – Insulating hoses with fittings for use with hydraulic tools and equipment

IEC 62237 pdf download – Live working – Insulating hoses with fittings for use with hydraulic tools and equipment
1 scope
This International Standard is applicable to mobile insulating hoses with fittings used withhydraulic tools and equipment for live working at nominal voltages exceeding 1 kV r.m.s. atpower frequency.
The use under D.C.conditions is not covered by this standard.
Insulating hoses with fittings are used to provide a connection between the hydraulic tool andthe pump which are at different potentials.They are not considered as a fixed component of alive working device (e.g. aerial device). They can be connected and disconnected undernegligible pressure.They can be directly handled by the user.
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 60060-1:1989，High-voltage test techniques – Part 1: General definitions and testrequirements
IEC 60060-2,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-DB:20021),Graphical symbols for use on equipment
IEC 61318:2003,Live working – Quality assurance plans applicable to tools,devices andequipment
IEC 61477;2001,Live working – Minimum requirements for the utilization of tools, devices andequipment
Amendment 1:20022)
3Terms and definitions
For the purpose of this document, the following terms and definitions and the ones included inIEC61318 apply.
3.1
insulating hose with fittings
insulating and pressure resistant hose and fittings which are used to provide a connectionbetween parts of hydraulic equipment at different electric potentials
[Definition 12.1.4 of lEC 60743]
3.2
insulating hose
insulating and pressure resistant hose without fittings
3.3
maximum operating pressure
pressure specified by the manufacturer which shall not be exceeded during the use of theinsulating hose
3.4
insulating liquid (for hydraulic equipment)
insulating liquid which is used for the transmission of hydraulic energy between parts atdifferent electric potentials
[IEV 651-11-02]
4Requirements
4.1 Protection against corrosion
Metal parts shall be resistant to corrosion either by their own composition or by being suitablytreated.
NOTE When two metallic materials are used, they should be selected in such a way as to avoid electrolytic action.4.2Finishing and mechanical protection
The various components shall be designed so that they do not create the potential for injury.
4.3lnsulating parts
Insulation is achieved by using a proper length of insulating hose.End fittings shall not impairthe dielectric properties of the tooil.
The insulating parts shall be characterized by a special colour that shows their insulatingproperty.
NOTE Orange is a preferred colour to indicate insulating parts.
4.4Conductive parts
All conductive parts fixed to insulating parts shall be easily identifiable.
The exterior surface of the insulating part that contains a conductive element shall be clearlymarked by a line indicating the extreme position of the internal conductive part.
4.5 Markings
Each insulating hose with fittings shall be marked with the following permanent markings:- manufacturer’s name or trademark:
date of manufacture (month and year) and possibly identification number;maximum operating pressure (bar or MPa);
insulating length of the insulating hose with fittings;
symbol lEC-60417-5216(DB:2002-10) – Suitable for live working; double triangle (seeAnnex A);
NOTE The exact ratio of the height of the figure to the base of the triangle is 1,43.For the purpose ofconvenience, this ratio can be between the values of 1,4 and 1,5.
number of the relevant lEC standard immediately adjacent to the symbol with year ofpublication (4 digits).(IEC62237:2003).
The tolerance of the insulating length is 50 mm.
Markings shall be clearly legible to a person with normal or corrected vision，withoutadditional magnification.
The markings shall be resistant and shall not reduce the performance of the insulating hosewith fittings.
4.6lnstructions for use
Each insulating hose with fittings shall be supplied with the manufacturer’s written instructionsfor use and care. These instructions shall be prepared in accordance with the generalprovisions given in lEC 61477.
These instructions shall include as a minimum:-characteristics of required insulating liquid(s),
NOTE When the insulating hoses with fittings are to be used at low temperatures, user and manufacturer shouldmake sure that information on adequate insulating liquid(s) are included.
– minimum burst pressure;
– dimensions of the fittings, with tolerance ±1 mm;
diameters (internal and external) of the insulating hose, with tolerance 12 mm;minimum bending radius,with tolerance ±25 mm;
weight;
instructions for cleaning, storage and transportation;
– instructions for periodic testing, possible repair and disposal of the hose.
5 Type tests
5.1General
In order to show compliance with this standard,the manufacturer shall provide evidence thatthe following tests have been carried out successfully.