IEC 62237-2003 pdf – 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 with hydraulic tools and equipment for live working at nominal voltages exceeding 1 kV r.m.s. at power 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 and the pump which are at different potentials. They are not considered as a fixed component of a live working device (e.g. aerial device). They can be connected and disconnected under negligible pressure. They can be directly handled by the user. 2 Normative 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 edition of the referenced document (including any amendments) applies. IEC 60060-1:1989, High-voltage test techniques – Part 1: General definitions and test requirements 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 electrical insulating materials IEC 60417-DB:2002 1) , Graphical symbols for use on equipment IEC 61318:2003, Live working – Quality assurance plans applicable to tools, devices and equipment IEC 61477:2001, Live working – Minimum requirements for the utilization of tools, devices and equipment Amendment 1:2002 2) 3 Terms and definitions For the purpose of this document, the following terms and definitions and the ones included in IEC 61318 apply.
3.1 insulating hose with fittings insulating and pressure resistant hose and fittings which are used to provide a connection between parts of hydraulic equipment at different electric potentials [Definition 12.1.4 of IEC 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 the insulating hose 3.4 insulating liquid (for hydraulic equipment) insulating liquid which is used for the transmission of hydraulic energy between parts at different electric potentials [IEV 651-11-02] 4 Requirements 4.1 Protection against corrosion Metal parts shall be resistant to corrosion either by their own composition or by being suitably treated. NOTE When two metallic materials are used, they should be selected in such a way as to avoid electrolytic action. 4.2 Finishing and mechanical protection The various components shall be designed so that they do not create the potential for injury. 4.3 Insulating parts Insulation is achieved by using a proper length of insulating hose. End fittings shall not impair the dielectric properties of the tool. The insulating parts shall be characterized by a special colour that shows their insulating property. NOTE Orange is a preferred colour to indicate insulating parts. 4.4 Conductive 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 clearly marked by a line indicating the extreme position of the internal conductive part. All conductive parts shall be designed and manufactured so as to limit the risk of short- circuits.
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 IEC-60417-5216(DB:2002-10) – Suitable for live working; double triangle (see Annex A); NOTE The exact ratio of the height of the figure to the base of the triangle is 1,43. For the purpose of convenience, this ratio can be between the values of 1,4 and 1,5. – number of the relevant IEC standard immediately adjacent to the symbol with year of publication (4 digits), (IEC 62237:2003). The tolerance of the insulating length is ±50 mm. Markings shall be clearly legible to a person with normal or corrected vision, without additional magnification. The markings shall be resistant and shall not reduce the performance of the insulating hose with fittings. 4.6 Instructions for use Each insulating hose with fittings shall be supplied with the manufacturer’s written instructions for use and care. These instructions shall be prepared in accordance with the general provisions given in IEC 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 should make 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 ±2 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 5.1 General In order to show compliance with this standard, the manufacturer shall provide evidence that the following tests have been carried out successfully.