1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 50340:2010Hydraulic cable cutting devices Devices to be used on electrical installations with nominal voltage up to AC 30 kVBS EN 50340:2010 BRITISH STANDARDNational forewo
2、rdThis British Standard is the UK implementation of EN 50340:2010. Itsupersedes BS EN 50340:2001, which will be withdrawn on01 April 2013.The UK participation in its preparation was entrusted to TechnicalCommittee PEL/78, Tools for live working.A list of organizations represented on this committee c
3、an beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011 ISBN 978 0 580 62577 0 ICS 13.260; 29.240.20; 29.260.99 Compliance with a British Standard cannot confer immuni
4、ty fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 28 February 2011. Amendments issued since publicationDate T e x t a f f e c t e dBS EN 50340:2010EUROPEAN STANDARD EN 50340 NORME EUROPENNE EUROPISCHE NORM May 2010 CENEL
5、EC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide
6、 for CENELEC members. Ref. No. EN 50340:2010 E ICS 13.260; 29.240.20; 29.260.99 Supersedes EN 50340:2001 + corr. Feb.2002English version Hydraulic cable cutting devices - Devices to be used on electrical installations with nominal voltage up to AC 30 kV Dispositifs coupe cbles hydrauliques - Disposi
7、tifs utiliser sur des installations lectriques de tension nominale jusqu 30 kV en courant alternatif Hydraulische Kabelschneidgerte - Gerte zur Verwendung an elektrischen Anlagen mit Nennwechselspannungen bis 30 kV This European Standard was approved by CENELEC on 2010-04-01. CENELEC members are bou
8、nd to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the C
9、entral Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same
10、 status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlan
11、ds, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 50340:2010EN 50340:2010 2 Foreword This European Standard EN 50340 was prepared by the Technical Committee CENELEC TC 78, Equipment and tools for live working. It was submitted to the
12、formal vote as an amendment and was approved by CENELEC as a new edition of EN 50340 on 2010-04-01. This EN 50340:2010 supersedes EN 50340:2001. The principal changes compared to EN 50340:2001 are as follows (minor changes are not listed): - In the scope were defined limits for the pressure inside t
13、he cable cutting devices, to ensure that the products are outside the Pressure Equipment Directive. - The definitions were corrected and defined more clearly. - According to the operating method and the local regulation, two possible insulating hose assemblies can be applicable: o Method A: The insu
14、lating hose assembly has a length of 10 m. Detailed references to EN 62237 with some amendments have been added for checking the insulation hose line. In Annex A is recommended a distance of minimum 10 m as safety zone. o Method B: The insulating hose assembly consists of 3 m non insulating hose plu
15、s 320 mm hose according to EN 62237 which gives a sufficient insulation for the worker. - A note was inserted in 5.6 and 5.12 to consider the kind of working of the safety valve. - The parameters of the metal wire were inserted in 5.7. - Subclause 5.10 was renamed into “Stability” and the conditions
16、 of the test were amended. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The following dates were fixed: latest date by which the amend
17、ment has to be implementedat national level by publication of an identical national standard or by endorsement (dop) 2011-04-01 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 2013-04-01 The cable cutting devices specified here are designed to pr
18、otect the user while he is verifying whether the cable is dead. In some countries, it is necessary where the cable to be cut is live that the first action of the cutting device is to make, on a multi-phases cable, only a single-phase fault to earth so that the protective devices of the network can o
19、perate on a single-phase fault. This European Standard specifies requirements and tests for these cable cutting devices. _ BS EN 50340:2010 3 EN 50340:2010 Contents 1 Scope . 5 2 Normative references . 5 3 Definitions . 6 4 Requirements 7 4.1 General . 7 4.2 Cutting head . 7 4.3 Insulating hose asse
20、mbly . 8 4.4 Insulating hydraulic fluid . 9 4.5 Pump. 9 4.6 Safety valve 9 4.7 Reverse flow valve 9 4.8 Pressure gauge 9 4.9 Hydraulic coupler 9 4.10 Bonding and earthing system . 9 4.11 Marking . 10 4.12 Instructions for use . 11 5 Tests 11 5.1 General . 11 5.2 Inspection, instructions for use and
21、marking 11 5.3 Test of the insulating hose assembly . 11 5.4 Dielectric strength of the hydraulic fluid 12 5.5 Hardness of the blade(s) 12 5.6 Test under stress 12 5.7 Self-acting opening test 13 5.8 Accuracy of cutting . 13 5.9 Working force of the pump 14 5.10 Stability . 14 5.11 Operation of the
22、safety valve 14 5.12 Pressure strength of the cable cutting device 15 5.13 Functional test 15 5.14 Test on earthing system . 15 6 Conformity assessment of cable cutting devices having completed the production phase . 16 Annex A (normative) Instructions for use 23 A.1 Explanation of marking . 23 A.2
23、Description of cable cutting device . 23 A.3 Information about use according to the rules and procedures . 23 A.4 Guidance in case of faults of the cable cutting device . 24 A.5 Guidance after short circuiting 24 Annex B (normative) List of type tests . 25 Annex C (normative) Classification of defec
24、ts and tests to be allocated . 26 Annex D (informative) Background . 27 BS EN 50340:2010EN 50340:2010 4 Figures Figure 1 Example of cable cutting device . 17 Figure 2 “Double triangle” symbol 18 Figure 3 Self-acting opening test Tackle-points to strain the blade(s) 19 Figure 4 Pump force Test arrang
25、ement. 20 Figure 5 Stability Test arrangement 21 Figure 6 Earthing system Test arrangement . 22 Tables Table 1 Forces to be applied to the blade(s) to oppose the opening action 13 Table B.1 List of type tests . 25 Table C.1 Classification of defects and associated requirements and tests 26 BS EN 503
26、40:2010 5 EN 50340:2010 1 Scope This European Standard is applicable to cable cutting devices to be used to verify that a cable is dead in accordance with the rules given in EN 50110-1. The following limits apply to the cable cutting devices: - pressure less than 1 000 bar or pressure (bar) x volume
27、 (l) less than 10 000; - fluid outside the categories listed in Article 9 Group 1 (explosive, extremely flammable, highly flammable, flammable (where the maximum allowable temperature is above flashpoint), very toxic, toxic, oxidizing) of the Pressure Equipment Directive. Cable cutting devices speci
28、fied in this standard are for use on systems with nominal voltage up to 30 kV AC and nominal frequencies up to 60 Hz and shall only be suitable for operation by foot or by hand. This European Standard does not deal with motorised cable cutting devices. For devices to be used on systems with nominal
29、voltages above 30 kV AC this standard should be used as a guide but additional requirements and tests shall be agreed between manufacturer and customer to provide for an equivalent level of safety. These devices are not designed to be used on cables with special armour, or with steel wires or steel
30、tapes more than 1 mm in diameter or thickness. 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
31、amendments) applies. EN 10016-2:1994, Non-alloy steel rod for drawing and/or cold rolling Part 2: Specific requirements for general purposes rod EN 12164:1998 + A1:2000, Copper and copper alloys Rod for free machining purposes EN 50110-1:2004, Operation of electrical installations EN 60156:1995, Ins
32、ulating liquids Determination of the breakdown voltage at power frequency Test method (IEC 60156:1995) EN 61111:2009, Live working Electrical insulating matting (IEC 61111:2009) EN 61230:1995 1), Live working Portable equipment for earthing or earthing and short-circuiting (IEC 61230:1993, mod.) EN
33、61318:2008, Live working Conformity assessment applicable to tools, devices and equipment (IEC 61318:2007) EN 62237:2005, Live working Insulating hoses with fittings for use with hydraulic tools and equipment (IEC 62237:2003, mod.) 1)Superseded by EN 61230:2008, Live working Portable equipment for e
34、arthing or earthing and short-circuiting (IEC 61230:2008). BS EN 50340:2010EN 50340:2010 6 HD 437 S1:1984, Standard conditions for use prior to and during the testing of solid electrical insulating materials (IEC 60212:1971) EN ISO 6507-1:2005, Metallic materials Vickers hardness test Part 1: Test m
35、ethod (ISO 6507-1:2005) 3 Definitions For the purposes of this document, the following terms and definitions apply. 3.1 cable cutting device a portable device which is used to cut cables in a safe manner. This device is used to verify that a cable is dead at the work site. It consists of the followi
36、ng components (see Figure 1): - a cutting head, this contains the cutting blade(s); - a hydraulic pump; - a length of insulating hose with fittings (insulating hose assembly) to connect the cutting head and the pump; - insulating hydraulic fluid; - an earthing system 3.2 cutting head that part (comp
37、onent) of the device which contains the cutting blade(s) and which is applied to the cable to be cut. The blade(s) is(are) operated by means of hydraulic pressure 3.3 pump that part of the device which generates pressure in the insulating hydraulic fluid within the hose to operate the cutting head 3
38、.4 insulating hose an insulating and pressure resistant hose used as part of an insulating hose assembly 3.5 insulating hose assembly an insulating and pressure resistant component consisting of an insulating hose with fittings at each end for the connection of parts of hydraulic equipment at differ
39、ent electric potentials 3.6 insulating hydraulic fluid fluid with suitable electrical insulating properties used to equalize the pressure between the pump and the cutting head 3.7 reverse flow valve a valve for manual operation which is designed and installed for the backflow of fluid from the press
40、ure compartment to the storage compartment after having cut through the cable completely BS EN 50340:2010 7 EN 50340:2010 3.8 safety valve a valve designed and installed to release the pressure of fluid in the pressure compartment when the maximum operating pressure of the hydraulic system is reache
41、d, so that it protects the system against overpressure 3.9 hydraulic coupler a pair of fittings to permit a connection of hydraulic components NOTE Some couplers can be separated by hand, others may require the use of a tool. 3.10 maximum operating pressure the operating pressure specified by the ma
42、nufacturer which shall not be exceeded during the functioning of the cable cutting device 3.11 blade(s) metallic part(s) with a sharp edge or edges which is designed to penetrate the cable in such a way that the cable will be cut into two separate parts 3.12 earthing system all those necessary conne
43、ctions, conductors and fittings used to ensure that the electrical potential of an equipment is as close as practicable to the earth potential (i.e. at or about 0 V to earth) IEV 604-04-02, mod. 3.13 type test a test performed of one or more devices made to a certain design to show that the design m
44、eets certain specifications IEV 151-04-15 4 Requirements 4.1 General 4.1.1 The device shall operate correctly and safely indoor, outdoor, under rain and with a range of ambient temperature between -20 C to +40 C. 4.1.2 The complete cable cutting device shall safely withstand the maximum operating pr
45、essure. 4.1.3 For cable cutting devices which can be dismantled, suitable means for the storage and transportation of the separate components shall be provided. These means shall be designed to prevent damage to the component parts in transit and pollution/contamination of all the insulating parts(i
46、.e. hydraulic fluid, insulating hose assemblies). 4.2 Cutting head 4.2.1 The design of the cutting head shall be such that it can be transported in a safe manner and is safe and easy to locate on a cable. 4.2.2 The mass of the cutting head shall not exceed 20 kg so that it can be safely and readily
47、operated by one person. 4.2.3 The cutting head shall be designed so that when properly applied, it shall not be displaced during a cutting operation except when a short circuit fault occurs. BS EN 50340:2010EN 50340:2010 8 4.2.4 The cutting head shall be capable of accepting all cables up to the max
48、imum diameter indicated by the manufacturer. 4.2.5 The blade(s) of the cutting head shall be made of a durable metallic material with a surface hardness ranging between 558 HV5 and 715 HV5 (50 HRC up to 60 HRC) (see EN ISO 6507-1). 4.2.6 The cutting head shall be designed to ensure that cutting is d
49、one continuously until the cable is cut through completely. 4.2.7 If the hydraulic pressure disappears for any reason the blade(s) shall return to the starting position. 4.2.8 The cutting head shall be connected to the insulating hose assembly by a coupler which requires the use of a tool to separate it. 4.2.9 The cutting head(s) shall be compatible with the pump as specified by the manufacturer of the pump. 4.3 Insulating hose assembly According to the operating method and t
