【正文】 5 186。C. After the parts were dried during 10 min in a drying oven at a temperature of 100 186。C 177。 5 186。 they are then immersed in a solution to 10 % of ammonium chloride in water maintained at a temperature of 20 186。 1 kg and must be assembled on a rigid frame via pivots. This frame is fixed to solid wall. The design of the testing device is such as: – the counter can be moved horizontally and can turn around an axis perpendicular to the surface of plywood。 2 N and the additional load 500 N 177。 1 mm above the axis of the striking part. To determine Rockwell hardness of the polyamide striking part, one uses a ball with a diameter 12,7 mm 177。C and not to vary during the duration of test of more than 3 K. The lightning strikes counters must be protected from a heating or an excessive external cooling. Mechanical tests The test is carried out on the part accessible from the lightning strikes counter, assembled under the normal operating conditions. The samples are subjected to mechanical impacts. Testing device The lightning strikes counter is mounted on an impact test apparatus according to Clause 4 of EN 60068275:1997, as shown in Figure 1. The impact test apparatus is mounted on a solid wall or structure providing sufficient support. The striking part has a mass of 150 g 177。 – assembly instructions with reference and date. Assembly of the lightning strike counters The counters must be mounted in accordance with the instructions specified by the manufacturer in his assembly instructions. Number of samples submitted for testing The number of samples is 3 for the electric tests and 1 for the other tests. NOTE The use of the same sample for several tes ts is possible af ter agreement of the manufac turer. Conditions of ambient temperature and moisture Unless otherwise specified, the tests are carried out at an ambient temperature ranging between 5 176。 d) the degree of protection (IP) if applicable。 b) the reference of the type or the serial number。s and a time to halfvalue of 20 181。r Elektrotechnische Normung Central Secretariat: avenue Marnix 17, B 1000 Brussels 169。en de Normalisation Electrotec hni que Europ228。hler This European Standard was approved by CENELEC on 20201101. CENELEC members are bound to ply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Uptodate lists and bibliographical references concerning such national standards may be obtained on application to the Central 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 status as the official versions. CENELEC members are the national electrotechnical mittees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. CENELEC European Committee for Electrotechnical Standardiz ati on Comit233。ENNE EUROP196。 BS EN 501646:2020 BSI British Standards Lightning Protection Components (LPC) — Part 6: Requirements for lightning strike counters NO COPYIN G WITHOU T BSI PERMIS SION EXCEPT AS PERMITTED BY COPYRIGHT LAW raising standards worldwide? BS EN 501646:2020 BRITISH STANDARD National foreword This British Standard is the UK implementatio n of EN 501646:2020. The UK participation in its preparation was entrusted to Technical Committee GEL/81, Protection against lightning. A list of anizations represented on this mittee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. 169。 BSI 2020 ISBN 978 0 580 62737 8 ICS Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2020 Amendments issued since publication Amd. No. Date Text affected BS EN 501646:2020 EUROPEAN STANDARD EN 501646 NORME EUROP201。ISCHE NORM January 2020 ICS English version Lightning Protection Components (LPC) Part 6: Requirements for lightning strike counters Composants de protection contre la foudre (CPF) Partie 6: Compteur de coups de foudre Bitzschutzbauteile Teil 6: Anforderungen an Blitzz228。 Europ233。isches Komitee f252。 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 501646:2020 E BS EN 501646:2020 EN 501646:2020 – 2 – Foreword This European Standard was prepared by the Technical Committee CENELEC TC 81X, Lightning protection. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 501646 on 20201101. The following dates were fixed: – latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 20201101 – latest date by which the national standards c