1、BRITISH STANDARDBS EN 50216-5:2002Incorporating Amendments Nos. 1, 2 and 3Power transformer and reactor fittings Part 5: Liquid level, pressure and flow indicators, pressure relief devices and dehydrating breathersThe European Standard EN 50216-5:2002, with the incorporation of amendments A1:2002, A
2、2:2005 and A3:2006, has the status of a British StandardICS 29.180g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 50216-5:2002This British Sta
3、ndard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 12 April 2002 BSI 2006ISBN 0 580 39502 2National forewordThis British Standard was published by BSI. It is
4、 the UK implementation of EN 50216-5:2002, incorporating amendments A1:2002, A2:2005 and A3:2006.The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. Tags indicating changes to CENELEC text carry the number of the CENELEC amendment. For example, text a
5、ltered by CENELEC amandment A1 is indicated in the text by !“.The UK participation in its preparation was entrusted to Technical Committee PEL/14, Power transformers.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to
6、 include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot of itself confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date Comments14727 4 November 2003 See national foreword16296
7、30 June 2006 See national foreword16806 29 December 2006 See national forewordEUROPEAN STANDARD EN 50216-5 January 2002 NORME EUROPENNE +A1 December 2002 EUROPISCHE NORM +A2 May 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europ
8、isches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50216-5:2002 ICS 29.180 English version Power transformer and reactor fitt
9、ings Part 5: Liquid level, pressure and flow indicators, pressure relief devices and dehydrating breathers Accessoires pour transformateurs de puissance et bobines dinductance Partie 5: Indicateurs de niveau de liquide isolant, manomtres et indicateurs de circulation de liquide isolant, limiteurs de
10、 pression et asscheurs dair Zubehr fr Transformatoren und Drosselspulen Teil 5: Flssigkeitsstandanzeiger, Druckanzeigeeinrichtungen und Durchflussmesser, Druckentlastungsventile und Luftentfeuchter This European Standard was approved by CENELEC on 2001-09-25. CENELEC members are bound to comply with
11、 the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard 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 Central Secretariat
12、 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 off
13、icial versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slove
14、nia, Spain, Sweden, Switzerland and United Kingdom. October 2006 +A3 Foreword This European Standard was prepared by the Technical Committee CENELEC TC 14, Power transformers. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50216-5 on 2001-09-2-25. The follow
15、ing 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) 2002-10-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2004-10-01 EN EN 50216-5 is
16、 to be read in conjunction with EN EN 50216-1. Foreword to amendment A1 This amendment was prepared by the Technical Committee CENELEC TC 14, Power transformers. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as amendment A1 to EN 50216-5:2002 on 2
17、002-11-01. The following dates were fixed: - latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2003-11-01 - latest date by which the national standards conflicting with the amendment have to be withdraw
18、n (dow) 2005-11-01 Foreword to amendment A2 This amendment to the European Standard EN 50216-5:2002 was prepared by the Technical Committee CENELEC TC 14, Power transformers. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as amendment A2 to EN 5021
19、6-5:2002 on 2004-12-01. The following dates were fixed: - latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2005-12-01 - latest date by which the national standards conflicting with the amendment have t
20、o be withdrawn (dow) 2007-12-01 EN 50216-5:2002 as well as this amendment are to be read in conjunction with EN 50216-1:2002. EN 50216-5:2002 2 Foreword to amendment A3 This amendment to the European Standard EN 50216-5:2002 was prepared by the Technical Committee CENELEC TC 14, Power transformers.
21、The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as amendment A3 to EN 50216-5:2002 on 2006-09-01. This amendment supersedes EN 50216-5:2002/A1:2002. The following dates were fixed: latest date by which the amendment has to be implementedat national
22、level by publication of an identical national standard or by endorsement (dop) 2007-09-01 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 2009-09-01 _ EN 50216-5:2002 3 Contents Page 1 Scope5 2 Normative references 5 3 Direct reading dial type li
23、quid level indicators5 3.1 General .5 3.2 Electrical characteristics of switch 6 3.3 Tests 6 4 Liquid pressure gauges - Differential pressure gauges .7 4.1 General .7 4.2 Electrical characteristics of switch 7 4.3 Tests 8 5 Liquid flow indicators8 5.1 General 8 5.2 Electrical characteristics of swit
24、ch 9 5.3 Tests 10 6 Pressure relief devices 10 6.1 General 10 6.2 Operating limits 6.3 Dimensions 6.4 Operating performance 13 6.5 Manufacturing features 13 6.6 Tests 14 7 Dehydrating breathers. 14 7.1 General 14 7.2 Selection criteria 15 7.3 Fixing arrangement and overall dimensions 15 7.4 Breather
25、 components. 16 7.5 Requirements. 17 7.6 Mounting arrangement. 17 7.7 Tests 17 1010EN 50216-5:2002 4 1 Scope 2 Normative references Addition to EN 50216-1: EN 60947-5-1 1997 Low-voltage switchgear and controlgear - Part 5-1: Control circuits + A12 1999 devices and switching elements - Electromechani
26、cal control circuit devices (IEC 60947-5-1:1997) 3 Direct reading dial type liquid level indicators 3.1 General Where the conservator for transformer tanks or other separated expansion chambers are required to be provided with a liquid level indicator of the direct reading dial type, it shall comply
27、 with the following: - In case of electric alarm contacts, a terminal box shall be provided with one earth terminal. - The terminals shall allow for connection of cables having a cross section area of 1,5 mm2to 4 mm. - The thread for the cable glands should be either Pg 16 or M20 x 1,5 to be agreed
28、between supplier and purchaser. - The liquid level indicator shall be fitted with a solid float operating on the displacement principle (hollow floats are not permitted). There shall be no direct mechanical contact between the float mechanism and the dial indicator. - The liquid level indicator shal
29、l withstand seismic and operational vibrations and environmental conditions in accordance with EN 50216-1. - Unless otherwise agreed, the liquid level at 20 C and the minimum and the maximum level shall be indelibly and clearly marked. - The movement of the pointer form the minimum to the maximum le
30、vel shall be clockwise when facing the dial. - The mounting arrangement of the indicator shall be such that it can be dismantled and removed from the outside of the conservator. It shall be possible to remove the dial, maintain or replace switches, without emptying the conservator. - The marking of
31、the dial plate shall be indelible. 3.2 Electrical characteristics of switch This device is based on EN 60947-5-1. #EN 50216-5 specifies the liquid level, pressure and flow indicators, pressure relief devices and dehydrating breathers for power transformer and reactor fittings. Except where otherwise
32、 specified or implied herein the above fittings shall comply with the requirements of EN 50216-1.$ EN 50216-5:2002 5 3.2.1 General The purchaser shall specify whether the switch shall have normally open, normally closed or change over contacts. Unless otherwise specified, the supplier shall provide
33、switches with change over contacts. The switch shall be able to operate at between maximum 5 % and minimum 95 % of the pointer deflection range. 3.2.2 Currents The rated current shall be 2 A r.m.s. and the short time current 10 A r.m.s. for 30 ms. Other values may be agreed between purchaser and sup
34、plier. 3.2.3 Breaking and making capacity 3.3 Tests 3.3.1 Routine tests 3.3.1.1 Leakage test The devices shall be subjected to an oil leakage test using one of the three following methods, at the choice of the supplier: - application of a gas pressure of 2,5 105Pa for 2 min at ambient temperature; -
35、 application of a pressure of 1 105Pa for 30 min to the relay filled with oil at a liquid temperature of 90 C; - application of a pressure of 1,4 105Pa for 6 h to the relay filled with oil at ambient temperature. The relay shall not leak. 3.3.1.2 Applied voltage test The test shall be carried out in
36、 accordance with Table 1 of EN 50216-1. Table 1 Breaking and making capacity (NO and NC contacts) Voltage Uninterrupted current (making capacity) Interrupted current (breaking capacity) 24 V d.c. to 220 V d.c. 2 A 100 mA L/R 0,5 Other values may be agreed between purchaser and supplier. The minimum
37、contact life shall be 1 000 operations. Only in case that the device has to operate in a system at 24 V d.c. and making capacity up to 0,5 VA, the switches shall be able to make a low current down to 10 mA even after one year of non-operation. % application of a pressure of 1 105Pa for 30 min to the
38、 relay filled with oil at a liquid temperature of 90 C; application of a pressure of 1,4 105Pa for 6 h to the relay filled with oil at ambient temperature. The relay shall not leak. 5.3.1.2 Applied voltage test The test shall be carried out in accordance with Table 1 of EN 50216-1. 5.3.1.3 Functiona
39、l test A functional test shall be carried out to prove the mechanical and electrical operation of the indicator and associated switches. 5.3.2 Type test The devices shall be subjected to a vacuum test of an absolute pressure of 2,5 kPa for 24 h. This test shall be followed by the test as detailed in
40、 5.3.1.1 above. #6 Pressure relief devices 6.1 General Pressure relief device, for use in liquid immersed transformer and reactor tanks, in order to release the excess of internal pressure due to fault, so co-operating to the integrity of the tank. 6.2 Operating limits The device shall be capable to
41、 be installed on the tank cover and walls, in each position or any inclination, without alteration of its operating performance. It is possible to mount more than one device on each transformer. 6.3 Dimensions 6.3.1 Flanged connection design The fixing flange sizes are based on ND, which is the diam
42、eter of the opening hole in the tank.$ EN 50216-5:2002 10 #Tables 4, 5 and 6 are based on the Figures 1, 2 and 3 respectively. Table 4 Fixing interface dimensions according to Figure 1 Size Dimensions flange Holes D1 (max) mm D2 mm D3 mm A mm Number A ND 50 mm 170 125 18 14 4 B ND 80 mm 200 160 18 1
43、6 4 C ND 125 mm 280 210 18 16 8 D ND 150 mm 285 240 18 16 8 E ND 200 mm 350 295 22 18 8 F ND 150 mm 290 235 16 13 6 G ND 125 mm 280 235 16 13 6 NOTE The flange can also be square. Figure 1 Flange interface Figure 2 Maximum overall dimensions$ EN 50216-5:2002 11 #Table 5 Overall dimensions according
44、to Figure 2 Size Max dimensions without oil spray protection and accessoriesmm D7 (max) mm HE (max) mm HI (max) mm A ND 50 mm 200 150 80 B ND 80 mm 250 200 150 C ND 125 mm 300 300 180 D ND 150 mm 360 300 180 E ND 200 mm 400 400 250 F ND 150 mm 300 300 180 G ND 125 mm 300 300 180 6.3.2 Threaded conne
45、ction design Table 6 Fixing interface and overall dimensions according to Figure 3 Size Max overall dimensions Threaded connection D1 mm HE mm HI mm D2 mm ISO 228 1 60 40 40 1” 2 80 40 40 2” Figure 3 Mounting interface and general overall dimensions$ EN 50216-5:2002 12 6.4 Operating performance Nomi
46、nal operating pressure: the pre-fixed overpressure value shall be agreed between supplier and purchaser within the standard range from 20 kPa up to 90 kPa, with 10 kPa steps, with a tolerance of 5 kPa to + 7 kPa. Nominal operating pressure above the standard range ( 90 kPa) shall be agreed between s
47、upplier and purchaser. The device shall be capable to reclose when the overpressure is terminated. 6.5 Manufacturing features 6.5.1 Devices according to Figure 1 and Figure 2 Flanged design, typically used on power transformers and reactors. 6.5.1.1 Description It can be fit, upon request, with oil
48、spray protection, visual indicator of operation with manual reset, one or more electric contacts. The characteristics of the electric contacts shall be according to Table 7. 6.5.1.2 Vent screw The device shall be fitted with a vent screw for bleeding air or gas bubbles which may alter the correct fu
49、nctioning. $# The maximum pressure without any oil leakage is equal to the nominal operating pressure less 10 kPa. The device is composed of a flanged body and a spring loaded shutter; design can be “spring out of tank” or “spring inside tank”. Table 7 Breaking and making capacity (NO and NC contacts) Voltage Uninterrupted current (making capacity) Interrupted current (breaking capacity) 24 V d.c. to 220 V d.c. 2 A 100 mA L/R 0,5 Other values may be agreed between
