1、BRITISH STANDARD BS EN 50216-3:2002 Incorporating Amendments Nos. 1 and 2 Power transformer and reactor fittings Part 3: Protective relay for hermetically sealed liquid-immersed transformers and reactors without gaseous cushion The European Standard EN 50216-3:2002, incorporating amendments A1:2002
2、and A2:2006, has the status of a British Standard ICS 29.180 BS EN 50216-3:2002 This British Standard, 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 2
3、002 BSI 2006 ISBN 0 580 39500 6 National foreword This British Standard was published by BSI. It is the UK implementation of EN 50216-3:2002, incorporating amendments A1:2002 and A2:2006. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. Tags indica
4、ting changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment 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 PEL/14 can be
5、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. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd.
6、 No. Date Comments 14728 4 November 2003 Changes to Table 2 16777 30 November 2006 See national forewordEUROPEAN STANDARD EN 50216-3 January 2002NORME EUROPENNE +A1 December 2002 EUROPISCHE NORM CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotec
7、hnique Europisches 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 50216-3:2002 E ICS 29.180 English version Power transformer an
8、d reactor fittings Part 3: Protective relay for hermetically sealed liquid-immersed transformers and reactors without gaseous cushion Accessoires pour transformateurs de puissance et bobines dinductance Partie 3: Relais de protection pour transformateurs et bobines dinductance hermtiques immergs dan
9、s un liquide et sans matelas gazeux Zubehr fr Transformatoren und Drosselspulen Teil 3: Schutzrelais fr ohne Gaspolster hermetisch verschlossene flssigkeitsgefllte Transformatoren und Drosselspulen CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the cond
10、itions 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 Central Secretariat or to any CENELEC member. This European Standard exists in th
11、ree 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 electrotechni
12、cal committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. +A2 October 2006EN 50216-3:2002 2 Foreword This European Standar
13、d 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 50216-3 on 2001-09-25. The following dates were fixed: - latest date by which the EN has to be implemented at national level by public
14、ation 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 50216-3 is to be read in conjunction with EN 50216-1. Foreword to amendment A1 This amendment was prepared by the
15、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 50216-3:2002 on 2002-11-01. The following dates were fixed: - latest date by which the amendment has to be implemented at na
16、tional 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 withdrawn (dow) 2005-11-01 Foreword to amendment A2 This amendment to the European Standard EN 50216-3:2002 was pre
17、pared 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 50216-3:2002 on 2006-10-01. This amendment A2 supersedes EN 50216-3:2002/A1:2002. The following dates were fixe
18、d: latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2007-10-01 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 2009-10-01 _ 3 EN 50216-3:2002 Conte
19、nts Page 1 Scope. 4 2 Normative references 4 3 Identification of relays 4 4 Service conditions 5 4.1 Maximum inclination.5 4.2 Operating pressure.5 4.3 Sensitivity of the relay contacts to magnetic fields 5 5 Outline and mounting details. 5 6 Operational performance5 6.1 General 5 6.2 Gas collection
20、. 5 6.3 Leakage detection 5 6.4 Pressure detection.5 6.5 Temperature detection (for relay type 2) 6 6.6 Temperature indicator6 7 Electrical characteristics of switch 6 7.1 Rated currents6 7.2 Breaking and making capacity 6 7.3 Operation time6 8 Mechanical requirements.6 8.1 Terminal box6 8.2 Testing
21、 facilities 7 8.3 Gas sampling . 7 8.4 Presence of gas in the relay. 7 9 Nameplate 7 10 Tests. 7 10.1 Routine tests 7 10.2 Type tests. 7 EN 50216-3:2002 4 1 Scope EN 50216-3 applies to protective relays for hermetically liquid-immersed transformers, complying with the EN 60076 series, and reactors,
22、complying with EN 60289, without gaseous cushions for indoor or outdoor installation. This part of EN 50216 defines the operating limits, outline and mounting details, operational performance, electrical characteristics, dynamic characteristics. Should environmental conditions and dynamic stress req
23、uirements differ from those detailed in clause 3 of EN 50216-1, EN 50216-3 may then be applied by agreement between purchaser and supplier for those parts which are not affected by such abnormal installation conditions. NOTE EN 50216-3 may be used as far as applicable for relays with mercury switche
24、s. Restrictions on the use of mercury devices may be imposed by national regulations. 2 Normative references Addition to EN 50216-1: EN 50005 1976 Low-voltage switchgear and controlgear for industrial use - Terminal marking and distinctive number - General rules EN 50102 1995 Degrees of protection p
25、rovided by enclosures for electrical equipment against external mechanical impacts (IK code) EN 60076 series Power transformers (IEC 60076 series) EN 60289 1994 Reactors (IEC 60289:1988, mod.) EN 60947-5-1 + A12 1997 1999 Low-voltage switchgear and controlgear - Part 5-1: Control circuits devices an
26、d switching elements - Electromechanical control circuit devices (IEC 60947-5-1:1997) 3 Identification of relays Two types are identified in EN 50216-3 which shall meet the following functions: Table 1 Identification of relays Function Relay type 1 Relay type 2 Gas and leakage detection 1 contact 1
27、contact Overpressure detection 1 contact 1 contact Over temperature detection 2 contacts (alarm/tripping) Temperature indicator Yes Yes Visual leakage control Yes Yes NOTE The two functions gas and leakage detection are usually actuated by one contact in common. Other types of relay having additiona
28、l functions to those defined in Table 1 are acceptable by agreement. 5 EN 50216-3:2002 4 Service conditions In addition to the service conditions specified in EN 50216-1, the relay shall meet the conditions detailed in this clause. Lower protection against environmental conditions may be agreed betw
29、een purchaser and supplier for indoor installation. 4.1 Maximum inclination The relay is intended to function in a vertical position. An inclination of up to 5 to the vertical axis shall be admissible in the direction of the liquid flow (mobile equipment, trailer.). Other values may be agreed betwee
30、n purchaser and supplier. 4.2 Operating pressure The maximum continuous operating pressure shall be 50 kPa. 4.3 Sensitivity of the relay contacts to magnetic fields The relay shall be able to withstand a d.c. magnetic field up to 25 mT in any direction and any polarity without inadvertent operation.
31、 NOTE During operation and in case of faults, the surroundings of the transformers or reactors are subjected to magnetic fields which could produce inadvertent operation of the relays equipped with magnetic contacts (reed type). 5 Outline and mounting details See Figures 1 to 4. 6 Operational perfor
32、mance 6.1 General Contacts shall be potential free. Materials of the protective relay shall be heat resistant at 115 C. This relay shall also permit partial refilling of liquid of transformer. The level of the liquid shall be visible. 6.2 Gas collection 6.3 Leakage detection 6.4 Pressure detection T
33、he pressure detecting device shall operate at a pressure of 50 kPa or according to transformer or reactor manufacturers requirement. #The alarm contact shall operate due to a gas displacement (volume of gas collected) between 100 cm and 200 cm.$ #The alarm contact shall operate if the oil level in t
34、he relay drops by the same volume as for gas collection.$ EN 50216-3:2002 6 6.5 Temperature detection (for relay type 2) The relay shall be equipped with two adjustable contacts for the range from 30 C to 120 C or to 150 C. Accuracy for the temperature releasing alarm or tripping maximum temperature
35、 range. This accuracy shall be fulfilled over the whole range. 6.6 Temperature indicator NOTE This device should not operate when the transformer is submitted to a short circuit test performed in accordance with EN 60076-5. 7 Electrical characteristics of switch This device is based on EN 60947-5-1.
36、 7.1 Rated currents The rated current shall be 2 A r.m.s. with the short time current 10 A r.m.s. for 30 ms. 7.2 Breaking and making capacity 7.3 Operation time During operation, the contacts shall operate within 0,5 s maximum. 8 Mechanical requirements 8.1 Terminal box A terminal box shall be provi
37、ded with three terminals for each function and one earth terminal. The thread of the earth terminal should be M4 or larger. The earth terminal shall be clearly marked. The terminals shall be designed to accept cables having a cross sectional area between 1,5 mm and 2,5 mm. It shall be possible to fi
38、t this cable box with two cable glands Pg 21. The terminal box cover shall be to class IP 55 in accordance with EN 60529 and equipped with sealable unremovable fastening. # shall be 3 % of the $#The temperature indicator range shall be from -30 C to +120 C or 150 C. Restorable maximum pointer is opt
39、ional upon demand.$ #Table 2 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 contact life shall
40、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. $ 7 EN 50216-3:2002 Mechanical impact protection shall be to class IK 07 in
41、 accordance with EN 50102. 8.2 Testing facilities Checking of the contact operation for all the functions shall be possible without the contacts or their operating mechanism being damaged. 8.3 Gas sampling The relay shall be equipped with an easily accessible sampling petcock. The sampling petcock s
42、hall not leak. A facility shall be allowed for the connection of 3,17 mm (1/8) tubing and it shall be possible to seal it to prevent inadvertent opening. 8.4 Presence of gas in the relay It shall be possible to visually check the presence of any gas from at least three sides. 9 Nameplate The namepla
43、te shall contain at least the following information: name of supplier; serial number, number of this standard and year of edition; type of relay; connection diagram; seismic withstand class. The type of relay shall allow identification of the relay characteristics from the operating and maintenance
44、manual supplied by the supplier. 10 Tests Reference to EN 60076-1 shall be made for definitions concerning testing. In addition to the tests specified in EN 50216-1, the following tests shall be carried out: 10.1 Routine tests 10.1.1 Oil leakage test The relay shall be subjected to an oil leakage te
45、st by application of 100 kPa of hot oil at 90 C for a period of 30 min. The relay shall not leak. 10.1.2 Operation test All the functions defined in clause 6 shall be checked. Gas detection and leakage detection shall be checked in the operating position. 10.2 Type tests 10.2.1 Determination of the
46、volume of gas or liquid sufficient to operate the contact at ambient temperature. EN 50216-3:2002 8 10.2.2 Operation of the relay with an inclination of 5 (unless otherwise agreed between purchaser and supplier) in comparison to all directions from the vertical direction. 10.2.3 Pressure test, 250 k
47、Pa for 2 min under oil at 115 C. NOTE Sensors, if any, may be removed during the test. After the test, no leakage and correct operation of the relay shall be observed. 10.2.4 Contacts magnetic field withstand test: the contacts shall not operate due to a magnetic field lower than the specified value
48、 (see 4.3). This figure shows preferred arrangements and typical dimensions. Figure 1 Outline and mounting details: general view Flange axis Sensor length Sealable screw 9 EN 50216-3:2002 Figure 2 Fixing detail Terminal marking in accordance with EN 50005 (Relay oil filled)Figure 3 Terminal box arra
49、ngement 97 + 2Figure 4 Cover detail BS EN 50216-3:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendme
