1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationRailway applications Mountedparts of the traction transformerand cooling systemPart 4: Gas and liquid actuated (Buchholz) relay for liquid immersed transformers and reactors with
2、 conservator for rail vehiclesDD CLC/TS 50537-4:2010National forewordThis Draft for Development is the UK implementation of CLC/TS 50537-4:2010.The UK participation in its preparation was entrusted by Technical CommitteeGEL/9, Railway Electrotechnical Applications, to Subcommittee GEL/9/2,Railway El
3、ectrotechnical Applications - Rolling stock.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2010ISBN 978 0 5
4、80 69509 4ICS 29.120.70; 29.180; 45.060.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This Draft for Development was published under the authority of theStandards Policy and Strategy Committee on 30 April 2010.Amendments issued since publicationAmd. No. Date Text
5、affectedBRITISH STANDARDDD CLC/TS 50537-4:2010TECHNICAL SPECIFICATION CLC/TS 50537-4 SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION February 2010 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische
6、Normung Central Secretariat: Avenue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. CLC/TS 50537-4:2010 E ICS 29.180; 45.060.10 English version Railway applications - Mounted parts of the traction tr
7、ansformer and cooling system - Part 4: Gas and liquid actuated (Buchholz) relay for liquid immersed transformers and reactors with conservator for rail vehicles Applications ferroviaires - Accessoires des transformateurs de traction et systmes de refroidissement - Partie 4: Relais de protection (Buc
8、hholz) pour transformateurs de matriel roulant ferroviaire Bahnanwendungen - Anbauteile des Haupttransformators und Khlsystems - Part 4: Buchholzrelais fr Transformatoren und Drosselspulen This Technical Specification was approved by CENELEC on 2010-01-22. CENELEC members are required to announce th
9、e existence of this TS in the same way as for an EN and to make the TS available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia,
10、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. DD CLC/TS 50537-4:2010CLC
11、/TS 50537-4:2010 - 2 - Foreword This Technical Specification was prepared by Working Group 25 of SC 9XB, Electromechanical material on board rolling stock, of Technical Committee CENELEC TC 9X, Electrical and electronic applications for railways. It was circulated for voting in accordance with the I
12、nternal Regulations, Part 2, Subclause 11.3.3.3 and was accepted as a CENELEC Technical Specification on 2010-01-22. 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
13、 or all such patent rights. The following date was fixed: latest date by which the existence of the CLC/TS has to be announced at national level (doa) 2010-07-22 The CLC/TS 50537 series “Railway applications Mounted parts of the traction transformer and cooling system” consists of four different par
14、ts: Part 1: HV bushing for traction transformers; Part 2: Pump for insulating liquid for traction transformers and reactors; Part 3: Water pump for traction converters; Part 4: Gas and liquid actuated (Buchholz) relay for liquid immersed transformers and reactors with conservator for rail vehicles.
15、The CLC/TS 50537 series shall be read in conjunction with CLC/TS 50534 1)“Railway applications - Generic system architectures for onboard electric auxiliary power systems”. This standardization project was derived from the EU-funded Research project MODTRAIN (MODPOWER). It is part of a series of sta
16、ndards, referring to each other. The hierarchy of the standards is intended to be as follows: 1)Under development. DD CLC/TS 50537-4:2010- 3 - CLC/TS 50537-4:2010 Overview on the technical frameworkCLC/TS 50534 defines the basis for other depending standardsCLC/TS 50534Railway applications - Generic
17、 system architectures for onboard electric auxiliary powers systemsCLC/TS 50535Railway applications - Onboard auxiliary power converter systemLevel 1: ArchitecturesEN 50533Three-phase train line voltage characteristicsEN 50546Shore (external) supply systems for rail vehiclesEN 50547Batteries for rai
18、l vehiclesCLC/TS 50537-1Part 1: HV bushing for traction transformersCLC/TS 50537-2Part 2: Pump for insulating liquid for traction transformers and reactorsCLC/TS 50537-3Part 3: Water pump for traction convertersCLC/TS 50537-4Part 4: Gas and liquid actuated (Buchholz) relay for liquid immersed transf
19、ormers and reactors with conservator for rail vehiclesLevel 2: Systems, InterfacesLevel 3: ComponentsMounted parts of the traction transformer and cooling systemDD CLC/TS 50537-4:2010CLC/TS 50537-4:2010 - 4 - Contents 1 Scope . 6 2 Normative references. 6 3 Terms, definitions and abbreviations 7 3.1
20、 Terms and definitions . 7 3.2 Abbreviations . 7 4 Service conditions . 7 4.1 General 7 4.2 Environmental conditions . 7 4.3 Cooling liquid 8 4.4 Shock and vibration . 8 4.5 Storage and transportation conditions . 8 4.6 Maximum inclination 8 4.7 Operating pressure 8 4.8 Sensitivity of the relay cont
21、acts to magnetic fields 8 5 Operational performance 8 5.1 Alarm and tripping contact . 8 5.2 Liquid loss from the tank 9 5.3 Latching of trip contact . 9 6 Electrical requirements . 9 6.1 Switch type . 9 6.2 Rated current . 9 6.3 Breaking and making capacity . 9 7 Mechanical requirements 10 7.1 Main
22、 dimensions 10 7.2 Pipe connection11 7.3 Terminal box 11 7.4 Testing equipment .11 7.5 Gas sampling .11 7.6 Presence of gas in the relay 11 7.7 Mounting instruction .11 8 Reliability and lifetime .12 9 Material 12 10 Markings 12 11 Documentation .12 12 Testing .13 12.1 General 13 12.2 List of tests
23、.14 12.3 Description of tests 14 Bibliography 15 DD CLC/TS 50537-4:2010- 5 - CLC/TS 50537-4:2010 Figures Figure 1 Main dimensions of the Buchholz relay . 10 Tables Table 1 Breaking capacity 9 Table 2 Maximum mechanical dimensions 10 Table 3 Minimum clearance for installation, accessibility and gas s
24、ampling . 10 Table 4 Mandatory clearance for maintenance and interchangeability 11 Table 5 List of tests 14 DD CLC/TS 50537-4:2010CLC/TS 50537-4:2010 - 6 - 1 Scope This Technical Specification covers gas and liquid actuated (Buchholz) relays for liquid immersed transformers and reactors with conserv
25、ator for rail vehicles. The device is intended to detect gas release from the unit to be protected, cooling liquid surge from the protected unit to the conservator, complete loss of the cooling liquid in the conservator. This Technical Specification gives consideration to both technical and normativ
26、e requirements of the railway environment and restricts the variety in particular provided by the industry-wide standard EN 50216-2. It determines requirements and tests enabling the interchangeability of Buchholz relays by defining the following types of interfaces: mechanical interface, e.g. flang
27、es for pipe connection, dimensions; electrical interface, e.g. supply voltage for making and breaking capability; functional interface, e.g. protective operational behaviour. It is not applicable to flameproof relays. Different liquids may be used, which are typically used for both cooling and insul
28、ating. Furthermore, operating conditions are described. 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 (inclu
29、ding any amendments) applies. CLC/TS 50534 2)Railway applications Generic system architecture for onboard electric auxiliary power systems EN 50125-1:1999 Railway applications Environmental conditions for equipment Part 1: Equipment on board rolling stock EN 50216-2:2002 + A1:2002 Power transformer
30、and reactor fittings Part 2: Gas and oil actuated relay for liquid immersed transformers and reactors with conservator EN 50547 2)Railway applications Batteries for rail vehicles EN 60529:1991 + A1:2000 Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989 + A1:1999) EN 60721-3-5:19
31、97 Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Section 5: Ground vehicle installations (IEC 60721-3-5:1997) EN 60947-5-1:2004 + A1:2009 Low-voltage switchgear and controlgear Part 5-1: Control circuit devices and switch
32、ing elements Electromechanical control circuit devices (IEC 60947-5-1:2003 + A1:2009) EN 61373:1999 Railway applications Rolling stock equipment Shock and vibration tests (IEC 61373:1999) EN ISO 228-1:2003 Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, toler
33、ances and designation (ISO 228-1:2000) 2)Under development. DD CLC/TS 50537-4:2010- 7 - CLC/TS 50537-4:2010 3 Terms, definitions and Abbreviations For the purposes of this document, the following terms and definitions apply. 3.1 Terms and definitions 3.1.1 normal operating conditions conditions that
34、 usually occur during “real” operation 3.2 Abbreviations For the purposes of this document, the following abbreviation applies. MTBF Mean Time Between Failures 4 Service conditions 4.1 General The operation of the Buchholz relay may be affected by the conditions that occur under normal train service
35、 conditions, e.g. corrosive gases, carbon dust and other matter from brake shoes and pads or vibration stress. Among all service conditions described in this clause, malfunction of the Buchholz relay shall not occur. 4.2 Environmental conditions The Buchholz relay shall ensure appropriate functionin
36、g at the given requirements: Temperature range: Ambient temperature: Transport and storage: -30 C . 80 C Other values, e.g. -40 C or -50 C shall be agreed between customer and manufacturer. -30 C . 80 C Altitude: up to 1 400 m (EN 50125-1:1999, class A1) Humidity: 0 % . 100 % Humidity Climate class:
37、 EN 60721-3-5:1997, 5K2 Biological classification: EN 60721-3-5:1997, 5B3 Chemical classification: EN 60721-3-5:1997, 5C3 Contamination: EN 60721-3-5:1997, 5F3 Mechanical-active matters: EN 60721-3-5:1997, 5S3 Rain: EN 60721-3-5:1997, 5K3 Solar radiation: EN 60721-3-5:1997, 5K3 DD CLC/TS 50537-4:201
38、0CLC/TS 50537-4:2010 - 8 - 4.3 Cooling liquid Different liquids may be used within the transformer, which are typically used for cooling as well as insulating. Generally, the Buchholz relay shall be able to operate with oil, ester and silicon (including chemical matters). The maximum temperature of
39、the cooling liquid is 135 C for thermal steady state. Other values shall be agreed between manufacturer and customer. Sealings can be chosen depending on actual service condition and cooling liquid. 4.4 Shock and vibration The Buchholz relay shall be able to withstand shocks and vibrations as stated
40、 in EN 61373. See also 12.3.2. 4.5 Storage and transportation conditions To protect the relay, covers at the openings shall be provided. The relay shall be placed in transport safe boxes. 4.6 Maximum inclination The Buchholz relay is designed for operation in horizontal orientation. During normal op
41、erating conditions the Buchholz relay shall be operated without limitations of its functionality at a maximum gradient of 10. This includes both static and dynamic effects. 4.7 Operating pressure The relay shall be able to operate at a continuous internal gauge pressure of 50 kPa and shall withstand
42、 an overpressure of 250 kPa for 2 min. 4.8 Sensitivity of the relay contacts to magnetic fields The relay shall be able to withstand a DC magnetic field up to 25 mT, in any direction and polarity without inadvertent operation. 5 Operational performance 5.1 Alarm and tripping contact This device cons
43、ists of two electric contacts. The alarm contact shall operate due to a gas displacement (volume of gas collected between 100 cm and 300 cm or 400 cm). Gas shall not freely pass from the relay body and escape into the pipework until the contact has operated. The trip contact shall operate at a stead
44、y cooling liquid flow of 0,65, 1 or 1,5 m/s and at a tolerance of 15 %. The cooling liquid flow shall be stated by agreement between the manufacturer and the customer. This operation shall not be adversely affected when the alarm contact has already closed and gas is escaping freely. The relay shall
45、 not release the alarm at a liquid flow from the conservator to transformers vessel nor in case of an external short circuit. The maximum delay time shall not exceed 0,5 s for the Buchholz relay itself. DD CLC/TS 50537-4:2010- 9 - CLC/TS 50537-4:2010 5.2 Liquid loss from the tank The alarm contact s
46、hall operate when the liquid level in the relay drops by the same volume as for gas collection. Further liquid loss shall cause the trip element to operate before the pipeline is free of liquid. 5.3 Latching of trip contact On the customers request, a device can be provided which holds the trip cont
47、act in the position after liquid flow operation until it is being reset. 6 Electrical requirements 6.1 General The electric characteristic of the switch shall be in accordance with EN 60947-5-1. 6.2 Switch type The customer shall specify whether the switch shall have normally open, normally closed o
48、r change over contacts (normally means that the relay is filled with liquid and without any fault on the protected equipment). 6.3 Rated current The rated current shall be 2 A r.m.s. and the short time current is defined by maximum 10 A r.m.s. for 30 ms. Other values shall be agreed between manufact
49、urer and customer. 6.4 Breaking and making capacity The breaking capacity shall be in accordance with Table 1. Table 1 Breaking capacity Voltage Current Breaking capacity 24 V DC to 220 V DC 2 A 440 W L / R 0,5 Other values may be agreed between manufacturer and customer. The preferred value and the characteristics of the supply voltage are defined in EN 50547. The switch shall also be able to make a low current down to 10 mA for any value of voltage defined
