1、Power transformer and reactorfittings Part 11: Oil and winding temperature indicatorsBS EN 50216-11:2008raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsNational forewordThis British Standard is the UK implementation of EN 50216-11
2、:2008.The UK participation in its preparation was entrusted to TechnicalCommittee PEL/14, Power transformers.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 provisionsof a contract. Users
3、are responsible for its correct application. BSI 200ISBN 978 0 580 64604 1ICS 29.180Compliance with a British Standard cannot confer immunity fromlegal obligations.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 50216-11:20089This British Standard was published un
4、der the authority of the StandardsPolicy and Strategy Committee on 31 January 2009. EUROPEAN STANDARD EN 50216-11 NORME EUROPENNE EUROPISCHE NORM September 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elek
5、trotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50216-11:2008 E ICS 29.180 English version Power transformer and reactor fittings - Part 11: Oil
6、 and winding temperature indicators Accessoires pour transformateurs de puissance et bobines dinductance - Partie 11: Indicateurs de temprature de lhuile et des enroulements Zubehr fr Transformatoren und Drosselspulen - Teil 11: l- und Wicklungstemperaturanzeiger This European Standard was approved
7、by CENELEC on 2008-07-01. CENELEC members are bound 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
8、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
9、 notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lit
10、huania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 50216-11:2008EN 50216-11:2008 - 2 - Foreword This European Standard has been prepared by the Technical Committee CENELEC TC 14, Power transforme
11、rs. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50216-11 on 2008-07-01 This EN 50216-11 is to be read in conjunction with EN 50216-1:2002, Power transformer and reactor fittings - Part 1: General. The following dates were fixed: latest dat
12、e by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2009-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-07-01 _ BS EN 50216-11:2008- 3 - EN 50216-11:2008 Contents
13、 1 Scope . 4 2 Normative references. 4 3 Direct reading mechanical dial type oil and winding temperature indicators . 4 3.1 General . 4 3.2 Mechanical requirements 5 3.3 Mechanical protection degree . 5 3.4 Terminal box . 5 4 Sensing bulb and capillary 5 5 Measuring accuracy . 5 6 Electric contacts
14、. 6 6.1 Number and type of contacts 6 6.2 Breaking and making capacity 6 7 Heating system on WTI 6 8 Special requirements . 7 9 Tests 7 9.1 Routine tests . 6 9.2 Type tests 7 Tables Table 1 Breaking and making capacity 6 BS EN 50216-11:2008EN 50216-11:2008 - 4 - 1 Scope EN 50216-11 covers oil temper
15、ature and winding temperature (thermal image) indicators of the interchangeable mechanical (not electronic) type with contacts for use with liquid immersed power transformers and reactors for indoor or outdoor installation. This standard defines the characteristics of the instruments in order to ens
16、ure the interchangeability achieving the same performance. Except where otherwise specified or implied herein, oil and winding temperature indicators shall comply with the requirements of EN 50216-1. 2 Normative references The following referenced documents are indispensable for the application of t
17、his document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 50216-1:2002 Power transformer and reactor fittings - Part 1: General EN 50216-4:2002 Power transformer and reactor fitting
18、s - Part 4: Basic accessories (earthing terminal, drain and filling devices, thermometer pocket, wheel assembly) EN 60255-21-1 Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment - Section 1: Vibration tests (sinusoidal) (IEC 60255-21-1)
19、 EN 60255-21-2 Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment - Section 2: Shock and bump tests(IEC 60255-21-2) EN 60255-21-3 Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection e
20、quipment - Section 3: Seismic tests (IEC 60255-21-3) EN 60529 Degrees of protection provided by enclosures (IP Code) (IEC 60529) 3 Direct reading mechanical dial type oil and winding temperature indicators The oil and winding temperature indicators must be of the mechanical dial type. Winding temper
21、ature indicator must be only thermal image principle. 3.1 General Nominal diameter (or equivalent size in case of non circular dial): ND = 150 mm (-10/+20) mm, for oil and winding temperature indicators. For a good readability it is recommended that the scale diameter is minimum 130 mm for all. The
22、choice of the colours of the background, letters and pointer should guarantee good readability; for example: white background with black letters, black background with white letters. The marking shall be 2 C or 5 C. Marking of the dial plate shall be indelible and protected with UV stabilised polyca
23、rbonate or safety glass with UV filter. BS EN 50216-11:2008- 5 - EN 50216-11:2008 Standard measuring ranges: -20 C /+130 C or -20 C/+140 C for oil temperature indicators; 0 C/+150C or 0 C /+160 C for winding temperature indicators. Special temperature ranges may be supplied by agreement between manu
24、facturer and purchaser. Temperature indicating arrow to be black colour or white colour depending on background. The temperature indicator must be equipped with a maximum indicating pointer of red colour with a suitable reset knob. 3.2 Mechanical requirements Housing and all exterior parts shall wit
25、hstand either because of their own properties or because of an adequate treatment to the environmental conditions, seismic and operational vibrations in accordance with EN 50216-1. The case must be provided with an air hole or a breathing system for ventilation. 3.3 Mechanical protection degree The
26、degree of protection shall be minimum IP54 in accordance with EN 50216-1. 3.4 Terminal box A terminal box or equivalent solution shall be provided with three terminals for each contact and one earth terminal. The terminals shall be designed to accept cables having a cross section between 1,5 mm and
27、4 mm. All the terminals, the earth terminal included, shall be clearly marked. A suitable label or marking must indicate the general electrical performances and function. The terminal box must have two or more entry for cables suitable to accept M20 x 1,5 or M25 x 1,5 cable glands. 4 Sensing bulb an
28、d capillary Capillary tube: the standard values of capillary length are 6 m and 10 m. Other lengths by agreement between customer and purchaser. Capillary tube shall be adequately armoured in order to avoid accidental damages which can be prejudicial to a correct indication of the instrument. Sensin
29、g bulb shall be suitable to be accepted inside pocket specified in EN 50216-4, 4.2. 5 Measuring accuracy Measuring accuracy must be 1,5 % of full scale value. The accuracy shall be compensated over the ambient temperature range of -25C to + 40 C. By agreement between purchaser and supplier the devic
30、e can be supplied with accuracy of 1 % of full scale value. BS EN 50216-11:2008EN 50216-11:2008 - 6 - 6 Electric contacts 6.1 Number and type of contacts Number of contacts: standard configuration is with 2 or 4 contacts; other contacts configuration (i.e. 3 or 5 or 6 contacts or more to be consider
31、ed as special executions, subject to agreement between manufacturer and purchaser). Electric contacts used on the temperature indicators must be microswitches change-over type. Contact setting shall be adjustable over the whole range. Commutation tolerance: 2 % of full scale value. Commutation diffe
32、rential: recommended 3 % to 7 % of full scale value. In any case contacts shall not contain mercury. 6.2 Breaking and making capacity Table 1 Breaking and making capacity 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,
33、5 230 V a.c. (common requirement) 5 A 5 A cos 0,5 Other values (i.e. 10 A breaking capacity at 230 V a.c.) may be agreed between purchaser and supplier. The minimum contact life shall be 10 000 operations. Only in the case where the equipment has the special specified requirement that the device has
34、 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 Heating system on WTI The winding temperature indicator (thermal image) must be equipped with a heating system able to simulat
35、e the over temperatures in the transformer windings above oil temperature. Said heating system shall typically consist of a heating resistance and a trimming system for gradient adjustment. The standard temperature gradient must be adjustable up to 35 C. The winding temperature indicator must be sui
36、table to work connected with a current transformer with nominal output 2 A. Upon request, by agreement between customer and manufacturer, the indicator can be supplied with a heating system suitable for a current transformer output of 1 A, 1,5 A, 5 A. The maximum power absorbed by the heating system
37、 is 20 VA. BS EN 50216-11:2008- 7 - EN 50216-11:2008 8 Special requirements Upon request the temperature indicators may be fit with one or more outputs (type Pt100 or transmitters 4 mA - 20 mA) for remote indication or connection to SCADA system. 9 Tests 9.1 Routine tests The following tests must be
38、 carried out on 100 % of instruments. Evidence of the measuring and commutation tests must be filed: dimensional test; leakage test; measuring tolerance test; commutation tolerance test; overheating or overpressure test; insulation test (2 kV between contact and earth); heating system functionality
39、test (for thermal image only); analog/digital output functionality test (only in case of presence of analog or digital outputs). 9.2 Type tests dimensional test; measuring tolerance test; commutation tolerance test; overheating or overpressure test; insulation test; heating system functionality test
40、 (for thermal image only); corrosion test; degree of protection test (verification of IP in accordance with EN 60529); verification of special mechanical conditions (vibration fatigue test, EN 60255-21-1, shock test, EN 60255-21-2 and earthquake test, EN 60255-21-3); electrical performances test in
41、accordance with the EMC standards; ambient temperature tests (functional). BS EN 50216-11:2008This page deliberately left blankThis page deliberately left blankBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the
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