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Edition 1:1996 consolidée par les amendements 1:2000 et 2:2002 Edition 1:1996 consolidated with amendments 1:2000 and 2:2002

Transformateurs de mesure   Partie 1: Transformateurs de courant Instrument transformers   Part 1: Current transformers

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Transformateurs de mesure   Partie 1: Transformateurs de courant Instrument transformers   Part 1: Current transformers

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êð ðì ðì ìó ìó ï w ×Û ×ÛÝ æï æï çç ççê õß õßï æî æî ðð ðð ðõ ðõ ßî ßîæ îð îðð î

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êð ðì ðì ìó ìó ï w ×Û ×ÛÝ æï æï çç ççê õß õßï æî æî ðð ðð ðõ ðõ ßî ßîæ îð îðð î

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IEC 60255 - 21-3

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IEC 62271-200 CELDAS MT.pdf

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of 57

 

êð ðì ðì ìó ìó ï w ×Û ×ÛÝ æï æï çç ççê õß õßï æî æî ðð ðð ðõ ðõ ßî ßîæ îð îðð î

18678589IEC-60044-1

IEC 60255 - 21-3

 Search document

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 ß²²» ¨ ß ø²± ®³¿ ¬·ª»÷ ¬·ª» ÷ Ю±¬»½¬ Ю± ¬»½¬ ·ª» ½«®®»² ½«® ®»²¬¬ ¬® ¿²-º ±®³ »®- òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòïðí òò ïðí  ß²²» ¨ Þ ø·²º±® ø·² º±® ³¿¬·ª»÷ ³¿¬ ·ª»÷ Ó«´¬·°´» Ó«´¬ ·°´» ½¸±°°»¼ ½¸± °°»¼ ·³°«´·³° «´-» » ¬» -¬ò òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòòò òòïïï òò ïïï Ú·¹«®» ï Š ß´¬·¬«¼» ½ ±®®»½¬·±² º¿½¬±®- òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòèç òòòòèç Ú·¹«®» î Š Ì»-¬ ½·®½«·¬ º±® °¿®¬·¿´ ¼·-½¸¿®¹» ³»¿-«®»³ »²¬ òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòçï òòòòòòòçï Ú·¹«®» í Š ß´¬»®²¿¬·ª» ¬»-¬ ½·®½«·¬ º±® °¿®¬·¿´ ¼·-½¸¿®¹» ³»¿-«®»³»²¬ òòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòçï òòòòòòòòçï Ú·¹«®» ì Š Û¨¿³°´» ±º ¾¿´¿²½»¼ ¬»-¬ ½·®½«·¬ º±® °¿®¬·¿´ ¼·-½¸¿®¹» ³»¿-«®»³»²¬ òòòòòòòòòòòòòòòòòòòòòòçí òòòòòòòòòòòòòòòòòòòòòòçí Ú·¹«®» ë Š Û¨¿³°´» ±º ½¿´·¾®¿¬·±² ½·®½«·¬ º±® °¿®¬·¿´ ¼·-½¸¿®¹» ³»¿-«®»³»²¬ òòòòòòòòòòòòòòòòòòòòòòòòòòòçí òòòòòòòòòòòòòòòòòòòòòòòòòòòçí Ú·¹«®» ê Š Ó»¿-«®·²¹ ½·®½«·¬òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò ½·®½«·¬òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòçë çë Ú·¹«®» é Š Ì®¿²-³·¬¬»¼ Ѫ»®ª±´¬¿¹»- ³»¿-«®»³»²¬æ Ì»-¬ Ý·®½«·¬ ¿²¼ Ù×Í Ì»-¬ -»¬ó«° òòòòòòòòòòòòç Ú·¹«®» è Š Ì®¿²-³·¬¬»¼ Ѫ»®ª±´¬¿¹»- ³»¿-«®»³»²¬æ Ù»²»®¿´ Ì»-¬ -»¬ó«° òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòçç çç Ú·¹«®» ç Š Ì®¿²-³·¬¬»¼ Ѫ»®ª±´¬¿¹»- ³»¿-«®»³»²¬æ Ì»-¬ É¿ª»º±®³- òòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòïðï òòòòïðï Ú·¹«®»- ßòï ¬± ßòêòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò ßòêòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòïðç òòïðç Ì¿¾´» ï Š Ì»³ °»®¿¬«®» ½¿¬»¹±®·»- òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòîé òòòòòòòîé Ì¿¾´» î Š Ô·³·¬- ±º ¬»³ °»®¿¬«®» ®·-» ±º ¬¸» ©·²¼·²¹-òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò ©·²¼·²¹-òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòíí òòòíí Ì¿¾´» í Š כּ¼ ·²-«´¿¬·±² ´»ª»´- º ±® ¬®¿²-º±®³»® °®·³ ¿®§ ©·²¼·²¹- ¸¿ª·²¹ ¸·¹¸»-¬ ª±´¬¿¹» º±® »¯«·°³»²¬ U  »¯«·°³»²¬ U ³ ä íðð µÊòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò µÊòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòíé òòòòòòòòòòòòòòòíé Ì¿¾´» ì Š כּ¼ ·²-«´¿¬·±² ´»ª»´- º ±® ¬®¿²-º±®³»® °®·³ ¿®§ ©·²¼·²¹- ¸¿ª·²¹ ¸·¹¸»-¬ ª±´¬¿¹» º±® »¯«·°³»²¬ U  »¯«·°³»²¬ U ³ íðð µÊòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò µÊòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòíé òòòòòòòòòòíé Ì¿¾´» ë Š б©»® º ®»¯«»²½§ ©·¬¸-¬¿²¼ ª±´¬¿¹»- º±® ¬®¿²-º±®³»® °®·³¿®§ ©·²¼·²¹- ¸¿ª·²¹ ¸·¹¸»-¬ ª±´¬¿¹» º±® »¯«·°³»²¬ U  »¯«·°³»²¬  U ³ íðð µÊòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò µÊòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòíç òòòòíç Ì¿¾´» ê Š ﮬ·¿´ ¼·-½¸¿®¹» ¬»-¬ ª±´¬¿¹»- ¿²¼ °»®³·--·¾´» ´»ª»´- òòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòíç òíç Ì¿¾´» é Š Ý®»»°¿¹» ¼·-¬¿²½»- òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòìí òòòòòòòòòòòìí Ì¿¾´» è Š ͬ¿¬·½ ©·¬¸-¬¿²¼ ¬»-¬ ´±¿¼- òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòìë òìë Ì¿¾´» ç Š Ó±¼¿´·¬·»- ±º ¿°°´·½¿¬·±² ±º ¬»-¬ ´±¿¼- ¬± ¾» ¿°°´·»¼ ¬± ¬¸» °®·³¿®§ ¬»®³·²¿´- òòòòòòòòòòòêí Ì¿¾´» ïð Š Ó¿®µ ·²¹- ±º ¬»®³·²¿´- òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòêé òòòòòòòòêé Ì¿¾´» ïï Š Ô·³·¬- ±º ½«®®»²¬ »®®±® ¿²¼ °¸¿-» ¼·-°´¿½»³»²¬ º±® ³»¿-«®·²¹ ½«®®»²¬ ¬®¿²-º±®³»®- ø½´¿--»- º®±³ ðòï ¬± ï÷ òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòéï  òòòòéï

up to vote on this title Ì¿¾´» ïî Š Ô·³·¬- ±º ½«®®»²¬ »®®±® ¿²¼ °¸¿-» ¼·-°´¿½»³»²¬Sign º±® ³»¿-«®·²¹ ½«®®»²¬ ¬®¿²-º±®³»®- º±® -°»½·¿´ ¿°°´·½¿¬·±² òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòéí òòòòòòòòòéí  Usefulòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò  Not useful Ì¿¾´» ïí Š Ô·³·¬- ±º ½«®®»²¬ »®®±® º±® ³»¿-«®·²¹ ½«®®»²¬ ¬®¿²-º±®³»®- ø½´¿--»- í ¿²¼ ë÷ òòòòòòòòòéí Ì¿¾´» ïì Š Ô·³·¬- ±º »®®±® º±® °®±¬»½¬·ª» ½«®®»²¬ ¬®¿²-º±®³»®- òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòò òòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòòéé òòòòòòòòòòòòòòòòéé

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60044-1 © IEC:1996+A1:2000+A2:2002

18678589IEC-60044-1

IEC 60255 - 21-3

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INTERNATIONAL ELECTROTECHNICAL COMMISSION  ____________

INSTRUMENT TRANSFORMERS   Part 1: Current transformers

FOREWORD 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested National Committees. 3) The documents produced have the form of recommendations for international use and are published in the form of standards, technical specifications, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. Unlock full access with a free trial.

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5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards.

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6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 60044-1 has been prepared by IEC technical committee 38: Instrument transformers. This consolidated version of IEC 60044-1 consists of the first edition (1996) [documents [documents 38/161/FDIS and 38/174/RVD, its amendment 1 (2000) [documents 38/245/FDIS  and Sign up to vote on this title 38/257/RVD] and its amendment 2 ( 2002) [documents 38/285/FDIS and 38/289/RVD].

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The technical content is therefore identical to the base edition and its amendments and has been prepared for user convenience.

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

18678589IEC-60044-1

IEC 60255 - 21-3

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INSTRUMENT TRANSFORMERS   Part 1: Current transformers

1 1.1

General Scope

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Ú±® ½»®¬¿·² °®±¬»½¬·ª» -§-¬»³-ô ©¸»®» ¬¸» ½«®®»²¬ ¬®¿²-º±®³»® ½¸¿®¿½¬»®·-¬·½- ¿®» ¼»°»²¼¿²¬ ±² Unlock full access with a free trial. ¬¸» ±ª»®¿´´ ¼»-·¹² ±º ¬¸» °®±¬»½¬·ª» »¯«·°³»²¬ øº±® »¨¿³°´» ¸·¹¸ó-°»»¼ ¾¿´¿²½»¼ -§-¬»³- ¿²¼ »¿®¬¸óº¿«´¬ °®±¬»½¬·±² ·² ®»-±²¿²¬ »¿®¬¸»¼ ²»¬©±®µ-÷ô ¿¼¼·¬·±²¿´ ®»¯«·®»³»²¬- ¿®» ¹·ª»² ·² ½´¿«-» ïí º±® ½´¿-- ÐÎ ¬®¿²-º±®³»®- ¿²¼ ·² ½´¿«-» ïì º±® ½ ´¿-- ÐÈ ¬®¿²-º±®³»®-ò

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Ý´¿«-» ïí ½±ª»®- ¬¸» ®»¯«·®»³»²¬- ¿²¼ ¬»-¬- ·² ¿¼¼·¬·±² ¬± ¬¸±-» ·² ½´¿«-»- í ¬± ï𠬸¿¬ ¿®» ²»½»--¿®§ º±® ½«®®»²¬ ¬®¿²-º±®³»®- º±® «-» ©·¬¸ »´»½¬®·½¿´ °®±¬»½¬·ª» ®»´¿§-ô ¿²¼ ·² °¿®¬·½«´¿® º±®  º±®³- ±º °®±¬»½¬·±² ·² ©¸·½¸ ¬¸» °®·³» ®»¯«·®»³»²¬ ·- ¬¸» ¿¾-»²½» ±º ®»³ ¿²»²¬ º´«¨ò Ý´¿«-» ïì ½±ª»®- ¬¸» ®»¯«·®»³»²¬- ¿²¼ ¬»-¬- ·² ¿¼¼·¬·±² ¬± ¬¸±-» ·² ½´¿«-»- í ¬± ï𠬸¿¬ ¿®»  ²»½»--¿®§ º±® ½«®®»²¬ ¬®¿²-º±®³»®- º±® «-» ©·¬¸ »´»½¬®·½¿´ °®±¬»½¬·ª» ®»´¿§-ô ¿²¼ ·² °¿®¬·½«´¿® º±®  Sign up to vote on this title º±®³- ±º °®±¬»½¬·±² º±® ©¸·½¸ µ²±©´»¼¹» ±º ¬¸» ¬®¿²-º±®³»®Ž- -»½±²¼¿®§ »¨½·¬¿¬·±² Useful®»-·-¬¿²½» ½¸¿®¿½¬»®·-¬·½ô -»½±²¼¿®§ ©·²¼·²¹ ®»-·-¬¿²½»ô -»½±²¼¿®§ ¾«®¼»² ¿²¼ ¬«®²- ®¿¬·± · Not useful -«ºº·½·»²¬ ¬± ¿--»-- ·¬- °»®º±®³¿²½» ·² ®»´¿¬·±² ¬± ¬¸» °®±¬»½¬·ª» ®»´¿§ -§-¬»³ ©·¬¸ ©¸·½¸ ·¬ ·- ¬± ¾» «-»¼ò

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IEC 62271-200 CELDAS MT.pdf

of 57

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

18678589IEC-60044-1

IEC 60255 - 21-3

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×ÛÝ êððëðøíîï÷æïçèêô International Electrotechnical Vocabulary transformers

  Chapter 321: Instrument 

 

×ÛÝ êððêðóïæïçèçô High-voltage test techniques   Part 1: General definitions and test requirements ×ÛÝ êððéïóïæïççíô Insulation co-ordination   Part 1: Definitions, principles and rules ×ÛÝ êððèëæïçèìô Thermal evaluation and classification of electrical insulation ó ó À    ô À    ô   ô   ô À    ô À    ô   ô   ô À    ô À    ô À  À    ô   ô   ô   ô À    ô À  À  À    ô À    ô ó À  ó À    ô   ô À    ô   ô À    ô À    ô   ô À  ó ó ó

×ÛÝ êðïîïæïçêðô Recommendation for commercial annealed aluminium electrical conductor  wire ×ÛÝ êðîéðæïçèïô Partial discharge measurements ×ÛÝ êðëêéæïççîô Guide for the sampling of gases and of oil from oil-filled electrical equipment  and for the analysis of free and dissolved gases ×ÛÝ êðëççæïçéèô Interpretation of the analysis of gases in transformers and other oil-filled  electrical equipment in service ×ÛÝ êðéîïæ Classification of environmental conditions ×ÛÝ êðèïëæïçèêô Guide for the selection of insulators in respect of polluted conditions Ý×ÍÐÎ ïèóîæïçèêô Radio interference characteristics of overhead power lines and high-voltage You're Reading a Preview equipment   Part 2: Methods of measurement and proc edure for determining limits

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2

Definitions

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2.1.1 instrument transformer  ¿ ¬®¿²-º±®³»® ·²¬»²¼»¼ ¬± -«°°´§ ³»¿-«®·²¹ ·²-¬®«³»²¬-ô ³»¬»®-ô ®»´¿§- ¿²¼ ±¬¸»® -·³·´¿®  ¿°°¿ó ®¿¬«Sign up to vote on this title Å×ÛÊ íîïóðïóðï ³±¼·º·»¼Ã  Useful  Not useful 2.1.2 current transformer 

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

18678589IEC-60044-1

IEC 60255 - 21-3

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Š ïë Š

2.1.5 secondary circuit ¬¸» »¨¬»®²¿´ ½·®½«·¬ -«°°´·»¼ ¾§ ¬¸» -»½±²¼¿®§ ©·²¼·²¹ ±º ¿ ¬®¿²-º±® ³»®  2.1.6 rated primary current ¬¸» ª¿´«» ±º ¬¸» °®·³¿®§ ½«®®»²¬ ±² ©¸·½¸ ¬¸» °»®º±®³¿²½» ±º ¬¸» ¬®¿²-º±®³»® ·- ¾¿-»¼ Å×ÛÊ íîïóðïóïï ³±¼·º·»¼Ã 2.1.7 rated secondary current ¬¸» ª¿´«» ±º ¬¸» -»½±²¼¿®§ ½«®®»²¬ ±² ©¸·½¸ ¬¸» °»®º±®³¿²½» ±º ¬¸» ¬®¿²-º±®³»® ·- ¾¿-»¼ Å×ÛÊ íîïóðïóïë ³±¼·º·»¼Ã 2.1.8 actual transformation ratio ¬¸» ®¿¬·± ±º ¬¸» ¿½¬«¿´ °® ·³¿®§ ½«®®»²¬ ¬± ¬¸» ¿½¬«¿´ -»½±²¼¿®§ ½«®®»²¬ Å×ÛÊ íîïóðïóïé ³±¼·º·»¼Ã 2.1.9 rated transformation ratio ¬¸» ®¿¬·± ±º ¬¸» ®¿¬»¼ °®·³¿®§ ½«®®»²¬ ¬± ¬¸» ®¿¬»¼ -»½±²¼¿®§ ½«®®»²¬ Å×ÛÊ íîïóðïóïç ³±¼·º·»¼Ã 2.1.10 You're Reading a Preview current error (ratio error) ¬¸» »®®±® ©¸·½¸ ¿ ¬®¿²-º±®³»® ·²¬®±¼«½»- ·²¬± ¬¸» ³»¿-«®»³»²¬ ±º ¿ ½«®®»²¬ ¿²¼ ©¸·½¸ ¿®·-»Unlock full access with free trial. º®±³ ¬¸» º¿½¬ ¬¸¿¬ ¬¸» ¿½¬«¿´ ¬®¿²-º±®³¿¬·±² ®¿¬·± ·²±¬a »¯«¿´ ¬± ¬¸» ®¿¬»¼ ¬®¿²-º±®³¿¬·±² ® ¿¬·± ×ÛÊ íîïóðïóîï ³±¼·º·»¼Ã

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2.1.11 phase displacement

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

18678589IEC-60044-1

IEC 60255 - 21-3

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Š ïé Š

2.1.13 burden ¬¸» ·³°»¼¿²½» ±º ¬¸» -»½±²¼¿®§ ½·®½«·¬ ·² ±¸³- ¿²¼ °±©»®óº¿½¬±®  ̸» ¾«®¼»² ·- «-«¿´´§ »¨°®»--»¼ ¿- ¬¸» ¿°°¿®»²¬ °±©»® ·² ª±´¬¿³°»®»- ¿¾-±®¾»¼ ¿¬ ¿ -°»½·º·»¼ °±©»®óº¿½¬±® ¿²¼ ¿¬ ¬¸» ®¿¬»¼ -»½±²¼¿®§ ½«®®»²¬ò 2.1.14 rated burden ¬¸» ª¿´«» ±º ¬¸» ¾«®¼»² ±² ©¸·½¸ ¬¸» ¿½½«®¿½§ ®»¯«·®»³»²¬- ±º ¬¸·- -°»½·º·½¿¬·±² ¿®» ¾¿-»¼ 2.1.15 rated output ¬¸» ª¿´«» ±º ¬¸» ¿°°¿®»²¬ °±©»® ø·² ª±´¬¿³°»®»- ¿¬ ¿ -°»½·º·»¼ °±©»®óº¿½¬±®÷ ©¸·½¸ ¬¸» ¬®¿²-ó º±®³»® ·- ·²¬»²¼»¼ ¬± -«°°´§ ¬± ¬¸» -»½±²¼¿®§ ½·®½«·¬ ¿¬ ¬¸» ®¿¬»¼ -»½±²¼¿®§ ½«®®»²¬ ¿²¼ ©·¬¸ ®¿¬»¼ ¾«®¼»² ½±²²»½¬»¼ ¬± ·¬ 2.1.16 highest voltage for equipment ¬¸» ¸·¹¸»-¬ ®ò³ò-ò °¸¿-»ó¬±ó°¸¿-» ª±´¬¿¹» º±® ©¸·½¸ ¿ ¬®¿²-º±®³»® ·- ¼»-·¹²»¼ ·² ®»-°»½¬ ±º ·¬·²-«´¿¬·±² 2.1.17 highest voltage of a system ¸·¹¸»-¬ ª¿´«» ±º ±°»®¿¬·²¹ ª±´¬¿¹» ©¸·½¸ ±½½«®- «²¼»® ²±®³¿´ ±°»®¿¬·²¹ ½±²¼·¬·±²- ¿¬ ¿²§ ¬·³» ¿²¼ ¿¬ ¿²§ °±·²¬ ·² ¬¸» -§-¬»³

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2.1.18 rated insulation level Unlock full access with a free trial. ¬¸» ½±³¾·²¿¬·±² ±º ª±´¬¿¹» ª¿´«»- ©¸·½¸ ½¸¿®¿½¬»®·¦»- ¬¸» ·²-«´¿¬·±² ±º ¿ ¬®¿²-º±®³»® ©·¬¸ ®»¹¿®¼ ¬± ·¬- ½¿°¿¾·´·¬§ ¬± ©·¬¸-¬¿²¼ ¼·»´»½¬®·½ -¬®»--»-

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2.1.19 isolated neutral system ¿ -§-¬»³ ©¸»®» ¬¸» ²»«¬®¿´ °±·²¬ ·- ²±¬ ·²¬»²¬·±²¿´´§ ½±²²»½¬»¼ ¬± »¿®¬¸ô »¨½»°¬ º±® ¸·¹¸ ·³°»¼¿²½» ½±²²»½¬·±²- º±® °®±¬»½¬·±² ±® ³»¿-«®»³»²¬ °«®°±-»Å×ÛÊ êðïóðîóîìà 2.1.20 solidly earthed neutral system ¿ -§-¬»³ ©¸±-» ²»«¬®¿´ °±·²¬ø-÷ ·-ø¿®»÷ »¿® ¬¸»¼ ¼·®»½¬´§ Å×ÛÊ êðïóðîóîëà 2.1.21

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IEC 62271-200 CELDAS MT.pdf

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

ó ó À    ô À    ô   ô   ô À    ô À    ô   ô   ô À    ô À    ô À  À    ô   ô   ô   ô À    ô À  À  À    ô À    ô ó À  ó À    ô   ô À    ô   ô À    ô À    ô   ô À  ó ó ó

18678589IEC-60044-1

IEC 60255 - 21-3

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Š ïç Š

2.1.23 earth fault factor  ¿¬ ¿ ¹·ª»² ´±½¿¬·±² ±º ¿ ¬¸®»»ó°¸¿-» -§-¬»³ô ¿²¼ º±® ¿ ¹·ª»² -§-¬»³ ½±²º·¹«®¿¬·±²ô ¬¸» ®¿¬·± ±º  ¬¸» ¸·¹¸»-¬ ®ò³ò-ò °¸¿-»ó¬±ó»¿®¬¸ °±©»® º®»¯«»²½§ ª±´¬¿¹» ±² ¿ ¸»¿´¬¸§ °¸¿-» ¼«®·²¹ ¿ º¿«´¬ ¬± »¿®¬¸ ¿ºº»½¬·²¹ ±²» ±® ³±®» °¸¿-»- ¿¬ ¿²§ °±·²¬ ±² ¬¸» -§-¬»³ ¬± ¬¸» ®ò³ò-ò °¸¿-»ó¬±ó»¿®¬¸ °±©»® º®»¯«»²½§ ª±´¬¿¹» ©¸·½¸ ©±«´¼ ¾» ±¾¬¿·²»¼ ¿¬ ¬¸» ¹·ª»² ´±½¿¬·±² ·² ¬¸» ¿¾-»²½» ±º ¿²§ -«½¸ º¿«´¬ Å×ÛÊ êðìóðíóðêà 2.1.24 earthed neutral system ¿ -§-¬»³ ·² ©¸·½¸ ¬¸» ²»«¬®¿´ ·- ½±²²»½¬»¼ ¬± »¿®¬¸ô »·¬¸»® -±´·¼´§ô ±® ¬¸®±«¹¸ ¿ ®»-·-¬¿²½» ±®  ®»¿½¬¿²½» ±º ´±© »²±«¹¸ ª¿´«» ¬± ®»¼«½» ³¿¬»®·¿´´§ ¬®¿²-·»²¬ ±-½·´´¿¬·±²- ¿²¼ ¬± ¹·ª» ¿ ½«®®»²¬ -«ºº·½·»²¬ º±® -»´»½¬·ª» »¿®¬¸ º¿«´¬ °®±¬»½¬·±²æ ¿÷ ¿ -§-¬»³ ©·¬¸ »ºº»½¬·ª»´§ó»¿®¬¸»¼ ²»«¬®¿´ ¿¬ ¿ ¹·ª»² ´±½¿¬·±² ·- ¿ -§-¬»³ ½¸¿®¿½¬»®·¦»¼ ¾§ ¿² »¿®¬¸ º¿«´¬ º¿½¬±® ¿¬ ¬¸·- °±·²¬ ©¸·½¸ ¼±»- ²±¬ »¨½»»¼ ïôìå ÒÑÌÛ Ì¸·- ½±²¼·¬·±² ·- ±¾¬¿·²»¼ ·² ¹»²»®¿´ ©¸»²ô º±® ¿´´ -§-¬»³ ½±²º·¹«®¿¬·±²-ô ¬¸» ®¿¬·± ±º ¦»®±ó-»¯«»²½» ®»¿½¬¿²½» ¬± °±-·¬·ª»ó-»¯«»²½» ®»¿½¬¿²½» ·- ´»-- ¬¸¿² í ¿²¼ ¬¸» ®¿¬·± ±º ¦»®±ó-»¯«»²½» ®»-·-¬¿²½» ¬± °±-·¬·ª»ó -»¯«»²½» ®»¿½¬¿²½» ·- ´»-- ¬¸¿² ïò

¾÷ ¿ -§-¬»³ ©·¬¸ ²±²ó»ºº»½¬·ª»´§ »¿®¬¸»¼ ²»«¬®¿´ ¿¬ ¿ ¹·ª»² ´±½¿¬·±² ·- ¿ -§-¬»³ ½¸¿®¿½¬»®·¦»¼ ¾§ ¿² »¿®¬¸ º¿«´¬ º¿½¬±® ¿¬ ¬¸·- °±·²¬ ¬¸¿¬ ³¿§ »¨½»»¼ ïôìò 2.1.25 exposed installation ¿² ·²-¬¿´´¿¬·±² ·² ©¸·½¸ ¬¸» ¿°°¿®¿¬«- ·- -«¾¶»½¬ ¬± ±ª»®ª±´¬¿¹»- ±º ¿¬³±-°¸»®·½ ±®·¹·²

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ÒÑÌÛ Í«½¸ ·²-¬¿´´¿¬·±²- ¿®» «-«¿´´§ ½±²²»½¬»¼ ¬± ±ª»®¸»¿¼ ¬®¿²-³·--·±² ´·²»-ô »·¬¸»® ¼·®»½¬´§ô ±® ¬¸®±«¹¸ ¿ -¸±®¬ ´»²¹¬¸ ±º ½¿¾´»ò

Unlock full access with a free trial. 2.1.26 non-exposed installation ¿² ·²-¬¿´´¿¬·±² ·² ©¸·½¸ ¬¸» ¿°°¿®¿¬«·- ²±¬ -«¾¶»½¬ ¬± ±ª»®ª±´¬¿¹»±º ¿¬³±-°¸»®·½ ±®·¹·² Download With Free Trial ÒÑÌÛ

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2.1.27 rated frequency ¬¸» ª¿´«» ±º ¬¸» º®»¯«»²½§ ±² ©¸·½¸ ¬¸» ® »¯«·®»³»²¬- ±º ¬¸·- -¬¿²¼¿®¼ ¿® » ¾¿-»¼

 2.1.28 Sign up to vote on this title rated short-time thermal current ( I th )  Useful  Not useful ¬¸» ®ò³ò-ò ª¿´«» ±º ¬¸» °®·³¿®§ ½«®®»²¬ ©¸·½¸ ¿ ¬®¿²-º±®³»® ©·´´ ©·¬¸-¬¿²¼ º±® ±²» -»½±²¼ ©·¬¸±«¬ -«ºº»®·²¹ ¸¿®³º«´ »ºº »½¬-ô ¬¸» -»½±²¼¿®§ ©·²¼·²¹ ¾»·²¹ -¸±®¬ó½·®½«·¬»¼ 2.1.29

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18678589IEC-60044-1

IEC 60255 - 21-3

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

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2.1.32 rated resistive burden ( R b ) ®¿¬»¼ ª¿´«» ±º ¬¸» -»½±²¼¿®§ ½±²²»½¬»¼ ®»-·-¬·ª» ¾«®¼»² ·² ±¸³2.1.33 secondary winding resistance ( R ct ) -»½±²¼¿®§ ©·²¼·²¹ ¼ò½ò ®»-·-¬¿²½» ·² ±¸³- ½±®®»½¬»¼ ¬± éë pÝ ±® -«½¸ ±¬¸»® ¬»³°»®¿¬«®» ¿³¿§ ¾» -°»½·º·»¼ 2.1.34 composite error ö «²¼»® -¬»¿¼§ó-¬¿¬» ½±²¼·¬·±²-ô ¬¸» ®ò³ò-ò ª¿´«» ±º ¬¸» ¼·ºº»®»²½» ¾»¬©»»²æ ¿÷ ¬¸» ·²-¬¿²¬¿²»±«- ª¿´«»- ±º ¬¸» °®·³¿®§ ½«®®»²¬ô ¿²¼ ¾÷ ¬¸» ·²-¬¿²¬¿²»±«- ª¿´«»- ±º ¬¸» ¿½¬«¿´ -»½±²¼¿®§ ½«®®»²¬ ³«´¬·°´·»¼ ¾§ ¬¸» ®¿¬»¼ ¬®¿²-º±®³¿¬·±² ®¿¬·±ô ¬¸» °±-·¬·ª» -·¹²- ±º ¬¸» °®·³¿®§ ¿²¼ -»½±²¼¿®§ ½«®®»²¬- ½±®®»-ó °±²¼·²¹ ¬± ¬¸» ½±²ª»²¬·±² º±® ¬»®³·²¿´ ³¿®µ·²¹-ò ̸» ½±³°±-·¬» »®®±® ½   ·- ¹»²»®¿´´§ »¨°®»--»¼ ¿- ¿ °»®½»²¬¿¹» ±º ¬¸» ®ò³ò-ò ª¿´«»- ±º ¬¸» °®·³¿®§ ½«®®»²¬ ¿½½±®¼·²¹ ¬± ¬¸» º±®³«´¿æ ïðð ½

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2.1.35 multi-ratio current transformer  ½«®®»²¬ ¬®¿²-º±®³»® ±² ©¸·½¸ ³±®» ®¿¬·±- ¿®» ±¾¬¿·²»¼ ¾§ ½±²²»½¬·²¹ ¬¸» °®·³¿®§ ©·²¼·²¹ -»½¬·±²- ·² -»®·»- ±® °¿®¿´´»´ ±® ¾§ ³»¿²- ±º ¬¿°- ±² ¬¸» - »½±²¼¿®§ ©·²¼·²¹ 2.2

ó ó À    ô À    ô   ô   ô À    ô À    ô   ô   ô À    ô À    ô À  À    ô   ô   ô   ô À    ô À  À  À    ô À    ô ó À 

Additional definitions for measuring current transformers

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2.2.1  Useful  Not useful measuring current transformer  ¿ ½«®®»²¬ ¬®¿²-º±®³»® ·²¬»²¼»¼ ¬± -«°°´§ ·²¼·½¿¬·²¹ ·²-¬®«³»²¬-ô ·²¬»¹®¿¬·²¹ ³»¬»®- ¿²¼ -·³·´¿®  ¿°°¿®¿¬«-

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

18678589IEC-60044-1

IEC 60255 - 21-3

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2.2.3 instrument security factor (FS) ¬¸» ®¿¬·± ±º ®¿¬»¼ ·²-¬®«³»²¬ ´·³·¬ °®·³¿®§ ½«®®»²¬ ¬± ¬¸» ®¿¬»¼ °®·³¿®§ ½«®®»²¬ ÒÑÌÛ ï

߬¬»²¬·±² -¸±«´¼ ¾» °¿·¼ ¬± ¬¸» º¿½¬ ¬¸¿¬ ¬¸» ¿½¬«¿´ ·²-¬®«³»²¬ -»½«®·¬§ º¿½¬±® ·- ¿ºº»½¬»¼ ¾§ ¬¸» ¾«®¼»²ò

ÒÑÌÛ î ײ ¬¸» »ª»²¬ ±º -§-¬»³ º¿«´¬ ½«®®»²¬- º´±©·²¹ ¬¸®±«¹¸ ¬¸» °®·³¿®§ ©·²¼·²¹ ±º ¿ ½«®®»²¬ ¬®¿²-º±®³»®ô ¬¸» -¿º»¬§ ±º ¬¸» ¿°°¿®¿¬«- -«°°´·»¼ ¾§ ¬¸» ¬®¿²-º±®³»® ·- ¹®»¿¬»-¬ ©¸»² ¬¸» ª¿´«» ±º ¬¸» ®¿¬»¼ ·²-¬®«³»²¬ -»½«®·¬§ º¿½¬±® øÚÍ÷ ·- -³¿´´ò

2.2.4 secondary limiting e.m.f  ¬¸» °®±¼«½¬ ±º ¬¸» ·²-¬®«³»²¬ -»½«®·¬§ º¿½¬±® ÚÍô ¬¸» ®¿¬»¼ -»½±²¼¿®§ ½«®®»²¬ ¿²¼ ¬¸» ª»½¬±®·¿´ -«³ ±º ¬¸» ®¿¬»¼ ¾«®¼»² ¿²¼ ¬¸» ·³°»¼¿²½» ±º ¬¸» -»½±²¼¿®§ ©·²¼·²¹ ÒÑÌÛ ï ̸» ³»¬¸±¼ ¾§ ©¸·½¸ ¬¸» -»½±²¼¿®§ ´·³·¬·²¹ »ò³òºò ·- ½¿´½«´¿¬»¼ ©·´´ ¹·ª» ¿ ¸·¹¸»® ª¿´«» ¬¸¿² ¬¸» ®»¿´ ±²»ò ׬ ©¿- ½¸±-»² ·² ±®¼»® ¬± ¿°°´§ ¬¸» -¿³» ¬»-¬ ³»¬¸±¼ ¿- ·² ïïòê ¿²¼ ïîòë º±® °®±¬»½¬·ª» ½«®®»²¬ ¬®¿²-º±®³»®-ò Ѭ¸»® ³»¬¸±¼- ³¿§ ¾» «-»¼ ¾§ ¿¹®»»³»²¬ ¾»¬©»»² ³¿²«º¿½¬«®»® ¿²¼ °«®½¸¿-»®ò ÒÑÌÛ î Ú±® ½¿´½«´¿¬·²¹ ¬¸» -»½±²¼¿®§ ´·³·¬·²¹ »ò³òºòô ¬¸» -»½±²¼¿®§ ©·²¼·²¹ ®»-·-¬¿²½» -¸±«´¼ ¾» ½±®®»½¬»¼ ¬± ¿ ¬»³°»®¿¬«®» ±º éë pÝò

2.3

Additional definitions for protective current transformers

2.3.1 protective current transformer  ¿ ½«®®»²¬ ¬®¿²-º±®³»® ·²¬»²¼»¼ ¬± -«°°´§ °®±¬»½¬·ª» ®»´¿§2.3.2 rated accuracy limit primary current You're Reading a Preview ¬¸» ª¿´«» ±º °®·³¿®§ ½«®®»²¬ «° ¬± ©¸·½¸ ¬¸» ¬®¿²-º±®³»® ©·´´ ½±³°´§ ©·¬¸ ¬¸» ®»¯«·®»³»²¬- º±®  ½±³°±-·¬» »®®±®  Unlock full access with a free trial. 2.3.3 accuracy limit factor  Download With Free Trial ¬¸» ®¿¬·± ±º ¬¸» ®¿¬»¼ ¿½½«®¿½§ ´·³·¬ °®·³¿®§ ½«®®»²¬ ¬± ¬¸» ®¿¬»¼ °®·³¿®§ ½«®®»²¬ 2.3.4 secondary limiting e.m.f. ¬¸» °®±¼«½¬ ±º ¬¸» ¿½½«®¿½§ ´·³·¬ º¿½¬±®ô ¬¸» ®¿¬»¼ -»½±²¼¿®§ ½«®®»²¬ ¿²¼ ¬¸» ª»½¬±®·¿´ -«³ ±º  ¬¸» ®¿¬»¼ ¾«®¼»² ¿²¼ ¬¸» ·³°»¼¿²½» ±º ¬¸» -»½±²¼¿®§ ©·²¼·²¹

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2.3.5 Sign up to vote on this title class PR protective current transformer  Useful  Not useful ¿ ½«®®»²¬ ¬®¿²-º±®³»® ©·¬¸ ´·³·¬»¼ ®»³¿²»²½» º¿½¬±® º±®  ©¸·½¸ô ·² -±³» ½¿-»-ô ¿ ª¿´«» ±º ¬¸» -»½±²¼¿®§ ´±±° ¬·³» ½±²-¬¿²¬ ¿²¼ñ±® ¿ ´·³·¬·²¹ ª¿´«» ±º ¬¸» ©·²¼·²¹ ®»-·-¬¿²½» ³¿§ ¿´-± ¾» -°»½·º·»¼

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

2.3.8 remanence factor (K r ) ¬¸» ®¿¬·± K ®  ã ïðð ®  ñ

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18678589IEC-60044-1

IEC 60255 - 21-3

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»¨°®»--»¼ ¿- ¿ °»®½»²¬¿¹» øû÷

2.3.9 rated secondary loop time constant ( T s ) ª¿´«» ±º ¬¸» ¬·³» ½±²-¬¿²¬ ±º ¬¸» -»½±²¼¿®§ ´±±° ±º ¬¸» ½«®®»²¬ ¬®¿²-º±®³»® ±¾¬¿·²»¼ º®±³ ¬¸» -«³ ±º ¬¸» ³¿¹²»¬·¦·²¹ ¿²¼ ¬¸» ´»¿µ¿¹» ·²¼«½¬¿²½» ø L- ÷ ¿²¼ ¬¸» -»½±²¼¿®§ ´±±° ®»-·-¬¿²½» øR - ÷ T -  ã L-  ñ R 2.3.10 excitation characteristic ¿ ¹®¿°¸·½¿´ ±® ¬¿¾«´¿® °®»-»²¬¿¬·±² ±º ¬¸» ®»´¿¬·±²-¸·° ¾»¬©»»² ¬¸» ®ò³ò-ò ª¿´«» ±º ¬¸» »¨½·¬·²¹ ½«®®»²¬ ¿²¼ ¿ -·²«-±·¼¿´ ®ò³ò-ò »ò³òºò ¿°°´·»¼ ¬± ¬¸» -»½±²¼¿®§ ¬»®³·²¿´- ±º ¿ ½«®®»²¬ ¬®¿²-º±®³»®ô ¬¸» °®·³¿®§ ¿²¼ ±¬¸»® ©·²¼·²¹- ¾»·²¹ ±°»²ó½·®½«·¬»¼ô ±ª»® ¿ ®¿²¹» ±º ª¿´«»-«ºº·½·»²¬ ¬± ¼»º·²» ¬¸» ½¸¿®¿½¬»®·-¬·½- º®±³ ´±© ´»ª»´- ±º »¨½·¬¿¬·±² «° ¬± ¬¸» ®¿¬»¼ µ²»» °±·²¬ »ò³òºò 2.3.11 class PX protective current transformer  ¿ ¬®¿²-º±®³»® ±º ´±© ´»¿µ¿¹» ®»¿½¬¿²½» º±® ©¸·½¸ µ²±©´»¼¹» ±º ¬¸» ¬®¿²-º±®³»® -»½±²¼¿®§ »¨½·¬¿¬·±² ½¸¿®¿½¬»®·-¬·½ô -»½±²¼¿®§ ©·²¼·²¹ ®»-·-¬¿²½»ô -»½±²¼¿®§ ¾«®¼»² ®»-·-¬¿²½» ¿²¼ ¬«®²®¿¬·± ·- -«ºº·½·»²¬ ¬± ¿--»-- ·¬- °»®º±®³¿²½» ·² ®»´¿¬·±² ¬± ¬¸» °®±¬»½¬·ª» ®»´¿§ -§-¬»³ ©·¬¸ ©¸·½¸ ·¬ ·- ¬± ¾» «-»¼

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2.3.12 rated knee point e.m.f. ( E k ) Unlock full access with a free trial. ¬¸¿¬ ³·²·³«³ -·²«-±·¼¿´ »ò³òºò ø®ò³ò-ò÷ ¿¬ ®¿¬»¼ °±©»® º®»¯«»²½§ ©¸»² ¿°°´·»¼ ¬± ¬¸» -»½±²¼¿®§ ¬»®³·²¿´- ±º ¬¸» ¬®¿²-º±®³»®ô ¿´´ ±¬¸»® ¬»®³·²¿´- ¾»·²¹ ±°»²ó½·®½«·¬»¼ô ©¸·½¸ ©¸»² ·²½®»¿-»¼ ¾§ ïð û ½¿«-»- ¬¸» ®ò³ò-ò »¨½·¬·²¹ ½«®®»²¬ ¬± ·²½®»¿-» ¾§ ²± ³±®» ¬¸¿² ëð û ÒÑÌÛ

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̸» ¿½¬«¿´ µ²»» °±·²¬ »ò³òºò ©·´´ ¾»

¬¸» ®¿¬»¼ µ²»» °±·²¬ »ò³òºò

2.3.13 rated turns ratio ¬¸» ®»¯«·®»¼ ®¿¬·± ±º ¬¸» ²«³¾»® ±º °®·³ ¿®§ ¬«®²- ¬± ¬¸» ²«³¾»® ±º -»½±²¼¿®§ ¬«®²ÛÈßÓÐÔÛ ï

ïñêðð ø±²» °®·³¿®§ ¬«®² ©·¬¸ -·¨ ¸«²¼®»¼ -»½±²¼¿®§ ¬«®²-÷ò

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Sign up vote onïthis îñï îðð ø¿ ½«®®»²¬ ¬®¿²-º±®³»® ±º -·³·´¿® ®¿¬·± ¬± to »¨¿³°´» ¾«¬title »³°´±§·²¹ ¬©± °®·³¿®§ ¬«®²-÷ò

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2.3.14 turns ratio error 

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3

18678589IEC-60044-1

IEC 60255 - 21-3

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Normal and special service conditions

Ü»¬¿·´»¼ ·²º±®³¿¬·±² ½±²½»®²·²¹ ½´¿--·º·½¿¬·±² ±º »²ª·®±²³»²¬¿´ ½±²¼·¬±²- ·- ¹·ª»² ·² ¬¸» ×ÛÝ êðéîï -»®·»-ò 3.1

Normal service conditions

3.1.1

Ambient air temperature

̸» ½«®®»²¬ ¬®¿²-º±®³»®- ¿®» ½´¿--·º·»¼ ·² ¬¸®»» ½¿¬»¹±®·»- ¿- ¹·ª»² ·² ¬¿¾´» ïò Table 1   Temperature categories Category

Minimum temperature

Maximum temperature

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ÒÑÌÛ ×² ¬¸» ½¸±·½» ±º ¬¸» ¬»³°»®¿¬«®» ½¿¬»¹±®§ô -¬±®¿¹» ¿²¼ ¬®¿²-°±®¬¿¬·±² ½±²¼·¬·±²-¸±«´¼ ¾» ¿´-± ½±²-·¼»®»¼ò

3.1.2

Altitude

̸» ¿´¬·¬«¼» ¼±»- ²±¬ »¨½»»¼ ïððð ³ò You're Reading a 3.1.3

Preview

Vibrations or earth tremors Unlock full access with a free trial.

Ê·¾®¿¬·±²- ¼«» ¬± ½¿«-»- »¨¬»®²¿´ ¬± ¬¸» ½«®®»²¬ ¬®¿²-º±®³»® ±® »¿®¬¸ ¬®»³±®- ¿® » ²»¹´·¹·¾´»ò

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3.1.4

Other service conditions for indoor current transformers

Ѭ¸»® -»®ª·½» ½±²¼·¬·±²- ½±²-·¼»®»¼ ¿®» ¬¸» º±´´±©·²¹æ ¿÷ ¬¸» ·²º´«»²½» ±º -±´¿® ®¿¼·¿¬·±² ³¿§ ¾» ²»¹´»½¬»¼å ¾÷ ¬¸» ¿³¾·»²¬ ¿·® ·- ²±¬ -·¹²·º·½¿²¬´§ °±´´«¬»¼ ¾§ ¼«-¬ô -³±µ»ô ½±®®±-·ª» ¹¿-»-ô ª¿°±«®- ±® -¿´¬å ½÷ ¬¸» ½±²¼·¬·±²- ±º ¸«³·¼·¬§ ¿®» ¿- º±´´±©-æ

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Not useful  Useful ï÷ ¬¸» ¿ª»®¿¹» ª¿´«» ±º ¬¸» ®»´¿¬·ª» ¸«³·¼·¬§ô ³»¿-«®»¼ ¼«®·²¹ ¿ °»®·±¼ ±º îì ¸ô ¼±»- ²±¬ »¨½»»¼ çë ûå î÷ ¬¸» ¿ª»®¿¹» ª¿´«» ±º ¬¸» ©¿¬»® ª¿°±«® °®»--«®» º±® ¿ °»®·±¼ ±º îì ¸ ¼±»- ²±¬ »¨½»»¼ îôî

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IEC 62271-200 CELDAS MT.pdf

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

3.1.5

18678589IEC-60044-1

IEC 60255 - 21-3

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Other service conditions for outdoor current transformers

Ѭ¸»® -»®ª·½» ½±²¼·¬·±²- ½±²-·¼»®»¼ ¿®»æ ¿÷ ¿ª»®¿¹» ª¿´«» ±º ¬¸» ¿³¾·»²¬ ¿·® ¬»³°»®¿¬«®»ô ³»¿-«®»¼ ±ª»® ¿ °»®·±¼ ±º îì ¸ô ¼±»- ²±¬ »¨½»»¼ íë pÝå ¾÷ -±´¿® ®¿¼·¿¬·±² «° ¬± ¿ ´»ª»´ ±º ïððð Éñ³ î  ø±² ¿ ½´»¿® ¼¿§ ¿¬ ²±±²÷ -¸±«´¼ ¾» ½±²-·¼»®»¼å ½÷ ¬¸» ¿³¾·»²¬ ¿·® ³¿§ ¾» °±´´«¬»¼ ¾§ ¼«-¬ô -³±µ»ô ½±®®±-·ª» ¹¿-ô ª¿°±«®- ±® -¿´¬ò ̸» °±´´«¬·±² ´»ª»´- ¿®» ¹·ª»² ·² ¬¿¾´» éå ¼÷ ¬¸» ©·²¼ °®»--«®» ¼±»- ²±¬ »¨½»»¼ éðð п ø½±®®»-°±²¼·²¹ ¬± íì ³ñ- ©·²¼ -°»»¼÷å »÷ ¿½½±«²¬ -¸±«´¼ ¾» ¬¿µ»² ±º ¬¸» °®»-»²½» ±º ½±²¼»²-¿¬·±² ±® °®»½·°·¬¿¬·±²ò 3.2

Special service conditions

ɸ»² ½«®®»²¬ ¬®¿²-º±®³»®- ³¿§ ¾» «-»¼ «²¼»® ½±²¼·¬·±²- ¼·ºº»®»²¬ º®±³ ¬¸» ²±®³¿´ -»®ª·½» ½±²¼·¬·±²- ¹·ª»² ·² íòïô ¬¸» «-»®Ž- ®»¯«·®»³»²¬- -¸±«´¼ ®»º»® ¬± -¬¿²¼¿®¼·¦»¼ -¬»°- ¿- º±´´±©-ò 3.2.1

Ambient air temperature

Ú±® ·²-¬¿´´¿¬·±² ·² ¿ °´¿½» ©¸»®» ¬¸» ¿³¾·»²¬ ¬»³°»®¿¬«®» ½¿² ¾» -·¹²·º·½¿²¬´§ ±«¬-·¼» ¬¸» ²±®³¿´ -»®ª·½» ½±²¼·¬·±² ®¿²¹» -¬¿¬»¼ ·² íòïòïô ¬¸» °®»º»®®»¼ ®¿²¹»- ±º ³·²·³«³ ¿²¼ ³¿¨·³«³ ¬»³°»®¿¬«®» ¬± ¾» -°»½·º·»¼ -¸±«´¼ ¾»æ  Š

Šëð pÝ ¿ ²¼ ì ð pÝ º±® ª»®§ ½±´¼ ½´·³¿¬»- å

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Šë p Ý ¿²¼ ëð pÝ º±® ª»®§ ¸±¬ ½´·³ ¿¬»-ò

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ÒÑÌÛ Ë²¼»® ½»®¬¿·² ½±²¼·¬·±²- ±º -±´¿® ®¿¼·¿¬·±²ô ¿°°®±°®·¿¬» ³»¿-«®»- »ò¹ò ®±±º·²¹ô º±®½»¼ ª»²¬·´¿¬·±²ô »¬½ò ³¿§ ¾» ²»½»--¿®§ô ±® ¼»®¿¬·²¹ ³¿§ ¾» «-»¼ô ·² ±®¼»® ²±¬ ¬± »¨½»»¼ ¬¸» -°»½·º·»¼ ¬»³°»®¿¬«®» ®·-»-ò

ó ó À    ô À    ô   ô   ô À    ô À    ô   ô   ô À    ô À    ô À  À    ô   ô   ô   ô À    ô À  À  À    ô À    ô ó À  ó À    ô   ô À    ô   ô À    ô À    ô   ô À  ó ó ó

3.2.2

Altitude

Ú±® ·²-¬¿´´¿¬·±² ¿¬ ¿² ¿´¬·¬«¼» ¸·¹¸»® ¬¸¿² ïððð ³ô ¬¸» ¿®½·²¹ ¼·-¬¿²½» «²¼»® ¬¸» -¬¿²¼¿®¼·¦»¼ ®»º»®»²½» ¿¬³±-°¸»®·½ ½±²¼·¬·±²- -¸¿´´ ¾» ¼»¬»®³·²»¼ ¾§ ³«´¬·°´§·²¹ ¬¸» ©·¬¸-¬¿²¼ ª±´¬¿¹» ®»¯«·®»¼ ¿¬ ¬¸» -»®ª·½» ´±½¿¬·±² ¾§ ¿ º¿½¬±® µ ·² ¿½½±®¼¿²½»Sign ©·¬¸upº·¹«®» ïò on this title to vote

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3.2.3

Earthquakes

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IEC 62271-200 CELDAS MT.pdf

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

4

18678589IEC-60044-1

IEC 60255 - 21-3

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Š íï Š

Ratings

4.1 4.1.1

Standard values of rated primary currents Single-ratio transformers

̸» -¬¿²¼¿®¼ ª¿´«»- ±º ®¿¬»¼ °®·³¿®§ ½«®®»²¬- ¿®»æ ïð Š ïîôë Š ïë Š îð Š îë Š íð Š ìð Š ëð Š êð Š éë ßô ¿²¼ ¬¸»·® ¼»½·³¿´ ³«´¬·°´»- ±® º®¿½¬·±²-ò ̸» °®»º»®®»¼ ª¿´«»- ¿®» ¬¸±-» «²¼»®´·²»¼ò 4.1.2

Multi-ratio transformers

̸» -¬¿²¼¿®¼ ª¿´«»- ¹·ª»² ·² ìòïòï ®»º»® ¬± ¬¸» ´±©»-¬ ª¿´«»- ±º ®¿¬»¼ °®·³¿®§ ½«®®»²¬ò 4.2

Standard values of rated secondary currents

̸» -¬¿²¼¿®¼ ª¿´«»- ±º ®¿¬»¼ -»½±²¼¿®§ ½«®®»²¬- ¿®» ï ßô î ß ¿²¼ ë ßô ¾«¬ ¬¸» °®»º»®®»¼ ª¿´«» ·- ë ßò ÒÑÌÛ Ú±® ¬®¿²-º±®³»®- ·²¬»²¼»¼ º±® ¼»´¬¿ó½±²²»½¬»¼ ¹®±«°-ô ¬¸»-» ®¿¬·²¹- ¼·ª·¼»¼ ¾§

4.3

í ¿®» ¿´-± -¬¿²¼¿®¼ ª¿´«»-ò

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Rated continuous thermal current

Unlock full access½«®®»²¬ with a free trial.®¿¬»¼ °®·³¿®§ ½«®®»²¬ò ̸» -¬¿²¼¿®¼ ª¿´«» ±º ®¿¬»¼ ½±²¬·²«±«¬¸»®³¿´ ·- ¬¸» ɸ»² ¿ ®¿¬»¼ ½±²¬·²«±«- ¬¸»®³¿´ ½«®®»²¬ ¹®»¿¬»® ¬¸¿² ®¿¬»¼ °®·³¿®§ ½«®®»²¬ ·- -°»½·º·»¼ô ¬¸» Download With Free Trial °®»º»®®»¼ ª¿´«»- -¸±«´¼ ¾» ïîð û ¬± ïëð û ¿²¼ îðð û ±º ®¿¬»¼ °®·³¿®§ ½«®®»²¬ò 4.4

Standard values of rated output

̸» -¬¿²¼¿®¼ ª¿´«»- ±º ®¿¬»¼ ±«¬°«¬ «° ¬± íð Êß ¿®»æ îôë Š ëôð Š ïð Š ïë ¿²¼ íð Êßò

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ÒÑÌÛ Ú±® ¿ ¹·ª»² ¬®¿²-º±®³»®ô °®±ª·¼»¼ ±²» ±º ¬¸» ª¿´«»- ±º ®¿¬»¼ ±«¬°«¬ ·- -¬¿²¼¿®¼ ¿²¼ ¿--±½·¿¬»¼ ©·¬¸ ¿ -¬¿²¼¿®¼ ¿½½«®¿½§ ½´¿--ô ¬¸» ¼»½´¿®¿¬·±² ±º ±¬¸»® ®¿¬»¼ ±«¬°«¬-ô ©¸·½¸ ³¿§ ¾» ²±²ó-¬¿²¼¿®¼ ª¿´«»-ô ¾«¬ ¿--±½·¿¬»¼ ©·¬¸ ±¬¸»® -¬¿²¼¿®¼ ¿½½«®¿½§ ½´¿--»-ô ·- ²±¬ °®»½´«¼»¼ò

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

4.5.2

18678589IEC-60044-1

IEC 60255 - 21-3

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Rated dynamic current (I dyn )

̸» ª¿´«» ±º ¬¸» ®¿¬»¼ ¼§²¿³·½ ½«®®»²¬ ø I ¼§² ÷ -¸¿´´ ²±®³¿´´§ ¾» îòë ¬·³»- ¬¸» ®¿¬»¼ -¸±®¬ó¬·³» ¬¸»®³¿´ ½«®®»²¬ øI ¬¸ ÷ ¿²¼ ·¬ -¸¿´´ ¾» ·²¼·½¿¬»¼ ±² ¬¸» ®¿¬·²¹ °´¿¬» ©¸»² ·¬ ·- ¼·ºº»®»²¬ º®±³ ¬¸·ª¿´«» ø-»» îòïòîê÷ò 4.6

Limits of temperature rise

̸» ¬»³°»®¿¬«®» ®·-» ±º ¿ ½«®®»²¬ ¬®¿²-º±®³»® ©¸»² ½¿®®§·²¹ ¿ °®·³¿®§ ½«®®»²¬ »¯«¿´ ¬± ¬¸» ®¿¬»¼ ½±²¬·²«±«- ¬¸»®³¿´ ½«®®»²¬ô ©·¬¸ ¿ «²·¬§ °±©»®óº¿½¬±® ¾«®¼»² ½±®®»-°±²¼·²¹ ¬± ¬¸» ®¿¬»¼ ±«¬°«¬ô -¸¿´´ ²±¬ »¨½»»¼ ¬¸» ¿°°®±°®·¿¬» ª¿´«» ¹·ª»² ·² ¬¿¾´» îò ̸»-» ª¿´«»- ¿®» ¾¿-»¼ ±² ¬¸» -»®ª·½» ½±²¼·¬·±²- ¹·ª»² ·² ½´¿«-» íò ׺ ¿³¾·»²¬ ¬»³°»®¿¬«®»- ·² »¨½»-- ±º ¬¸» ª¿´«»- ¹·ª»² ·² íòï ¿®» -°»½·º·»¼ô ¬¸» °»®³·--·¾´» ¬»³°»®¿¬«®» ®·-» ·² ¬¿¾´» î -¸¿´´ ¾» ®»¼«½»¼ ¾§ ¿² ¿³±«²¬ »¯«¿´ ¬± ¬¸» »¨½»-- ¿³¾·»²¬ ¬»³°»®¿¬«®»ò ׺ ¿ ¬®¿²-º±®³»® ·- -°»½·º·»¼ º±® -»®ª·½» ¿¬ ¿² ¿´¬·¬«¼» ·² »¨½»-- ±º ïððð ³ô ¿²¼ ¬»-¬»¼ ¿¬ ¿² ¿´¬·¬«¼» ¾»´±© ïððð ³ô ¬¸» ´·³·¬- ±º ¬»³°»®¿¬«®» ®·-» ¹·ª»² ·² ¬¿¾´» î -¸¿´´ ¾» ®»¼«½»¼ ¾§ ¬¸» º±´´±©·²¹ ¿³±«²¬- º±® »¿½¸ ïðð ³ ¬¸¿¬ ¬¸» ¿´¬·¬«¼» ¿¬ ¬¸» ±°»®¿¬·²¹ -·¬» »¨½»»¼- ïððð ³æ ¿÷ ±·´ ·³³»®-»¼ ¬®¿²-º±®³»®- ðôì ûå ¾÷ ¼®§ó¬§°» ¬®¿²-º±®³»®- ðôë ûò ̸» ¬»³°»®¿¬«®» ®·-» ±º ¬¸» ©·²¼·²¹- ·- ´·³·¬»¼ ¾§ ¬¸» ´±©»-¬ ½´¿-- ±º ·²-«´¿¬·±²ô »·¬¸»® ±º ¬¸» ©·²¼·²¹ ·¬-»´ºô ±® ±º ¬¸» -«®®±«²¼·²¹ ³»¼·«³ ·² ©¸·½¸ ·¬ ·- »³¾»¼¼»¼ò ̸» ³¿¨·³«³ You're Reading a Preview ¬»³°»®¿¬«®» ®·-»- ±º ¬¸» ·²-«´¿¬·±² ½´¿--»- ¿®» ¿- ¹·ª»² ·² ¬¿¾´» îò

Unlock full access with a free trial. Table 2   Limits of temperature rise of the windings

Download With Free Trial Maximum temperature rise

Class of insulation (in accordance with IEC 60085)

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18678589IEC-60044-1

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ɸ»² ¬¸» ¬®¿²-º±®³»® ·- º·¬¬»¼ ©·¬¸ ¿ ½±²-»®ª¿¬±® ¬¿²µô ¸¿- ¿² ·²»®¬ ¹¿- ¿¾±ª» ¬¸» ±·´ô ±® ·¸»®³»¬·½¿´´§ -»¿´»¼ô ¬¸» ¬»³°»®¿¬«®» ®·-» ±º ¬¸» ±·´ ¿¬ ¬¸» ¬±° ±º ¬¸» ¬¿²µ ±® ¸±«-·²¹ -¸¿´´ ²±¬ »¨½»»¼ ëë Õò ɸ»² ¬¸» ¬®¿²-º±®³»® ·- ²±¬ -± º·¬¬»¼ ±® ¿®®¿²¹»¼ô ¬¸» ¬»³°»®¿¬«®» ®·-» ±º ¬¸» ±·´ ¿¬ ¬¸» ¬±° ±º  ¬¸» ¬¿²µ ±® ¸±«-·²¹ -¸¿´´ ²±¬ »¨½»»¼ ëð Õò ̸» ¬»³°»®¿¬«®» ®·-» ³»¿-«®»¼ ±² ¬¸» »¨¬»®²¿´ -«®º¿½» ±º ¬¸» ½±®» ¿²¼ ±¬¸»® ³»¬¿´´·½ °¿®¬©¸»®» ·² ½±²¬¿½¬ ©·¬¸ô ±® ¿¼¶¿½»²¬ ¬±ô ·²-«´¿¬·±² -¸¿´´ ²±¬ »¨½»»¼ ¬¸» ¿°°®±°®·¿¬» ª¿´«» ·² ¬¿¾´» îò

5

Design requirements

5.1

Insulation requirements

̸»-» ®»¯«·®»³»²¬- ¿°°´§ ¬± ¿´´ ¬§°»- ±º ½«®®»²¬ ¬®¿²-º±®³»® ·²-«´¿¬·±²ò Ú±® ¹¿- ·²-«´¿¬»¼ ½«®®»²¬ ¬®¿²-º±®³»®-ô -«°°´»³»²¬¿®§ ®»¯«·®»³»²¬- ³¿§ ¾» ²»½»--¿®§ ø«²¼»® ½±²-·¼»®¿¬·±²÷ò 5.1.1

Rated insulation levels for primary windings

̸» ®¿¬»¼ ·²-«´¿¬·±² ´»ª»´ ±º ¿ °®·³¿®§ ©·²¼·²¹ ±º ¿ ½«®®»²¬ ¬®¿²-º±®³»® -¸¿´´ ¾» ¾¿-»¼ ±² ·¬¸·¹¸»-¬ ª±´¬¿¹» º±® »¯«·°³»²¬ U ³ ò Ú±® ¿ ½«®®»²¬ ¬®¿²-º±®³»® ©·¬¸±«¬ °®·³¿®§ ©·²¼·²¹ ¿²¼ ©·¬¸±«¬ °®·³¿®§ ·²-«´¿¬·±² ±º ·¬- ±©²ô ¬¸» ª¿´«» U ³  ã ðôéî µÊ ·- ¿--«³»¼ò You're Reading a Preview

Unlock full access with a free trial. 5.1.1.1 Ú±® ©·²¼·²¹- ¸¿ª·²¹ U ³  ã ðôéî µÊ ±® ïôî µÊô ¬¸» ®¿¬»¼ ·²-«´¿¬·±² ´»ª»´ ·- ¼»¬»®³·²»¼ ¾§ ¬¸» ®¿¬»¼ °±©»®óº®»¯«»²½§ ©·¬¸-¬¿²¼ ª±´¬¿¹»ô ¿½½±®¼·²¹ ¬± ¬¿¾´» íò

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5.1.1.2 Ú±® ©·²¼·²¹- ¸¿ª·²¹ U ³   ã íôê µÊ ¿²¼ ¹®»¿¬»® ¾«¬ ´»-- ¬¸¿² íðð µÊô ¬¸» ®¿¬»¼ ·²-«´¿¬·±² ´»ª»´ ·- ¼»¬»®³·²»¼ ¾§ ¬¸» ®¿¬»¼ ´·¹¸¬²·²¹ ·³°«´-» ¿²¼ °±©»®óº®»¯«»²½§ ©·¬¸-¬¿²¼ ª±´¬¿¹»-ô ¿²¼ -¸¿´´ ¾» ½¸±-»² ·² ¿½½±®¼¿²½» ©·¬¸ ¬¿¾´» íò Ú±® ¬¸» ½¸±·½» ¾»¬©»»² ¬¸» ¿´¬»®²¿¬·ª» ´»ª»´- º±® ¬¸» -¿³» ª¿´«» ±º  U ³ ô -»» ×ÛÝ êððéïóïò

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to vote on this title 5.1.1.3 Ú±® ©·²¼·²¹- ¸¿ª·²¹ U ³   ¹®»¿¬»® ¬¸¿² ±® »¯«¿´ ¬±Sign íððup µÊô ¬¸» ®¿¬»¼ ·²-«´¿¬·±² ´»ª»´ ·¼»¬»®³·²»¼ ¾§ ¬¸» ®¿¬»¼ -©·¬½¸·²¹ ¿²¼ ´·¹¸¬²·²¹ ·³°«´-» ©·¬¸-¬¿²¼ ª±´¬¿¹»-ô ¿²¼ -¸¿´´ ¾»  Useful  Not useful ½¸±-»² ·² ¿½½±®¼¿²½» ©·¬¸ ¬¿¾´» ìò Ú±® ¬¸» ½¸±·½» ¾»¬©»»² ¬¸» ¿´¬»®²¿¬·ª» ´»ª»´- º±® ¬¸» -¿³» ª¿´«» ±º  U ³ ô -»» ×ÛÝ êððéïóïò

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

18678589IEC-60044-1

IEC 60255 - 21-3

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Table 3   Rated insulation levels f or transformer primary windings having highest voltage for equipment  U m  < 300 kV Highest voltage for equipment U m (r.m.s.)

Rated power-frequency withstand voltage (r.m.s.)

Rated lightning impulse withstand voltage (peak)

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Table 4   Rated insulation levels f or transformer primary windings having highest voltage for equipment  U m  300 kV

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Highest voltage for equipment U m (r.m.s.)

Rated switching impulse withstand voltage (peak)

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

5.1.2

18678589IEC-60044-1

IEC 60255 - 21-3

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Š íç Š

Other requirements for primary winding insulation

5.1.2.1

Power-frequency withstand voltage

É·²¼·²¹- ¸¿ª·²¹ ¸·¹¸»-¬ ª±´¬¿¹» º±® »¯«·°³»²¬ U ³   íðð µÊ -¸¿´´ ©·¬¸-¬¿²¼ ¬¸» °±©»®ó º®»¯«»²½§ ©·¬¸-¬¿²¼ ª±´¬¿¹» ½±®®»-°±²¼·²¹ ¬± ¬¸» -»´»½¬»¼ ´·¹¸¬²·²¹ ·³°«´-» ©·¬¸-¬¿²¼ ª±´¬¿¹» ¿½½±®¼·²¹ ¬± ¬¿¾´» ëò 5.1.2.2

Partial discharges

ﮬ·¿´ ¼·-½¸¿®¹» ®»¯«·®»³»²¬- ¿®» ¿°°´·½¿¾´» ¬± ½«®®»²¬ ¬®¿²-º±®³»®- ¸¿ª·²¹ U ³   ²±¬ ´»-¬¸¿² éôî µÊò ̸» °¿®¬·¿´ ¼·-½¸¿®¹» ´»ª»´ -¸¿´´ ²±¬ »¨½»»¼ ¬¸» ´·³·¬- -°»½·º·»¼ ·² ¬¿¾´» êô ¿¬ ¬¸» °¿®¬·¿´ ¼·-½¸¿®¹» ¬»-¬ ª±´¬¿¹» -°»½·º·»¼ ·² ¬¸» -¿³» ¬¿¾´»ô ¿º¬»® ¿ °®»-¬®»--·²¹ °»®º±®³»¼ ¿½½±®¼·²¹ ¬± ¬¸» °®±½»¼«®»- ±º èòîòîò Table 5   Power frequency withstand voltages for transf ormer primary windings having highest voltage for equipment  U m  300 kV Rated lightning impulse withstand voltage (peak)

Rated power frequency withstand voltage (r.m.s.)

µÊ

µÊ

çëð ïðëð ïïéë ïíðð

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Table 6   Partial discharge test voltag es and permissible levels Type of earthing of the system

PD test voltage (r.m.s.)

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Type of insulation

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5.1.2.3 ó ó À    ô À    ô   ô   ô À    ô À    ô   ô   ô À    ô À    ô À  À    ô   ô   ô   ô À    ô À  À  À    ô À    ô ó À  ó À    ô   ô À    ô   ô À    ô À    ô   ô À  ó ó ó

18678589IEC-60044-1

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Chopped lightning impulse

׺ ¿¼¼·¬·±²¿´´§ -°»½·º·»¼ô ¬¸» °®·³¿®§ ©·²¼·²¹ -¸¿´´ ¿´-± ¾» ½¿°¿¾´» ±º ©·¬¸-¬¿²¼·²¹ ¿ ½¸±°°»¼ ´·¹¸¬²·²¹ ·³°«´-» ª±´¬¿¹» ¸¿ª·²¹ ¿ °»¿µ ª¿´«» ±º ïïë û ±º ¬¸» º«´´ ´·¹¸¬²·²¹ ·³°«´-» ª±´¬¿¹»ò ÒÑÌÛ

Ô±©»® ª¿´«»- ±º ¬»-¬ ª±´¬¿¹» ³¿§ ¾» ¿¹®»»¼ ¾»¬©»»² ³¿²«º¿½¬«®»® ¿²¼ °«®½¸¿-»®ò

5.1.2.4

Capacitance and dielectric dissipation factor 

̸»-» ®»¯«·®»³»²¬- ¿°°´§ ±²´§ ¬± ¬®¿²-º±®³»®- ©·¬¸ ´·¯«·¼ ·³³»®-»¼ °®·³¿®§ ©·²¼·²¹ ·²-«´¿¬·±² ¸¿ª·²¹ U ³  éîôë µÊò ̸» ª¿´«»- ±º ½¿°¿½·¬¿²½» ¿²¼ ¼·»´»½¬®·½ ¼·--·°¿¬·±² º¿½¬±® ø¬¿² ÷ -¸¿´´ ¾» ®»º»®®»¼ ¬± ¬¸» ®¿¬»¼ º®»¯«»²½§ ¿²¼ ¬± ¿ ª±´¬¿¹» ´»ª»´ ·² ¬¸» ®¿²¹» º®±³ ïð µÊ ¬±  U ³ ñ í ò ÒÑÌÛ ï ̸» °«®°±-» ·- ¬± ½¸»½µ ¬¸» «²·º±®³·¬§ ±º ¬¸» °®±¼«½¬·±²ò Ô·³·¬- º±® ¬¸» °»®³·--·¾´» ª¿®·¿¬·±²- ³¿§ ¾» ¬¸» -«¾¶»½¬ ±º ¿² ¿¹®»»³»²¬ ¾»¬©»»² ³¿²«º¿½¬«®»® ¿²¼ °«®½¸¿-»®ò ÒÑÌÛ î

̸» ¼·»´»½¬®·½ ¼·--·°¿¬·±² º¿½ ¬±® ·- ¼»°»²¼»²¬ ±² ¬¸» ·²-«´¿¬·±² ¼»-·¹²ô ¿²¼ ±² ¾±¬¸ ª±´¬¿¹» ¿²¼

¬»³°»®¿¬«®»ò ׬- ª¿´«» ¿¬  U ³ ñ í ¿²¼ ¿³¾·»²¬ ¬»³°»®¿¬«®» ²±®³¿´´§ ¼±»- ²±¬ »¨½»»¼ ðôððëò

5.1.2.5

Multiple chopped impulses

׺ ¿¼¼·¬·±²¿´´§ ¿¹®»»¼ô ¬¸» °®·³¿®§ ©·²¼·²¹ ±º ±·´ó·³³»®-»¼ ÝÌ- ¸¿ª·²¹ U ³   íðð µÊ -¸¿´´ ¾» ½¿°¿¾´» ±º ©·¬¸-¬¿²¼·²¹ ³«´¬·°´» ½¸±°°»¼ ·³°«´-»- º±® ½¸»½µ·²¹ ¬¸» ¾»¸¿ª·±«® ¬± ¸·¹¸ó º®»¯«»²½§ -¬®»--»- »¨°»½¬»¼ ·² ±°»®¿¬·±²ò

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 ß- ¬¸»®» ·- ²±¬ »²±« ¹¸ »¨°» ®·»²½» ¬± °®±°±-» ¿ ¼»º·²·¬ ·ª» ¬»-¬ °®±¹ ®¿³ ³» ¿²¼ ¿½½»°¬¿ ²½» Unlock full access with·-a free trial.·² ¿²²»¨ Þ ±² ¿ °±--·¾´» ¬»-¬ ½®·¬»®·¿ô ·² ¬¸·- -¬¿²¼¿®¼ ±²´§ -±³» ·²º±®³¿¬·±² ¹·ª»² °®±½»¼«®»ò ̸» °®±±º ¬¸¿¬ ¬¸» ¼»-·¹² ·- ¿¼»¯«¿¬» ·- ´»º¬ ¬± ¬¸» ³¿²«º¿½¬«®»®ò

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ÒÑÌÛ Ì¸» ¼»-·¹² -¸±«´¼ ¾» °¿®¬·½«´¿®´§ »¨¿³·²»¼ ©·¬¸ ®»-°»½¬ ¬± ·²¬»®²¿´ -¸·»´¼- ¿²¼ ½±²²»½¬·±²- ½¿®®§·²¹ ¬®¿²-·»²¬ ½«®®»²¬-ò

5.1.3

Between-section insulation requirements

Ú±® °®·³¿®§ ¿²¼ -»½±²¼¿®§ ©·²¼·²¹- ¼·ª·¼»¼ ·² ¬©± ±® ³±®» -»½¬·±²-ô ¬¸» ®¿¬»¼ °±©»®ó º®»¯«»²½§ ©·¬¸-¬¿²¼ ª±´¬¿¹» ±º ¬¸» ·²-«´¿¬·±² ¾»¬©»»² -»½¬·±²- -¸¿´´ ¾» í µÊ ø ®ò³ò-ò÷ò 5.1.4

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Insulation requirements for secondary windings

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̸» ®¿¬»¼ °±©»®óº®»¯«»²½§ ©·¬¸-¬¿²¼ ª±´¬¿¹» º±® -»½±²¼¿®§ ©·²¼·²¹- ·²-«´¿¬·±² -¸¿´´ ¾» í µÊ ø®ò³ò-ò÷ò

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5.1.6

18678589IEC-60044-1

IEC 60255 - 21-3

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Requirements for the external insulation

5.1.6.1

Pollution

Ú±® ±«¬¼±±® ½«®®»²¬ ¬®¿²-º±®³»®- ©·¬¸ ½»®¿³·½ ·²-«´¿¬±®- -«-½»°¬·¾´» ¬± ½±²¬¿³·²¿¬·±²ô ¬¸» ½®»»°¿¹» ¼·-¬¿²½»- º±® ¹·ª»² °±´´«¬·±² ´»ª»´- ¿®» ¹·ª»² ·² ¬¿¾´» éò

Table 7   Creepage distances Pollution level

Minimum nominal specific creepage distance ³³ñµÊ

Creepage distance Arcing distance

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ο¬·± ±º ¬¸» ½®»»°¿¹» ¼·-¬¿²½» ¾»¬©»»² °¸¿-» ¿²¼ »¿®¬¸ ±ª»® ¬¸» ®ò³ò-ò °¸¿-»ó¬±ó°¸¿-» ª¿´«» ±º ¬¸» ¸·¹¸»-¬ ª±´¬¿¹» º±® ¬¸» »¯«·°³»²¬ ø-»» ×ÛÝ êððéïóï÷ò Ú±® ±¬¸»® ·²º±®³¿¬·±² ¿²¼ ³¿²«º¿½¬«®·²¹ ¬±´»®¿²½»- ±² ¬¸» ½®»»°¿¹» ¼·-¬¿²½»ô -»» ×ÛÝ êðèïëò

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ÒÑÌÛ ï ׬ ·- ®»½±¹²·¦»¼ ¬¸¿¬ ¬¸» °»®º±®³¿²½» ±º -«®º¿½» ·²-«´¿¬·±² ·- ¹®»¿¬´§ ¿ºº»½¬»¼ ¾§ ·²-«´¿¬±® -¸¿°»ò

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ÒÑÌÛ î ײ ª»®§ ´·¹¸¬´§ °±´´«¬»¼ ¿®»¿-ô -°»½·º·½ ²±³·²¿´ ½®»»°¿¹» ¼·-¬¿²½»- ´±©»® ïê ³³ñµÊ ½¿² ¾» «-»¼ ¼»°»²¼·²¹ ±² -»®ª·½» »¨°»®·»²½»ò ïî ³³ñµÊ -»»³- ¬± ¾» ¿ ´±©»® ´·³·¬ò

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ÒÑÌ Û í ײ ½¿-»- ±º »¨½»°¬·±²¿´ °±´´«¬·±² -»ª»®·¬§ô ¿ -°»½·º·½ ²±³·²¿´ ½®»»°¿¹» ¼·-¬¿²½» ±º íï ³³ñµÊ ³¿§ ²±¬ ¾» ¿¼»¯«¿¬»ò Ü»°»²¼·²¹ ±² -»®ª·½» »¨°»®·»²½» ¿²¼ñ±® ±² ´¿¾±®¿¬±®§ ¬»-¬ ®»-«´¬-ô ¿ ¸·¹¸»® ª¿´«» ±º -°»½·º·½ ½®»»°¿¹» ¼·-¬¿²½» ½¿² ¾» «-»¼ô ¾«¬ ·² -±³» ½¿-»- ¬¸» °®¿½¬·½¿¾·´·¬§ ±º  ©¿-¸·²¹ ³¿§ ¸¿ª» ¬± ¾» ½±²-·¼»®»¼ò

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5.1.7

Requirements for radio interference voltage (RIV)

̸·- ®»¯«·®»³»²¬ ¿°°´·»- ¬± ½«®®»²¬ ¬®¿²-º±®³»®- ¸¿ª·²¹ U ³ ·²-«´¿¬»¼ -«¾-¬¿¬·±²-ò

  ïîí µÊ ¬± ¾» ·²-¬¿´´»¼ ·² ¿·®ó

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̸» ®¿¼·± ·²¬»®º»®»²½» ª±´¬¿¹» -¸¿´´ ²±¬ »¨½»»¼ î ëðð Ê ¿¬ ïôï U ³ ñ í « ²¼ »® ¬¸ » ¬ »- ¬ ¿ ²  Useful  Not useful ³»¿-«®·²¹ ½±²¼·¬·±²- ¼»-½®·¾»¼ ·² éòëò 5.1.8

Transmitted overvoltages

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18678589IEC-60044-1

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̧°» ß ·³°«´-» ®»¯«·®»³»²¬ ¿°°´·»- ¬± ½«®®»²¬ ¬®¿²-º±®³»®- º±® ¿·®ó·²-«´¿¬»¼ -«¾-¬¿¬·±²-ô ©¸·´» ·³°«´-» Þ ®»¯«·®»³»²¬ ¿°°´·»- ¬± ½«®®»²¬ ¬®¿²-º±®³»®- ·²-¬¿´´»¼ ·² ¹¿- ·²-«´¿¬»¼ ³»¬¿´ó»²½´±-»¼ -«¾-¬¿¬·±²- øÙ×Í÷ò ̸» ¬®¿²-³·¬¬»¼ ±ª»®ª±´¬¿¹» °»¿µ ´·³·¬- ¹·ª»² ·² ¬¿¾´» ïê ¿²¼ ³»¿-«®»¼ ·² ¿½½±®¼¿²½» ©·¬¸ ¬¸» ³»¬¸±¼- -°»½·º·»¼ ·² çòìô -¸±«´¼ »²-«®» -«ºº·½·»²¬ °®±¬»½¬·±² ±º »´»½¬®±²·½ »¯«·°³»²¬ ½±²²»½¬»¼ ¬± ¬¸» -»½±²¼¿®§ ©·²¼·²¹ò Table 16   Transmitted overvoltage limits Type of impulse

A

л¿µ ª¿´«» ±º ¬¸» ¿°°´·»¼ ª±´¬¿¹» ø U °÷

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5.2

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Mechanical requirements

̸»-» ®»¯«·®»³»²¬- ¿°°´§ ±²´§ ¬±You're ½«®®»²¬Reading ¬®¿²-º±®³»®¸¿ª·²¹ ¿ ¸·¹¸»-¬ ª±´¬¿¹» º±® »¯«·°³»²¬ a Preview ±º éîôë µÊ ¿²¼ ¿¾±ª»ò

Unlock full access with a free trial. ײ ¬¿¾´» è ¹«·¼¿²½» ·- ¹·ª»² ±² ¬¸» -¬¿¬·½ ´±¿¼- ¬¸¿¬ ½«®®»²¬ ¬®¿²-º±®³»®- -¸¿´´ ¾» ½¿°¿¾´» ©·¬¸-¬¿²¼·²¹ò ̸» º·¹«®»- ·²½´«¼» ´±¿¼- ¼«» ¬± ©·²¼ ¿²¼ ·½»ò

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̸» -°»½·º·»¼ ¬»-¬ ´±¿¼- ¿®» ·²¬»²¼»¼ ¬± ¾» ¿°°´·»¼ ·² ¿²§ ¼·®»½¬·±² ¬± ¬¸» °®·³¿®§ ¬»®³·²¿´Table 8   Static withstand test loads Highest voltage for  equipment U m µÊ

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Static withstand loads F R

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6

18678589IEC-60044-1

IEC 60255 - 21-3

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Classificati on of tests

̸» ¬»-¬- -°»½·º·»¼ ·² ¬¸·- -¬¿²¼¿®¼ ¿®» ½´¿--·º·»¼ ¿- ¬§°» ¬»-¬-ô ®±«¬·²» ¬»-¬-ô ¿²¼ -°»½·¿´ ¬»-¬-ò Type test   ß ¬»-¬ ³¿¼» ±² ¿ ¬®¿²-º±®³ »® ±º »¿½¸ ¬§°» ¬± ¼»³±²-¬ ®¿¬» ¬¸¿¬ ¿´´ ¬®¿²-º±®³ »®- ³¿¼ » ¬± ¬¸» -¿³» -°»½·º·½¿¬·±² ½±³°´§ ©·¬¸ ¬¸» ®»¯«·®»³»²¬- ²±¬ ½±ª»®»¼ ¾§ ®±«¬·²» ¬»-¬-ò ÒÑÌÛ ß ¬§°» ¬»-¬ ³¿§ ¿´-± ¾» ½±²-·¼»®»¼ ª¿´·¼ ·º ·¬ ·- ³¿¼» ±² ¿ ¬®¿²-º±®³»® ©¸·½¸ ¸¿- ³·²±® ¼»ª·¿¬·±²-ò Í«½¸ ¼»ª·¿¬·±²- -¸±«´¼ ¾» -«¾¶»½¬ ¬± ¿¹®»»³»²¬ ¾»¬©»»² ³¿²«º¿½¬ «®»® ¿²¼ °«®½¸¿-»®ò

Routine test   ß ¬»-¬ ¬± ©¸ ·½¸ »¿½¸ ·²¼· ª·¼« ¿´ ¬®¿²-º±®³ »® ·- - «¾¶»½¬» ¼ò Special test   ß ¬»-¬ ± ¬¸»® ¬¸¿² ¿ ¬§°» ¬»-¬ ±® ¿ ®±«¬·²» ¬»-¬ô ¿¹®»»¼ ±² ¾ § ³¿²«º¿½¬« ®»® ¿²¼ °«®½¸¿-»®ò 6.1

Type tests

̸» º±´´±©·²¹ ¬»-¬- ¿®» ¬§°» ¬»-¬-å º±® ¼»¬¿·´- ®»º»®»²½» -¸±«´¼ ¾» ³¿¼» ¬± ¬¸» ®»´»ª¿²¬ -«¾½´¿«-»-æ ¿÷ -¸±®¬ó¬·³» ½«®®»²¬ ¬»-¬- ø-»» éòï÷å ¾÷ ¬»³°»®¿¬«®» ®·-» ¬»-¬ ø-»» éòî÷å You're Reading a

Preview

½÷ ´·¹¸¬²·²¹ ·³°«´-» ¬»-¬ ø-»» éòíòî÷å Unlock full access with a free trial. ¼÷ -©·¬½¸·²¹ ·³°«´-» ¬»-¬ ø-»» éòíòí÷å »÷ ©»¬ ¬»-¬ º±® ±«¬¼±±® ¬§°» ¬®¿²-º±®³»®- ø-»» éòì÷å º÷

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¼»¬»®³·²¿¬·±² ±º »®®±®- ø-»» ïïòì ¿²¼ñ±® ïîòìô ïïòêô ïîòë ¿²¼ ïìòí÷ò

¹÷ ®¿¼·± ·²¬»®º»®»²½» ª±´¬¿¹» ³»¿-«®»³»²¬ øÎ×Ê÷ ø-»» éòë÷ò  ß´´ ¬¸» ¼·»´»½¬ ®·½ ¬§°» ¬»-¬- -¸±« ´¼ ¾» ½¿®®·» ¼ ±«¬ ±² ¬¸» -¿³» ¬®¿²-º±®³ »®ô «²´» -- ±¬¸» ®©·-» -°»½·º·»¼ò  ßº¬» ® ¬®¿²-º ±®³ »®- ¸¿ª» ¾»»² -«¾¶»½¬»¼ ¬± ¬¸» ¼·»´ »½¬® ·½ ¬§°» ¬»-¬ - ±º êòïô ¬¸»§  -¸¿´ ´ ¾» Sign up to vote on this title -«¾¶»½¬»¼ ¬± ¿´´ ¬¸» ®±«¬·²» ¬»-¬- ±º êòîò

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6.2

Routine tests

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18678589IEC-60044-1

IEC 60255 - 21-3

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λ°»¿¬»¼ °±©»®óº®»¯«»²½§ ¬»-¬- ±² °®·³¿®§ ©·²¼·²¹- -¸±«´¼ ¾» °»®º±®³»¼ ¿¬ èð û ±º ¬¸» -°»½·º·»¼ ¬»-¬ ª±´¬¿¹»ò 6.3

Special tests

̸» º±´´±©·²¹ ¬»-¬- ¿®» °»®º±®³»¼ «°±² ¿¹®»»³»²¬ ¾»¬©»»² ³¿²«º¿½¬«®»® ¿²¼ °«® ½¸¿-»®æ ó ó À    ô À    ô   ô   ô À    ô À    ô   ô   ô À    ô À    ô À  À    ô   ô   ô   ô À    ô À  À  À    ô À    ô ó À  ó À    ô   ô À    ô   ô À    ô À    ô   ô À  ó ó ó

¿÷ ½¸±°°»¼ ´·¹¸¬²·²¹ ·³°«´-» ¬»-¬ ø-»» çòï÷å ¾÷ ³»¿-«®»³»²¬ ±º ½¿°¿½·¬¿²½» ¿²¼ ¼·»´»½¬®·½ ¼·--·°¿¬·±² º¿½¬±® ø-»» çòî÷å ½÷ ³«´¬·°´» ½¸±°°»¼ ·³°«´-» ¬»-¬ ±² °®·³¿®§ ©·²¼·²¹ ø-»» ¿²²»¨ Þ÷å ¼÷ ³»½¸¿²·½¿´ ¬»-¬- ø-»» çòí÷ò »÷ ³»¿-«®»³»²¬ ±º ¬®¿²-³·¬¬»¼ ±ª»®ª±´¬¿¹»- ø-»» çòì÷

7 7.1

Type tests Short-time current tests

Ú±® ¬¸» ¬¸»®³¿´ -¸±®¬ó¬·³» ½«®®»²¬ I ¬¸   ¬»-¬ô ¬¸» ¬®¿²-º±®³»® -¸¿´´ ·²·¬·¿´´§ ¾» ¿¬ ¿ ¬»³°»®¿¬«®» ¾»¬©»»² ïð pÝ ¿²¼ ìð pÝò ̸·- ¬»-¬ -¸¿´´ ¾» ³¿¼» ©·¬¸ ¬¸» -»½±²¼¿®§ ©·²¼·²¹ø-÷ -¸±®¬ó½·®½«·¬»¼ô ¿²¼ ¿¬ ¿ ½«®®»²¬ I   º±® ¿ î î ¬·³» t ô -± ¬¸¿¬ øI  t ÷ ·- ²±¬ ´»-- ¬¸¿² ø I  ¬¸ ÷ ¿²¼ °®±ª·¼»¼ t  ¸¿- ¿ ª¿´«» ¾»¬©»»² ðôë - ¿²¼ ë -ò

Reading a Preview ̸» ¼§²¿³·½ ¬»-¬ -¸¿´´ ¾» ³¿¼»You're ©·¬¸ ¬¸» -»½±²¼¿®§ ©·²¼·²¹ø-÷ -¸±®¬ó½·®½«·¬»¼ô ¿²¼ ©·¬¸ ¿ °®·³¿®§ ½«®®»²¬ ¬¸» °»¿µ ª¿´«» ±º ©¸·½¸ ·- ²±¬ ´»-- ¬¸¿² ¬¸» ®¿¬»¼ ¼§²¿³·½ ½«®®»²¬ ø I ¼§² ÷ º±® ¿¬ Unlock full access with a free trial. ´»¿-¬ ±²» °»¿µò ̸» ¼§²¿³·½ ¬»-¬ ³¿§ ¾» ½±³¾·²»¼ ©·¬¸ ¬¸» ¬¸»®³¿´ ¬»-¬ ¿¾±ª»ô °®±ª·¼»¼ ¬¸» º·®-¬ ³¿¶±® °»¿µ With Free Trialø I  ÷ò ½«®®»²¬ ±º ¬¸¿¬ ¬»-¬ ·- ²±¬ ´»-- ¬¸¿²Download ¬¸» ®¿¬»¼ ¼§²¿³·½ ½«®®»²¬ ¼§² ̸» ¬®¿²-º±®³»® -¸¿´´ ¾» ¼»»³»¼ ¬± ¸¿ª» °¿--»¼ ¬¸»-» ¬»-¬- ·ºô ¿º¬»® ½±±´·²¹ ¬± ¿³¾·»²¬ ¬»³°»®¿¬«®» ø¾»¬©»»² ïð pÝ ¿²¼ ìð pÝ÷ô ·¬ -¿¬·-º·»- ¬¸» º±´´±©·²¹ ®»¯«·®»³»²¬-æ ¿÷ ·¬ ·- ²±¬ ª·-·¾´§ ¼¿³¿¹»¼å ¾÷ ·¬- »®®±®- ¿º¬»® ¼»³¿¹²»¬·¦¿¬·±² ¼± ²±¬ ¼·ºº»® º®±³ ¬¸±-» ®»½±®¼»¼ ¾»º±®» ¬¸» ¬»-¬-  ¾§ ³±®» Sign up to vote on this title ¬¸¿² ¸¿´º ¬¸» ´·³·¬- ±º »®®±® ¿°°®±°®·¿¬» ¬± ·¬- ¿½½«®¿½§ ½´¿--å

Not¬¸» useful ½÷ ·¬ ©·¬¸-¬¿²¼- ¬¸» ¼·»´»½¬®·½ ¬»-¬- -°»½·º·»¼ ·² èòîô èòí ¿²¼Useful èòìô ¾«¬ ©·¬¸ ¬»-¬ ª±´¬¿¹»- ±®  ½«®®»²¬- ®»¼«½»¼ ¬± çð û ±º ¬¸±-» ¹·ª»²å ¼÷ ±² »¨¿³·²¿¬·±²ô ¬¸» ·²-«´¿¬·±² ²»¨¬ ¬± ¬¸» -«®º¿½» ±º ¬¸» ½±²¼«½¬±® ¼±»- ²±¬ -¸±©

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

7.2

18678589IEC-60044-1

IEC 60255 - 21-3

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Š ëï Š

Temperature-rise test

 ß ¬ »-¬ -¸¿´´ ¾» ³¿¼» ¬± °®± ª» ½±³°´·¿²½» ©·¬¸ ¬¸» ®»¯«·® »³»²¬- ±º ìòêò Ú±® ¬¸» °«®°±-» ±º ¬¸·¬»-¬ô ½«®®»²¬ ¬®¿²-º±®³»®- -¸¿´´ ¾» ¼»»³»¼ ¬± ¸¿ª» ¿¬¬¿·²»¼ ¿ -¬»¿¼§ ¬»³°»®¿¬«®» ©¸»² ¬¸» ®¿¬» ±º ¬»³°»®¿¬«®» ®·-» ¼±»- ²±¬ »¨½»»¼ ï Õ °»® ¸±«®ò ̸» ¬»-¬ó-·¬» ¿³¾·»²¬ ¬»³°»®¿¬«®» -¸¿´´ ¾» ¾»¬©»»² ïð pÝ ¿²¼ íð pÝò Ú±® ¬¸» ¬»-¬ô ¬¸» ¬®¿²-º±®³»®- -¸¿´´ ¾» ³±«²¬»¼ ·² ¿ ³¿²²»® ®»°®»-»²¬¿¬·ª» ±º ¬¸» ³±«²¬·²¹ ·² -»®ª·½»ò ̸» ¬»³°»®¿¬«®» ®·-» ±º ©·²¼·²¹- -¸¿´´ô ©¸»² °®¿½¬·½¿¾´»ô ¾» ³»¿-«®»¼ ¾§ ¬¸» ·²½®»¿-» ·² ®»-·-¬¿²½» ³»¬¸±¼ô ¾«¬ º±® ©·²¼·²¹- ±º ª»®§ ´±© ®»-·-¬¿²½»ô ¬¸»®³±½±«°´»- ³¿§ ¾» »³°´±§»¼ò ̸» ¬»³°»®¿¬«®» ®·-» ±º °¿®¬- ±¬¸»® ¬¸¿² ©·²¼·²¹- ³¿§ ¾» ³»¿-«®»¼ ¾§ ¬¸»®³±³»¬»®- ±®  ¬¸»®³±½±«°´»-ò 7.3 7.3.1

Impulse tests on primary winding General

̸» ·³°«´-» ¬»-¬ -¸¿´´ ¾» °»®º±®³»¼ ·² ¿½½±®¼¿²½» ©·¬¸ ×ÛÝ êððêðóïò ̸» ¬»-¬ ª±´¬¿¹» -¸¿´´ ¾» ¿°°´·»¼ ¾»¬©»»² ¬¸» ¬»®³·²¿´- ±º ¬¸» °®·³¿®§ ©·²¼·²¹ ø½±²²»½¬»¼ ¬±¹»¬¸»®÷ ¿²¼ »¿®¬¸ò ̸» º®¿³»ô ½¿-» ø·º ¿²§÷ô ¿²¼ ½±®» ø·º ·²¬»²¼»¼ ¬± ¾» »¿®¬¸»¼÷ ¿²¼ ¿´´ You're Reading a Preview ¬»®³·²¿´- ±º ¬¸» -»½±²¼¿®§ ©·²¼·²¹ø-÷ -¸¿´´ ¾» ½±²²»½¬»¼ ¬± »¿®¬¸ò

Unlock full access with a free trial. ̸» ·³°«´-» ¬»-¬- ¹»²»®¿´´§ ½±²-·-¬ ±º ª±´¬¿¹» ¿°°´·½¿¬·±² ¿¬ ®»º»®»²½» ¿²¼ ®¿¬»¼ ª±´¬¿¹» ´»ª»´-ò ̸» ®»º»®»²½» ·³°«´-» ª±´¬¿¹» -¸¿´´ ¾» ¾»¬©»»² ëð û ¿²¼ éë û ±º ¬¸» ®¿¬»¼ ·³°«´-» ©·¬¸-¬¿²¼ ª±´¬¿¹»ò ̸» °»¿µ ª¿´«» ¿²¼ ¬¸» ©¿ª»-¸¿°» ¬¸» ·³°«´-» -¸¿´´ ¾» ®»½±®¼»¼ò Download±ºWith Free Trial Ûª·¼»²½» ±º ·²-«´¿¬·±² º¿·´«®» ¼«» ¬± ¬¸» ¬»-¬ ³¿§ ¾» ¹·ª»² ¾§ ª¿®·¿¬·±² ·² ¬¸» ©¿ª»-¸¿°» ¿¬ ¾±¬¸ ®»º»®»²½» ¿²¼ ®¿¬»¼ ©·¬¸-¬¿²¼ ª±´¬¿¹»ò ׳°®±ª»³»²¬- ·² º¿·´«®» ¼»¬»½¬·±² ³¿§ ¾» ±¾¬¿·²»¼ ¾§ ®»½±®¼·²¹ ±º ¬¸» ½«®®»²¬ø-÷ ¬± »¿®¬¸ ¿- ¿ ½±³°´»³»²¬ ¬± ¬¸» ª±´¬¿¹» ®»½±®¼ò

Sign up to vote on this title 7.3.2

Lightning impulse test

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̸» ¬»-¬ ª±´¬¿¹» -¸¿´´ ¸¿ª» ¬¸» ¿°°®±°®·¿¬» ª¿´«»ô ¹·ª»² ·² ¬¿¾´»- í ±® ìô ¼»°»²¼·²¹ ±² ¬¸» ¸·¹¸»-¬ ª±´¬¿¹» º±® »¯«·°³»²¬ ¿²¼ ¬¸» -°»½·º·»¼ ·²-«´¿¬·±² ´»ª»´ò

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18678589IEC-60044-1

IEC 60255 - 21-3

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Š ëí Š

 Š

²± ³±® » ¬¸¿² ¬©± º´¿-¸±ª»®- ±½½« ® ¿ ½®±-- ¬¸» -»´º ó®»-¬±®·² ¹ »¨ ¬»®²¿´ ·²-« ´¿¬· ±²å

 Š

²± ±¬¸» ® »ª·¼»²½» ±º ·²-« ´¿¬·±² º¿· ´«®» ·- ¼»¬» ½¬»¼ ø»ò¹ò ª¿®·¿¬· ±²- ·² ¬¸» ©¿ª»-¸¿°» ±º ¬¸» ®»½±®¼»¼ ¯«¿²¬·¬·»-÷ò

ÒÑÌÛ Ì¸» ¿°°´·½¿¬·±² ±º ïë °±-·¬·ª» ¿²¼ ïë ²»¹¿¬·ª» ·³°«´-»- ·- -°»½·º·»¼ º±® ¬»-¬·²¹ ¬¸» »¨¬»®²¿´ ·²-«´¿¬·±²ò ׺  ±¬¸»® ¬»-¬- ¿®» ¿¹®»»¼ ¾»¬©»»² ³¿²«º¿½¬«®»® ¿²¼ °«®½¸¿-»® ¬± ½¸»½µ ¬¸» »¨¬»®²¿´ ·²-«´¿¬·±²ô ¬¸» ²«³¾»® ±º  ´·¹¸¬²·²¹ ·³°«´-»- ³¿§ ¾» ®»¼«½»¼ ¬± ¬¸®»» ±º »¿½¸ °±´¿®·¬§ô ²±¬ ½±®®»½¬»¼ º±® ¿¬³±-°¸»®·½ ½±²¼·¬·±²-ò

7.3.2.2

Windings having

U m

 300 kV

̸» ¬»-¬ -¸¿´´ ¾» °»®º±®³»¼ ©·¬¸ ¾±¬¸ °±-·¬·ª» ¿²¼ ²»¹¿¬·ª» °±´¿®·¬·»-ò ̸®»» ½±²-»½«¬·ª» ·³°«´-»- ±º »¿½¸ °±´¿®·¬§ô ²±¬ ½±®®»½¬»¼ º±® ¿¬³±-°¸»®·½ ½±²¼·¬·±²-ô -¸¿´´ ¾» ¿°°´·»¼ò ̸» ¬®¿²-º±®³»® °¿--»- ¬¸» ¬»-¬ ·ºæ  Š

²± ¼·-® «°¬· ª» ¼·-½¸¿®¹» ±½½« ®-å

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²± ±¬¸» ® »ª·¼ »²½» ±º ·²-« ´¿¬· ±² º¿·´ «®» ·- ¼»¬» ½¬»¼ ø»ò¹ò ª¿®· ¿¬·± ²- ·² ¬¸» ©¿ª»-¸¿° » ±º ¬¸» ®»½±®¼»¼ ¯«¿²¬·¬·»-÷ò

7.3.3

Switching impulse test

̸» ¬»-¬ ª±´¬¿¹» -¸¿´´ ¸¿ª» ¬¸» ¿°°®±°®·¿¬» ª¿´«»ô ¹·ª»² ·² ¬¿¾´» ìô ¼»°»²¼·²¹ ±² ¬¸» ¸·¹¸»-¬ ª±´¬¿¹» º±® »¯«·°³»²¬ ¿²¼ ¬¸» -°»½·º·»¼ ·²-«´¿¬·±² ´»ª»´ò ̸» ¬»-¬ -¸¿´´ ¾» °»®º±®³»¼ ©·¬¸ °±-·¬·ª» °±´¿®·¬§ò Ú·º¬»»² ½±²-»½«¬·ª» ·³°«´-»-ô ½±®®»½¬»¼ º±®  ¿¬³±-°¸»®·½ ½±²¼·¬·±²-ô -¸¿´´ ¾» ¿°°´·»¼ò

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Ú±® ±«¬¼±±®ó¬§°» ¬®¿²-º±®³»®-ô ¬¸» ¬»-¬ -¸¿´´ ¾» °»®º±®³»¼ «²¼»® ©»¬ ½±²¼·¬·±²- ø-»» éòì÷ò

Unlock full access with a free trial. ̸» ¬®¿²-º±®³»® °¿--»- ¬¸» ¬»-¬ ·ºæ  Š

²± ¼·-® «°¬· ª» ¼·-½¸¿®¹» ±½½« ®- · ² ¬¸» ²±²ó -»´º ó®»-¬± ®·² ¹ ·² ¬»®²¿´ ·²-«´¿¬ ·±²å

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²± ±¬¸» ® »ª·¼»²½» ±º ·²-« ´¿¬·±² º¿· ´«®» ·- ¼»¬» ½¬»¼ ø»ò¹ò ª¿®·¿¬· ±²- ·² ¬¸» ©¿ª»-¸¿°» ±º ¬¸» ®»½±®¼»¼ ¯«¿²¬·¬·»-÷ò

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7.4

׳°«´-»- ©·¬¸ º´¿-¸±ª»® ¬± ¬¸» ©¿´´- ±® ½»·´·²¹- ±º ¬¸» ´¿¾±®¿¬±®§ -¸¿´´ ¾» ¼·-®»¹¿®¼»¼ò

Wet test for outdoor type transformers

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̸» ©»¬¬·²¹ °®±½»¼«®» -¸¿´´ ¾» ·² ¿½½±®¼¿²½» ©·¬¸ ×ÛÝ êððêðóïò

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Ú±® ©·²¼·²¹- ¸¿ª·²¹ U   ä íðð µÊô ¬¸» ¬»-¬ -¸¿´´ ¾» °»®º±®³»¼ ©·¬¸ °±©»® º®»¯«»²½§ ª±´¬¿¹» ±º 

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

7.5

18678589IEC-60044-1

IEC 60255 - 21-3

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Š ëë Š

Radio interference voltage measurement

̸» ½«®®»²¬ ¬®¿²-º±®³»®ô ½±³°´»¬» ©·¬¸ ¿½½»--±®·»-ô -¸¿´´ ¾» ¼®§ ¿²¼ ½´»¿² ¿²¼ ¿¬ ¿°°®±¨·ó ³¿¬»´§ ¬¸» -¿³» ¬»³°»®¿¬«®» ¿- ¬¸» ´¿¾±®¿¬±®§ ®±±³ ·² ©¸·½¸ ¬¸» ¬»-¬ ·- ³¿¼»ò ײ ¿½½±®¼¿²½» ©·¬¸ ¬¸·- -¬¿²¼¿®¼ô ¬¸» ¬»-¬ -¸±«´¼ ¾» °»®º±®³»¼ «²¼»® ¬¸» º±´´±©·²¹ ¿¬³±-°¸»®·½ ½±²¼·¬·±²-æ

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®»´¿¬·ª» ¸«³·¼·¬§ ¾»¬©»»² ìë û ¿²¼ éë ûò

ïðë п ¿²¼ ïôðéð

ïð ë  Ð¿å

ÒÑÌÛ ï Þ§ ¿¹®»»³»²¬ ¾»¬©»»² °«®½¸¿-»® ¿²¼ ³¿²«º¿½¬«®»®ô ¬¸» ¬»-¬- ³¿§ ¾» ½¿®®·»¼ ±«¬ «²¼»® ±¬¸»®  ¿¬³±-°¸»®·½ ½±²¼·¬·±²-ò ÒÑÌÛ î Ò± ½±®®»½¬·±² º¿½¬±®- º±® ¿¬³±-°¸»®·½ ½±²¼·¬·±²- ·² ¿½½±®¼¿²½» ©·¬¸ ×ÛÝ êððêðóï ¿®» ¿°°´·½¿¾´» ¬± ®¿¼·± ·²¬»®º»®»²½» ¬»-¬-ò

̸» ¬»-¬ ½±²²»½¬·±²- ¿²¼ ¬¸»·® »²¼- -¸¿´´ ²±¬ ¾» ¿ -±«®½» ±º ®¿¼·± ·²¬»®º»®»²½» ª±´¬¿¹»ò ͸·»´¼·²¹ ±º °®·³¿®§ ¬»®³·²¿´-ô -·³«´¿¬·²¹ ¬¸» ±°»®¿¬·±² ½±²¼·¬·±²ô -¸±«´¼ ¾» °®±ª·¼»¼ ¬± °®»ª»²¬ -°«®·±«- ¼·-½¸¿®¹»-ò ̸» «-» ±º -»½¬·±²- ±º ¬«¾» ©·¬¸ -°¸»®·½¿´ ¬»®³·²¿¬·±²- ·®»½±³³»²¼»¼ò ̸» ¬»-¬ ª±´¬¿¹» -¸¿´´ ¾» ¿°°´·»¼ ¾»¬©»»² ±²» ±º ¬¸» ¬»®³·²¿´- ±º ¬¸» °®·³¿®§ ©·²¼·²¹ ±º ¬¸» ¬»-¬ ±¾¶»½¬ øC ¿ ÷ ¿²¼ »¿®¬¸ò ̸» º®¿³»ô ½¿-» ø·º ¿²§÷ô ½±®» ø·º ·²¬»²¼»¼ ¬± ¾» »¿®¬¸»¼÷ ¿²¼ ¿´´ ¬»®³·²¿´- ±º ¬¸» -»½±²¼¿®§ ©·²¼·²¹ø-÷ -¸¿´´ ¾» ½±²²»½¬»¼ ¬± »¿®¬¸ò

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

18678589IEC-60044-1

IEC 60255 - 21-3

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Š ëé Š

̸» ½«®®»²¬ ¬®¿²-º±®³»® -¸¿´´ ¾» ½±²-·¼»®»¼ ¬± ¸¿ª» °¿--»¼ ¬¸» ¬»-¬ ·º ¬¸» ®¿¼·± ·²¬»®º»®»²½» ´»ª»´ ¿¬ ïôï U ³ ñ í ¼±»- ²±¬ »¨½»»¼ ¬¸» ´·³·¬ °®»-½®·¾»¼ ·² ëòïòéò ÒÑÌÛ ë Þ§ ¿¹®»»³»²¬ ¾»¬©»»² ³¿²«º¿½¬«®»® ¿²¼ °«®½¸¿-»®ô ¬¸» Î×Ê ¬»-¬ ¿- ¼»-½®·¾»¼ ¿¾±ª» ³¿§ ¾» ®»°´¿½»¼ ¾§ ¿ °¿®¬·¿´ ¼·-½¸¿®¹» ³»¿-«®»³»²¬ ¿°°´§·²¹ ¬¸» °®»ó-¬®»-- ¿²¼ ¬»-¬ ª±´¬¿¹»- -°»½·º·»¼ ¿¾±ª»ò  ß²§ °® »½ ¿« ¬·± ² ¬¿ µ» ² ¼« ®·² ¹ °¿® ¬· ¿´ ¼·- ½¸ ¿® ¹» ³» ¿- «® »³ »² ¬ °» ®º ±®³ »¼ ·² ¿½ ½± ®¼ ¿² ½» ©·¬ ¸ èò îò î º± ® ¿ª ±·¼ ·²¹ »¨¬»®²¿´ ¼·-½¸¿®¹»- ø·ò»ò -¸·»´¼·²¹÷ -¸±«´¼ ¾» ®»³±ª»¼ò ײ ¬¸·- ½ ¿-»ô ¬¸» ¾¿´¿²½»¼ ¬»-¬ ½·®½«·¬ ·- ²±¬ ¿°°®±°®·¿¬»ò  ß´¬ ¸± «¹ ¸ ¬¸ »®» ·- ²± ¼·® »½ ¬ ½± ²ª» ®- ·±² ¾» ¬©» »² Î× Ê ³· ½®± ª± ´¬ - ¿²¼ °¿® ¬·¿ ´ ¼·- ½¸ ¿® ¹» °·½ ±½ ±« ´±³ ¾- ô ¬¸ » ½« ®® »² ¬®¿²-º±®³»® ·- ½±²-·¼»®»¼ ¬± ¸¿ª» °¿--»¼ ¬¸» ¬»-¬ ·º ¿¬ ïôï U ³ñ íðð °Ýò

8

í ¬ ¸ » ° ¿® ¬ ·¿ ´ ¼ ·- ½ ¸¿ ® ¹» ´ » ª» ´ ¼ ±» - ² ± ¬ » ¨½ » »

Routine tests

8.1

Verification of terminal markings

׬ -¸¿´´ ¾» ª»®·º·»¼ ¬¸¿¬ ¬¸» ¬»®³·²¿´ ³¿®µ·²¹- ¿®» ½±®®»½¬ ø-»» ïðòï÷ò 8.2

Power-frequency withstand tests on primary windings and partial discharge measurement

8.2.1

Power-frequency test

̸» °±©»®óº®»¯«»²½§ ©·¬¸-¬¿²¼ ¬»-¬ -¸¿´´ ¾» °»®º±®³»¼ ·² ¿½½±®¼¿²½» ©·¬¸ ×ÛÝ êððêðóïò ̸» ¬»-¬ ª±´¬¿¹» -¸¿´´ ¸¿ª» ¬¸» You're ¿°°®±°®·¿¬» ª¿´«»a Preview ¹·ª»² ·² ¬¿¾´» í ±® ëô ¼»°»²¼·²¹ ±² ¬¸» Reading ¸·¹¸»-¬ ª±´¬¿¹» º±® »¯«·°³»²¬ò ̸» ¼«®¿¬·±² -¸¿´´ ¾» êð -ò

Unlock full access with a free trial. ̸» ¬»-¬ ª±´¬¿¹» -¸¿´´ ¾» ¿°°´·»¼ ¾»¬©»»² ¬¸» -¸±®¬ó½·®½«·¬»¼ °®·³¿®§ ©·²¼·²¹ ¿²¼ »¿®¬¸ò ̸» -¸±®¬ó½·®½«·¬»¼ -»½±²¼¿®§ ©·²¼·²¹ø-÷ô ¬¸» º®¿³»ô ½¿-» ø·º ¿²§÷ ¿²¼ ½±®» ø·º ¬¸»®» ·- ¿ -°»½·¿´ »¿®¬¸ ¬»®³·²¿´÷ -¸¿´´ ¾» ½±²²»½¬»¼Download ¬± »¿®¬¸ò With Free Trial 8.2.2 8.2.2.1 ó ó À    ô À    ô   ô   ô À    ô À    ô   ô   ô À    ô À    ô À  À    ô   ô   ô   ô À    ô À  À  À    ô À    ô ó

Partial discharge measurement Test circuit and instrumentation

̸» ¬»-¬ ½·®½«·¬ ¿²¼ ¬¸» ·²-¬®«³»²¬¿¬·±² «-»¼ -¸¿´´ ¾» ·² ¿½½±®¼¿²½» ©·¬¸ ×ÛÝ êðîéðò ͱ³»  »¨¿³°´»- ±º ¬»-¬ ½·®½«·¬- ¿®» -¸±©² ·² º·¹«®»- î ¬± ìò Sign up to vote on this title

Useful ·² Not useful ̸» ·²-¬®«³»²¬ «-»¼ -¸¿´´ ³»¿-«®» ¬¸» ¿°°¿®»²¬ ½¸¿®¹» q »¨°®»--»¼ °·½±½±«´±³¾ ø°Ý÷ò ׬½¿´·¾®¿¬·±² -¸¿´´ ¾» °»®º±®³»¼ ·² ¬¸» ¬»-¬ ½·®½«·¬ ø-»» ¿² »¨¿³°´» ·² º·¹«®» ë÷ò  ß ©·¼»ó¾¿²¼ ·²-¬®«

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

8.2.2.2

ó ó À    ô À    ô   ô   ô À    ô À    ô   ô   ô À    ô À    ô À  À    ô   ô   ô   ô À    ô À  À  À    ô À    ô ó À  ó À    ô   ô À    ô   ô À    ô À    ô   ô À  ó ó ó

18678589IEC-60044-1

IEC 60255 - 21-3

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Š ëç Š

Partial discharge test procedure

 ßº¬» ® ¿ °®» -¬®» --·²¹ °»® º±® ³»¼ ¿½½±®¼·²¹ ¬± °®±½»¼«®»- ß ±® Þô ¬¸» °¿®¬ ·¿´ ¼·-½ ¸¿® ¹» ¬»-¬ ª±´¬¿¹»- -°»½·º·»¼ ·² ¬¿¾´» ê ¿®» ®»¿½¸»¼ô ¿²¼ ¬¸» ½±®®»-°±²¼·²¹ °¿®¬·¿´ ¼·-½¸¿®¹» ´»ª»´- ¿®» ³»¿-«®»¼ ·² ¿ ¬·³» ©·¬¸·² íð -ò ̸» ³»¿-«®»¼ °¿®¬·¿´ ¼·-½¸¿®¹» -¸¿´´ ²±¬ »¨½»»¼ ¬¸» ´·³·¬- -°»½·º·»¼ ·² ¬¿¾´» êò Ю±½»¼«®» ßæ ¬¸» °¿®¬·¿´ ¼·-½¸¿®¹» ¬»-¬ ª±´¬¿¹»- ¿®» ®»¿½¸»¼ ©¸·´» ¼»½®»¿-·²¹ ¬¸» ª±´¬¿¹» ¿º¬»®  ¬¸» °±©»®óº®»¯«»²½§ ©·¬¸-¬¿²¼ ¬»-¬ò Ю±½»¼«®» Þæ ¬¸» °¿®¬·¿´ ¼·-½¸¿®¹» ¬»-¬ ·- °»®º±®³»¼ ¿º¬»® ¬¸» °±©»®óº®»¯«»²½§ ©·¬¸-¬¿²¼ ¬»-¬ò ̸» ¿°°´·»¼ ª±´¬¿¹» ·- ®¿·-»¼ ¬± èð û ±º ¬¸» °±©»®óº®»¯«»²½§ ©·¬¸-¬¿²¼ ª±´¬¿¹»ô ³¿·²¬¿·²»¼ º±®  ²±¬ ´»-- ¬¸¿² êð -ô ¬¸»² ®»¼«½»¼ ©·¬¸±«¬ ·²¬»®®«°¬·±² ¬± ¬¸» -°»½·º·»¼ °¿®¬·¿´ ¼·-½¸¿®¹» ¬»-¬ ª±´¬¿¹»-ò ׺ ²±¬ ±¬¸»®©·-» -°»½·º·»¼ô ¬¸» ½¸±·½» ±º ¬¸» °®±½»¼«®» ·- ´»º¬ ¬± ¬¸» ³¿²«º¿½¬«®»®ò ̸» ¬»-¬ ³»¬¸±¼ «-»¼ -¸¿´´ ¾» ·²¼·½¿¬»¼ ·² ¬¸» ¬»-¬ ®»°±®¬ò 8.3

Power-frequency withstand tests between sections of primary and secondary windings and on secondary windings

̸» ¬»-¬ ª±´¬¿¹»ô ©·¬¸ ¬¸» ¿°°®±°®·¿¬» ª¿´«» ¹·ª»² ·² ëòïòí ¿²¼ ëòïòì ®»-°»½¬·ª»´§ -¸¿´´ ¾» ¿°°´·»¼ º±® êð - ·² ¬«®² ¾»¬©»»² ¬¸» -¸±®¬ó½·®½«·¬»¼ ¬»®³·²¿´- ±º »¿½¸ ©·²¼·²¹ -»½¬·±²ô ±® »¿½¸ -»½±²¼¿®§ ©·²¼·²¹ ¿²¼ »¿®¬¸ò

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̸» º®¿³»ô ½¿-» ø·º ¿²§÷ô ½±®» ø·º ¬¸»®» ·- ¿ -°»½·¿´ »¿®¬¸ ¬»®³·²¿´÷ô ¿²¼ ¬¸» ¬»®³·²¿´- ±º ¿´´ ¬¸» Unlock full access with a free trial. ±¬¸»® ©·²¼·²¹- ±® -»½¬·±²- -¸¿´´ ¾» ½±²²»½¬»¼ ¬±¹»¬¸»® ¿²¼ ¬± »¿®¬¸ò 8.4

Inter-turn overvoltage test Download

With Free Trial

̸» ·²¬»®ó¬«®² ±ª»®ª±´¬¿¹» ¬»-¬ -¸¿´´ ¾» °»®º±®³»¼ ·² ¿½½±®¼¿²½» ©·¬¸ ±²» ±º ¬¸» º±´´±©·²¹ °®±½»¼«®»-ò ׺ ²±¬ ±¬¸»®©·-» ¿¹®»»¼ô ¬¸» ½¸±·½» ±º ¬¸» °®±½»¼«®» ·- ´»º¬ ¬± ¬¸» ³¿²«º¿½¬«®»®ò Ю±½»¼«®» ßæ ©·¬¸ ¬¸» -»½±²¼¿®§ ©·²¼·²¹- ±°»²ó½·®½«·¬»¼ ø±® ½±²²»½¬»¼ ¬± ¿ ¸·¹¸ ·³°»¼¿²½»  ¼»ª·½» ©¸·½¸ ®»¿¼- °»¿µ ª±´¬¿¹»÷ô ¿ -«¾-¬¿²¬·¿´´§ -·²«-±·¼¿´ ¿¬ ¿ on º®»¯«»²½§ Sign½«®®»²¬ up to vote this title ¾»¬©»»² ìð ئ ¿²¼ êð ئ ø·² ¿½½±®¼¿²½» ©·¬¸ ×ÛÝ êððêðóï÷ ¿²¼ ±º ®ò³ò-ò ª¿´«» »¯«¿´ ¬± ¬¸» ®¿¬»¼ °®·³¿®§ Useful -¸¿´´ Not ¾» useful  ¿°°´·½¿¾´»÷ ½«®®»²¬ ø±® ®¿¬»¼ »¨¬»²¼»¼ °®·³¿®§ ½«®®»²¬ ø -»» ïïòí÷ ©¸»² ¿°°´·»¼ º±® ê𠬱 ¬¸» °®·³¿®§ ©·²¼·²¹ò

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

18678589IEC-60044-1

IEC 60255 - 21-3

 Search document



Š êï Š

ɸ»² ¬¸» º®»¯«»²½§ »¨½»»¼- ¬©·½» ¬¸» ®¿¬»¼ º®»¯«»²½§ô ¬¸» ¼«®¿¬·±² ±º ¬¸» ¬»-¬ ³¿§ ¾» ®»¼«½»¼ º®±³ êð - ¿- ¾»´±©æ ¼«®¿¬·±²±º ¬»-¬ ø·²-÷

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©·¬¸ ¿ ³·²·³«³ ±º ïë -ò ÒÑÌÛ Ì¸» ·²¬»®ó¬«®² ±ª»®ª±´¬¿¹» ¬»-¬ ·- ²±¬ ¿ ¬»-¬ ½¿®®·»¼ ±«¬ ¬± ª»®·º§ ¬¸» -«·¬¿¾·´·¬§ ±º ¿ ½«®®»²¬ ¬®¿²-º±®³»® ¬± ±°»®¿¬» ©·¬¸ ¬¸» -»½±²¼¿®§ ©·²¼·²¹ ±°»²ó½·®½«·¬»¼ò Ý«®®»²¬ ¬®¿²-º±®³»®- -¸±«´¼ ²±¬ ¾» ±°»®¿¬»¼ ©·¬¸ ¬¸» -»½±²¼¿®§ ©·²¼·²¹ ±°»²ó½·®½«·¬»¼ ¾»½¿«-» ±º ¬¸» °±¬»²¬·¿´´§ ¼¿²¹»®±«- ±ª»®ª±´¬¿¹»- ¿²¼ ±ª»®¸»¿¬·²¹ ©¸·½¸ ½¿² ±½½«®ò

9

Special tests

9.1

Chopped impulse test on primary winding

̸» ¬»-¬ -¸¿´´ ¾» ½¿®®·»¼ ±«¬ ©·¬¸ ²»¹¿¬·ª» °±´¿®·¬§ ±²´§ô ¿²¼ ¾» ½±³¾·²»¼ ©·¬¸ ¬¸» ²»¹¿¬·ª» °±´¿®·¬§ ´·¹¸¬²·²¹ ·³°«´-» ¬»-¬ ·² ¬¸» ³¿²²»® ¼»-½®·¾»¼ ¾»´±©ò ̸» ª±´¬¿¹» -¸¿´´ ¾» ¿ -¬¿²¼¿®¼ ´·¹¸¬²·²¹ ·³°«´-»ô ½¸±°°»¼ ¾»¬©»»² î k- ¿²¼ ë k-ò ̸» ½¸±°°·²¹ ½·®½«·¬ -¸¿´´ ¾» -± ¿®®¿²¹»¼ ¬¸¿¬ ¬¸» ¿³°´·¬«¼» ±º ±ª»®-©·²¹ ±º ±°°±-·¬» °±´¿®·¬§ ±º ¬¸» ¿½¬«¿´ ¬»-¬ ·³°«´-» -¸¿´´ ¾» ´·³·¬»¼ ¬± ¿°°®±¨·³¿¬»´§ íð û ±º ¬¸» °»¿µ ª¿´«»ò Ì ¸» ¬»-¬ ª±´¬¿¹» ±º  ¬¸» º«´´ ·³°«´-»- -¸¿´´ ¸¿ª» ¬¸» ¿°°®±°®·¿¬» ª¿´«»ô ¹·ª»² ·² ¬¿¾´»- í ±® ìô ¼»°»²¼·²¹ ±² ¬¸» ¸·¹¸»-¬ ª±´¬¿¹» º±® »¯«·°³»²¬ ¿²¼ ¬¸» -°»½·º·»¼ ·²-«´¿¬·±² ´»ª»´ò ̸» ½¸±°°»¼ ·³°«´-» ¬»-¬ ª±´¬¿¹» -¸¿´´ ¾» ·² ¿½½±®¼¿²½» ©·¬¸ ëòïòîòíò

You're Reading a Preview

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18678589IEC-60044-1

IEC 60255 - 21-3

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̸» ¬»-¬ -¸¿´´ ¾» °»®º±®³»¼ ©·¬¸ ¬¸» ½«®®»²¬ ¬®¿²-º±®³»® ¿¬ ¿³¾·»²¬ ¬»³°»®¿¬«®»ô ¬¸» ª¿´«» ±º  ©¸·½¸ -¸¿´´ ¾» ®»½±®¼»¼ò 9.3

Mechanical tests

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

9.4

18678589IEC-60044-1

IEC 60255 - 21-3

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Š êë Š

Transmitted overvoltages measurement

 ß ´±©óª±´¬¿¹» · ³°«´-» øU ï ÷ -¸¿´´ ¾» ¿°°´·»¼ ¾»¬©»»² ±²» ±º ¬¸» °®·³¿®§ ¬»®³·²¿´- ¿²¼ »¿®¬¸ò Ú±® -·²¹´»ó°¸¿-» ½«®®»²¬ ¬®¿²-º±®³»®- º±® Ù×Í ³»¬¿´ó»²½´±-»¼ -«¾-¬¿¬·±²-ô ¬¸» ·³°«´-» -¸¿´´ ¾» ¿°°´·»¼ ¬¸®±«¹¸ ¿ ëð ½±¿¨·¿´ ½¿¾´» ¿¼¿°¬»® ¿½½±®¼·²¹ ¬± º·¹«®» éò ̸» »²½´±-«®» ±º ¬¸» Ù× -»½¬·±² -¸¿´´ ¾» ½±²²»½¬»¼ ¬± »¿®¬¸ ¿- °´¿²²»¼ ·² -»®ª·½»ò Ú±® ±¬¸»® ¿°°´·½¿¬·±²-ô ¬¸» ¬»-¬ ½·®½«·¬ -¸¿´´ ¾» ¿- ¼»-½®·¾»¼ ·² º·¹«®» èò ̸» ¬»®³·²¿´ø-÷ ±º ¬¸» -»½±²¼¿®§ ©·²¼·²¹ø-÷ ·²¬»²¼»¼ ¬± ¾» »¿®¬¸»¼ -¸¿´´ ¾» ½±²²»½¬»¼ ¬± ¬¸» º®¿³» ¿²¼ ¬± »¿®¬¸ò ̸» ¬®¿²-³·¬¬»¼ ª±´¬¿¹» øU î ÷ -¸¿´´ ¾» ³»¿-«®»¼ ¿¬ ¬¸» ±°»² -»½±²¼¿®§ ¬»®³·²¿´- ¬¸®±«¹¸ ¿ ëð ½±¿¨·¿´ ½¿¾´» ¬»®³·²¿¬»¼ ©·¬¸ ¬¸» ëð ·²°«¬ ·³°»¼¿²½» ±º ¿² ±-½·´´±-½±°» ¸¿ª·²¹ ¾¿²¼©·¼¬¸ ±º ïðð Óئ ±® ¸·¹¸»® ©¸·½¸ ®»¿¼- ¬¸» °»¿µ ª¿´«»ò ÒÑÌÛ Ñ¬¸»® ¬»-¬ ³»¬¸±¼- ¬± ¿ª±·¼ ¬¸» ·²¬®«-·±² ±º ¬¸» ·²-¬®«³»²¬¿¬·±² ³¿§ ¾» ¿¹®»»¼ ¾»¬©»»² ³¿²«º¿½¬«®»® ¿²¼ °«®½¸¿-»®ò

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10 Markings

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

18678589IEC-60044-1

IEC 60255 - 21-3

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Š êé Š

10.1.1 Method of marking ̸» ¬»®³·²¿´- -¸¿´´ ¾» ³¿®µ»¼ ½´»¿®´§ ¿²¼ ·²¼»´·¾´§ô »·¬¸»® ±² ¬¸»·® -«®º¿½» ±® ·² ¬¸»·® ·³³ »¼·¿¬» ª·½·²·¬§ò ̸» ³¿®µ·²¹ -¸¿´´ ½±²-·-¬ ±º ´»¬¬»®- º±´´±©»¼ô ±® °®»½»¼»¼ ©¸»®» ²»½»--¿®§ô ¾§ ²«³¾»®-ò ̸» ´»¬¬»®- -¸¿´´ ¾» ·² ¾´±½µ ½¿°·¬¿´-ò 10.1.2 Markings to be used ̸» ³¿®µ·²¹- ±º ½«®®»²¬ ¬®¿²-º±®³ »® ¬»®³·²¿´- -¸¿´´ ¾» ¿- ·²¼·½¿¬»¼ ·² ¬¸» º±´´±©·²¹ ¬¿¾´» ïðò Table 10   Markings of terminals Ðï

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10.1.3 Indication of relative polarities

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

18678589IEC-60044-1

IEC 60255 - 21-3

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»÷ ¬¸» ®¿¬»¼ ±«¬°«¬ ¿²¼ ¬¸» ½±®®»-°±²¼·²¹ ¿½½«®¿½§ ½´¿--ô ¬±¹»¬¸»® ©·¬¸ ¿¼¼·¬·±²¿´ ·²º±®³¿¬·±² -°»½·º·»¼ ·² ¬¸» ´¿¬»® °¿®¬- ±º ¬¸»-» ®»½±³³»²¼¿¬·±²- ø-»» ïïòé ¿²¼ñ±® ïîòéô ïíòë ¿²¼ ïìòë÷å ÒÑÌÛ É¸»®» ¿°°®±°®·¿¬»ô ¬¸» ½¿¬»¹±®§ ±º -»½±²¼¿®§ ©·²¼·²¹ -¸±«´¼ ¾» ³¿®µ»¼ ø»ò¹ò ïÍô ïë Êßô ½´¿-- ðòëå îÍô íð Êßô ½´¿-- ï÷ò

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11 Additional requirements for measuring current transformers 11.1

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Accuracy class designation for measuring current transformers

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11.1.1 Standard accuracy classes

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Limits of current error and phase displacement for measuring Sign up to vote on this title current transformers

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18678589IEC-60044-1

IEC 60255 - 21-3

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

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Ú±® ½«®®»²¬ ¬®¿²-º±®³»®- ±º ¿½½«®¿½§ ½´¿-- ðôï ó ðôî ó ðôî Í ¿²¼ ¸¿ª·²¹ ¿ ®¿¬»¼ ¾«®¼»² ²±¬ »¨½»»¼·²¹ ïë Êßô ¿² »¨¬»²¼»¼ ®¿²¹» ±º ¾«®¼»² ½¿² ¾» -°»½·º·»¼ò ̸» ½«®®»²¬ »®®±® ¿²¼ °¸¿-» ¼·-°´¿½»³»²¬ -¸¿´´ ²±¬ »¨½»»¼ ¬¸» ª¿´«»- ¹·ª»² ·² ¬¿¾´» ïï ¬± ïîô ©¸»² ¬¸» -»½±²¼¿®§ ¾«®¼»² ·¿²§ ª¿´«» º®±³ ï Êß ¬± ïðð û ±º ¬¸» ®¿¬»¼ ¾«®¼»²ò Ú±® ½´¿-- í ¿²¼ ½´¿-- ëô ¬¸» ½«®®»²¬ »®®±® ¿¬ ®¿¬»¼ º®»¯«»²½§ -¸¿´´ ²±¬ »¨½»»¼ ¬¸» ª¿´«»- ¹·ª»² ·² ¬¿¾´» ïí ©¸»² ¬¸» -»½±²¼¿®§ ¾«®¼»² ·- ¿²§ ª¿´«» º®±³ ëð û ¬± ïðð û ±º ¬¸» ®¿¬»¼ ¾«®¼»²ò ̸» -»½±²¼¿®§ ¾«®¼»² «-»¼ º±® ¬»-¬ °«®°±-»- -¸¿´´ ¸¿ª» ¿ °±©»®óº¿½¬±® ±º ðôè ´¿¹¹·²¹ »¨½»°¬ ¬¸¿¬ ©¸»² ¬¸» ¾«®¼»² ·- ´»-- ¬¸¿² ë Êßô ¿ °±©»®óº¿½¬±® ±º ïôð -¸¿´´ ¾» «-»¼ò ײ ²± ½¿-» -¸¿´´ ¬¸» ¬»-¬ ¾«®¼»² ¾» ´»-- ¬¸¿² ï Êßò ÒÑÌÛ ï ¿¹®»»¼ò

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ÒÑÌÛ É¸»² ¬¸» ®»¯«·®»³»²¬- ®»º»® ¬± ¸·¹¸»-¬ ¬®¿²-º±®³¿¬·±² ®¿¬·±ô ¬¸» ³¿²«º¿½¬«®»® -¸¿´´ ¹·ª» ·²¼·½¿¬·±²- ¿¾±«¬ ¬¸» ¿½½«®¿½§ ½´¿-- ¿²¼ ¬¸» ®¿¬»¼ ¾«®¼»² º±® ¬¸» ±¬¸»® ¬¿°°·²¹-ò

Unlock full access with a free trial. Table 11   Limits of current error and phase displacement for  measuring current transformers (classes from 0.1 to 1) Accuracy class

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 Percentage current (ratio) error at percentage of rated current shown below

 Phase displacement at percentage of rated current shown below Ó·²«¬»-

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

Š éí Š

Table 12   Limits of current error and phase displacement for measuring current transformers for special application Accuracy class

 Percentage current (ratio) error at percentage of rated current shown below

 Phase displacement at percentage of rated current shown below Ó·²«¬»-

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Table 13   Limits of current error for measuring current transformers (classes 3 and 5) Class

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11.3

Extended current ratingsUnlock full access with a free trial.

Ý«®®»²¬ ¬®¿²-º±®³»®- ±º ¿½½«®¿½§ ½´¿--»- ðòï ¬± ï ³¿§ ¾» ³¿®µ»¼ ¿- ¸¿ª·²¹ ¿² »¨¬»²¼»¼ ½«®®»²¬ ®¿¬·²¹ °®±ª·¼»¼ ¬¸»§ ½±³°´§ ©·¬¸ ¬¸» º±´´±©·²¹ ¬©±Trial ®»¯«·®»³»²¬-æ Download With Free ¿÷ ¬¸» ®¿¬»¼ ½±²¬·²«±«- ¬¸»®³¿´ ½«®®»²¬ -¸¿´´ ¾» ¬¸» ®¿¬»¼ »¨¬»²¼»¼ °®·³¿®§ ½«®®»²¬ »¨°®»--»¼ ¿- ¿ °»®½»²¬¿¹» ±º ¬¸» ®¿¬»¼ °®·³¿®§ ½«®®»²¬å ¾÷ ¬¸» ´·³·¬- ±º ½«®®»²¬ »®®±® ¿²¼ °¸¿-» ¼·-°´¿½»³»²¬ °®»-½®·¾»¼ º±® ïîð û ±º ®¿¬»¼ °®·³¿®§ ½«®®»²¬ ·² ¬¿¾´» ïï -¸¿´´ ¾» ®»¬¿·²»¼ «° ¬± ¬¸» ®¿¬»¼ »¨¬»²¼»¼ °®·³¿®§ ½«®®»²¬ò

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Type tests for accuracy of measuring current transformers  Useful  Not useful

̧°» ¬»-¬- ¬± °®±ª» ½±³°´·¿²½» ©·¬¸ ïïòî -¸¿´´ô ·² ¬¸» ½¿-» ±º ¬®¿²-º±®³»®- ±º ½´¿--»- ðòï ¬± ïô ¾» ³¿¼» ¿¬ »¿½¸ ª¿´«» ±º ½«®®»²¬ ¹·ª»² ·² ¬¿¾´» ïï ¿¬ îë û ¿²¼ ¿¬ ïðð û ±º ®¿¬»¼ ¾«®¼»²

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11.5

18678589IEC-60044-1

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Routine tests for accuracy of measuring current transformers

̸» ®±«¬·²» ¬»-¬ º±® ¿½½«®¿½§ ·- ·² °®·²½·°´» ¬¸» -¿³» ¿- ¬¸» ¬§°» ¬»-¬ ·² ïïòìô ¾«¬ ®±«¬·²» ¬»-¬¿¬ ¿ ®»¼«½»¼ ²«³¾»® ±º ½«®®»²¬- ¿²¼ñ±® ¾«®¼»²- ¿®» °»®³·--·¾´» °®±ª·¼»¼ ·¬ ¸¿- ¾»»² -¸±©² ¾§ ¬§°» ¬»-¬- ±² ¿ -·³·´¿® ¬®¿²-º±®³»® ¬¸¿¬ -«½¸ ¿ ®»¼«½»¼ ²«³¾»® ±º ¬»-¬- ·- -«ºº·½·»²¬ ¬± °®±ª» ½±³°´·¿²½» ©·¬¸ ïïòîò 11.6

Instrument security factor 

 ß ¬§°» ¬»-¬ ³¿§ ¾» ° »®º ±®³ »¼ «-·² ¹ ¬¸ » º ±´´± ©·²¹ ·²¼·®» ½¬ ¬»-¬æ  Š

©·¬¸ ¬¸» °®·³¿® § ©·²¼·²¹ ±°»² ó½·®½« ·¬»¼ ô ¬¸» -»½±²¼¿®§ ©·²¼ ·²¹ ·- »²»®¹·¦»¼ ¿¬ ®¿¬»¼ º®»¯«»²½§ ¾§ ¿ -«¾-¬¿²¬·¿´´§ -·²«-±·¼¿´ ª±´¬¿¹» ¸¿ª·²¹ ¿² ®ò³ò-ò ª¿´«» »¯«¿´ ¬± ¬¸» -»½±²¼¿®§ ´·³·¬·²¹ »ò³òºò

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11.7

Marking of the rating plate of a measuring current transformer 

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̸» ®¿¬·²¹ °´¿¬» -¸¿´´ ½¿®®§ ¬¸» ¿°°®±°®·¿¬» ·²º±®³¿¬·±² ·² ¿½½±®¼¿²½» ©·¬¸ ïðòîò ̸» ¿½½«®¿½§ ½´¿-- ¿²¼ ·²-¬®«³»²¬ -»½«®·¬§ º¿½¬±® -¸¿´´ ¾» ·²¼·½¿¬»¼ º±´´±©·²¹ ¬¸» ·²¼·½¿¬·±² ±º  ½±®®»-°±²¼·²¹ ®¿¬»¼ ±«¬°«¬ ø»ò¹ò ïë Êß ½´¿-- ðòë FS ïð÷ò

 ®¿¬·²¹ Ý«®®»²¬ ¬®¿²-º±®³»®- ¸¿ª·²¹ ¿² »¨¬»²¼»¼ ½«®®»²¬ ®¿¬·²¹ ø-»» ïïòí÷ -¸¿´´ ¸¿ª» ¬¸·Sign up to vote on this title ·²¼·½¿¬»¼ ·³³»¼·¿¬»´§ º±´´±©·²¹ ¬¸» ½´¿-- ¼»-·¹²¿¬·±² ø»ò¹ò ïë Êß ½´¿-- ðòë »¨¬ò ïëð û÷ò

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Ú±® ½«®®»²¬ ¬®¿²-º±®³»®- ¸¿ª·²¹ ¿ ®¿¬»¼ ¾«®¼»² ²±¬ »¨½»»¼·²¹ ïë Êß ¿²¼ ¿² »¨¬»²¼»¼ ¾«®¼»² ¼±©² ¬± ï Êßô ¬¸·- ®¿¬·²¹ -¸¿´´ ¾» ·²¼·½¿¬»¼ ·³³»¼·¿¬»´§ ¾»º±®» ¬¸» ¾«®¼»² ·²¼·½¿¬·±² øº±®  »¨¿³°´»ô ï Êß ¬± ïð Êß ½´¿-- ðôî÷ò

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12.2

18678589IEC-60044-1

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Accuracy classes for protective current transformer 

12.2.1 Accuracy class designation Ú±® °®±¬»½¬·ª» ½«®®»²¬ ¬®¿²-º±®³»®-ô ¬¸» ¿½½«®¿½§ ½´¿-- ·- ¼»-·¹²»¼ ¾§ ¬¸» ¸·¹¸»-¬ °»®³·--·¾´» °»®½»²¬¿¹» ½±³°±-·¬» »®®±® ¿¬ ¬¸» ®¿¬»¼ ¿½½«®¿½§ ´·³·¬ °®·³¿®§ ½«®®»²¬ °®»-½®·¾»¼ º±® ¬¸» ¿½½«®¿½§ ½´¿-- ½±²½»®²»¼ô º±´´±©»¼ ¾§ ¬¸» ´»¬¬»® •ÐŒ ø³»¿²·²¹ °® ±¬»½¬·±²÷ò 12.2.2 Standard accuracy classes ̸» -¬¿²¼¿®¼ ¿½½«®¿½§ ½´¿--»- º±® °®±¬»½¬·ª» ½«®®»²¬ ¬®¿²-º±®³»®- ¿®»æ ëÐ ¿²¼ ïðÐò 12.3

Limits of errors for protective current transformers

 ß¬ ® ¿¬»¼ º®» ¯«»²½§ ¿ ²¼ © ·¬¸ ®¿¬»¼ ¾«® ¼»² ½±²²»½¬ »¼ô ¬¸» ½«®®»² ¬ »®®± ®ô °¸¿- » ¼·-°´¿½» ³»² ¬ ¿² ½±³°±-·¬» »®®±® -¸¿´´ ²±¬ »¨½»»¼ ¬¸» ª¿´«»- ¹·ª»² ·² ¬¿¾´» ïìò Ú±® ¬»-¬·²¹ °«®°±-»- ©¸»² ¼»¬»®³·²·²¹ ½«®®»²¬ »®®±® ¿²¼ °¸¿-» ¼·-°´¿½»³»²¬ô ¬¸» ¾«®¼»² -¸¿´´ ¸¿ª» ¿ °±©»®óº¿½¬±® ±º ðôè ·²¼«½¬·ª» »¨½»°¬ ¬¸¿¬ô ©¸»®» ¬¸» ¾«®¼»² ·- ´»-- ¬¸¿² ë Êßô ¿ °±©»®ó º¿½¬±® ±º ïôð ·- °»®³·--·¾´»ò Ú±® ¬¸» ¼»¬»®³·²¿¬·±² ±º ½±³°±-·¬» »®®±®ô ¬¸» ¾«®¼»² -¸¿´´ ¸¿ª» ¿ °±©»®óº¿½¬±® ±º ¾»¬©»»² ðôè ·²¼«½¬·ª» ¿²¼ «²·¬§ ¿¬ ¬¸» ¼·-½®»¬·±² ±º ¬¸» ³ ¿²«º¿½¬«®»®ò

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Table 14   Limits of error for protective current transformers Unlock full access with a free trial. Accuracy class

Current error at rated primary current %

 Phase displacement at rated primary current

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12.4

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Composite error at rated accuracy limit primary current %

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

Type and routine tests for current error and phase displacement of protective  Useful  Not useful current transformers

Ì»-¬- -¸¿´´ ¾» ³¿¼» ¿¬ ®¿¬»¼ °®·³¿®§ ½«®®»²¬ ¬± °®±ª» ½±³°´·¿²½» ©·¬¸ ïîòí ·² ®»-°»½¬ ±º  ½«®®»²¬ »®®±® ¿²¼ °¸¿-» ¼·-°´¿½»³»²¬ò

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18678589IEC-60044-1

IEC 60255 - 21-3

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¾÷ Ú±® ½«®®»²¬ ¬®¿²-º±®³»®- ¸¿ª·²¹ -«¾-¬¿²¬·¿´´§ ½±²¬·²«±«- ®·²¹ ½±®»-ô «²·º±®³´§ ¼·-¬®·¾«¬»¼ -»½±²¼¿®§ ©·²¼·²¹ø-÷ ±® «²·º±®³´§ ¼·-¬®·¾«¬»¼ °±®¬·±²- ±º ¬¿°°»¼ ©·²¼·²¹ø-÷ ¿²¼ ¸¿ª·²¹ »·¬¸»® ¿ ½»²¬®¿´´§ ´±½¿¬»¼ °®·³¿®§ ½±²¼«½¬±®ø-÷ ±® ¿ «²·º±®³´§ ¼·-¬®·¾«¬»¼ °®·³¿®§ ©·²¼·²¹ô ¬¸» ¼·®»½¬ ¬»-¬ ³¿§ ¾» ®»°´¿½»¼ ¾§ ¬¸» º±´´±©·²¹ ·²¼·®»½¬ ¬»-¬ô °®±ª·¼»¼ ¬¸¿¬ ¬¸» »ºº»½¬ ±º ¬¸» ®»¬«®² °®·³¿®§ ½±²¼«½¬±®ø-÷ ·- ²»¹´·¹·¾´»ò É·¬¸ ¬¸» °®·³¿®§ ©·²¼·²¹ ±°»²ó½·®½«·¬»¼ô ¬¸» -»½±²¼¿®§ ©·²¼·²¹ ·- »²»®¹·¦»¼ ¿¬ ®¿¬»¼ º®»¯«»²½§ ¾§ ¿ -«¾-¬¿²¬·¿´´§ -·²«-±·¼¿´ ª±´¬¿¹» ¸¿ª·²¹ ¿² ®ò³ò-ò ª¿´«» »¯«¿´ ¬± ¬¸» -»½±²¼¿®§ ´·³·¬·²¹ »ò³òºò ̸» ®»-«´¬·²¹ »¨½·¬·²¹ ½«®®»²¬ô »¨°®»--»¼ ¿- ¿ °»®½»²¬¿¹» ±º ¬¸» ®¿¬»¼ -»½±²¼¿®§ ½«®®»²¬ ³«´¬·°´·»¼ ¾§ ¬¸» ¿½½«®¿½§ ´·³·¬ º¿½¬±®ô -¸¿´´ ²±¬ »¨½»»¼ ¬¸» ´·³·¬ ±º ½±³°±-·¬» »®®±® ¹·ª»² ·² ¬¿¾´» ïìò ÒÑÌÛ ï ײ ½¿´½«´¿¬·²¹ ¬¸» -»½±²¼¿®§ ´·³·¬·²¹ »ò³òºòô ¬¸» -»½±²¼¿®§ ©·²¼·²¹ ·³°»¼¿²½» -¸±«´¼ ¾» ¿--«³»¼ ¬± ¾» »¯«¿´ ¬± ¬¸» -»½±²¼¿®§ ©·²¼·²¹ ®»-·-¬¿²½» ³»¿-«®»¼ ¿¬ ®±±³ ¬»³°»®¿¬«®» ¿²¼ ½±®®»½¬»¼ ¬± éë pÝò ó ó À    ô À    ô   ô   ô À    ô À    ô   ô   ô À    ô À    ô À  À    ô   ô   ô   ô À    ô À  À  À    ô À    ô ó À  ó À    ô   ô À    ô   ô À    ô À    ô   ô À  ó ó ó

ÒÑÌÛ î ײ ¼»¬»®³·²·²¹ ¬¸» ½±³°±-·¬» »®®±® ¾§ ¬¸» ·²¼·®»½¬ ³»¬¸±¼ô ¿ °±--·¾´» ¼·ºº»®»²½» ¾»¬©»»² ¬«®²- ®¿¬·± ¿²¼ ®¿¬»¼ ¬®¿²-º±®³¿¬·±² ®¿¬·± ²»»¼ ²±¬ ¾» ¬¿µ»² ·²¬± ¿½½±«²¬ò

12.6

Routine tests for composite error 

Ú±® ¿´´ ¬®¿²-º±®³»®- ¯«¿´·º§·²¹ «²¼»® ·¬»³ ¾÷ ±º ïîòëô ¬¸» ®±«¬·²» ¬»-¬ ·- ¬¸» -¿³» ¿- ¬¸» ¬§°» ¬»-¬ò Ú±® ±¬¸»® ¬®¿²-º±®³»®-ô ¬¸» ·²¼·®»½¬ ¬»-¬ ±º ³»¿-«®·²¹ ¬¸» »¨½·¬·²¹ ½«®®»²¬ ³¿§ ¾» «-»¼ô ¾«¬ ¿ ½±®®»½¬·±² º¿½¬±® -¸¿´´ ¾» ¿°°´·»¼ ¬± ¬¸» ®»-«´¬-ô ¬¸» º¿½¬±® ¾»·²¹ ±¾¬¿·²»¼ º®±³ ¿ ½±³°¿®·-±² ¾»¬©»»² ¬¸» ®»-«´¬- ±º ¼·®»½¬ ¿²¼ ·²¼·®»½¬ ¬»-¬- ¿°°´·»¼ ¬ ± ¿ ¬®¿²-º±®³»® ±º ¬¸» -¿³» ¬§°» ¿- ¬¸» ±²» «²¼»® ½±²-·¼»®¿¬·±² ø-»» ²±¬» î÷ô ¬¸» ¿½½«®¿½§ ´·³·¬ º¿½¬±® ¿²¼ ¬¸» ½±²¼·¬·±²- ±º ´±¿¼·²¹ You're Reading a Preview ¾»·²¹ ¬¸» -¿³»ò

with a free ¾§ trial. ײ -«½¸ ½¿-»-ô ½»®¬·º·½¿¬»- ±º ¬»-¬ Unlock -¸±«´¼full ¾»access ¸»´¼ ¿ª¿·´¿¾´» ¬¸» ³¿²«º¿½¬«®»®ò ÒÑÌÛ ï ̸» ½±®®»½¬·±² º¿½¬±® ·- »¯«¿´ ¬± ¬¸» ®¿¬·± ±º ¬¸» ½±³°±-·¬» »®®±® ±¾¬¿·²»¼ ¾§ ¬¸» ¼·®»½¬ ³»¬¸±¼ ¿²¼ ¬¸» »¨½·¬·²¹ ½«®®»²¬ »¨°®»--»¼ ¿- ¿ °»®½»²¬¿¹» ±º ¬¸» ®¿¬»¼ -»½±²¼¿®§ ½«®®»²¬ ³«´¬·°´·»¼ ¾§ ¬¸» ¿½½«®¿½§ ´·³·¬ º¿½¬±®ô ¿¼»¬»®³·²»¼ ¾§ ¬¸» ·²¼·®»½¬ ³»¬¸±¼ -°»½·º·»¼ ·² ·¬»³ ¿÷ ±º ïîòëò

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ÒÑÌÛ î ̸» »¨°®»--·±² •¬®¿²-º±®³»® ±º ¬¸» -¿³» ¬§°»Œ ·³°´·»- ¬¸¿¬ ¬¸» ¿³°»®» ¬«®²- ¿®» ¬¸» -¿³» ·®®»-°»½¬·ª» ±º  ®¿¬·±ô ¿²¼ ¬¸¿¬ ¬¸» ¹»±³»¬®·½¿´ ¿®®¿²¹»³»²¬-ô ³¿¹²»¬·½ ³¿¬»®·¿´- ¿²¼ ¬¸» -»½±²¼¿®§ ©·²¼·²¹- ¿®» ·¼»²¬·½¿´ò

12.7

Marking of the rating plate of a protective current transformer 

̸» ®¿¬·²¹ °´¿¬» -¸¿´´ ½¿®®§ ¬¸» ¿°°®±°®·¿¬» ·²º±®³¿¬·±² ·² ¿½½±®¼¿²½» ©·¬¸ ïðòîò ̸» ®¿¬»¼  ½´¿-¿½½«®¿½§ ´·³·¬ º¿½¬±® -¸¿´´ ¾» ·²¼·½¿¬»¼ º±´´±©·²¹ ¬¸» ½±®®»-°±²¼·²¹ ±«¬°«¬ ¿²¼ title ¿½½«®¿½§ Sign up to vote on this ø»ò¹ò íð Êß ½´¿-- ëÐ ïð÷ò

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ÒÑÌÛ ß ½«®®»²¬ ¬®¿²-º±®³»® -¿¬·-º§·²¹ ¬¸» ®»¯«·®»³»²¬- ±º -»ª»®¿´ ½±³¾·²¿¬·±²- ±º ±«¬°«¬ ¿²¼ ¿½½«®¿½§ ½´¿-- ¿²¼ ¿½½«®¿½§ ´·³·¬ º¿½¬±® ³¿§ ¾» ³¿®µ»¼ ¿½½±®¼·²¹ ¬± ¿´´ ±º ¬¸»³ò Û¨¿³°´»æ

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

13.2

18678589IEC-60044-1

Š èï Š

Accuracy classes for class PR protective current transformers

13.2.1 Accuracy class designation ̸» ¿½½«®¿½§ ½´¿-- ·- ¼»-·¹²¿¬»¼ ¾§ ¬¸» ¸·¹¸»-¬ °»®³·--·¾´» °»®½»²¬¿¹» ½±³°±-·¬» »®®±® ¿¬ ¬¸» ®¿¬»¼ ¿½½«®¿½§ ´·³·¬ °®·³¿®§ ½«®®»²¬ °®»-½®·¾»¼ º±® ¬¸» ¿½½«®¿½§ ½´¿-- ½±²½»®²»¼ô º±´´±©»¼ ¾§ ¬¸» ´»¬¬»®- þÐÎþ ø·²¼·½¿¬·²¹ °®±¬»½¬·±² ´±© ®»³¿²»²½»÷ò ó ó À    ô À    ô   ô   ô À    ô À    ô   ô   ô À    ô À    ô À  À    ô   ô   ô   ô À    ô À  À  À    ô À    ô ó À  ó À    ô   ô À    ô   ô À    ô À    ô   ô À  ó ó ó

13.2.2 Standard accuracy classes ̸» -¬¿²¼¿®¼ ¿½½«®¿½§ ½´¿--»- º±® ´±© ®»³¿²»²½» °®±¬»½¬·ª» ½«®®»²¬ ¬®¿²-º±®³»®- ¿®»æ ë ÐÎ ¿²¼ ïð ÐÎò 13.3

Limits of error for class PR protective current transformers

13.3.1 Current error, phase displacement and composite error  λº»® ¬± ïîòíò Ô·³·¬- ±º »®®±® ¿®» ¹·ª»² ·² ¬¿¾´» ïëò Table 15   Limits of error for class PR protective current transformers Current error at rated primary current û

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Composite error at rated accuracy limit primary current û

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Accuracy class

13.3.2 Remanence factor (K r )

Phase displacement at rated primary current

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̸» ®»³¿²»²½» º¿½¬±® øK ® ÷ -¸¿´´ ²±¬ »¨½»»¼ ïð ûò ÒÑÌÛ

ײ-»®¬·±² ±º ±²» ±® ³±®» ¿·® ¹¿°- ·² ¬¸» ½±®» ³¿§ ¾» ¿ ³»¬¸±¼ º±® ´·³·¬·²¹ ¬¸» ®»³¿²»²½» º¿½¬±®ò

13.3.3 Secondary loop time constant ( T s ) ׺ ®»¯«·®»¼ô ¬¸» ª¿´«» -¸¿´´ ¾» -°»½·º·»¼ ¾§ ¬¸» °«®½¸¿-»®ò 13.3.4 Secondary winding resistance (R ct )

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׺ ®»¯«·®»¼ô ¬¸» ³¿¨·³«³ ª¿´«» -¸¿´´ ¾» ¿¹®»»¼ ¾»¬©»»² ³¿²«º¿½¬«®»® ¿²¼ °«®½¸¿-»®ò

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

18678589IEC-60044-1

IEC 60255 - 21-3

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13.4.2 Determination of secondary loop time constant ( T s ) ̸» -»½±²¼¿®§ ´±±° ¬·³» ½±²-¬¿²¬ ø T - ÷ -¸¿´´ ¾» ¼»¬»®³·²»¼ò ׬ -¸¿´´ ²±¬ ¼·ºº»® º®±³ ¬¸» -°»½·º·»¼ ª¿´«» ¾§ ³±®» ¬¸¿² oíð ûò ׺ ®»¯«·®»¼ô ®»º»® ¬± ×ÛÝ êððììóêô ¿²²»¨ Þò 13.4.3 Determination of secondary winding resistance (R ct ) ̸» -»½±²¼¿®§ ©·²¼·²¹ ®»-·-¬¿²½» -¸¿´´ ¾» ³»¿-«®»¼ ¿²¼ ¿² ¿°°®±°®·¿¬» ½±®®»½¬·±² ¿°°´·»¼ ·º  ¬¸» ³»¿-«®»³»²¬ ·- ³¿¼» ¿¬ ¿ ¬»³°»®¿¬«®» ©¸·½¸ ¼·ºº»®- º®±³ éë pÝ ±® -«½¸ ±¬¸»® ¬»³°»®¿¬«®» ¿- ³¿§ ¸¿ª» ¾»»² -°»½·º·»¼ò ̸» ª¿´«» -± ¿¼¶«-¬»¼ ·- ¬¸» ®¿¬»¼ ª¿´«» º±® R ½¬ ò ÒÑÌÛ Ú±® ¼»¬»®³·²¿¬·±² ±º -»½±²¼¿®§ ´±±° ®»-·-¬¿²½» ø R - ã R ½¬ õ R ¾ ÷ô R ¾   ·- ¬¸» ®¿¬»¼ ®»-·-¬·ª» ¾«®¼»² ©¸·½¸ô ·² ¬¸» ½¿-» ±º ½´¿-- ÐÎ ½«®®»²¬ ¬®¿²-º±®³»®-ô ·- ¬¿µ»² ¿- ¾»·²¹ »¯«¿´ ¬± ¬¸» ®»-·-¬·ª» °¿®¬ ±º ¬¸» ¾«®¼»² «-»¼ ·² ¿½½±®¼¿²½» ©·¬¸ ïîòí º±® ¬¸» ¼»¬»®³·²¿¬·±² ±º ½«®®»²¬ »®®±® ¿²¼ °¸¿-» ¼·-°´¿½»³»²¬ò

13.5

Marking of rating plate of class PR current transformers

13.5.1 Principal marking Í»» ïðòî ¿²¼ ïîòéò λ°´¿½» ¿½½«®¿½§ ½´¿--»- þëÐþ ¿²¼ þïðÐþ ©·¬¸ þë ÐÎþ ¿²¼ þïð ÐÎþ ®»-°»½¬·ª»´§ò 13.5.2 Special marking (when required): ¿÷ -»½±²¼¿®§ ´±±° ¬·³» ½±²-¬¿²¬ øT - ÷å ¾÷ -»½±²¼¿®§ ©·²¼·²¹ ®»-·-¬¿²½» øR ½¬ ÷ ¿¬ ¿ ¬»³°»®¿¬«®» ±º éë pÝò

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14 Additional requirements for class PX protective current transformers 14.1

Unlock full access with a free trial. Specification of performance for class PX protective current transformers

̸» °»®º±®³¿²½» ±º ½´¿-- ÐÈ ½«®®»²¬ ¬®¿²-º±®³»®- -¸¿´´ ¾» -°»½·º·»¼ ·² ¬»®³- ±º ¬¸» º±´´±©·²¹æ

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¿÷ ®¿¬»¼ °®·³¿®§ ½«®®»²¬ øI °² ÷å ¾÷ ®¿¬»¼ -»½±²¼¿®§ ½«®®»²¬ øI -² ÷å ½÷ ®¿¬»¼ ¬«®²- ®¿¬·±ò ̸» ¬«®²- ®¿¬·± »®®±® -¸¿´´ ²±¬ »¨½»»¼ ðôîë ûå ¼÷ ®¿¬»¼ µ²»» °±·²¬ »ò³òºò øE µ ÷å

 »÷ ³¿¨·³«³ »¨½·¬·²¹ ½«®®»²¬ øI » ÷ ¿¬ ¬¸» ®¿¬»¼ µ²»» °±·²¬Sign »ò³òºò -¬¿¬»¼ up ¿²¼ñ±® to vote ¿¬ on ¿this title °»®½»²¬¿¹» ¬¸»®»±ºå º÷

 ³¿¨·³«³ ®»-·-¬¿²½» ±º ¬¸» -»½±²¼¿®§ ©·²¼·²¹ ¿¬ ¿ ¬»³°»®¿¬«®» ±º éë pÝ øR ½¬ ÷å

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

14.2

18678589IEC-60044-1

IEC 60255 - 21-3

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Š èë Š

Insulation requirements for class PX protective current transformers

14.2.1 Insulation requirements for secondary winding ̸» -»½±²¼¿®§ ©·²¼·²¹ ·²-«´¿¬·±² ±º ½´¿-- ÐÈ ½«®®»²¬ ¬®¿²-º±®³»®- ¸¿ª·²¹ ¿ ®¿¬»¼ µ²»» °±·²¬ ª±´¬¿¹» E µ  î µÊ -¸¿´´ ¾» ½¿°¿¾´» ±º ©·¬¸-¬¿²¼·²¹ ¿ ®¿¬»¼ °±©»® º®»¯«»²½§ ©·¬¸-¬¿²¼ ª±´¬¿¹» ±º ë µÊ ®ò³ò-ò º±® êð -ò Ú±® E µ  ä î µÊô ¬¸» ©·¬¸-¬¿²¼ ª±´¬¿¹» -¸¿´´ ¾» í µÊ ®ò³ò-ò º±® êð -ò 14.2.2 Inter-turn insulation requirements Ú±® ½´¿-- ÐÈ ¬®¿²-º±®³»®- ¸¿ª·²¹ ¿ ®¿¬»¼ µ²»» °±·²¬ »ò³òºò ±º ìëð Ê ±® ´»--ô ¬¸» ®¿¬»¼ ©·¬¸-¬¿²¼ ª±´¬¿¹» º±® ·²¬»®ó¬«®² ·²-«´¿¬·±² -¸¿´´ ¾» ·² ¿½½±®¼¿²½» ©·¬¸ èòìò Ú±® ¬¸±-» ©·¬¸ ¿ ®¿¬»¼ µ²»» °±·²¬ »ò³òºò ±º ¹®»¿¬»® ¬¸¿² ìëð Êô ¬¸» ®¿¬»¼ ©·¬¸-¬¿²¼ ª±´¬¿¹» º±® ¬¸» ·²¬»®ó¬«®² ·²-«´¿¬·±² -¸¿´´ ¾» ¿ °»¿µ ª±´¬¿¹» ±º ïð ¬·³»- ¬¸» ®ò³ò-ò ª¿´«» ±º ¬¸» -°»½·º·»¼ µ²»» °±·²¬ »ò³òºòô ±® ïð µÊ °»¿µô ©¸·½¸»ª»® ·- ¬¸» ´±©»®ò ÒÑÌÛ Ú±® -±³» ÛØÊ ¬®¿²-³·--·±² -§-¬»³-ô ¿ ¸·¹¸»® ´·³·¬·²¹ ª¿´«» ±º °»¿µ ª±´¬¿¹» ³¿§ ¾» ¿¹®»»¼ ¾»¬©»»² ¬¸» ³¿²«º¿½¬«®»® ¿²¼ ¬¸» °«®½¸¿-»®ò

14.3

Type tests for class PX protective current transformers

Ý´¿-- ÐÈ ½«®®»²¬ ¬®¿²-º±®³»®- -¸¿´´ô ·² ¿¼¼·¬·±² ¬± ¬¸» ®»¯«·®»³»²¬- ±º ½´¿«-» éô ¾» ¬»-¬»¼ ¿°®»-½®·¾»¼ ¾»´±©ò 14.3.1 Proof of low reactance type ó ó À    ô À    ô   ô   ô À    ô À    ô   ô   ô À    ô À    ô À  À    ô   ô   ô   ô À    ô À  À  À    ô À    ô ó À  ó À    ô   ô À    ô   ô À    ô À    ô   ô À  ó ó ó

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14.4

Routine tests for class PX protective current transformers

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18678589IEC-60044-1

IEC 60255 - 21-3

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̸» »ò³òºò -¸¿´´ ¬¸»² ¾» ·²½®»¿-»¼ ¾§ ïð û ¿²¼ ¬¸» »¨½·¬·²¹ ½«®®»²¬ -¸¿´´ ²±¬ ·²½®»¿-» ¾§ ³±®» ¬¸¿² ëð ûò ß´´ ³»¿-«®»³»²¬- -¸¿´´ ¾» °»®º±®³»¼ «-·²¹ ®ò³ò-ò ³»¿-«®·²¹ ·²-¬®«³»²¬-ò Ü«» ¬± ¬¸» ²±²ó-·²«-±·¼¿´ ²¿¬«®» ±º ¬¸» ³»¿-«®»¼ ¯«¿²¬·¬·»-ô ¬¸» ³»¿-«®»³»²¬- -¸¿´´ ¾» °»®º±®³»¼ «-·²¹ ®ò³ò-ò ³»¿-«®·²¹ ·²-¬®«³»²¬- ¸¿ª·²¹ ¿ ½®»-¬ º¿½¬±® íò ̸» »¨½·¬¿¬·±² ½¸¿®¿½¬»®·-¬·½ -¸¿´´ ¾» °´±¬¬»¼ ¿¬ ´»¿-¬ «° ¬± ¬¸» ®¿¬»¼ µ²»» °±·²¬ »ò³òºò ̸» »¨½·¬·²¹ ½«®®»²¬ øI' » ÷ ¿¬ ¬¸» ®¿¬»¼ µ²»»ó°±·²¬ »ò³òºò ¿²¼ ¿¬ ¿²§ -¬¿¬»¼ °»®½»²¬¿¹»ô -¸¿´´ ²±¬ »¨½»»¼ ¬¸» ®¿¬»¼ ª¿´«»ò ̸» ²«³¾»® ±º ³»¿-«®»³»²¬ °±·²¬- -¸¿´´ ¾» ¿¹®»»¼ ¾»¬©»»² ¬¸» ³¿²«º¿½¬«®»® ¿²¼ ¬¸» °«®½¸¿-»®ò 14.4.2 Secondary winding resistance (R ct ) ̸» ®»-·-¬¿²½» ±º ¬¸» ½±³°´»¬» -»½±²¼¿®§ ©·²¼·²¹ -¸¿´´ ¾» ³»¿-«®»¼ò ̸» ª¿´«» ±¾¬¿·²»¼ ©¸»² ½±®®»½¬»¼ ¬± éë pÝ -¸¿´´ ²±¬ »¨½»»¼ ¬¸» -°»½·º·»¼ ª¿´«»ò 14.4.3 Turns ratio error ( t ) ̸» ¬«®²- ®¿¬·± -¸¿´´ ¾» ¼»¬»®³·²»¼ ·² ¿½½±®¼¿²½» ©·¬¸ ×ÛÝ êððììóêô ¿²²»¨ Ûò ̸» ¬«®²- ®¿¬·± »®®±® -¸¿´´ ²±¬ »¨½»»¼ ¬¸» ª¿´«» ¹·ª»² ·² ïìòï ½÷ò ÒÑÌÛ ß -·³°´·º·»¼ ¬»-¬ ·²ª±´ª·²¹ ³»¿-«®»³»²¬ ±º ¬¸» ®¿¬·± »®®±® ©·¬¸ ¦»®± ½±²²»½¬»¼ ¾«®¼»² ³¿§ ¾» -«¾-¬·¬«¬»¼ ¾§ ¿¹®»»³»²¬ ¾»¬©»»² ¬¸» ³¿²«º¿½¬«®»® ¿²¼ °«®½¸¿-»®ò

14.4.4 Insulation tests Ì»-¬- -¸¿´´ ¾» °»®º±®³»¼ ¬± ¼»³±²-¬®¿¬» ½±³°´·¿²½» ©·¬¸ ïìòîòïò Ú±® ¬¸» ¬»-¬ ³»¬¸±¼ô ®»º»®  You're Reading a Preview ¬± èòíò

Unlock full access with a free trial. 14.4.5 Inter-turn insulation tests Ì»-¬- -¸¿´´ ¾» °»®º±®³»¼ ¬± ¼»³±²-¬®¿¬» ½±³°´·¿²½» ©·¬¸ ïìòîòîò Ú±® ¬¸» ¬»-¬ ³»¬¸±¼ô ®»º»®  Download With Free Trial ¬± èòìò 14.5

Marking of rating plate of class PX current transformers

14.5.1 Principal marking λº»® ¬± ïðòîò 14.5.2 Special marking ¿÷ ®¿¬»¼ ¬«®²- ®¿¬·±å ¾÷ ®¿¬»¼ µ²»» °±·²¬ »ò³òºò øE  ÷å

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

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IEC 60255 - 21-3

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60044-1 © IEC:1996+A1:2000+A2:2002

18678589IEC-60044-1

IEC 60255 - 21-3

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18678589IEC-60044-1

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60044-1 © IEC:1996+A1:2000+A2:2002

IEC 60255 - 21-3

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18678589IEC-60044-1

IEC 60255 - 21-3

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IEC 60255 - 21-3

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Annex A ø²±®³¿¬·ª»÷ Protective current transformers A.1

Vector diagram

׺ ½±²-·¼»®¿¬·±² ·- ¹·ª»² ¬± ¿ ½«®®»²¬ ¬®¿²-º±®³»® ©¸·½¸ ·- ¿--«³»¼ ¬± ½±²¬¿·² ±²´§ ´·²»¿®  »´»½¬®·½ ¿²¼ ³¿¹²»¬·½ ½±³°±²»²¬- ·² ·¬-»´º ¿²¼ ·² ·¬- ¾«®¼»²ô ¬¸»²ô «²¼»® ¬¸» º«®¬¸»®  ¿--«³°¬·±² ±º -·²«-±·¼¿´ °®·³¿®§ ½«®®»²¬ô ¿´´ ¬¸» ½«®®»²¬-ô ª±´¬¿¹»- ¿²¼ º´«¨»- ©·´´ ¾» -·²«-±·¼¿´ô ¿²¼ ¬¸» °»®º±®³¿²½» ½¿² ¾» ·´´«-¬®¿¬»¼ ¾§ ¿ ª»½¬±® ¼·¿¹®¿³ -«½¸ ¿- º·¹«®» ßòïò ײ º·¹«®» ßòïô I -   ®»°®»-»²¬- ¬¸» -»½±²¼¿®§ ½«®®»²¬ò ׬ º´±©- ¬¸®±«¹¸ ¬¸» ·³°»¼¿²½» ±º ¬¸» -»½±²¼¿®§ ©·²¼·²¹ ¿²¼ ¬¸» ¾«®¼»² ©¸·½¸ ¼»¬»®³·²»- ¬¸» ³¿¹²·¬«¼» ¿²¼ ¼·®»½¬·±² ±º ¬¸» ²»½»--¿®§ ·²¼«½»¼ ª±´¬¿¹» E - ¿²¼ ±º ¬¸» º´«¨ ©¸·½¸ ·- °»®°»²¼·½«´¿® ¬± ¬¸» ª±´¬¿¹» ª»½¬±®ò ̸·- º´«¨ ·- ³¿·²¬¿·²»¼ ¾§ ¬¸» »¨½·¬·²¹ ½«®®»²¬  I »ô ¸¿ª·²¹ ¿ ³¿¹²»¬·¦·²¹ ½±³°±²»²¬ I ³  °¿®¿´´»´ ¬± ¬¸» º´«¨ ô ¿²¼ ¿ ´±-- ø±® ¿½¬·ª»÷ ½±³°±²»²¬ I ¿   °¿®¿´´»´ ¬± ¬¸» ª±´¬¿¹»ò ̸» ª»½¬±® -«³ ±º ¬¸» -»½±²¼¿®§ ½«®®»²¬ I -   ¿²¼ ¬¸» »¨½·¬·²¹ ½«®®»²¬ I »   ·- ¬¸» ª»½¬±® I  °   ®»°®»-»²¬·²¹ ¬¸» °®·³¿®§ ½«®®»²¬ ¼·ª·¼»¼ ¾§ ¬¸» ¬«®²- ®¿¬·± ø²«³¾»® ±º -»½±²¼¿®§ ¬«®²- ¬± ²«³¾»® ±º °®·³¿®§ ¬«®²-÷ò ̸«-ô º±® ¿ ½«®®»²¬ ¬®¿²-º±®³»® ©·¬¸ ¬«®²- ®¿¬·± »¯«¿´ ¬± ¬¸» ®¿¬»¼ ¬®¿²-º±®³¿¬·±² ®¿¬·±ô ¬¸» ¼·ºº»®»²½» ·² ¬¸» ´»²¹¬¸- ±º ¬¸» ª»½¬±®- I -  ¿²¼ I  °ô  ®»´¿¬»¼ ¬± ¬¸» ´»²¹¬¸ ±º I  ° ô  ·- ¬¸» ½«®®»²¬ »®®±®  ¿½½±®¼·²¹ ¬± ¬¸» ¼»º·²·¬·±² ±º îòïòïðô ¿²¼ ¬¸» ¿²¹«´¿® ¼·ºº»®»²½» ·- ¬¸» °¸¿-» ¼·-°´¿½»³»²¬ ¿½½±®¼·²¹ ¬± îòïòïïò You're Reading a Preview

A.2

Turns correction

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ɸ»² ¬¸» ¬«®²- ®¿¬·± ·- ¼·ºº»®»²¬ º®±³ ø«-«¿´´§ ´»-- ¬¸¿²÷ ¬¸» ®¿¬»¼ ¬®¿²-º±®³¿¬·±² ®¿¬·±ô ¬¸» Download With Free Trial ½«®®»²¬ ¬®¿²-º±®³»® ·- -¿·¼ ¬± ¸¿ª» ¬«®²- ½±®®»½¬·±²ò ̸«-ô ·² »ª¿´«¿¬·²¹ ¬¸» °»®º±®³¿²½»ô ·¬ ·²»½»--¿®§ ¬± ¼·-¬·²¹«·-¸ ¾»¬©»»² I  ° ô  ¬¸» °®·³¿®§ ½«®®»²¬ ¼·ª·¼»¼ ¾§ ¬¸» ¬«®²- ®¿¬·±ô ¿²¼ I  ° ô  ¬¸» °®·³¿®§ ½«®®»²¬ ¼·ª·¼»¼ ¾§ ¬¸» ®¿¬»¼ ¬®¿²-º±®³¿¬·±² ®¿¬·±ò ß¾-»²½» ±º ¬«®²- ½±®®»½¬·±² ³»¿²- I  = I  ° ò ׺ ¬«®²- ½±®®»½¬·±² ·- °®»-»²¬ô I  °  ·- ¼·ºº»®»²¬ º®±³ I  °ô  ¿²¼ -·²½» I  °  ·- «-»¼ ·² ¬¸» ª»½¬±®  ¼·¿¹®¿³ ¿²¼ I °   ·- «-»¼ º±® ¬¸» ¼»¬»®³·²¿¬·±² ±º ¬¸» ½«®®»²¬ »®®±®ô ·¬ ©·´´ ¾» -»»² ¬¸¿¬ ¬«®²½±®®»½¬·±² ¸¿- ¿² ·²º´«»²½» ±² ¬¸» ½«®®»²¬ »®®±® ø¿²¼ ³¿§ ¾» «-»¼ ¼»´·¾»®¿¬»´§ º±® ¬¸¿¬ °«®°±-»÷ò ر©»ª»®ô ¬¸» ª»½¬±®- I  °  ¿²¼ I  °  ¸¿ª» ¬¸» -¿³» ¼·®»½¬·±²ô -± ¬«®²- ½±®®»½¬·±²¸¿- ²± Sign up to vote on this title ·²º´«»²½» ±² °¸¿-» ¼·-°´¿½»³»²¬ò

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׬ ©·´´ ¿´-± ¾» ¿°°¿®»²¬ ¬¸¿¬ ¬¸» ·²º´«»²½» ±º ¬«®²- ½±®®»½¬·±² ±² ½±³°±-·¬» »®®±® ·- ´»-- ¬¸¿² ·¬·²º´«»²½» ±² ½«®®»²¬ »®®±®ò

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IEC 62271-200 CELDAS MT.pdf

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

18678589IEC-60044-1

IEC 60255 - 21-3

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Š ïðë Š

̸«-ô º±® ¿ ½«®®»²¬ ¬®¿²-º±®³»® ©·¬¸±«¬ ¬«®²- ½±®®»½¬·±² ¿²¼ «²¼»® ½±²¼·¬·±²- ©¸»®» ¿ ª»½¬±®  ®»°®»-»²¬¿¬·±² ·- ¶«-¬·º·¿¾´»ô ¬¸» ½«®®»²¬ »®®±®ô °¸¿-» ¼·-°´¿½»³»²¬ ¿²¼ ½±³°±-·¬» »®®±® º±®³ ¿ ®·¹¸¬ó¿²¹´»¼ ¬®·¿²¹´»ò ײ ¬¸·- ¬®·¿²¹´»ô ¬¸» ¸§°±¬»²«-» ®»°®»-»²¬·²¹ ¬¸» ½±³°±-·¬» »®®±® ·- ¼»°»²¼»²¬ ±² ¬¸» ³¿¹²·¬«¼» ±º ¬¸» ¬±¬¿´ ¾«®¼»² ·³°»¼¿²½» ½±²-·-¬·²¹ ±º ¾«®¼»² ¿²¼ -»½±²¼¿®§ ©·²¼·²¹ô ©¸·´» ¬¸» ¼·ª·-·±² ¾»¬©»»² ½«®®»²¬ »®®±® ¿²¼ °¸¿-» ¼·-°´¿½»³»²¬ ¼»°»²¼- ±² ¬¸» °±©»® º¿½¬±®- ±º ¬¸» ¬±¬¿´ ¾«®¼»² ·³°»¼¿²½» ¿²¼ ±º ¬¸» »¨½·¬·²¹ ½«®®»²¬ò Æ»®± °¸¿-» ¼·-°´¿½»³»²¬ ©·´´ ®»-«´¬ ©¸»² ¬¸»-» ¬©± °±©»® º¿½¬±®- ¿®» »¯«¿´ô ·ò»ò ©¸»² I -  ¿²¼ I »  ¿®» ·² °¸¿-»ò

A.4

Composite error 

̸» ³±-¬ ·³°±®¬¿²¬ ¿°°´·½¿¬·±²ô ¸±©»ª»®ô ±º ¬¸» ½±²½»°¬ ±º ½±³°±-·¬» »®®±® ·- «²¼»® ½±²¼·¬·±²©¸»®» ¿ ª»½¬±® ®»°®»-»²¬¿¬·±² ½¿²²±¬ ¾» ¶«-¬·º·»¼ ¾»½¿«-» ²±²ó´·²»¿® ½±²¼·¬·±²- ·²¬®±¼«½» ¸·¹¸»® ¸¿®³±²·½- ·² ¬¸» »¨½·¬·²¹ ½«®®»²¬ ¿²¼ ·² ¬¸» -»½±²¼¿®§ ½«®®»²¬ ø-»» º·¹«®» ßòí÷ò ׬ ·- º±® ¬¸·- ®»¿-±² ¬¸¿¬ ¬¸» ½±³°±-·¬» »®®±® ·- ¼»º·²»¼ ¿- ·² îòïòíïô ¿²¼ ²±¬ ·² ¬¸» º¿® -·³°´»®  ©¿§ ¿- ¬¸» ª»½¬±® -«³ ±º ½«®®»²¬ »®®±® ¿²¼ °¸¿-» ¼·-°´¿½»³»²¬ ¿- -¸±©² ·² º·¹«®» ßòîò ̸«-ô ·² ¬¸» ¹»²»®¿´ ½¿-»ô ¬¸» ½±³°±-·¬» »®®±® ¿´-± ®»°®»-»²¬- ¬¸» ¼»ª·¿¬·±²- º®±³ ¬¸» ·¼»¿´ ½«®®»²¬ ¬®¿²-º±®³»® ¬¸¿¬ ¿®» ½¿«-»¼ ¾§ ¬¸» °®»-»²½» ·² ¬¸» -»½±²¼¿®§ ©·²¼·²¹ ±º ¸·¹¸»®  ¸¿®³±²·½- ©¸·½¸ ¼± ²±¬ »¨·-¬ ·² ¬¸» °®·³¿®§ò ø̸» °®·³¿®§ ½«®®»²¬ ·- ¿´©¿§- ½±²-·¼»®»¼ -·²«-±·¼¿´ º±® ¬¸» °«®°±-»- ±º ¬¸·- -¬¿²¼¿®¼ò÷

A.5

You're Reading a Preview

Direct test for composite error 

Unlock full access with a free trial. Ú·¹«®» ßòì -¸±©- ¿ ½«®®»²¬ ¬®¿²-º±®³»® ¸¿ª·²¹ ¿ ¬«®²- ®¿¬·± ±º ïñïò ׬ ·- ½±²²»½¬»¼ ¬± ¿ -±«®½» ±º °®·³¿®§ ø-·²«-±·¼¿´÷ ½«®®»²¬ô ¿ -»½±²¼¿®§ ¾«®¼»² Z Þ ©·¬¸ ´·²»¿® ½¸¿®¿½¬»®·-¬·½- ¿²¼ ¬± ¿² ¿³³»¬»® ·² -«½¸ ¿ ³¿²²»® ¬¸¿¬ ¾±¬¸ ¬¸» °®·³¿®§ ¿²¼ -»½±²¼¿®§ ½«®®»²¬- °¿-- ¬¸®±«¹¸ ¬¸» Download With Free Trial ¿³³»¬»® ¾«¬ ·² ±°°±-·¬» ¼·®»½¬·±²-ò ײ ¬¸·- ³¿²²»®ô ¬¸» ®»-«´¬¿²¬ ½«®®»²¬ ¬¸®±«¹¸ ¬¸» ¿³³»¬»®  ©·´´ ¾» »¯«¿´ ¬± ¬¸» »¨½·¬·²¹ ½«®®»²¬ «²¼»® ¬¸» °®»ª¿·´·²¹ ½±²¼·¬·±²- ±º -·²«-±·¼¿´ °®·³¿®§ ½«®®»²¬ô ¿²¼ ¬¸» ®ò³ò-ò ª¿´«» ±º ¬¸¿¬ ½«®®»²¬ ®»´¿¬»¼ ¬± ¬¸» ®ò³ò-ò ª¿´«» ±º ¬¸» °®·³¿®§ ½«®®»²¬ ·¬¸» ½±³°±-·¬» »®®±® ¿½½±®¼·²¹ ¬± îòïòíïô ¬¸» ®»´¿¬·±² ¾»·²¹ »¨°®»--»¼ ¿- ¿ °»®½»²¬¿¹»ò Ú·¹«®» ßòì ¬¸»®»º±®» ®»°®»-»²¬- ¬¸» ¾¿-·½ ½·®½«·¬ º±® ¬¸» ¼·®»½¬ ³»¿-«®»³»²¬ ±º ½±³°±-·¬» »® ®±®ò

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Ú·¹«®» ßòë ®»°®»-»²¬- ¬¸» ¾¿-·½ ½·®½«·¬ º±® ¬¸» ¼·®»½¬ ³»¿-«®»³»²¬ ±º ½±³°±-·¬» »®®±® º±®  Useful º®±³ useful ½«®®»²¬ ¬®¿²-º±®³»®- ¸¿ª·²¹ ®¿¬»¼ ¬®¿²-º±®³¿¬·±² ®¿¬·±«²·¬§ò ׬ -¸±©- ¬©±  ¼·ºº»®·²¹  Not ½«®®»²¬ ¬®¿²-º±®³»®- ±º ¬¸» -¿³» ®¿¬»¼ ¬®¿²-º±®³¿¬·±² ®¿¬·±ò ̸» ½«®®»²¬ ¬®¿²-º±®³»® ³¿®µ»¼ Ò ·- ¿--«³»¼ ¬± ¸¿ª» ²»¹´·¹·¾´» ½±³°±-·¬» »®®±® «²¼»® ¬¸» °®»ª¿·´·²¹ ½±²¼·¬·±²- ø³·²·³«³ ¾«®¼»²÷ô ©¸·´» ¬¸» ½«®®»²¬ ¬®¿²-º±®³»® «²¼»® ¬»-¬ ¿²¼ ³¿®µ»¼ È ·- ½±²²»½¬»¼ ¬± ·¬- ®¿¬»¼

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IEC 62271-200 CELDAS MT.pdf

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

A.6

18678589IEC-60044-1

IEC 60255 - 21-3

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Š ïðé Š

Alternative method for the direct measurement of composite error 

 ß´¬» ®²¿¬ ·ª» ³»¿²- ³¿§ ¾» «-»¼ º±® ¬¸» ³»¿-«®»³»²¬ ±º ½±³ °±-·¬» »®® ±® ¿²¼ ±²» ³»¬¸ ±¼ -¸±©² ·² º·¹«®» ßòêò ɸ·´-¬ ¬¸» ³»¬¸±¼ -¸±©² ·² º·¹«®» ßòë ®»¯«·®»- ¿ •-°»½·¿´Œ ®»º»®»²½» ¬®¿²-º±®³»® Ò ±º ¬¸» -¿³» ®¿¬»¼ ¬®¿²-º±®³¿¬·±² ®¿¬·± ¿- ¬¸» ¬®¿²-º±®³»® È ¿²¼ ¸¿ª·²¹ ²»¹´·¹·¾´» ½±³°±-·¬» »®®±® ¿¬ ¬¸» ¿½½«®¿½§ ´·³·¬ °®·³¿®§ ½«®®»²¬ô ¬¸» ³»¬¸±¼ -¸±©² ·² º·¹«®» ßòêô »²¿¾´»- -¬¿²¼¿®¼ ®»º»®»²½» ½«®®»²¬ ¬®¿²-º±®³»®- Ò ¿²¼ Ò ¬± ¾» «-»¼ ¿¬ ±® ¿¾±«¬ ¬¸»·® ®¿¬»¼ °®·³¿®§ ½«®®»²¬-ò ׬ ·- -¬·´´ »--»²¬·¿´ô ¸±©»ª»®ô º±® ¬¸»-» ®»º»®»²½» ¬®¿²-º±®³»®- ¬± ¸¿ª» ²»¹´·¹·¾´» ½±³°±-·¬» »®®±®- ¾«¬ ¬¸» ®»¯«·®»³»²¬ ·- »¿-·»® ¬± -¿¬·-º§ò ײ º·¹«®» ßòê È ·- ¬¸» ¬®¿²-º±®³»® «²¼»® ¬»-¬ô Ò ·- ¿ -¬¿²¼¿®¼ ®»º»®»²½» ¬®¿²-º±®³»® ©·¬¸ ¿ ®¿¬»¼ °®·³¿®§ ½«®®»²¬ ±º ¬¸» -¿³» ±®¼»® ±º ³¿¹²·¬«¼» ¿- ¬¸» ®¿¬»¼ ¿½½«®¿½§ ´·³·¬ °®·³¿®§ ½«®®»²¬ ±º  ¬®¿²-º±®³»® È ø¬¸» ½«®®»²¬ ¿¬ ©¸·½¸ ¬¸» ¬»-¬ ·- ¬± ¾» ³¿¼»÷ô ¿²¼ Ò ·- ¿ -¬¿²¼¿®¼ ®»º»®»²½» ¬®¿²-º±®³»® ¸¿ª·²¹ ¿ ®¿¬»¼ °®·³¿®§ ½«®®»²¬ ±º ¬¸» ±®¼»® ±º ³¿¹²·¬«¼» ±º ¬¸» -»½±²¼¿®§ ½«®®»²¬ ½±®®»-°±²¼·²¹ ¬± ¬¸» ®¿¬»¼ ¿½½«®¿½§ ´·³·¬ °®·³¿®§ ½«®®»²¬ ±º ¬®¿²-º±®³»® Èò ׬ -¸±«´¼ ¾» ²±¬»¼ ¬¸¿¬ ¬¸» ¬®¿²-º±®³»® Ò ½±²-¬·¬«¬»- ¿ °¿®¬ ±º ¬¸» ¾«®¼»² Z Þ  ±º ¬®¿²-º±®³»® È ¿²¼ ³«-¬ ¬¸»®»º±®» ¾» ¬¿µ»² ·²¬± ¿½½±«²¬ ·² ¼»¬»®³·²·²¹ ¬¸» ª¿´«» ±º ¬¸» ¾«®¼»² Z  Þ ò ß ï  ¿²¼ ß î  ¿®» ¬©± ¿³³»¬»®¿²¼ ½¿®» ³«-¬ ¾» ¬¿µ»² ¬¸¿¬ ß î   ³»¿-«®»- ¬¸» ¼·ºº»®»²½» ¾»¬©»»² ¬¸» -»½±²¼¿®§ ½«®®»²¬- ±º  ¬®¿²-º±®³»®- Ò ¿²¼ Ò ò ׺ ¬¸» ®¿¬»¼ ¬®¿²-º±®³¿¬·±² ®¿¬·± ±º ¬®¿²-º±®³»® Ò ·- K ² , ±º ¬®¿²-º±®³»® È ·- K ²¨   ¿²¼ ±º  ¬®¿²-º±®³»® Ò ·- K ² ô  ¬¸» ®¿¬·± K ²  ³«-¬ »¯«¿´ ¬¸» °®±¼«½¬ ±º K  ² ¿²¼  K ²¨ æ

You're Reading a Preview ·ò»ò K  ² ã K  ²  K ²¨ Unlock full access with a free trial. ˲¼»® ¬¸»-» ½±²¼·¬·±²-ô ¬¸» ®ò³ò-ò ª¿´«» ±º ¬¸» ½«®®»²¬ ·² ¿³³»¬»® ß î ô ®»´¿¬»¼ ¬± ¬¸» ½«®®»²¬ ·² ¿³³»¬»® ßî ô   ·- ¬¸» ½±³°±-·¬» »®®±® ±º ¬®¿²-º±®³»® Èô ¬¸» ®»´¿¬·±² ¾»·²¹ »¨°®»--»¼ ¿- ¿ °»®½»²¬¿¹»ò

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ÒÑÌÛ É¸»² «-·²¹ ¬¸» ³»¬¸±¼- -¸±©² ·² º·¹«®»- ßòë ¿²¼ ßòêô ½¿®» -¸±«´¼ ¾» ¬¿µ»² ¬± «-» ¿ ´±© ·³°»¼¿²½» ·²-¬®«³»²¬ º±® ß î  -·²½» ¬¸» ª±´¬¿¹» ¿½®±-- ¬¸·- ¿³³»¬»® ø¼·ª·¼»¼ ¾§ ¬¸» ®¿¬·± ±º ¬®¿²-º±®³»® Ò ·² ¬¸» ½¿-» ±º º·¹«®»  ßòê ÷ ½±² -¬· ¬«¬ »- °¿® ¬ ±º ¬¸» ¾«®¼ »² ª±´ ¬¿¹ » ±º ¬®¿ ²-º ±®³ »® È ¿²¼ ¬»² ¼- ¬± ®»¼« ½» ¬¸» ¾«®¼ »² ±² ¬¸·- ¬®¿ ²-º ±®³ »®ò Í·³·´¿®´§ô ¬¸·- ¿³³»¬»® ª±´¬¿¹» ·²½®»¿-»- ¬¸» ¾«®¼»² ±² ¬®¿²-º±®³»® Òò

A.7

Use of composite error 

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̸» ²«³»®·½ ª¿´«» ±º ¬¸» ½±³°±-·¬» »®®±® ©·´´ ²»ª»® ¾» ´»-- ¬¸¿² ¬¸» ª»½¬±® -«³ ±º ¬¸» ½«®®»²¬ »®®±® ¿²¼ ¬¸» °¸¿-» ¼·-°´¿½»³»²¬ ø¬¸» ´¿¬¬»® ¾»·²¹ »¨°®»--»¼ ·² ½»²¬·®¿¼·¿²-÷ò  Useful  Not useful ݱ²-»¯«»²¬´§ô ¬¸» ½±³°±-·¬» »®®±® ¿´©¿§- ·²¼·½¿¬»- ¬¸» ¸·¹¸»-¬ °±--·¾´» ª¿´«» ±º ½«®®»²¬ »®®±®  ±® °¸¿-» ¼·-°´¿½»³»²¬ò

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êððììóï w ×ÛÝæïççêõßïæîðððõßîæîððî

18678589IEC-60044-1

IEC 60255 - 21-3

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