NF C52-558-2-7-2008 Safety of power transformers power supplies reactors and similar products - Part 2-7 particular requirements and tests for transformers and power supplies for .pdf

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1、 7 6 77 7 7 7 77 7 7 9 7 7 w 77 77 8 8 7 7 77 7 WW 8 8 Remplacement: 7 77 77 7 7 7 7 6 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 6 7 7 7 7 7 7 7 77 7 7 7 6 7 7 7 8 6 7 7 7 7 7 7 7 7 7 7 8 6 7 7 6 7 7 7 7 7 7 6 7 77 Addition: Conducteurs et cbles isols au polychlorure de vinyle, de tension nominale au plus gale

2、450/750 V Partie 1: Prescriptions gnrales Conducteurs et cbles isols au caoutchouc Tension assigne au plus gale 450/750 V Partie 1: Exigences gnrales 7 Remplacement du troisime alina: 7 Addition: 77 7 7 7 7 7 7 7 7 7 7 7 77 777 7 7 Remplacement: 7 7 7 7 7 7 7 7 7 7 7 7 La conformit aux prescriptions

3、 de 6.101 6.105 est vrifie par examen du marquage. Remplacement: 8 7 6 Remplacement: 8 7 7 7 7 Remplacement: 8 7 Remplacement: 8 Addition: 6 7 7 Modification 7 6 7 7 7 Addition: 7 7 7 7 7 7 7 6 7 7 Modification: 7 7 7 7 8 r IEC 2386/06 8 7 8 7 6 p 7 p p p p p 7 Addition: 6 8 7 77 6 8 8 6 7 Remplacem

4、ent: 7 7La conformit est vrifie par examen. Modification: 7 7 7 7 7 7 7 7 7 7 7 Addition: 7 7 6 7 7 7 7 6 La conformit aux exigences de 12.101 et 12.102 est vrifie en mesurant la tension secondaire vide temprature ambiante, le transformateur tant connect la tension primaire assigne la frquence prima

5、ire assigne. 7 7 7 7 8 7 7 UUU U U Modification: Remplacer toutes les exigences pour les enveloppes extrieures par ce qui suit: 7p 7 6 7 7 7 7 7 7 7 6 7 7 Addition: Les transformateurs doivent tre soit des transformateurs rsistants aux courts-circuits,soit des transformateurs non dangereux en cas de

6、 dfaillance. Les transformateurs rsistants aux courts-circuits doivent rsister aux surcharges susceptibles de se produire en usage normal. Ils ne doivent pas tre munis de coupe-circuit fusible incorpor.Si le courant secondaire de court-circuit dpasse 20 A, un dispositif de protection contre les surcharges sans renclenchement automatique doit tre incorpor. Les dispositifs de protection contre les surcharges

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