IEC 60909-3 CORR 1-2013 Short-circuit currents in three phase AC systems - Part 3 Currents during two separate simultaneous line-to-earth short circuits and partial short-circuit c.pdf

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1、September 2013 Septembre 2013 IEC 60909-3 (Edition 3 2009) Short-circuit currents in three-phase a.c. systems Part 3: Currents during two separate simultaneous line-to-earth short circuits and partial short- circuit currents flowing through earth CEI 60909-3 (dition 3 2009) Courants de court-circuit

2、 dans les rseaux triphass courant alternatif Partie 3: Courants durant deux courts-circuits monophass simultans spars la terre et courants de court-circuit partiels scoulant travers la terre CORRIGENDUM 1 Corrections in the French version are given after the English. Table 2. Resistivity of the soil

3、 and equivalent earth penetration depth Replace for rocks 5150 by 5100 and for farmland 1320 by 931 as follows: Soil types Soil resistivity m Equivalent earth penetration depth m for 50 Hz for 60 Hz Granite Rocks Stony soil Pebbles, dry sand Calcareous soil, wet sand Farmland Clay, loam Marshy soil

4、10 000 3 000 . 10 000 1 000 . 3 000 200 . 1 200 70 . 200 50 . 100 10 . 50 9 300 5 100 . 9 330 2 950 . 5110 1 320 . 3 230 780 . 1 320 660 . 931 295 . 660 8 500 4 670 . 8 520 2 690 . 4 670 1 200 . 2 950 710 . 1 200 600 . 850 270 . 600 380 8.3.2.1 Case 1: R EF Replace Equations 51b and 52b as follows:

5、A= 0 B ) 0 ( 3 A ) 0 ( S1Amax ) 2 ( 3 I r I I + + (51b) A= A ) 0 ( 3 B ) 0 ( S1Bmax ) 2 ( 3 I r I I + + (52b) Replace Equations 54b and 55b as follows: A= 0 B ) 0 ( 3 max A E 3I r I = (54b) B= 0 A ) 0 ( 3 max B E 3I r I = (55b) September 2013 Septembre 2013 D.2.2 Cable impedances per unit length Rep

6、lace the last equation as follows: ( ) km / 1483 , 0 j 3856 , 0 ln 2 j3 8 3 ln 2 j3 8 3 ln 3 4 1 2 j 8 3 3 2 S 0 0 S 2 3 2 S 0 0 3 2 L 0 0 L (0)LSE + = + + + + + + = d r R d r d r R Z Corrections in the French version are given below. Tableau 2 Rsistivit du sol et profondeur quivalente de pntration

7、dans la terre Remplacer pour les rochers 5150 par 5100 et pour la terre agricole 1320 par 931 comme suit: Types de sol Rsistivit du sol m Profondeur quivalente de pntration dans la terre m pour 50 Hz pour 60 Hz Granite Rochers Sol pierreux Cailloux, sable sec Sol calcaire, sable humide Terre agricol

8、e Argile, glaise Sol marcageux 10 000 3 000 . 10 000 1 000 . 3 000 200 . 1 200 70 . 200 50 . 100 10 . 50 9 300 5 100 . 9 330 2 950 . 5 110 1 320 . 3 230 780 . 1 320 660 . 931 295 . 660 8 500 4 670 . 8 520 2 690 . 4 670 1 200 . 2 950 710 . 1 200 600 . 850 270 . 600 380 8.3.2.1 Cas 1: R EF Remplacer l

9、es Equations 51b et 52b comme suit: A= 0 B ) 0 ( 3 A ) 0 ( S1Amax ) 2 ( 3 I r I I + + (51b) A= A ) 0 ( 3 B ) 0 ( S1Bmax ) 2 ( 3 I r I I + + (52b) Remplacer les Equations 54b et 55b comme suit: A= 0 B ) 0 ( 3 max A E 3I r I = (54b) B= 0 A ) 0 ( 3 max B E 3I r I = (55b) D.2.2 Impdances liniques des cbles Remplacer la dernire quation comme suit. September 2013 Septembre 2013 ( ) km / 1483 , 0 j 3856 , 0 ln 2 j3 8 3 ln 2 j3 8 3 ln 3 4 1 2 j 8 3 3 2 S 0 0 S 2 3 2 S 0 0 3 2 L 0 0 L (0)LSE + = + + + + + + = d r R d r d r R Z