IEC_60358-1-2012_cor1-2013.pdf

July 2013 IEC 60358-1(1st edition 2012)Coupling capacitors and capacitor dividers Part 1:General rules C O R R I G E N D U M 1 4.4 System earthing Replace the text of Subclause 4.4 by the following new text:The considered system earthings are:a)isolated neutral system(see 3.1.10);b)resonant earthed system(see 3.1.13);c)earthed neutral system(see 3.1.15):1)solidly earthed neutral system(see 3.1.11)2)impedance earthed(neutral)system(see 3.1.12).8.2 Routine tests Replace the text of Subclause 8.2 by the following new text:The following tests are routine tests.For details,reference should be made to the relevant subclauses:a)tightness of equipment(9.1);b)capacitance and tan measurement at power-frequency(9.2.2);c)power-frequency or d.c.withstand test(9.2.3);d)measurement of partial discharges(9.2.4);e)resistance measurement if resistance(s)is(are)mounted inside the equipment(9.2.6);f)power-frequency withstand test on low voltage terminal if applicable(9.2.5).The order or possible combination of the tests is not standardized except for the highlighted test in Figure 2.Repeated power-frequency tests should be performed at 80%of the specified test voltage.8.3 Type tests Replace the text of item e)with the following new text:e)d.c.-withstand voltage wet test for outdoor type equipment for d.c.voltage(10.2.1);July 2013 Figure 2 Flow charts test sequence to be applied when performing the type test(Figure 2a)and routine test(Figure 2b)Replace the existing Figure 2 with the following new figure:Electrical routine tests a)DC-Discharge test End of type test c)Lightning impulse Type test Figure 2a Type test IEC 1644/13 i)Polarity reversal test For DC equipment(h)EMC RIV test if applicable Electrical routine tests b)Chopped impulse test DC-coupling and DC-filter AC-applications and DC-dividers Test AC-capacitor DC-capacitor Range I Range II Range I Range II Um 245 kV Um 300 kV USIL 750 kV USIL 750 kV AC wet Required Not required Not required Not required DC wet Not required Not required Required Required SIL wet Not required Required Not required Required Figure 2 Flow charts test sequence to be applied when performing the type test(Figure 2a)and routine test(Figure 2b)Note:specific supplementary tests(for example accuracy,ratio,etc.)are defined in the specific parts.9.2.4.1 Test procedure for equipment(see Annex B)Replace the fourth paragraph of 9.2.4.1 with the following new text:End of the routine tests b)C+tan test (f)AC-test of low voltage terminal(c)a.c.or d.c.test a)Tightness of capacitor Prestress voltage 80%(d)PD test c)a.c.test +d)PD test Method A Method B Figure 2b Routine test IEC 1645/13 Routine test(e)Resistance measurement(if mounted resistance)(e)Resistance measurement(if mounted resistance)c)DC-test(if specified)b)C+tan test July 2013 Procedure B:The partial discharge test is performed after the a.c.or d.c.voltage withstand test.The applied voltage is raised to 80%of the withstand voltage,maintained for not less than 60 s,then reduced without interruption to the specified partial discharge test voltage.For d.c.application,the pre-stress a.c.RMS-voltage is 1,3 UR udring at least 10 s.10.1.2 Discharge test for d.c.coupling/filter capacitor Replace the title and text of Subclause 10.1.2 with the following new title and text:10.1.2 Discharge test and chopped impulse test 10.1.2.1 Discharge test for d.c.coupling/filter capacitor The test may be carried out either on a capacitor stack or on a unit.A voltage shall be applied between the line and earth terminals of a stack or between the terminals of a unit in order to charge the capacitor to a voltage equal to the lightning impulse test voltage.The capacitor shall then be discharged through a rod gap so situated as to obtain the highest discharge frequency.The charging voltage can be positive or negative.The test shall be made twice within 5 min.NOTE 1 This test is intended to check the internal connections of the capacitor.NOTE 2 The capacitor may be charged either by means of a d.c.generator or by an impulse generator,the choice being left to the manufacturer.10.1.2.2 Chopped impulse test for a.c.equipment and d.c.dividers The test shall be carried out on a complete equipment with negative polarity only and combined with the negative polarity lightning impulse test in the manner described below.The voltage shall be a standard lightning impulse as defined in IEC 60060-1,chopped after the crest value has been reached between 2 s and 8 s.The chopping circuit shall be so arranged that the polarity reversal of the recorded impulse shall be limited to 30%of the peak value.The lightning impulse shall be chopped with a suitable gap.NOTE 1 If the front time is longer(see 10.1.3)the chopped time should be adjusted accordingly(after the crest value).The chopped impulse test voltage shall be as mentioned at 6.2.4.The sequence of impulse applications shall be as follows:a)for equipment rated for Um 300 kV one full impulse;two chopped impulses;fourteen full impulses;b)for eq