DAMPING RESISTOR. Customer : NOKIAN CAPACITORS. Project : TV61583 Sähköradat. Purchase order : Order acknowledg.
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1 test report nokian.doc BC DA Pag. 1 di 19 DAMPING RESISTOR Customer : NOKIAN CAPACITORS Project : TV61583 Sähköradat Purchase order : Order acknowledg. : O DA Equipment under test : Damping Resistor 22kW - 13A - 130Ω - 250kV Test references : 250kV BIL, HV Terminal to Ground 0 Issue G. Coti Ortile Rev. Description Date Prepared Approved
2 Pag. 2 di 19 Index 1 TEST OBJECT MEASUREMENT OF RESISTANCE AT D.C. CURRENT Measurement before the Lightning impulse voltage withstand test Measurement after the Lightning impulse voltage withstand test LIGHTNING IMPULSE VOLTAGE WITHSTAND TEST TEST CONFIGURATION LIGHTNING IMPULSE WITHSTAND LEVEL (LIWL) SPECIFIED TESTS TEST CIRCUIT HIGH VOLTAGE TERMINAL TO GROUND Calibration (Positive and negative polarity) Tests results INSTRUMENTS LIST USED FOR THE ABOVE MEASUREMENTS/TESTS ENCLOSURES...6
3 Pag. 3 di 19 The test on a complete unit was carried out on at MICROELETTRICA SCIENTIFICA. Test performed by : Mr. M. Cervelli ( MICROELETTRICA SCIENTIFICA ) Test witnessed by : Mr T. Ortile ( MICROELETTRICA SCIENTIFICA ) Test results : Passed 1 Test object One Damping Resistor in module :dimensions and data as per dwg. CDA Serial number : :O DA / 001 Year of construction :2004 Ohmic value at 20 ºC :124 ±5% Nominal current :13 A Lightning impulse withstand levels High voltage terminal to ground : 250 kv crest 2 Measurement of resistance at d.c. current Measurement before the Lightning impulse voltage withstand test Measured total value at ambient temperature R 1 : Ohm (limit values are to Ohm) Ambient temperature t amb : 19 C Test results :within acceptance limits Measurement after the Lightning impulse voltage withstand test Measured total value at ambient temperature R 1 : Ohm Ambient temperature t amb : 20 C Test results : within acceptance limits
4 Pag. 4 di 19 3 Lightning impulse voltage withstand test 3.1 Test configuration Withstand impulse voltage tests according to the following configuration : 3.2 Lightning impulse withstand level (LIWL) HV-G High voltage terminal to ground 250 kv crest 3.3 Specified tests 1 reduced wave, positive and negative polarity 15 full waves, positive and 15 negative
5 Pag. 5 di Test circuit Cg Rf Rc Cc Sp R Osc Cg Capacitors banks 8 x 0.5 µf kv (DUCATI) Rc Tail resistor see Rf Front resistor see Cc Capacitor divider 3000 pf kv ( ICAR ) Sp Sphera gap No two balls Ø 250 mm Osc Oscilloscope HP54645A/D ( HEWLETT PACKARD ) R Test object
6 Pag. 6 di High voltage terminal to ground Calibration (Positive and negative polarity) Sphere distance 46 mm Tail resistor (Rc) 4991 Ohm Front resistor (Rf) 186 Ohm Atmosferic pressure 1012 hpa Air temperature 19 C Correction factor Peak voltage 123 kv Front time 1.38 µs (diagram nr. 48) Tail time µs (diagram nr. 49) Voltage divider ratio ( kv / V ) Tests results Crest A: Passed ( ) Failed (x) Polarity voltage requested B: Oscillogram number C: Crest voltage A Positive 250 kv B C A Negative 250 kv B C Instruments list used for the above measurements/tests Digital ohmmeter CROPICO Mod. D04A No Checked on Due date /8.11/03 Digital multimeter ABB METRAWATT Mod. MA5D No Checked on Due date Digital multimeter ABB METRAWATT Mod. MA5D No Checked on Due date Oscilloscope HEWLETT PACKARD Mod A/D No Checked on Due date Enclosures Diagram 48 to 54, Lightning impulse voltage withstand test H.V. to Ground Negative polarity. Diagram 55 to 59, Lightning impulse voltage withstand test H.V. to Ground Positive polarity.
7 Pag. 7 di 19 diagramma 48
8 Pag. 8 di 19 diagramma 49
9 Pag. 9 di 19 diagramma50
10 Pag. 10 di 19 diagramma51
11 Pag. 11 di 19 diagramma 52
12 Pag. 12 di 19 diagramma 53
13 Pag. 13 di 19 diagramma 54
14 Pag. 14 di 19 diagramma 55
15 Pag. 15 di 19 diagramma 56
16 Pag. 16 di 19 diagramma 57
17 Pag. 17 di 19 diagramma 58
18 Pag. 18 di 19 diagramma 59
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