DAMPING RESISTOR. Customer : ABB Power Technologies AB. Project : RTE. Purchase order : Order acknowledg.
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1 MICROELETTRICA SCIENTIFICA M.S. RESISTANCES MILANO ITALY Pag. 1 di 10 DAMPING RESISTOR Customer : ABB Power Technologies AB Project : RTE Purchase order : Order acknowledg. : O DA Equipment under test :Harmonic Filter Damping Resistor 63kV Ohms (2 paths) - 130,1kW - 325kVBIL 0 Issue G. Coti Ortile Rev. Description Date Prepared Approved
2 MICROELETTRICA SCIENTIFICA M.S. RESISTANCES MILANO ITALY Pag. 2 di 10 Index 1 TEST OBJECT PROCEDURE FOR ROUTINE & HEAT RUN TYPE TEST FOR HARMONIC FILTER RESISTORS...4 ROUTINE TESTS...4 RESISTORS CUBICLES PREPARATION...4 S PROCESS ROUTINE MEASUREMENT AFTER THE GRAPHIC & PICTURES...6
3 MICROELETTRICA SCIENTIFICA M.S. RESISTANCES MILANO ITALY Pag. 3 di 10 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 ) Mr L. MEFTAH ( MICROELETTRICA SCIENTIFICA RESISTANCES ) Mr S. DUMAS ( RTE ) 1 Test object One Damping Resistor in module :dimensions and data as per dwg. CDA Serial number : :O DA / 027 Year of construction :2004 Ohmic value at 20 ºC :2.59 ±5% Nominal Power :130.1 Kw
4 MICROELETTRICA SCIENTIFICA M.S. RESISTANCES MILANO ITALY Pag. 4 di 10 2 PROCEDURE FOR ROUTINE & HEAT RUN TYPE TEST FOR HARMONIC FILTER RESISTORS Routine tests Visual Inspection Dimensional Check Measurement of Insulation Resistance Measurement of Resistance (The resistor can be measured under DC and AC together) Inductance 50 Hz will be avoided due to poor measurement stability for inductance High Potential Test (Dielectric 50Hz 1min) Resistors Cubicles Preparation The resistor will be prepared for the heat run test which means Two resistor cubicles (one phase) will be mounted & stacked on each other Internal connections will be modified by implementing 16 // paths instead of 2 (Original Design) in order to Reach Voltage Level available in the Laboratory The new resistance Value at 20 C will be of 2.59 Ohms for a complete phase. Thermo-couples will be prepared and positioned at places we estimate to be the hottest Additional thermo-couples can be used on customer demand Heat Run Tests Process Preliminary measurement of Resistance at ambient temperature Verification of thermo-couples reading The power will be applied to the resistor (50 Hz) and adjusted to get kw dissipation: The dissipation is calculated from RMS measurements of voltage and current at steady state (power factor is negligible). Calculated Values of Voltage & Current to reach 130,1kW shall be at hot Stage: Voltage: 660 V Current: 197 A Temperature Rise will be directly measured though Thermo-couples Hot Resistance Value will be calculated through R = U / I Formula where: R is the Hot Stage Resistance Value U is the stabilized RMS Voltage Value I is the stabilized RMS Current Value
5 MICROELETTRICA SCIENTIFICA M.S. RESISTANCES MILANO ITALY Pag. 5 di 10 3 Routine test Report See data sheet enclosed- N ORT Heat Run Test U is the stabilized RMS Voltage Value: Volt I is the stabilized RMS Current Value: A Measured temperature: 335 C t = 306 C R is the Hot Stage Resistance Value: = /195.8 = 3.42 Ohms R = 3.42 / 2.583= 32.3% ( Variation between cold and hot stage ) Measured Value at hot stage for complet Resistor: R = (3.42*16*8 ) / 2= Ohms Theoric Value : Rth = Ohms ±5% (limit values are Ohms to 203.3Ohms ) Test results : Passed 5 Measurement after the Heat Run Test Measured total value at ambient temperature R 1 : Ohms Ambient temperature t amb : 33 C Rmax=2.720 ohms Rmin=2.461 ohms Test results : within acceptance limits
6 MICROELETTRICA SCIENTIFICA M.S. RESISTANCES MILANO ITALY 6 Graphic & Pictures Pag. 6 di 10
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8 MICROELETTRICA SCIENTIFICA M.S. RESISTANCES MILANO ITALY Pag. 8 di 10
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0.8 U N /0.5 U N 0.8 U N /0.5 U N 0.8 U N /0.5 U N 0.2 U N /0.1 U N 0.2 U N /0.1 U N 0.2 U N /0.1 U N
55 Series - General purpose relays 7-10 A Features 55.12 55.13 55.14 Printed circuit mount, general purpose 2, 3 & 4 Pole relays 55.12-2 Pole 10 A 55.13-3 Pole 10 A 55.14-4 Pole 7 A AC coils & DC coils
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H/L = Power supply. FN = Nominal Frequency. RN = Rated value of output burden. UN = Nominal input voltage. IN = Nominal input current.
Application : The transducer RISH CON - CA/CV (Fig.1) converts a sinusoidal AC Current or AC Voltage into a load independent DC Current or a load independent DC Voltage proportional to the measured value.
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