Volume 3 nr 1 / 2011 - Academia Oamenilor de Stiinta din Romania

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136 Alexandru Ionuț Chiuță, Liviu Mihai Sima, Nicoleta Doriana SecăreanuCapacitive coupling is shown by the disrupted voltage (CCTV system).Upr jCkRipUwhere: Ck= coupling capacityRip= input impedance of disturbed elementIn fig. 2, the disruptive coupling is presented function of the coupling impedanceZC and disturbed route impedance ZNZCZN= coupling impedance= characteristic impedance of the route subject to disturbance4.5. Comments1. - coupling impedance ZC is higher;- CCTV cable characteristic impedance N2. - 1 m of coaxial cable provides [75 pF/m];- 1 cm of grounding route determines [1nH];Z is: 75 4Z .NZ C- mutual inductance between two wires of 100 mm long, spaced at 2 mm,is about 20 nH.Fig. 2. Disruptive coupling functionof the coupling impedance and disturbed route impedance.Copyright © Editura Academiei Oamenilor de Știință din România, 2011Watermark Protected
Disturbances in The Power Supply Network of Bucharest Subway System 1374.6. Disruptive voltages on CCTV transmission cableDisruptive measurement results:U4.6.1. CCTV cable (perturbed route): Dispatcher Unirii station -IMGB DepotPR= disruptive voltage on CCTV cable (receptor)UP= disruptive voltageUPRZNZ ZNCUU 60 mV (statistic)UPRp 75 1 60 ZN U 120 mV (rare)UPRp 75 1 120 ZN U 30 mVPRU 40 mVPRU 70 mVPRU 200 mV (on decoupling)PRZ C =75UP UPRZNFig. 3. CCTV cable (disturbed route): Dispatch Unirii station – IMGB Depot.Copyright © Editura Academiei Oamenilor de Știință din România, 2011Watermark Protected
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3FOREWORDBased on a rich scientific
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Annals of the Academy of Romanian S
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The remanufacturing of an articulat
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Influence of Vibrations and Dynamic
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Products recovery opportunities at
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Products recovery opportunities at
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Recycling and Remanufacturing -Two
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Recycling and Remanufacturing -Two
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The Study of Heavy Metal from Envir
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mg/kg d.wThe Study of Heavy Metal f
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ConclusionsThe Study of Heavy Metal
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Analytical Evaluation of Crack Prop
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Y d Notations:Analytical Evaluation
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General Considerations Regardingthe
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Intelligent Networks, Smart Grids C
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Two-dimensional Modelling of Accide
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Volume 3 nr 1 / 2011 - Academia Oamenilor de Stiinta din Romania

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