Results 71 to 80 of about 8,357 (239)
Protection against lightning and overvoltage
, 2005 Tato bakalářská práce se zabývá ochranou technických prostředků pro ochranu majetku před bleskem a přepětím. V práci jsou uvedeny legislativní podmínky pro použití přepěťových ochran.
Horák, Martin
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Review of Catenary Icing on High‐Speed Railways: Characteristics, Impact and Countermeasures
High Voltage, EarlyView.ABSTRACT The pantograph–catenary system (PCS) is the only path for electrified railway trains to acquire energy. Catenary icing during winter is a common natural phenomenon, which usually leads to the deterioration of the current quality and severely affects the operational safety of trains.
Zheng Li +7 more
wiley +1 more source
Analysis of overvoltage protection in HVDC
, 2016 Analyse the Overvoltage protection in HVDC transmission line caused by lightning strike in various location and use surge arrester to suppress the overvoltage caused by lightning strike.
Viswanathan, Suresh Kumar
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Overvoltage protection in industrial power distribution
, 2017 Sähköverkkojen ylijännitteet aiheuttavat laitevahinkoja ja keskeytyskustannuksia. Kustannuksien vähentämiseksi sähköverkon osia suojataan ylijännitesuojilla, joilla pyritään minimoimaan verkon komponentteihin kohdistuvat vahingot.
Paju, Jussi-Mikko
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Applied SciencesWhen the electric locomotive pantograph is dropping, the interruption of pantograph catenary contact causes electromagnetic oscillation and arcing. The frequent arc burning that occurs due to charge accumulation results in the amplitude of overvoltage ...
Dazuo Jiang +5 more
doaj +1 more source
High Voltage, EarlyView.ABSTRACT The double‐break vacuum circuit breakers (VCBs) that utilize series break technology effectively increase the switching capability for capacitive currents, elevate the withstand voltage level, and reduce the likelihood of restrike, all without compromising the breaking capacity for short‐circuit currents.
Yun Geng +6 more
wiley +1 more source
High Voltage, EarlyView.ABSTRACT To effectively suppress transient overvoltages in HVDC systems, the design and experimental validation of a multi‐module series controllable arrester are presented. The voltage‐limiting performance, series voltage equalisation capability, and robustness under fault conditions in high‐voltage scenarios require further research.
Tai Yang +4 more
wiley +1 more source
Novel method for restraining 35 kV shunt reactor switching overvoltage – phase controlled breaker
The Journal of Engineering, 2019 Phenomena such as current chopping, arc reignition and equivalent current chopping might appear when cutting off shunt reactor. Overvoltage caused by switching will lead to interphase fault in related equipment and inter-turn insulation damage in the ...
Yiming Zheng +5 more
doaj +1 more source
OVERVOLTAGE PROTECTION IN ELECTRIC INSTALLATIONS
, 2010 V diplomski nalogi sem obdelal osnovne probleme prenapetostne zaščite v električnih napeljavah. Prenapetostne zaščite sem obdelal z novimi predpisanimi standardi, ki opisujejo pravilno načrtovanje prenapetostnih zaščit.
Resnik, Rok
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Research on overvoltage and fault of a UHV AC/DC hybrid system
The Journal of Engineering, 2019 In view of the overvoltage problem of an ultra-high-voltage DC (UHVDC) AC/DC hybrid system, this study analyses the overvoltage condition under various fault types and gives the identification criterion of the overvoltage form. Firstly, the model of the
Yali Wang +3 more
doaj +1 more source