scholarly journals Improving interruption performance of mechanical circuit breakers by controlling pre‐current‐zero wave shape

High Voltage ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 122-129 ◽  
Author(s):  
Tim Schultz ◽  
Benjamin Hammerich ◽  
Lorenz Bort ◽  
Christian M. Franck
Keyword(s):  
Wave Shape ◽  
Circuit Breakers ◽  
Current Zero ◽  
Mechanical Circuit

scholarly journals Post-Arc Characteristics of High-Current Arcs in Vacuum Circuit-Breakers

2019 ◽  
Vol 6 (2) ◽  
pp. 170-174
Author(s):  
N. Wenzel ◽  
W. Haas
Keyword(s):  
Short Circuit ◽  
Early Period ◽  
Metal Vapor ◽  
Transverse Magnetic ◽  
High Current ◽  
Electric Resistance ◽  
Circuit Breakers ◽  
Arc Characteristics ◽  
Current Zero ◽  
Short Circuit Currents

The post-arc (PA) characteristics of vacuum arcs in transverse magnetic field contacts are studied for short-circuit currents of up to 123 kA peak and transient recovery voltages below 875 V. The measured PA currents are interpreted in terms of an Electric Resistance Model and the models of Andrews-Varey, Langmuir-Child, and Slepian-Schmelzle. Whereas in the late PA period, the calculations do not agree well with the measurements, the PA behavior is well described in the early period after current-zero. It is concluded that the PA discharge is amplified by ionization of metal vapor particles in the boundary sheath due to electron impact.

Investigation on the current-zero characteristic of vacuum circuit breakers

Vacuum ◽  
2016 ◽  
Vol 134 ◽  
pp. 63-68 ◽  
Author(s):  
Guowei Ge ◽  
Minfu Liao ◽  
Xiongying Duan ◽  
Zhihui Huang ◽  
Jinqiang Huang ◽  
...  
Keyword(s):  
Circuit Breakers ◽  
Zero Characteristic ◽  
Current Zero

A physical arc model for the simulation of current zero behavior of high-voltage circuit breakers

1992 ◽  
Vol 7 (2) ◽  
pp. 1016-1022 ◽  
Author(s):  
L. van der Sluis ◽  
W.R. Rutgers ◽  
C.G.A. Koreman
Keyword(s):  
High Voltage ◽  
Circuit Breakers ◽  
Arc Model ◽  
Current Zero

Performance of Series-Compensated Line Circuit Breakers Under Delayed Current-Zero Conditions

1997 ◽  
Vol 17 (1) ◽  
pp. 48-49
Author(s):  
Que Bui-Van ◽  
B. Khodabakkchian ◽  
M. Landry ◽  
J. Mahseredjian ◽  
J. Mainville
Keyword(s):  
Circuit Breakers ◽  
Current Zero

scholarly journals Formation of the Upstream Region in HV Gas Blast Interrupters with Synchronous Gas Injection

2019 ◽  
Vol 6 (1) ◽  
pp. 43-46 ◽  
Author(s):  
N. K. Kurakina ◽  
V. Ya. Frolov ◽  
E. N. Tonkonogov
Keyword(s):  
Gas Dynamics ◽  
Electrical Contact ◽  
Gas Injection ◽  
Upstream Region ◽  
Font Size ◽  
Circuit Breakers ◽  
Nozzle Throat ◽  
Flow Interactions ◽  
Calculation Results ◽  
Current Zero

The problem of a synchronous gas injection at the vicinity of current zero for high voltage gas blast circuit breakers~(GCB) is discussed. The basic aim of the investigation is to improve the efficiency of arc quenching in GCB by increasing interruption ability without changes in drive parameters. The paper reviews the upstream region influence on the interruption capability, gas injection - mass flow interactions at the region between electrical contact and nozzle throat of GCB. <br />Numerical simulation is used to calculate gas--dynamics parameters at the upstream region of mono--flow GCB. The mass discharged as a result of the synchronous gas injection can rapidly modify both the density and pressure at the nozzle throat, regulate flow velocity in the research region. The selected method of the gas injection effects the breaking performance in the arc quenching device strongly. Some calculation results are presented.<br /><p class="western" style="margin-top: 0.1cm; margin-bottom: 0.1cm; line-height: 100%;"> </p><!-- p { margin-bottom: 0.25cm; direction: ltr; color: rgb(0, 0, 10); line-height: 120%; text-align: left; }p.western { font-family: "Liberation Serif", serif; font-size: 12pt; }p.cjk { font-family: "Noto Sans CJK SC Regular"; font-size: 12pt; }p.ctl { font-family: "FreeSans"; font-size: 12pt; } -->

scholarly journals Post-arc Current Measurement in Mechanical Circuit Breakers for Hvdc Applications

2017 ◽  
Vol 4 (2) ◽  
pp. 137-140 ◽  
Author(s):  
T. Schultz
Keyword(s):  
Measurement System ◽  
High Power ◽  
Circuit Breaker ◽  
Current Measurement ◽  
Circuit Breakers ◽  
Arc Current ◽  
Mechanical Circuit

Post-arc currents contain valuable information on the breaker’s performance. In this paper, the dimensioning procedure for a measurement system for such currents, based on a diode clamped shunt resistor is presented. Based on synthetic low and high power tests, the performance of a mock-up is evaluated. Finally, the post-arc current of a model gas circuit breaker, designed for use in DC applications, is measured.

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