Results 21 to 30 of about 4,011 (301)

New two chamber transfer switch for 6500 A commutation current

Global Energy Interconnection, 2018
HVDC transfer switches are used in different locations in electrode lines of HVDC transmission systems for their reconfigurations. They have to carry and commutate currents to the overload currents of HVDC transmission systems, which increased to 6,400A ...
Lutz-Rüdiger Jänicke, Jörg Teichmann, Shibani Bose, Weidong Han, Xiaoming Wang   +4 more
doaj   +1 more source

Optical fiber imaging for high speed plasma motion diagnostics: applied to low voltage circuit breakers [PDF]

, 2010
An integrated portable measurement system is described for the study of high speed and high temperature unsteady plasma flows such as those found in the vicinity of high current switching arcs.
Tribulato, G., Cross, K.J., A. Balestrero, J. W. McBride, G. Tribulato, K. J. Cross, L. Ghezzi, McBride, J.W., Balestrero, A., Ghezzi, L.   +9 more
core   +1 more source

Research on circuit breaker failure protection and the secondary accelerated fault isolation scheme of VSC-HVDC grids

Frontiers in Energy Research, 2023
When the direct current circuit breaker (DCCB) fails to operate, the fault range will further expand, endangering the safe operation of the power gird.
Andi Li, Botong Li, Weijie Wen, Bin Li, Xiaolong Chen   +4 more
doaj   +1 more source

The energetics of gas flow and contact erosion during short circuit arcing [PDF]

, 2004
The processes governing the movement of short circuit arcs in circuit breakers are complex and variable and the detailed understanding of these processes is incomplete.
Weaver, P.M., Pechrach, K., McBride, J.W.   +2 more
core   +1 more source

Structural diagram of high-voltage circuit breaker.

, 2023
Structural diagram of high-voltage circuit breaker.
Yucheng Zhang (136327), Zhaoxing Ma (17537618), Haihua Zhang (375534), Zhengxi Yuan (14596244), Hao Chen (5190), Chenlei Han (17537615)   +5 more
core   +1 more source

Arc motion and gas flow in current limiting circuit breakers operating with a low contact switching velocity [PDF]

, 2002
Arc motion in low voltage (240 VAC) high current (10/sup 3/-10/sup 4/A.) current limiting-circuit breakers is dominated by arc root mobility. The mobility is influenced by the gas flow and gas composition in the contact region, but there is little ...
Weaver, P.M., Pechrach, K., McBride, J.W.   +2 more
core   +1 more source

Research on the Reliability Test and Life Assessment Methods of Relays Used in Circuit Breaker Operating Mechanism

, 2023
As one of the key components of the circuit breaker operating mechanism, the relay can experience performance degradation due to harsh environmental factors, such as salt spray, during operation, which can ultimately affect the normal operation of the ...
Chao Gao, Fusheng Zhou, Hongming Ma, Sijia Zhou, Yun Yang, Hao Yang   +5 more
core   +1 more source

Controllable reactor based hybrid HVDC breaker [PDF]

, 2020
© 2020 BMJ Publishing Group. All rights reserved. Short circuit fault occurrence in high-voltage DC (HVDC) systems causes extremely high currents in a fast raising time that does not experience current zero-crossing. To protect HVDC systems/grids against
Rouzbehi, K, Heidary, A, Bigdeli, M
core   +1 more source

Influence of single-phase circuit breaker tripping on inverter commutation

电力工程技术, 2022
If commutation failure does not occur when single-phase high resistance grounded in single-circuit AC line of inverter,then single-phase circuit breaker tripping may lead to commutation failure.
SONG Xinfu, MA Xing, LI Fengting, YIN Chunya, XIE Chao   +4 more
doaj   +1 more source

Arc root mobility on piezoelectrically actuated contacts in miniature circuit breakers [PDF]

, 2005
A novel contact opening mechanism has been developed using a piezoelectric actuator to open the contacts in a low contact opening velocity circuit breaker.
Weaver, P.M., Paul M. Weaver, Pechrach, K., Kesorn Pechrach, McBride, J.W., John W. Mcbride   +5 more
core   +1 more source