Breaking performance of a circuit breaker influenced by a permanent magnetic field at DC voltages up to 450 V

Schrank, Thorsten; Wilkening, Ernst-Dieter; Kurrat, Michael; Gerdinand, Frank; Meckler, Peter

doi:10.1049/cp.2012.0618

Cited by 10 publications

(5 citation statements)

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“…The metal type arc chute promotes the arc voltage by splitting the arc into several partial arcs, which means more cathode falls are generated and connected in series. Thus, the sum of the partial arc voltage can be far higher than the voltage of a single arc at the same length [17], noting that the arc voltage of each short partial arc is around 15 ~ 20 V [18]. The comparison between the three testing conditions is shown in Table I.…”

Section: Discussionmentioning

confidence: 99%

Effect of Arc Chute on DC Current Interruption by Liquid Nitrogen in HTS Electrical System of Distributed Propulsion Aircraft

Xiang

Song

et al. 2021

IEEE Trans. Appl. Supercond.

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The distributed propulsion aircraft with HTS electrical system is a novel concept for future airliners, which can reduce by more than 70% fuel burn and NOx emissions. The circuit breakers ensure the security of this novel aircraft by isolating electrical faults timely. Solid-state circuit breakers (SSCBs) are preferred due to their fast response and high performance in the cryogenic circumstance. However, the high conduction loss of SSCBs impedes their further application. A mechanical switch using liquid nitrogen (LN2) as an arc extinguishing medium shows excellent DC current interruption performance. The LN2 switch is characterized with extremely low contact resistance, and the proper use may reduce the conduction loss of power switches significantly. Nevertheless, the effect of metal type arc chutes on the arcing process in the LN2 is still not clear. Thus the objective of this paper is to understand the effect of metal type arc chutes on the current interruption performance of LN2. Silicon iron arc chutes are employed. Neodymium (NdFeB) magnets are used to stretch the arc into the arc chutes. The maximum interrupting current is 1 kV/ 2 kA when only magnets are applied. Further applying the arc chutes leads to a significant drop in the arc voltage and interruption performance. Since the high relative permeability of silicon iron weakens the magnetic field acting on the arc, metal type arc chutes are not recommended. 1 kV / 10 kA fault current is successfully cleared by the combination of resistance type superconducting fault current limiter (R-SFCL) and LN2 switch with magnets, during which the R-SFCL responds to the fault within 420 μs, compensating the long clear time of the LN2 switch.

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Section: Discussionmentioning

confidence: 99%

Effect of Arc Chute on DC Current Interruption by Liquid Nitrogen in HTS Electrical System of Distributed Propulsion Aircraft

Xiang

Song

et al. 2021

IEEE Trans. Appl. Supercond.

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“…Solution III is a gas-filled (80% H 2 /20% N 2 ) model DC-contactor [34]. Solution IV is an air switch with permanent magnet [35].…”

Section: Advantages Of This Novel Current Interruption Technology In ...mentioning

confidence: 99%

Novel DC current interruption technology based on the instability of vacuum arc under composite transverse magnetic fields

Liu

Chen

et al. 2021

IET Generation Trans & Dist

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The objective of this work intends to propose a novel current interruption technology in vacuum for LVDC power systems, based on the instability of vacuum arc under composite transverse magnetic fields (TMFs). The interruption characteristics were experimentally determined in an overdamping C‐L‐R circuit. The experimental results indicated that the DC current of 800 V/500 A could be successfully interrupted within 5 ms by the proposed technology. Moreover, the interruption process could be divided into two stages, the Stable and Unstable stages. In the Stable stage, the arc voltage linearly increased from 20 to 35 V, where the arc current was limited slightly. In the Unstable stage, the arc voltage would rapidly increase and exceed the supply voltage, where the current would be forced to zero. Finally, the double‐break LVDC vacuum switches, no matter in series or parallel, were difficult to improve the interruption capability, because of the asynchronous occurrence of the Unstable stage in series vacuum interrupters and the fast current‐commutation between parallel vacuum interrupters. This technology takes advantages of high interruption capability, short arcing time and low complexity, which is a promising solution to expand the application of vacuum switch to the LVDC power systems.

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“…Switchgear for high current DC requires special measures to interrupt the electric arc that is inevitably established when opening contacts under load. Such means include permanent magnets and conductive plates to elongate and split up the arc, resulting in expensive and bulky switches [5].…”

Section: Security and Safety System Designmentioning

confidence: 99%

“…Simplified overview of the SEEDs[5] 380 VDC micro grid, prepared for a ±380 VDC grid extension. The centralized system with the DC-Grid-Manager is only a part of this grid.…”

mentioning

confidence: 99%

Overview of different topologies and control strategies for DC micro grids

Wunder

Ott

Kaiser

et al. 2015

2015 IEEE First International Conference on DC Microgrids (ICDCM)

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Overview, comparison and evaluation of common DC micro grid design considerations. The focus of this paper is to explore the main differences and advantages/disadvantages of various topologies and control strategies for DC micro grids. The requirements of various application areas can strongly influence the individual system design. Control strategies, single- or two-phase designs, earthing concepts, system voltages and power levels are discussed as well

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Breaking performance of a circuit breaker influenced by a permanent magnetic field at DC voltages up to 450 V

Cited by 10 publications

References 0 publications

Effect of Arc Chute on DC Current Interruption by Liquid Nitrogen in HTS Electrical System of Distributed Propulsion Aircraft

Effect of Arc Chute on DC Current Interruption by Liquid Nitrogen in HTS Electrical System of Distributed Propulsion Aircraft

Novel DC current interruption technology based on the instability of vacuum arc under composite transverse magnetic fields

Overview of different topologies and control strategies for DC micro grids

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