Results 261 to 270 of about 872,445 (297)

Short-Circuit Currents of Synchronous Machines

Transactions of the American Institute of Electrical Engineers, 1925
The importance of short-circuit forces in large alternators has warranted an investigation of them. The first step in this investigation, which is discussed in this paper, is the calculation of the short-circuit currents that produce them. The method of solution used is that of the assumption of zero resistance and constant flux linkages which has ...
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Short-circuit currents and recovery voltages

Electrical Engineering, 1949
FIELD tests were made on a 7,200/12,470Y-volt multigrounded rural distribution system to check fault current calculations and to investigate transient recovery voltages experienced as a consequence of clearing fault currents. Tests were also made using a miniature circuit representation of a rural distribution system in order to investigate the effect ...
W. H. Eason, I. B. Johnson, J. W. Kalb, H. A. Peterson   +3 more
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Effects of short-circuit currents

2005
Calculation methods for the thermal and electromagnetic effects of short-circuit currents are dealt with IEC 61660-2, which is applicable to short-circuit currents in d.c. auxiliary installations in power plants and substations and IEC 60865-1, related to three-phase a.c. systems.
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Calculation of short-circuit currents

2011
The current that flows through an element of a power system is a parameter that can be used to detect faults, given the large increase in current flow when a short-circuit occurs. For this reason, a review of the concepts and procedures for calculating fault currents will be made in this chapter, together with some calculations illustrating the methods
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The short-circuited fluxgate output current

Journal of Physics E: Scientific Instruments, 1989
The alternative coupling of short-circuiting the secondary coil of a fluxgate sensor by connecting it to the inverting input of a current amplifier is shown to have significant advantages over the more conventional unloaded or second-harmonic tuned voltage coupling.
F Primdahl, J R Petersen, C Olin, K Harbo Andersen   +3 more
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Limitation of short-circuit currents

2005
The expansion of electrical power systems by new power stations and new lines (overhead transmission lines and cable circuits) results in an increase of short-circuit currents due to an increase in sources feeding the short-circuit and due to a reduction of system impedance. The improvement of existing installations and the replacement of equipment are
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Current-Zero Characteristics of a Vacuum Circuit Breaker at Short-Circuit Current Interruption

2006 International Symposium on Discharges and Electrical Insulation in Vacuum, 2006
High resolution measurements on the post-arc current in vacuum circuit breakers reveal a period, immediately following current-zero, in which the voltage remains practically zero. The most widely used model for simulating the interaction between the post-arc current with the electrical circuit lacks a proper explanation for this event, and hence it ...
E. P. A. van Lanen, R. P. P. Smeets, Marjan Popov, Lou van der Sluis   +3 more
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Factors for the calculation of short-circuit currents

2005
Several factors for the calculation of short-circuit (s.-c.) currents have been introduced in previous sections, the origin of which will be explained within this section. · Voltage factor cmax and cmin for different voltage levels as per Table 4.1. · Correction factor using the %/MVA or the p.u.-system as mentioned in Chapter 2. · Impedance correction
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Short-circuit current ratings of equipment

49th IEEE/IAS Industrial & Commercial Power Systems Technical Conference, 2013
The interrupting rating and short-circuit current rating of equipment is an key consideration for the installation of equipment in electrical distribution systems. To emphasize this consideration, the 2005 National Electrical Code (NEC®) added short-circuit current rating marking requirements for various types of equipment, that previously was not ...
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Investigating the relationship between internal short circuit and thermal runaway of lithium-ion batteries under thermal abuse condition

Energy Storage Materials, 2021
Dongsheng Ren, Xuning Feng, Lishuo Liu
exaly