Results 211 to 220 of about 33,512 (259)
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External impedance vs. short-circuit currents
Electrical Engineering, 1934Effects of external impedance on short-circuit currents in synchronous machines and in networks are discussed in this article. The material presented is not claimed to be new; its chief value lies in the confirmation of calculations by test results, which tends to increase confidence in formulas previously developed.
B. L. Robertson, T. A. Rogers
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Short-circuit current of induction motors and generators
Journal of the American Institute of Electrical Engineers, 1921There has been a rather prevailing opinion that a sudden short circuit of an induction generator would not cause a serious initial rise in current such as occurs in synchronous generators. This has led to the proposal of the use of such machines as a partial solution of the short-circuit problem on a-c. systems.
R. E. Doherty, E. T. Williamson
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Short circuit current in tight and leaky epithelia
Biochimica et Biophysica Acta (BBA) - Biomembranes, 1978The effect of short circuit current on the unidirectional fluxes of ions transported across tight and leaky epithelia was investigated. It was found that short circuiting of the frog gastric mucosa (classified as a tight epithelium) caused a decease of the passive JClms and a significant increase of the net Cl- secretion. However, no significant change
M A, Dinno, K C, Huang
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Short-circuit current calculations for DC systems
Proceedings of 1994 IEEE Industry Applications Society Annual Meeting, 1996The aim of the paper is to describe the methods contained in the International Electrotechnical Commission (IEC) draft standard "Calculation of short-circuit currents in DC auxiliary installations in power plants and substations", and to test them using the dynamic computer simulation.
BERIZZI, ALBERTO +3 more
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Effects of short-circuit currents
2005Calculation 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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Short-circuit currents and recovery voltages
Electrical Engineering, 1949FIELD 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 +3 more
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Calculation of short-circuit currents
2011The 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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Limitation of short-circuit currents
2005The 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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The short-circuited fluxgate output current
Journal of Physics E: Scientific Instruments, 1989The 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 +3 more
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Factors for the calculation of short-circuit currents
2005Several 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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