Method of diagnostics of the short-circuited rotor damage on point induction converters

Andreyeva, Oxana; Neftissov, Alexandr; Mileiko, Alena

doi:10.1063/5.0046565

Cited by 10 publications

(2 citation statements)

References 7 publications

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“…Validation of formulas and errors. To check the efficiency of the method and the correctness of the formulas derived by solving the system of equations ( 4), mathematical modeling was carried out to determine the magnitude of the total short-circuit shock current SC [16]. For this, using MS Excel, the short-circuit current of an electrical installation with the presence of an aperiodic component was simulated.…”

Section: Determination Of the Error And Speed Of The Proposed Solution For Determining Shock Current Using Reed Switches And A Microprocementioning

confidence: 99%

“…Four reed switches 1, 2, 3 and 4 are installed in the inductor 5, which is made of the winding of a power transformer with a window size of 100×150 mm, the cross-section of the winding wire is 0.5 mm 2 . Matrix APS6100 is connected to the network and the required voltage is set at its output [16]. Then the circuit is closed using the SB button, and current is supplied to inductor 5.…”

Section: Determination Of the Error And Speed Of The Proposed Solution For Determining Shock Current Using Reed Switches And A Microprocementioning

confidence: 99%

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Determination of the magnitude of short-circuit surge current for the construction of relay protection on reed switches and microprocessors

Neftissov

Biloshchytskyi

Talipov

et al. 2021

EEJET

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A study of the functioning of reed switches under the influence of a magnetic field created by a current in a conductor in a transient mode with the presence of an aperiodic component has been carried out. A well-known method for determining current using reed switches was implemented. At the same time, it was determined that the originally formulated method did not give the required result within the limits of errors. This is most likely due to the peculiarities of the mechanism of movement of the reed switch contacts. Alternatively, the measurements were taken to take the return currents instead of the pick-up currents and the time between the return times. They are more stable. Simulation is performed, experimental determination of the value of surge current by measuring time is carried out. The main element of the created installation was the power transformer coil with low active and high inductive resistance. As part of the study, the reed switches were placed in a magnetic field with an aperiodic component, as in the transient mode. This study will show the applicability of reed switches for the construction of relay protection devices that will not need current transformers to obtain information about the primary current in the conductor. In the course of the research, it was found that the error in determining the magnitude of current was no more than 10 %. Using microprocessors, it is possible to build relay protection devices with a speed of up to 20 ms. This result makes it possible to build new devices. Since in the well-known developments, it was only said about determining the magnitude of current in a steady state. When building relay protection devices on reed switches, without using current transformers, it will be possible to build backup protections that duplicate not only the devices themselves, but also the primary measuring transformers with other sensitive elements. This will improve the reliability of the power supply.

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Section: Determination Of the Error And Speed Of The Proposed Solution For Determining Shock Current Using Reed Switches And A Microprocementioning

confidence: 99%

Section: Determination Of the Error And Speed Of The Proposed Solution For Determining Shock Current Using Reed Switches And A Microprocementioning

confidence: 99%