Application of Modified Passive Insulation Monitors for Selective Earth Fault Location in Live Low Voltage AC IT Circuits

Authors

  • Piotr Olszowiec Independent researcher

DOI:

https://doi.org/10.24136/jeee.2024.003

Keywords:

AC IT networks, diode rectifier, earth fault location, insulation resistance, mean value

Abstract

In the publication there are presented most popular passive methods of continuous insulation monitoring in live low voltage unearthed AC networks. There are given formulas for determination of insulation equivalent resistance for multi-phase networks sources with both symmetrical and asymmetrical voltages. Novel solution of elimination of the most popular measuring scheme’s shortcomings is proposed. New methods of  insulation resistance measurement and  earth fault location based on supervision

References

Hofheinz W.: “Protective Measures with Insulation Monitoring”, VDE Verlag, 1998.

Olszowiec P. Novel Passive Methods of Periodical Insulation Resistance Determination in AC/DC IT Systems JAEEE vol.5, no.1/ 2023

Olszowiec P.: Insulation Measurement and Supervision in Live AC and DC Unearthed Systems, Lecture Notes in Electrical Engineering, 2nd edition, Springer 2014.

Olszowiec P.: O wyznaczaniu napięć trójfazowych prostowników diodowych [Determination of voltages of 3-phase rectifiers]. Wiadomości Elektrotechniczne, 10/2015 (Pol).

Olszowiec P.: Unconventional Methods of Analyzing Diode Rectifiers with Asymmetrical Supply, Computational Problems of Electrical Engineering, 2/2014.

Tsapenko E.F. “Kontrol izolacji w sietiach do 1000 V” [Insulation monitoring in networks up to 1000 V]. Moscow, Energia, 1972 (in Russian).

Tsapenko E.F. Zamykania na ziemliu w sietiach 6-35 kV [Earth faults in networks 6-35 kV]. Moscow, Energoatomizdat, 1986 (Rus).

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Published

2024-05-21

Issue

Section

Articles