Single-Phase Earth-Fault Protection of Power Cable of a Salt-Producing Floating Platform
Novozhilov A. Issabekov Z. Novozhilov T. Issabekova B. Tyulyugenova L.
October 2025Multidisciplinary Digital Publishing Institute (MDPI)
Energies
2025#18Issue 19
In this paper, a method to improve the protection of a four-core power cable of a salt-producing floating platform equipped with an automatic breaker with an independent tripping mechanism is suggested. The use of this automatic breaker in combination with a suggested protection device ensures reliable protection of not only the power cables of the platform against all faults but also the personnel of the platform and animals on the reservoir banks against electric shock in the event of a single-phase ground fault in reservoir water. This would be possible due to a voltage sensor made in the form of a metal ring on the power cable and a relay; one terminal of the relay winding is connected to the voltage sensor by a single-core control cable, and the other to the neutral of a power source on the platform. The typically open contacts of this relay are connected to an electric circuit which includes a power source and a coil for an independent tripping mechanism of the automatic breaker. This design ensures reliable operation of the suggested protection device in the event of a single-phase ground fault in the power cable of the platform when underwater cable insulation is damaged.
automatic breaker , floating platform , four-core cable , neutral , protection system , relay , voltage sensor
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Faculty of Energy, Department of “Electric Power Engineering”, Toraighyrov University, Building A, Lomov Str., 64, Pavlodar, 140008, Kazakhstan
Power Engineering Institute, Department of “Power Supply of Industrial Enterprises”, Omsk State Technical University, Mira Av., 11, Omsk, 644050, Russian Federation
Faculty of Energy
Power Engineering Institute
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