Search results for: CURRENT MERGER

• Behavior of residual current devices at earth fault currents with DC component

  Publication

  • S. Czapp
  • H. Tariq
  • S. Cieślik

  - SENSORS - Year 2022

  Low-voltage electrical installations are increasingly saturated with power electronic converters. Due to very high popularity of photovoltaic (PV) installations and the spread of electric vehicles (EV) as well as their charging installations, DC–AC and AC–DC converters are often found in power systems. The transformerless coupling of AC and DC systems via power electronic converters means that an electrical installation containing...

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• NERTER

  Journals

  ISSN: 1575-8621

• MESTER

  Journals

  ISSN: 0160-2764

• Ledger

  Journals

  eISSN: 2379-5980

• Improving sensitivity of residual current transformers to high frequency earth fault currents

  Publication

  • S. Czapp
  • K. Dobrzyński
  • J. Klucznik
  • Z. Lubośny
  • R. Kowalak

  - Archives of Electrical Engineering - Year 2017

  For protection against electric shock in low voltage systems residual current devices are commonly used. However, their proper operation can be interfered when high frequency earth fault current occurs. Serious hazard of electrocution exists then. In order to detect such a current, it is necessary to modify parameters of residual current devices, especially the operating point of their current transformer. The authors proposed...

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• Testing sensitivity of A-type residual current devices to earth fault currents with harmonics

  Publication

  • S. Czapp

  - SENSORS - Year 2020

  In many applications, modern current-using equipment utilizes power electronic converters to control the consumed power and to adjust the motor speed. Such equipment is used both in industrial and domestic installations. A characteristic feature of the converters is producing distorted earth fault currents, which contain a wide spectrum of harmonics, including high-order harmonics. Nowadays, protection against electric shock in...

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• Modification of the operating point of residual current transformers for high frequency earth fault currents detection

  Publication

  • S. Czapp
  • K. Dobrzyński
  • J. Klucznik
  • Z. Lubośny
  • R. Kowalak

  - Year 2016

  For protection against electric shock in low voltage systems residual current devices are commonly used. However, their proper operation can be interfered when earth fault current with high frequency components occurs. Serious hazard of electrocution exists then. One of the most important element of residual current devices is a residual current transformer with iron core. Tripping characteristic of residual current devices strictly...

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• Marges linguistiques

  Journals

  ISSN: 1626-3162

• CURRENT PSYCHOLOGY

  Journals

  ISSN: 1046-1310 , eISSN: 1936-4733

• CURRENT MEDICINAL CHEMISTRY

  Journals

  ISSN: 0929-8673 , eISSN: 1875-533X