Wyniki wyszukiwania dla: ECO CURRENCY

• Eco-Engineering

  Czasopisma

  ISSN: 1347-0485 , eISSN: 1880-4500

• Geo-Eco-Trop

  Czasopisma

  ISSN: 1370-6071

• Geo-Eco-Marina

  Czasopisma

  ISSN: 1224-6808

• ECS Transactions

  Czasopisma

  ISSN: 1938-5862 , eISSN: 1938-6737

• Chinese Journal of Eco-Agriculture

  Czasopisma

  ISSN: 1671-3990

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

  Publikacja

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

  - SENSORS - Rok 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...

  Pełny tekst do pobrania w portalu

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

  Publikacja

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

  - Archives of Electrical Engineering - Rok 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...

  Pełny tekst do pobrania w portalu

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

  Publikacja

  • S. Czapp

  - SENSORS - Rok 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...

  Pełny tekst do pobrania w portalu

• Joint Analysis of National Eco-Efficiency, Eco-Innovation and SDGs in Europe: DEA Approach

  Publikacja

  • Ł. Brzezicki
  • I. Łącka

  - Technological and Economic Development of Economy - Rok 2022

  The growing complexity and intertwining of different socio-economic issues both in individual countries and internationally mean that single-theme analyses do not consider all the relationships and thus have cognitive limitations. Therefore, studies that combine several research areas are increasingly common in the literature to clarify the connections and relationships. In this study, considering the sequential nature of the...

  Pełny tekst do pobrania w portalu

• JOINT ANALYSIS OF NATIONAL ECO-EFFICIENCY, ECO-INNOVATION AND SDGS IN EUROPE: DEA APPROACH

  Publikacja

  • I. Łącka
  • Ł. Brzezicki

  - Technological and Economic Development of Economy - Rok 2022

  Pełny tekst do pobrania w serwisie zewnętrznym