Results 251 to 260 of about 447,699 (304)

Overcurrent and earth fault protection

1993
Fuses are a very satisfactory form of protection for the lower voltage and current sections of power networks because their operating time/current characteristics are similar in form to the withstand time/current characteristics of the circuits they protect.
C. Christopoulos, A. Wright
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Earth fault distance protection

IET Conference Publications, 2009
Earth fault distance protection with distance protection relays is common practice in solidly grounded networks. However, in compensated networks earth faults can cause big problems, because they do not extinguish themselves. To find the fault point is from high interest also in combination with network expansion. In previous investigations the authors
G. Achleitner, L. Fickert, C. Obkircher, M. Sakulin   +3 more
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Earth fault protections with sensors

22nd International Conference and Exhibition on Electricity Distribution (CIRED 2013), 2013
Earth faults are the most common type of fault in medium voltage networks. Earth fault (EF) protection based on residual current detection is therefore the basic protection used in protection systems. Since small isolated and compensated MV networks with low levels of earth fault currents are now increasing in popularity, the use of earth fault ...
M. Celko, V. Prokop
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Fault analysis and protection of a microgrid

2008 40th North American Power Symposium, 2008
As penetration of distributed generation (DG) increases at the distribution level, managing these systems effectively becomes increasingly challenging. One proposed way to manage these systems is through the adoption of microgrids. A microgrid is a distribution level network made of several loads and DG sources that operate as a single aggregate load ...
E. Sortomme, G. J. Mapes, B. A. Foster, S. S. Venkata   +3 more
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A Study on the Digital Protective Relay for Generator Fault Protection

Journal of the Korean Society of Marine Engineering, 2009
As power facilities are getting higher at capacity, the monitoring and diagnosis of generators for fault detection and protection has attracted intensive interest. In case of an after-fault in high capacity rotating machines, the recovering cost is usually very expensive and additional time is necessary for returning in a normal situation.
Nak-Won Jang, Jeong-Do Park, Sung-Hwan Lee   +2 more
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Preventive arc fault protection

2001 IEEE/PES Transmission and Distribution Conference and Exposition. Developing New Perspectives (Cat. No.01CH37294), 2002
An arc fault in switchgear is a failure with enormous effects and a high hazard potential to persons in its vicinity. Therefore the switchgear manufacturers intensively look for possibilities to minimize this hazard potential. The ways used in industrial practice can be separated in to two basic directions, the active and the passive protection.
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Fault classification for distance protection

IEEE/PES Transmission and Distribution Conference and Exhibition, 2003
This paper presents an overview of power system fault classification methods and challenges. It also contains some ideas about structured testing.
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Protection of Muller-Pipelines from transient faults

Fifteenth International Symposium on Quality Electronic Design, 2014
While it is well understood how to efficiently protect the data path in an asynchronous transmission channel against transient faults, much less is known about protecting the handshake signals along with their associated logic - mostly a Muller Pipeline - although these are equally critical for the proper function. In this paper we analyze the possible
Syed Rameez Naqvi, Jakob Lechner, Andreas Steininger   +2 more
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Fault currents and electrical protection

2010
This chapter discusses the fault current and electrical protection scheme in distributed generators. Electrical faults, caused by the breakdown of insulation, are inevitable in any electrical power system. Faults may be caused by mechanical damage to the equipment or created by the degradation of insulation over time. Electrical protection is then used
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Overcurrent and earth-fault protection

1997
Overcurrent and earth-fault protection are the oldest and most commonly used types of protection. Until the late 1980s almost all of these relays were electromagnetic in design, whereas new installations are predominantly solid state; even so, many of the simple, robust and reliable electromagnetic relays already installed are likely to remain on the ...
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