Results 261 to 270 of about 445,363 (308)

Advanced generator ground fault protections

2015 68th Annual Conference for Protective Relay Engineers, 2015
Ground faults in generator stator and field/rotor circuits are serious events that can lead to damage, costly repair, extended outage and loss of revenue. This paper explores advances in field/rotor circuit ground fault and stator ground fault protection.
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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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Performance testing low voltage ground fault protection

2001 IEEE Industrial and Commercial Power Systems Technical Conference. Conference Record (Cat. No.01CH37226), 2002
The National Electrical Code (NEC) requires ground-fault protection of equipment by devices intended to detect and interrupt low-current arcing phase-to-ground faults on many solidly grounded low-voltage systems having current ratings of 1000 A or greater.
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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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Fault Protection of Radial Lines

2009
This chapter contains sections titled: Radial Distribution Systems Radial Distribution Coordination Radial Line Fault Current Calculations Radial System Protective Strategy Coordination of Protective Devices Relay Coordination on Radial Lines References ...
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Ground-fault protection of unit-connected generators

Electrical Engineering, 1958
THE INCREASING SIZE of turbine-generators on large power supply systems means that a sudden loss of a unit tends to endanger the continuity of power supply over large areas. Because of this, some operating companies prefer to sound an alarm upon the detection of generator ground faults which in themselves do not cause immediate disability of the ...
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Improved fault protection for rural distribution systems

Electrical Engineering, 1945
The use of automatic oil circuit reclosers on rural distribution lines has re-sulted in improved continuity of service as well as reduced maintenance cost. How-ever, automatic circuit reclosers now in use are limited in application because of their inability to co-ordinate properly with fuses on the load side of the reclosers.
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A New Method of Ground Fault Protection

Transactions of the American Institute of Electrical Engineers, 1934
A new high-resistance ``thyrite'' and a new 3-element cold-cathode tube having unusual characteristics constitute the basic elements in a new high voltage relay combination for relaying or detecting ground faults on ungrounded systems. This scheme of protection, as described herein, is characterized by its reliability, simplicity, sensitivity, and low ...
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Fault-tolerant control of an error-corrected qubit

Nature, 2021
Laird Egan, Crystal Noel, Andrew Risinger   +2 more
exaly  

Faulting Processes Unveiled by Magnetic Properties of Fault Rocks

Reviews of Geophysics, 2020
Tao Yang, Yu-Min Chou, Eric C Ferré
exaly