Results 261 to 270 of about 137,232 (346)

Ground fault location identification for multiple drive high resistance grounding systems

2013 IEEE Energy Conversion Congress and Exposition, 2013
One of the more difficult problems to solve in industrial plants is to locate and eliminate a ground fault in High Resistance Grounding (HRG) system. This is because ground fault conditions in these systems do not draw enough current to reliably trip the ground fault current detector in the drive. This paper studied the ground fault identification (GFI)
Lixiang Wei, Jiangang Hu, Jeffrey McGuire, Zhijun Liu   +3 more
openaire   +2 more sources

Analysis of very-high-resistance grounding in high-voltage longwall power systems

IEEE Transactions on Industry Applications, 2001
The application of very sensitive ground-fault protection in underground coal mines was demonstrated in the early 1980s for low- and medium-voltage utilization circuits (less than 1 kV), but its commercial application did not occur until the advent of high-voltage utilization circuits on longwalls in the late 1980s.
Tomáš Novák
openaire   +2 more sources

Conversion of Ungrounded Systems to High-Resistance Grounding Systems

2006 IEEE Industrial and Commercial Power Systems Technical Conference - Conference Record, 2006
An innovative method is proposed where charging current can be measured and grounding resistors sized without staging a fault. Overvoltages have caused damage to equipment and voltage transformer fuse blowing an ungrounded 4.8 kV delta distribution system.
P.E. Sutherland, A. Mansoor
openaire   +2 more sources

The effects of very-high-resistance grounding on the selectivity of ground-fault relaying in high-voltage longwall power systems

IEEE Transactions on Industry Applications, 2001
With the advent of high-voltage (greater than 1 kV) utilization circuits on longwall mining equipment in the late 1980s, the Mine Safety and Health Administration (MSHA) initially required maximum ground-fault current limits of 3.75 A for 4160 V systems and 6.5 A for 2400 V systems.
Tomáš Novák
  +4 more sources

Ground Fault Monitoring for Motor-Drive Systems with High Resistance Grounding

2023 IEEE International Electric Machines & Drives Conference (IEMDC), 2023
Jiangang Hu, Yujia Cui, Andrew Roberts, Jeff McGuire   +3 more
openaire   +2 more sources

High Resistance Grounding Systems in MV Shipboard Power Systems

2022 IEEE 2nd International Conference on Sustainable Energy and Future Electric Transportation (SeFeT), 2022
Shashidhar Kasthala, Radhika Goru
openaire   +2 more sources

Some of the next articles are maybe not open access.

Related searches:

High Resistance Grounding—Avoiding Unnecessary Pitfalls

IEEE Transactions on Industry Applications, 2007
The high resistance grounding (HRG) of 480-4160-V industrial power systems increases service continuity, enhances personnel safety, and reduces equipment damage when a ground fault occurs. HRG allows maintenance personnel to quickly and safely locate a ground fault while avoiding unscheduled downtime.
David Murray, John Dickin, Robert Hanna, Tom Morin   +3 more
openaire   +1 more source

Directional ground fault indicator for high-resistance grounded systems

IEEE Technical Conference Industrial and Commerical Power Systems, 2003
Locating ground faults is a difficult and challenging problem for low-voltage power systems that are ungrounded or have high-impedance grounding. Recent work in pilot signals has renewed efforts in developing fault location methodologies. This paper presents a method for directional ground-fault indication that utilizes the fundamental frequency ...
T. Baldwin, F. Renovich, L.F. Saunders
openaire   +1 more source

High Resistance Neutral Grounding [History]

IEEE Industry Applications Magazine, 2012
The last two decades of the 19th century witnessed a rising interest in electrical power projects and a heated debate about using direct current (dc) or alternating current (ac) systems as the backbone of generating and transmitting power. The debate escalated and it was dubbed the "War of Currents." By 19th century measurements, the Niagara Falls ...
Barry Brusso, Rasheek Rifaat
openaire   +1 more source

Advanced concepts in high resistance grounding

2012 Petroleum and Chemical Industry Conference (PCIC), 2012
Resistance grounding is relatively simple and easy to apply in radial distribution systems at Low Voltage. When high resistance grounding is applied, using one Neutral Grounding Resistor at the supply transformer, an alarm system to detect and indicate the ground fault is then required by the installation codes.
Ajit Bapat, Robert Hanna, Sergio Panetta
openaire   +1 more source