Results 221 to 230 of about 19,321 (267)

Coordinating overcurrent protection devices

IEEE Computer Applications in Power, 1996
Distribution, substation, and plant engineers can benefit from using an overcurrent protection program in commercial, industrial, and utility applications to aid in clearing temporary faults and isolating permanent faults. In the time it normally takes to check one coordination scheme manually, dozens of alternatives can be evaluated using a graphics ...
M. St. John, A. Borgnino
openaire   +1 more source

New overcurrent tripping device

Electrical Engineering, 1947
The limitations of present overcurrent tripping devices for low-voltage systems have hastened the development of a single unit which can be adjusted to any desired characteristics and meets all the requirements for delayed tripping devices.
H. L. Rawlins, Jerome Sandin
openaire   +1 more source

Overcurrent study on a rural system

Electrical Engineering, 1949
GOOD service continuity with the least possible outlay is a major problem on every rural distribution system. Sectionalizing the primary line is accepted practice today to improve continuity. The problem is to formulate numerically the benefits obtainable with different types of equipment and to find better protective methods.
G. F. Lincks, D. R. Edge, W. C. Mckinley, J. H. Leh   +3 more
openaire   +1 more source

Modeling overcurrent relay characteristics

IEEE Computer Applications in Power, 1992
An approach to computer modeling of the time-current characteristics of protective devices that relies on interactive manipulation and fitting of the curves, which are modeled mathematically as splines is presented. The approach is much easier to use than the commonly used curve-fitting methods, which are reviewed, and it does not require a digitizer ...
S. Chan, R. Maurer
openaire   +1 more source

Overcurrent protection

2021
  +4 more sources

Enhanced time overcurrent coordination

Electric Power Systems Research, 2006
In this paper, we recommend a new coordination system for time overcurrent relays. The purpose of the coordination process is to find a time element function that allows it to operate using a constant back-up time delay, for any fault current. In this article, we describe the implementation and coordination results of time overcurrent relays, fuses and
Arturo Conde Enríquez, Ernesto Vázquez Martínez   +1 more
openaire   +1 more source

Instantaneous Overcurrent Relays for Distance Relaying

Transactions of the American Institute of Electrical Engineers, 1935
Instantaneous isolation of faults on transmission and distribution lines is ever a problem of the relay engineer. The use of instantaneous overcurrent relays as applied to the system of the Oklahoma Gas and Electric Company is discussed in this paper. Relays of this type were applied in conjunction with already installed overcurrent time delay relays ...
openaire   +1 more source

Overcurrent Relay

2023
Samir I. Abood, John Fuller
openaire   +1 more source

Directional overcurrent relays

2011
Directional overcurrent protection is used when it is necessary to protect the system against fault currents that could circulate in both directions through a system element, and when bidirectional overcurrent protection could produce unnecessary disconnection of circuits.
openaire   +1 more source

Generator Backup Overcurrent Protection

IEEE Transactions on Industry Applications, 1982
A concern that the characteristics and correct application of the generator backup relay are misunderstood is addressed in this report to the Power Systems Protection Committee. It is inherently a secure device, and rarely has the opportunity to operate in its intended capacity. So the question was asked, ``Do generator backup overcurrent relays really
openaire   +1 more source