Results 211 to 220 of about 9,150 (262)

Protection of VSD transformers

2017 Petroleum and Chemical Industry Conference Europe (PCIC Europe), 2017
Variable Speed Drives (VSD) protect themselves as well as the driven motors. In contrast, the isolation input transformer typically requires its dedicated protection. Unlike distribution and power transformers, the protection of VSD duty transformers need to consider several additional aspects, such as non-sinusoidal current with harmonic content ...
Martin Bruha, Marcel Visser, Joseph von Sebo, Esa Virtanen, Pasi Tallinen   +4 more
openaire   +1 more source

Relay protection of transformers

Electrical Engineering, 1947
To develop certain criteria of adequate protection, discover inherent limitations, and to recommend desirable devices and methods for protection of power transformers, the AIEE relay subcommittee conducted a survey of over 56,000,000 kva of power transformers. The final report is the result of almost three years of investigation by the working group.
W. Brownlee, C. Asbury, E. B. Gross, E. Harder, L. Kennedy, W. Lewis, W. Marter, E. Ratz, J. Tesar, F. . Vogel   +9 more
openaire   +1 more source

Transformative Animal Protection

2023
Abstract Because institutional constraints often preclude animal protection organizations (APOs) from taking an uncompromising public stand on animal rights, they are assumed to play a primarily meliorative rather than transformative role in the animal advocacy movement.
Sue Donaldson, Will Kymlicka
openaire   +1 more source

Rectifier relay for transformer protection

Electrical Engineering, 1945
THE BASIC PRINCIPLE of differential protection of electric equipment consists of measuring the sum of the currents at the various terminals of the generator, transformer, or bus. If the vector sum of these currents is substantially zero, there is no fault; if the vector sum is not zero, a fault condition is indicated.
openaire   +1 more source

Lightning Protection of Distribution Transformers

Transactions of the American Institute of Electrical Engineers, 1935
Data on the results of lightning protection for distribution transformers on the system of the Georgia Power Company have been compiled, to determine the improvement resulting from changes which have been made, particularly the interconnection of the ground leads of the primary arrester with the transformer secondary neutral.
openaire   +1 more source

The Protection of a Transformers

2021
Jaafar, Abbas Muhammad, Karrar S. Faraj
openaire   +2 more sources

Transforming Protection

Unarmed civilian protection (UCP) is practised across the world by communities and civilians protecting other civilians from direct violence, without the use or threat of weapons. Using nonviolence, strong relationships and proactive presence, they accompany people and create safer spaces for civilians living amid violence.
openaire   +1 more source

Protective Current Transformers

Nature, 1956
Protective Current Transformers and Circuits By P. Mathews. (Advanced Engineering Textbooks.) Pp. xv + 253 + 4 plates. (London: Chapman and Hall, Ltd., 1955.) 36s. net.
openaire   +1 more source

Transformer protection using the wavelet transform

2020
This paper introduces a novel approach for power transformer protection algorithm. Power system signals such as current and voltage have traditionally been analysed by the Fast Fourier Transform. This paper aims to prove that the Wavelet Transform is a reliable and computationally efficient tool for distinguishing between the inrush currents and fault ...
Özgönenel O., Önbilgin G., Kocaman Ç.   +2 more
openaire   +1 more source

Improving Transformer Protection

2019 72nd Conference for Protective Relay Engineers (CPRE), 2019
Power transformers play a critical role in the power system. These transformers are subject to internal short circuits, external short circuits and abnormal operating conditions. Several protection challenges to power transformers will be explored, and methods to improve the protection provided.
openaire   +1 more source