Results 211 to 220 of about 301,873 (263)

Double voltage step-up photovoltaic microinverter

2017 IEEE International Conference on Industrial Technology (ICIT), 2017
In conventional photovoltaic microinverters configuration, a single PV module is connected to the grid through two converter stages: a step-up dc-dc stage and a step-down dc-ac stage. In the first stage, a high frequency transformer is generally used to achieve the high step-up voltage ratio conversion to a voltage above the grid peak value, reducing ...
Diana Lopez, Freddy Flores-Bahamonde, Hugues Renaudineau, Samir Kouro   +3 more
openaire   +1 more source

Protecting Workers from Step Voltage Hazards

IEEE Technology and Society Magazine, 2016
Occupational accidents still occur, despite technical developments in the occupational safety field at large. The experience of being harmed at work can be devastating, with profound consequences for employees, their families, friends, and work colleagues. Many consequences cannot be measured directly, such as pain suffered.
Aikaterini D. Baka, Nikolaos K. Uzunoglu
openaire   +1 more source

Step voltage signaling device

2017 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM), 2017
There is a dangerous zone of step voltage in 6-35 kV power networks with an isolated neutral in the emergency mode caused by a ground fault about a point of damage. People and animals occurring in the step voltage area face a severe danger of electrical shock and even death.
openaire   +1 more source

Voltage Step-up Circuits

2015
In the present chapter, the main types of energy conditioning systems will be summarily characterized, as well as energy storing devices and MPPT techniques. Raw electrical energy captured from the ambient sources is generally not suitable for direct usage to power electronic circuits. As such, this energy must be properly conditioned for practical use.
Carlos Manuel Ferreira Carvalho, Nuno Filipe Silva Veríssimo Paulino   +1 more
openaire   +1 more source

Step-Voltage Regulator Model Test System

2015 IEEE Power & Energy Society General Meeting, 2015
In this paper, a 4-node test feeder will be proposed as the Step-Voltage Regulator (SVR) model test system. The formulation for modelling a SVR bank consisting on three single phase Type A regulators in raise position will be stated in an extended way. However, the procedure to extend the formulation to any other connection will be also explained, and ...
Rejwanur Rashid Mojumdar, Pablo Arboleya, Cristina Gonzalez-Moran   +2 more
openaire   +1 more source

Step type feeder voltage regulators

Electrical Engineering, 1935
Discussion and author's closure of a paper by L H. Hill published in the February 1935 issue, pages 154–8, and presented for oral discussion at the distribution and transmission session of the South West District meeting, Oklahoma City, Okla., April 26, 1935. F. L. Snyder (Westinghouse Elec. and Mfg.
openaire   +1 more source

Detecting and Avoiding Step Voltage Hazards

IEEE Transactions on Power Delivery, 2015
Uncontrolled flow of electrical current in the earth may have a range of effects, from barely perceptible to dangerous electrical shocks, or unintended electrical heating resulting in fires. This paper promotes awareness of hazards from ground-potential rise and briefly describes the root causes of voltage in the ground. It is proven that the values of
Aikaterini D. Baka, Nikolaos K. Uzunoglu
openaire   +1 more source

An improved method of voltage stepping

International Journal of Mass Spectrometry and Ion Physics, 1969
Abstract A unit providing sequential stepping over up to eleven mass positions is described. Operation may be in a straight sequence or in one with the reference mass monitored alternately with measurements at the other masses. Performance tests show that the latter mode of operation permits higher precision by virtue of the more frequent monitoring ...
C.E. Rees, D.K. Sullivan
openaire   +1 more source

Voltage-step transient on circular electrodes

Journal of Applied Electrochemistry, 2011
Using the well-known Cottrell asymptote, voltage-step transient (VST) experiments in a two-electrode cell may provide data on the bulk concentration and diffusion coefficient of a working depolarizer, essential for interpretation of liming-diffusion-current (LDC) experiments.
Ondrej Wein, Valentin V. Tovchigrechko
openaire   +1 more source

Single-step voltage regulator Application

Electrical Engineering, 1951
THE DESIGN LIMITS of rural distribution circuits usually are determined by permissible voltage drop rather than the thermal limitations of the conductor. Presently overloaded circuits supplying power at inadequate voltage levels are the result of conservative estimates of load growth.
openaire   +1 more source