China
Africa
Explore chapters and articles related to this topic
Velocity Analysis of Linkages
Published in Eric Constans, Karl B. Dyer, Introduction to Mechanism Design, 2018
Three-phase power has three “hot” leads, each of which is 120° out of phase with the other leads. The voltage versus time signal for a low-voltage three-phase power supply is shown in Figure 5.92. Three-phase power is only available in industrial or commercial settings, so you are very unlikely to encounter a three-phase outlet at your house or apartment. A three-phase plug is easily identified by its four prongs – three are the “hot” leads and one is ground.
Field Winding Protection
Published in Donald Reimert, Protective Relaying for Power Generation Systems, 2017
The majority of excitation systems installed today derive DC power from three-phase rectifiers. At these installations, an inverse-time protection characteristic can be obtained by utilizing AC relays at the input side of the rectifier, as shown in Figure 8.10. The current and voltage at the relay location are not sinusoidal; therefore, the key to successful application is an understanding of the relay response to the input waveforms.
Energy and material flow modelling of additive manufacturing processes
Published in Virtual and Physical Prototyping, 2018
Mazyar Yosofi, Olivier Kerbrat, Pascal Mognol
Electrical energy measurements were performed with a Norma 4000 power measurements three-phase power analyzer. Voltage probe was plugged into power socket in order to measure the voltage value in real time. The current clamp was plugged directly in the stripped supply power cable in power socket exit. This current sensor has an accuracy of 1% of reading ± 2 mA and a resolution of ± 1 mA. Hence, energy loss due to the electric transformer was taken into account for the electrical energy study. Instant power is calculated directly by the power metre by multiplying the rms-voltage, rms-current and power factor value. Then all the data were saved and processed to the power metre software on a computer. Figure 10 shows the electrical assembly diagram.