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EQ-K e4
EQ-K e4

BEKG1113 PRINCIPLE OF ELECTRICAL AND ELECTRONICS
BEKG1113 PRINCIPLE OF ELECTRICAL AND ELECTRONICS

... - positive- negative, is called Alternating Current, or AC. It literally changes direction at a certain rate, called its frequency, measured in Hertz. • Ordinary household electricity in Malaysia is 240 VAC, 50 Hz. A graph of 240 VAC is a sine wave. AC can be used at it is in light bulbs and motors, ...
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... The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent of the state of the output, so there is no load charge on the reference of input lines. ...
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... Compared with the original “Shaoshan” series locomotives, EMUs use PWM rectifier, thus the power factor is close to 1 and the low harmonic content is obviously decreased, but the high-order harmonic content is slightly increased. In this paper, the preparation of the electric locomotives and EMUs si ...
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... the risk of damaging the regulator from excessive inrush current. Devices with a pulse-width modulated (PWM) power stage are especially vulnerable to high inrush current due to a large amount of capacitance inherent to the design. Voltage regulators powered in shunt as well as those that use SCR-typ ...
< 1 ... 1755 1756 1757 1758 1759 1760 1761 1762 1763 ... 1974 >

Mains electricity



Mains electricity is the general-purpose alternating-current (AC) electric power supply. In the US, electric power is referred to by several names including household power, household electricity, house current, powerline, domestic power, wall power, line power, AC power, city power, street power, and grid power.The two principal properties of the electric power supply, voltage and frequency, differ between regions. A voltage of (nominally) 230 V and a frequency of 50 Hz is used in Europe, most of Asia, most of South America and Australia. In North America, the most common combination is 120 V and a frequency of 60 Hz. Other voltages exist, and some countries may have, for example, 230 V but 60 Hz. This is a concern to travelers, since portable appliances designed for one voltage and frequency combination may not operate or may be destroyed by another.The use of different plugs and sockets in different regions provides some protection from accidental use of appliances with incompatible voltage and frequency requirements.
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