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10 or 20 A 230 V AC, Europe common domestic circuit breaker rating 15 or 20 A 120 V AC, United States, Canada and Mexico domestic circuit breaker rating 16.6 A 120 V AC, toaster, kettle (2 kW) 20 A 230 V AC, Immersion heater (4.6 kW) 24 A 12V DC, PC, High-performance graphics card (288W) 38.3 A 120 V AC, Immersion heater (4.6 kW) 10 2: 80–160 A
Inrush current, input surge current, or switch-on surge is the maximal instantaneous input current drawn by an electrical device when first turned on. Alternating-current electric motors and transformers may draw several times their normal full-load current when first energized, for a few cycles of the input waveform.
An electrical load is an electrical component or portion of a circuit that consumes (active) electric power, [1] [2] such as electrical appliances and lights inside the home. The term may also refer to the power consumed by a circuit. This is opposed to a power supply source, such as a battery or generator, which provides power. [2]
For a simple electrical circuit running on direct current, the electrical current and voltage are constant. In that case, the real power ( P , measured in watts ) is the product of the current ( I , measured in amperes ) and the voltage from one side of the circuit to the other ( V , measured in volts ):
In the power systems analysis field of electrical engineering, a per-unit system is the expression of system quantities as fractions of a defined base unit quantity. . Calculations are simplified because quantities expressed as per-unit do not change when they are referred from one side of a transformer to t
In a simple alternating current (AC) circuit consisting of a source and a linear time-invariant load, both the current and voltage are sinusoidal at the same frequency. [3] If the load is purely resistive, the two quantities reverse their polarity at the same time. Hence, the instantaneous power, given by the product of voltage and current, is ...
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In electrical engineering, the input impedance of an electrical network is the measure of the opposition to current (), both static and dynamic (), into a load network or circuit that is external to the electrical source network.