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When a transformer, electric motor, electromagnet, or other inductive load is switched off, the inductor increases the voltage across the switch or breaker and cause extended arcing. When a transformer is switched off on its primary side, inductive kick produces a voltage spike on the secondary that can damage insulation and connected loads. [3]
An inductive load includes inductive (lagging power factor) loads. An inductive load consists of an iron-core reactive element which, when used in conjunction with a resistive load bank, creates a lagging power factor load. Typically, the inductive load will be rated at a numeric value 75% that of the corresponding resistive load such that when ...
Switching of mixed resistive and inductive loads, including moderate overloads: 60947-3 AC-23: Switching of motor loads or other highly inductive loads: 60947-3 AC-31A AC-31B ³) Non-inductive or weakly inductive loads 60947-6-1 AC-33A AC33B³) Motor loads or mixed loads including motors, resistors and up to 30% incandescent lamp load 60947-6-1 ...
Angle notation can easily describe leading and lagging current: . [1] In this equation, the value of theta is the important factor for leading and lagging current. As mentioned in the introduction above, leading or lagging current represents a time shift between the current and voltage sine curves, which is represented by the angle by which the curve is ahead or behind of where it would be ...
The majority of the load in a typical AC power system is inductive; the current lags behind the voltage. Since the voltage and current are out-of-phase, this leads to the emergence of an "imaginary" form of power known as reactive power. Reactive power does no measurable work but is transmitted back and forth between the reactive power source ...
Home automation or domotics [1] is building automation for a home. A home automation system will monitor and/or control home attributes such as lighting, climate, entertainment systems, and appliances. It may also include home security such as access control and alarm systems. The phrase smart home refers to home automation devices that have ...
If an electric circuit has an output port, a pair of terminals that produces an electrical signal, the circuit connected to this terminal (or its input impedance) is the load. For example, if a CD player is connected to an amplifier, the CD player is the source, and the amplifier is the load, [2] and to continue the concept, if loudspeakers are ...
Then the V R, full load is given by +. The effects of this modulation on voltage magnitude and phase angle is illustrated using phasor diagrams that map V R, V S, and the resistive and inductive components of V line drop. Three power factor scenarios are shown, where (a) the line serves an inductive load so the current lags receiving end ...