Power factor
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In electrical engineering, the power factor of an AC power system is defined as the ratio of the real power absorbed by the load to the apparent power flowing in the circuit. Real power is the average
1. Reactive power control relay; 2. Network connection points; 3. Slow-blow fuses; 4. Inrush-limiting contactors; 5. Capacitors (single-phase or three-phase units, delta-connection); 6. Transformer (for controls and ventilation fans)
75 MVAr capacitor bank in a 150 kV substation in Belgium
Capacitor bank, consisting of three rectangular capacitors shown in the middle, on a utility pole in San Jose, CA, USA
Power triangle diagram
Switched-mode power supply
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A switched-mode power supply, also called switching-mode power supply, switch-mode power supply, switched power supply, or simply switcher, is an electronic power supply that incorporates a switching
Stand-alone switched-mode power supply
An adjustable switched-mode power supply for laboratory use
This charger for a small device such as a mobile phone is an off-line switching power supply with a European plug, mainly consisting of an opto-coupler, a rectifier and two active devices.
Zero-voltage switched-mode power supplies require only small heatsinks as little energy is lost as heat. This allows them to be small. This ZVS can deliver more than 1 kilowatt. Transformer is not shown.