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2. Transfer switch - Wikipedia

   en.wikipedia.org/wiki/Transfer_switch

   3-phase transfer switch single-line diagram Intelligent transfer switch. A transfer switch is an electrical switch that switches a load between two sources. Some transfer switches are manual, in that an operator effects the transfer by throwing a switch, while others are automatic and trigger when they sense one of the sources has lost or gained power.

3. ASCO Power Technologies - Wikipedia

   en.wikipedia.org/wiki/ASCO_Power_Technologies

   With over 1400 employees and 500,000 square feet of manufacturing floor space, it is the world's largest manufacturer of power transfer switches. ASCO Power Technologies was founded in 1888 and developed the first commercially available automatic transfer switch in 1920.

4. Power inverter - Wikipedia

   en.wikipedia.org/wiki/Power_inverter

   Waveform produced by a cigarette lighter 12 volt DC to 120 V AC 60 Hz inverter. The modified sine wave is the sum of two square waves, one of which is delayed one-quarter of the period with respect to the other. The result is a repeated voltage step sequence of zero, peak positive, zero, peak negative, and again zero.

5. Switched-mode power supply - Wikipedia

   en.wikipedia.org/wiki/Switched-mode_power_supply

   One of the two switches must be active (e.g., a transistor), while the other can be a diode. Sometimes, the topology can be changed simply by re-labeling the connections. A 12 V input, 5 V output buck converter can be converted to a 7 V input, −5 V output buck–boost by grounding the output and taking the output from the ground pin.

6. Multiway switching - Wikipedia

   en.wikipedia.org/wiki/Multiway_switching

   The switches may be arranged so that they are in the same orientation for off, and contrasting orientations for on. [1] A "4-way" (intermediate) switch is a purpose built double pole, double throw (DPDT) switch, internally wired in manufacture to reverse the connections between the input and output and having only four external terminals. This ...

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