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2. Disconnector - Wikipedia

   en.wikipedia.org/wiki/Disconnector

   In electrical engineering, a disconnector, disconnect switch or isolator switch is a type of switching device with visible contacts, used to ensure that an electrical circuit is completely de-energized for service or maintenance.

3. Switch - Wikipedia

   en.wikipedia.org/wiki/Switch

   A high-voltage disconnect switch used in an electrical substation. Such switches are used mostly to isolate circuits, and usually cannot break load current. High-voltage switches are available for the highest transmission voltages, up to 1 million volts. This switch is gang-operated so that all three phases are interrupted at the same time.

4. Switchgear - Wikipedia

   en.wikipedia.org/wiki/Switchgear

   High-voltage switchgear A section of a large switchgear panel. Tram switchgear This circuit breaker uses both SF 6 and air as insulation.. In an electric power system, a switchgear is composed of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment.

5. Substation - Wikipedia

   en.wikipedia.org/wiki/Substation

   A disconnect switch is used to provide isolation, since it cannot interrupt load current. A circuit breaker is used as a protection device to interrupt fault currents automatically, and may be used to switch loads on and off, or to cut off a line when power is flowing in the 'wrong' direction.

6. Electronic switch - Wikipedia

   en.wikipedia.org/wiki/Electronic_switch

   In electronics, an electronic switch is a switch controlled by an active electronic component or device. Without using moving parts, they are called solid state switches , which distinguishes them from mechanical switches.

7. Transfer switch - Wikipedia

   en.wikipedia.org/wiki/Transfer_switch

   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. An Automatic Transfer Switch (ATS) is often installed where a backup generator is located, so that the generator may provide temporary electrical ...