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2. Utilization categories - Wikipedia

   en.wikipedia.org/wiki/Utilization_categories

   Usually utilization category is mentioned in most of the switch gear, with the above contactor stating to be used under AC1 - resistive load & AC3 for motor usage. In electrical engineering utilization categories are defined by IEC standards [1] and indicate the type of electrical load and duty cycle of the loads to ease selection of contactors ...

3. Recloser - Wikipedia

   en.wikipedia.org/wiki/Recloser

   Reclosers may cooperate with down-stream protective devices called sectionalizers, usually a disconnector or cutouts equipped with a tripping mechanism triggered by a counter or a timer. [17] A sectionalizer is generally not rated to interrupt fault current however it often has a larger Basic Insulation Level, allowing some sectionalizers to be ...

4. Disconnector - Wikipedia

   en.wikipedia.org/wiki/Disconnector

   Unlike load switches and circuit breakers, disconnectors lack a mechanism for suppression of electric arcs which occur when conductors carrying high currents are mechanically interrupted. Thus, they are off-load devices, with very low breaking capacity , intended to be opened only after the current has been interrupted by some other control device.

5. Switchgear - Wikipedia

   en.wikipedia.org/wiki/Switchgear

   Load-break/Load-make switches can switch normal system load currents; Isolators are off load disconnectors which are to be operated after Circuit Breakers, or else if the load current is very small; By voltage class: Low voltage (less than 1 kV AC) Medium voltage (1 kV AC through to approximately 75 kV AC) High voltage (75 kV to about 230 kV AC)

6. Circuit breaker - Wikipedia

   en.wikipedia.org/wiki/Circuit_breaker

   This increases the availability, since open-air disconnecting switch main contacts need maintenance every 2–6 years, while modern circuit breakers have maintenance intervals of 15 years. Implementing a DCB solution also reduces the space requirements within the substation, and increases the reliability, due to the lack of separate disconnectors.

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   If you missed Beyoncé's epic Christmas concert, you can now watch it as much as you want.. On Friday, Dec. 27, Netflix announced that the megastar's 13-minute halftime show performance during ...

8. Woman Attempting to Smuggle 22 Pounds of Meth Wrapped as ...

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   A Canadian woman allegedly attempted to smuggle 22 pounds of methamphetamine wrapped as Christmas presents through a New Zealand airport on Sunday, Dec. 8.

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