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  2. Vacuum interrupter - Wikipedia

    en.wikipedia.org/wiki/Vacuum_interrupter

    30 year old Siemens vacuum interrupter. The contacts carry the circuit current when closed, forming the terminals of the arc when open. They are made of a variety of materials, depending on the vacuum interrupter's use and design for long contact life, rapid recovery of voltage withstand rating, and control of overvoltage due to current chopping.

  3. Contactor - Wikipedia

    en.wikipedia.org/wiki/Contactor

    A basic contactor will have a coil input (which may be driven by either an AC or DC supply depending on the contactor design). Universal coils (driven by AC as well as DC) are also available in the market today. [3] The coil may be energized at the same voltage as a motor the contactor is controlling, or may be separately controlled with a ...

  4. Contact breaker - Wikipedia

    en.wikipedia.org/wiki/Contact_breaker

    The contact breaker is operated by an engine-driven cam.On an engine with a distributor, the contact breaker can be found beneath the distributor cap.The position of the contact breaker is set so that it opens (and hence generates a spark) at exactly the optimum moment to ignite the fuel/air mixture.

  5. Magnetic starter - Wikipedia

    en.wikipedia.org/wiki/Magnetic_starter

    A magnetic starter has a contactor and an overload relay, which will open the control voltage to the starter coil if it detects an overload on a motor. [1] [2] The overload relay opens a set of contacts that are wired in series with the supply to the contactor feeding the motor. The characteristics of the heaters can be matched to the motor so ...

  6. Utilization categories - Wikipedia

    en.wikipedia.org/wiki/Utilization_categories

    Control of small electromagnetic loads with holding current ≤ 0.2 A; e.g. contactor relays 60947-5-2 A: Protection of circuits, with no rated short-time withstand current: 60947-3 B: Protection of circuits, with a rated short-time withstand current: 60947-3 DC-1: Non Inductive or slightly inductive loads, resistance furnaces, heaters: 60947-4 ...

  7. Eletrobras Furnas - Wikipedia

    en.wikipedia.org/wiki/Eletrobras_Furnas

    Eletrobras Furnas (Furnas – Centrais Elétricas SA) is a regional power utility and a major subsidiary of Eletrobras. The company generates or transmits electricity to 51% of households in Brazil and more than 40% of the nation's electricity passes through their grid. The company has a generating capacity of 10,050 MW which corresponds to 10% ...

  8. Circuit breaker - Wikipedia

    en.wikipedia.org/wiki/Circuit_breaker

    Circuit breakers with higher ratings can have adjustable trip settings, allowing fewer standardized products to be used, adjusted to the applicable precise ratings when installed. For example, a circuit breaker with a 400 ampere frame size might have its over-current detection threshold set only 300 amperes where that rating is appropriate.

  9. Korndörfer autotransformer starter - Wikipedia

    en.wikipedia.org/wiki/Korndörfer_Autotransformer...

    The phase coils are traditional wound in a single coil assembly with the 0 to 50% winding section buried below the 50% to 100% windings in a single thermal mass as shown in figures 2 and 3 Figure 4. 3 Coil Assembly. Figure 4 shows an improved 1000 kW 11,000 Volt motor starter autotransformer with Axial cooling fans, Cast resin encapsulated coils,

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