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  2. Central vacuum cleaner - Wikipedia

    en.wikipedia.org/wiki/Central_vacuum_cleaner

    For instance, if a central vacuum has two motors with a power of 500 airwatts each, the whole central vacuum has 2 X 500 airwatts. Airwatts cannot be added together; a unit with two motors of 500 airwatts each does not make a 1000-airwatt unit. For central vacuums with two motors, the airflow may be connected in series or in parallel (not to be ...

  3. Utilization categories - Wikipedia

    en.wikipedia.org/wiki/Utilization_categories

    Motor-loads for household appliances: examples: fans, central vacuum: 60947-4-1 61095 AC-8a: Hermetic refrigerant compressor motor control with manual resetting overloads: 60947-4-1 AC-8b: Hermetic refrigerant compressor motor control with automatic resetting overloads: 60947-4-1 AC-12

  4. Motor control center - Wikipedia

    en.wikipedia.org/wiki/Motor_control_center

    A motor control center (MCC) is an assembly to control some or all electric motors in a central location. It consists of multiple enclosed sections having a common power bus and with each section containing a combination starter, which in turn consists of motor starter , fuses or circuit breaker , and power disconnect . [ 1 ]

  5. Vacuum cleaner - Wikipedia

    en.wikipedia.org/wiki/Vacuum_cleaner

    The power unit of a typical central vacuum cleaner for residential use. Central vacuum cleaners, also known as built-in or ducted, are a type of canister/cylinder model which has the motor and dirt filtration unit located in a central location in a building, and connected by pipes to fixed vacuum inlets installed throughout the building.

  6. Control system - Wikipedia

    en.wikipedia.org/wiki/Control_system

    Its name comes from the information path in the system: process inputs (e.g., voltage applied to an electric motor) have an effect on the process outputs (e.g., speed or torque of the motor), which is measured with sensors and processed by the controller; the result (the control signal) is "fed back" as input to the process, closing the loop. [4]

  7. Vacuum pump - Wikipedia

    en.wikipedia.org/wiki/Vacuum_pump

    The Roots blower is one example of a vacuum pump. A vacuum pump is a type of pump device that draws gas particles from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was invented in 1650 by Otto von Guericke, and was preceded by the suction pump, which dates to antiquity. [1]

  8. Vacuum engine - Wikipedia

    en.wikipedia.org/wiki/Vacuum_engine

    12. is the Pneumatic motor powered by 1. Pedal. In a vacuum motor, the partial vacuum is created by an external pump. These motors were commonly used to power railway turntables in the UK, using vacuum created by a steam locomotive's vacuum brake ejector. The operating principle is similar to a steam engine – in both cases power is extracted ...

  9. Manifold vacuum - Wikipedia

    en.wikipedia.org/wiki/Manifold_vacuum

    Manifold vacuum, or engine vacuum in a petrol engine is the difference in air pressure between the engine's intake manifold and Earth's atmosphere. Manifold vacuum is an effect of a piston's movement on the induction stroke and the airflow through a throttle in the intervening carburetor or throttle body leading to the intake manifold. It is a ...

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