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  2. TL431 - Wikipedia

    en.wikipedia.org/wiki/TL431

    The maximum sustained, regulated voltage may not exceed 36 V; the maximum cathode-anode voltage is limited to 37 V. [26] Historically, the TL431 was designed and manufactured with this application in mind, and was advertised as an "extremely attractive replacement for high cost, temperature-compensated zeners".

  3. Prices of production - Wikipedia

    en.wikipedia.org/wiki/Prices_of_production

    This price, a total cost-price (i.e. a replacement cost) equals the average cost price and average profit rate of an output at the point of sale to the final consumer, including all net costs incurred by all the different enterprises participating in its production (factory, storage, transport, packaging etc.), plus tax imposts, insurance ...

  4. Fan coil unit - Wikipedia

    en.wikipedia.org/wiki/Fan_coil_unit

    These motors are sometimes called DC motors, sometimes EC motors and occasionally DC/EC motors. DC stands for direct current and EC stands for electronically commutated.. DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required.

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  6. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state.

  7. Voltage regulator - Wikipedia

    en.wikipedia.org/wiki/Voltage_regulator

    An integrated circuit voltage regulator. A voltage regulator is a system designed to automatically maintain a constant voltage. It may use a simple feed-forward design or may include negative feedback. It may use an electromechanical mechanism, or electronic components. Depending on the design, it may be used to regulate one or more AC or DC ...