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Current limiting reactor. The main motive of using current limiting reactors is to reduce short-circuit currents so that circuit breakers with lower short circuit breaking capacity can be used. They can also be used to protect other system components from high current levels and to limit the inrush current when starting a large motor. [5]
Current limiting is the practice of imposing a limit on the current that may be delivered to a load to protect the circuit generating or transmitting the current from harmful effects due to a short-circuit or overload. The term "current limiting" is also used to define a type of overcurrent protective device.
Series reactors are used as current limiting reactors to increase the impedance of a system. They are also used for neutral earthing. Such reactors are also used to limit the starting currents of synchronous electric motors and to compensate reactive power in order to improve the transmission capacity of power lines. [3]
It consists of a power capacitor connected in series with a bidirectional thyristor valve and, usually, a current limiting reactor . The thyristor switched capacitor is an important component of a Static VAR Compensator (SVC), [ 1 ] [ 2 ] where it is often used in conjunction with a thyristor controlled reactor (TCR).
Chemical reactor, a device for containing and controlling a chemical reaction; Fusion reactor, a device for containing and controlling a fusion power reaction; An inductor (possessing reactance) in an electrical power grid A current limiting reactor is used to limit starting current of motors and to protect variable frequency drives
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The current in the TCR is varied from maximum (determined by the connection voltage and the inductance of the reactor) to almost zero by varying the "Firing Delay Angle", α. α is defined as the delay angle from the point at which the voltage becomes positive to the point at which the thyristor valve is turned on and current starts to flow.