Shunts are precise low resistance. These may be used either for D.C. or AC. circuits. A simple form of the shunt resistor is shown in Fig. 1.
What is Double Cage Induction Motor? Working, Construction & Characteristics
A double cage rotor motor gives excellent starting and running characteristics than a deep-bar cage rotor motor. It also provides a high starting torque with a low starting current. Therefore it is also known as low-starting current, high starting torque, low slip-motor. The rotor is well designed in order to have high resistance rotor circuit during starting and low resistance rotor circuit when operating at running conditions. In case of double squirrel cage motor, the starting torque ranges between 200 to 250 percent of full-load torque whereas starting current ranges in between 400 to 600 percent of full-load current.
Double Cage squirrel cage induction motor with a specialty of different types of rotor having not only one cage but two different independent cages of different resistances and cross-sectional areas (Fig. 1).
What is Phasor Diagram? Definition, Theory & Steps
The diagram in which different alternating quantities (sinusoidal) of the same frequency are represented by phasors with their correct phase relationships is known as a phasor diagram.
Block Diagram in Control System – Reduction Rules, Procedure & Properties
Block diagram is a pictorial representation of a control sytem. Each element is represented by a separate block and each block is characterised by transfer function of the element. Let us consider element of a control system having transfer function G(s). If the input and output of element are X(s) and Y(s) respectively, then this element is represented by a block as shown in Fig. 1.
What is Series Inductor Filter? Working, Diagram, Waveforms & Formula
A series inductor filter utilizes the basic property of a inductor by which it opposes any change in the current flowing through it. Whenever the current flowing through an inductor tries to change, a back emf is induced in the inductor and this back emf opposes the current change. A series inductor filter comprises of a large value inductor connected in series with the load resistor as shown in Fig. 1 (a).
What is Shunt Capacitor Filter? Working, Diagram & Formula
The Shunt Capacitor Filter comprises of a large value capacitor, which is connected in parallel with the load resistor.
What is Air Receiver? Working, Diagram, Construction & Function
An Air receiver is a pressure vessel used to store compressed air supplied by the compressor. The reciprocating compressors and other intermittent discharge compressors will require an air receiver to discharge compressed air in the tank Ibr storage and further use. An Air receiver is a cylindrical vessel mounted vertically or horizontally with inlet and outlet connections of compressed air.
What is Pressure Relief Valve? Working Principle, Symbol, Diagram, Types & Function
When pressure control valve is used to limit the pressure in a system to a prescribed maximum value by draining some or all the pump output to the reservoir tank when designed set pressure is reached, it is known as pressure relief valve (Fig. 1).
What is Single Phasing Preventer? Explanation & Circuit Diagram
Single phasing means, one of the three phases is disconnected from the 3-phase supply so that the motor’s two phases are only remaining electrically connected. This happens due to the burning out of one fuse out of three fuses.
What is Photoconductive Cell? Working, Symbol, Characteristics & Applications
In certain semiconductor materials, when light falls on them, their electrical resistance varies. If constant voltage is applied to such conductor, the current varies as the amount of light falling on it varies (because resistance varies). These semiconductors are known as photoconductive cells or photoresistor or light dependent resistors (LDRs).