Transformer, being a stationary electrical equipment, does not have rotational or windage losses. The losses which occur in a transformer are, Copper losses Iron or core losses.
Losses in Transformer – Copper, Iron, Hysteresis & Eddy Current Losses Read More »
A Split Phase Induction Motor is a type of single-phase motor that has two windings: a main winding and a starting winding. The primary feature of this motor is its ability to create a phase difference between the currents in the main and starting windings, which helps generate the necessary starting torque. Fig. 1. Split
Megger is a portable instrument for measuring high resistances in which the voltage range can be controlled by using a voltage selector switch. It is not only used for measurement of high resistances (insulation resistance), but also can be used for testing of insulation resistance. One more advantage is that deflection of the instrument is
What is Megger? Working, Construction, Diagram & Applications Read More »
It is also the gas discharge lamp in which sodium is used, so this is called as the sodium vapour lamp. Fig. 1. Sodium Vapour Lamp.
What is Sodium Vapour Lamp? Working, Diagram, Construction & Uses Read More »
Thevenin’s Theorem is very useful particularly when the current in one branch of a network is to be determined. Statement of Thevenin’s Theorem Thevenin’s Theorem states that for the purpose of determining the current through a resistor RL (called load resistance) connected across any two terminals A and B of a linear bilateral network with
What is Thevenin’s Theorem? Statement, Formula, Steps & Examples Read More »
Braking is the method of stopping the motor whenever it is needed. A three-phase induction motor can be braked by disconnecting the stator windings from the supply and feeding two stator phases with DC. A three phase slip-ring motor can also be braked by opening one supply lead to the motor and connecting a suitable
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The Star Delta Starter used to starting the standard squirrel cage induction motors with both ends of each of the three windings brought out (six terminals) are known as star-delta motors. The Star Delta Starter connects the three stator windings in star across the rated supply voltage at the time of starting. After the motor
What is Star Delta Starter? Working, Diagram, Construction & Advantages Read More »
Different DC motors are used in industry for various applications. Which type of motor will suit a particular load depends on the requirements of the load and characteristics exhibited by the motor. Applications of different motors are as under: DC Shunt Motor Applications Fig. 1: DC Shunt Motor Torque speed characteristics.
DC Motor Applications | Selection of DC Motors for a Particular Applications Read More »
The potential transformer is another type of instrumentation transformer. It is used to measure high ac voltages. The construction of a Potential Transformer (P.T.) is same as that of the normal transformer. Fig. 1 : Connection of Potential Transformer (PT) to measure voltage.
What is a Potential Transformer (PT)? Working Principle, Diagram, & Disadvantage Read More »
A two point starter (or 2 Point Starter) is used for starting of a DC series motor. Fig. 1: 2 Point Starter
What is a 2 Point Starter? Working Principle, Construction, Diagram & Disadvantage Read More »