Circuit Breaker Tester Classification: Circuit Breaker Tester can be classified into two main groups, viz. (i) type tests and (ii) routine tests. Type Tests: These are performed solely for the purpose of proving the correctness…
Difference between Voltage Amplifier and Power Amplifier: The Difference between Voltage Amplifier and Power Amplifier are discussed below The primary function of the voltage amplifier is to raise the voltage level of the signal. It…
Definition of Inductance of Transmission Line: The formula for definition of inductance of transmission line is as follows: Voltage induced in a circuit is given by where ψ represents the flux linkages of the circuit…
Introduction to Overhead Line: Electric power can be transmitted or distributed either by means of underground cables or by overhead line. The underground cables are rarely used for power transmission due to two main reasons.…
Unbalanced Three Phase Circuit Analysis: Types of Unbalanced Loads - An unbalance exists in a circuit when the impedances in one or more phases differ from the impedances of the other phases. In such a…
Automatic Block Signalling System in Railways: The purpose of automatic block signalling system in railways is to keep trains apart but permit spacing as close as safety permits. For optimum utilization of track capacity with…
Digital Voltmeters Features and Characteristics: Digital Voltmeters Features and Characteristics which includes measuring instruments that convert analog voltage signals into a digital or numeric readout. This digital readout can be displayed on the front panel and…
Low Voltage Arms for Voltage Divider: Low Voltage Arms for Voltage Divider - The mode of connection and the layout arrangement of the secondary arm of the divider is very critical for the distortion less…
Non Inverting Amplifier Theory: Direct-Coupled Noninverting Amplifier - The Non Inverting Amplifier Theory circuit in Fig. 14-14 behaves similarly to a voltage follower circuit with one major difference. Instead of all of the output voltage…
Relay Design and Construction: The Relay Design and Construction is normally divided into the following stages: Selection of the operating characteristics. Selection of proper construction. Design of the contact movement from the point of view…