Power Measurement in Single Phase Circuit by Wattmeter: Wattmeters are generally used to measure power in the circuits. A wattmeter principally consists of two coils, one coil is called the…
Polyphase System: In an ac system it is possible to connect two or more number of individual circuits to a common polyphase source. Though it is possible to have any…
Basic Static Relays in Protective System Articles: Basic Elements of Static Relay : The basic elements of a static relay are namely, Input Element: Mixing circuits are needed to sum…
Performance of Circuit Breaker System Requirements: Analysis of circuit interruption and the foregoing discussion of various circuit breakers apply to circuit breakers in practice if they had ideal switching characteristics.…
Components of Protection System: Some of the more commonly used Components of Protection System are Relays Circuit Breakers Tripping and Other Auxiliary Supplies Current Transformer (CT) Voltage Transformers (VT) Linear…
Derivation of Single Phase Quantity from Three Phase System: It will be seen later that auxiliary channels or pilot wires are used to transmit information from one end of the…
Important Questions of Variable Load on Power Stations: 1. Why is the load on a power station variable ? What are the effects of variable load on the operation of…
Important Questions of Supply Systems: 1. What is electric power supply system ? Draw a single line diagram of a typical a.c power supply scheme. 2. What are the advantages…