Effects of Low Power Factor
Effects of low power factor 1. Load Current: Low power factor tends to increasing the load current. Power in an AC circuit can be given as: P = VI cosɸ Therefore, cosɸ = P...
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Power Factor
Power Factor Power Factor is Defined as ‘the cosine of the angle between the voltage and current’. In AC circuit, the voltage and current are ideally in phase But practically, there exists a phase...
Methods of Improving Power Factor
List the methods of improving power factor? Static capacitors Synchronous condenser Phase advancers Static capacitors: The power factor can be improved by connecting capacitors in parallel with the equipment operating at lagging power factor....
Methods of Cable laying of Underground cable
Explain the three methods of Cable laying of Underground cable with necessary sketches? There are three main methods used for laying underground cables. 1. Direct laying: A trench of about 1.5 meter deep and...
Insulators used in Underground Cables
Insulators used in Underground Cables The commonly used materials for insulation are impregnated paper, VIR, PVC, varnished cambric or rubber mineral compound. RUBBER: It is the most commonly used insulating material. Natural rubber is produced from...
Explain different causes of insulation failure in overhead line
Explain different causes of failure occurs in insulators An insulator must be properly designed so as to withstand mechanical as well as electrical stresses.Electrical stress on insulator depends on the line voltage, and hence,...
Construction of Under Ground Cable
Construction of Under Ground Cable: The general construction of under ground cable is shown in below. The various parts of the cable are, Cores or Conductors: A cable may have one or more than...
Under Ground Pressure cables
Pressure cables For voltages beyond 66 kV, the electrostatic stresses in the cables exceed the acceptable values and solid cables become unreliable. This occurs mainly because voids are created when voltages exceed 66 kV....
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