Electrical wiring generally refers to insulated conductor used to carry current including the associated devices. Domestic electric appliances like lights, fans, washing machines, water pumps etc are connected to the supply through insulated wires which are controlled by switches. The wiring diagram gives the connections of different appliances to the supply within a house or… Read More »
Overhead transmission lines are classified based on the manner in which the capacitance is considered. Common classification is long, short and medium transmission lines. Short Transmission Lines Transmission lines whose length less than 80kms and operating voltage less than 20kV comes under short transmission line. Due to the smaller distance and lower voltage levels capacitance… Read More »
Bundled Conductors For transmission of more power for long distances to load centers Extra High Voltage (EHV) transmission is employed. Implementing Extra High Voltage has advantage of reduction in the copper losses and improves efficiency. However transmission of voltage beyond 300kV will poses some problems such as Corona effect which causes significant power loss and… Read More »
Cable tray / raceway is integral part of any cable management system. Selection of cable tray is very critical because if cable tray size is not sufficient the cables may become damaged due to improper handling and excessive heating etc. On the other hand cable tray supporting system can not be neglected as well since… Read More »
What are the types of line distortions? The distortions occurring in the transmission line are called waveform distortion or line distortion. Waveform distortion is of two types i.e. frequency distortion and phase or delay distortion. How frequency distortion occurs in a power transmission line? When a signal having many frequency components are transmitted along the line,… Read More »
The parameters of a transmission line are Resistance (R), Inductance (L), Capacitance (C) and Conductance (G). Resistance (R) is defined as the loop resistance per unit length of the wire. Its unit is ohm/Km. Inductance (L) is defined as the loop inductance per unit length of the wire. Its unit is Henry/Km. Capacitance (C) is defined as the loop capacitance per… Read More »