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....
Screened cables These cables are used up to 33kv, but some particular cases it may be extended to operating voltages up to 66kv. It is further classified into two, H type and SL type...
Classification of Cables according to their Construction: Electrical cable classification can be done on the basis of their construction as under: Belted cables — up to 22 kV Screened cables — from 22 kV...
Under Ground Cables An Under Ground Cables essentially consists of one or more conductors covered with suitable insulation and surrounded by a protecting cover. Under Ground Cables are used, where it is impractical to...
An Under Ground Cables essentially consists of one or more conductors covered with suitable insulation and surrounded by a protecting cover. Under Ground Cables are used, where it is impractical to use overhead line...
Types of insulators used in AC distribution system. Overhead line conductors should be supported on the poles or towers with the help of insulators. The insulator provide necessary insulation between the line conductors and...
Voltage regulation When transmission line carries the current, there is a voltage drop in the line due to resistance and inductance of the line. This results, the receiving end voltage VR is less than...
Types of D.C. Generators The magnetic flux in a DC machine is produced by the field coils carry current. The circulating current in the field wingdings produces a magnetic flux, and the phenomenon is...
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