Question

What is conventional pole in electrical transmission?

Answer 1

Single-wire earth return (SWER) or single-wire ground return is a single-wire transmission line which supplies single-phaseelectric power from an electrical grid to remote areas at low cost. Its distinguishing feature is that the earth (or sometimes a body of water) is used as the return path for the current, to avoid the need for a second wire (or neutral wire) to act as a return path.

Single-wire earth return is principally used for rural electrification, but also finds use for larger isolated loads such as water pumps. It is also used for high-voltage direct currentover submarine power cables. Electric single-phase railway traction, such as light rail, uses a very similar system. It uses resistors to earth to reduce hazards from rail voltages, but the primary return currents are through the rails.[1]

Answer 2

The steel poles are of three types (i) rail poles (ii) tubular poles and (iii) rolled steel joints. 3. RCC poles: The reinforced concrete poles have become very popular as line supports in recent years. They have greater mechanical strength, longer life and permit longer spans than steel poles.