SSC MTS EXAM

Detailed explanation-1: -In the National Grid, a step-up transformer is used to increase the voltage and reduce the current. The voltage is increased from about 25, 000 Volts (V) to 400, 000 V causing the current to decrease. Less current means less energy is lost through heating the wire.

Detailed explanation-2: -National Grid also has a statutory obligation to have regard to the preservation of amenity in developing the transmission system. Electric power is normally generated, transmitted and distributed as alternating current (AC). Electric power is normally generated, transmitted and distributed as alternating current (AC).

Detailed explanation-3: -The transfer of electrical energy via the grid is very efficient. When currents in a cable are higher, more energy is dissipated to the surroundings through heating. As high currents waste more energy than low currents, electrical power is transported around the grid at a high voltage and a low current.

Detailed explanation-4: -It then passes through a ‘step-up’ transformer at a transmission substation to create high-voltage electricity – up to 400, 000 volts – which travels around National Grid’s electricity transmission network. Increasing the voltage allows for greater efficiency with less energy loss.