SSC MTS EXAM

Detailed explanation-1: -Voltage Surge The main cause of these voltage surges in power system are due to lightning impulses and switching impulses of the system. But over voltage in the power system may also be caused by, insulation failure, arcing ground and resonance etc.

Detailed explanation-2: -But when a power surge occurs, it causes a flow of electricity that spikes above 169 volts, resulting in an arc of electrical current. This arc generates heat that is damaging to electronic components and circuit boards.

Detailed explanation-3: -Power surges occur when the flow of electricity is interrupted, then started again, or when something sends electricity flowing back into the system. Surges can range from five or ten volts when you turn on your hair dryer to thousands of volts if lightning strikes a transformer.