Power-frequency transients refer to the sudden and temporary disturbances in the frequency of the electric power supply. These fluctuations can cause damage to the equipment connected to the grid, can lead to power outages or can result in increased energy consumption. Synonyms for power-frequency transients include voltage transient, power surge, electrical disturbance, power flicker, voltage spike, and electrical interruption. Voltage surges can cause appliances and electronics to burn out, circuit boards to malfunction and light bulbs to blow. Preventative measures include surge protectors, voltage regulators, and uninterrupted power supplies. It is important to safeguard electronic devices to prevent damage from power surges and other electrical disturbances.