Electrical equipment is often designed to operate at a specific power frequency. However, global electrical grids are not uniform—many countries use 50Hz systems, while others operate at 60Hz. In addition, specialized industries such as aviation commonly utilize 400Hz power. When machinery or electronic devices are connected to a power supply with the wrong frequency, their performance can be affected. Motors may rotate at incorrect speeds, control systems can behave unpredictably, and prolonged operation under these conditions may shorten equipment lifespan.