Transients due to load energizing in low voltage systems

Transients are an important but little investigated power quality phenomenon. Switching transients, lightning overvoltages and capacitor energizing are known for their adverse effect on equipment [1]. This paper investigates switching transients in low voltage systems. Large voltage and current transients can occur when common load objects with switched mode power supply such as personal computers are energized. Measurements and corresponding simulations have been performed with computers as load objects.