Inrush current refers to the sudden surge of current that occurs when an electrical device is first turned on or energized. It happens because when power is initially applied, the device's electrical components, such as capacitors and transformers, draw a higher-than-normal current to charge or magnetize. Inrush current can be several times higher than the device's steady-state operating current and can cause voltage drops, trip circuit breakers, or damage sensitive components if not properly managed. Devices like soft starters help mitigate inrush current by gradually ramping up voltage during startup, reducing stress on the electrical system.
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