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In an electric power system, overcurrent or excess current is a situation where a larger than intended electric current exists through a conductor, leading to excessive generation of heat, and the risk of fire or damage to equipment.
In electrical engineering, overvoltage is the raising of voltage beyond the design limit of a circuit or circuit element. The conditions may be hazardous. The conditions may be hazardous. Depending on its duration, the overvoltage event can be transient —a voltage spike —or permanent, leading to a power surge.
Current limiting is the practice of imposing a limit on the current that may be delivered to a load to protect the circuit generating or transmitting the current from harmful effects due to a short-circuit or overload. The term "current limiting" is also used to define a type of overcurrent protective device.
Electric current that reverses direction periodically. alternator An electrical machine that converts mechanical power into AC electric power. alternator synchronization The process of synchronizing an alternator to a grid or another alternator. aluminium smelting Reduction of aluminium ore to metal, by use of large amounts of electric power ...
During a power outage, there is a disruption in the supply of electricity, resulting in a loss of power to homes, businesses, and other facilities. Power outages can occur for various reasons, including severe weather conditions (such as storms, hurricanes, or blizzards), equipment failure, grid overload, or planned maintenance.
A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by current in excess of that which the equipment can safely carry (overcurrent). Its basic function is to interrupt current flow to protect equipment and to prevent fire .
Inrush current, input surge current, or switch-on surge is the maximal instantaneous input current drawn by an electrical device when first turned on. Alternating-current electric motors and transformers may draw several times their normal full-load current when first energized, for a few cycles of the input waveform.
Electrical overload Function overloading , the ability to create multiple functions of the same name with different implementations Mechanical overload (engineering) , when a component is stressed to failure in one event