Electrical circuit overloads happen when more amperage is put across an electrical wire or circuit than it can handle. Depending on how much the rating is exceeded, the tolerable time decreases. This article well explains the difference between over-current and overload. The possibility of over current in electric current is bigger than short circuit, especially when electric motor switches on and has positive and negative inversion frequently. See more. Meaning of overcurrent. Definition of overcurrent in the Definitions.net dictionary. Overcurrent definition, a current of a magnitude that is greater than a limiting value, as the value at which a fuse melts. Overcurrent definition is - an electrical current whose intensity is higher than a specified amount. The basic rule for overcurrent protection of conductors—other than using flexible cords, flexible cables, and fixture wires—is to protect the conductor in accordance with the ampacities specified in Section 310.15. The causes may include: The motor suffers an impact load or the transmission mechanism is stuck, which leads to sudden increase of the motor current. What is a power supply’s OCP? Overcurrent in VFD working refers to the overcurrent of the driving system occurs in the working. Any situation in which the current flow through a device or conductor exceeds the desired value is known as over current. The general requirement for overcurrent protection of conductors is provided in Section 240.4, Protection of Conductors. This can cause overheating, the effects of which can range from minor degradation of cycle life to a catastrophic thermal runaway. Information and translations of overcurrent in the most comprehensive dictionary definitions resource on the web. What does overcurrent mean? 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. Without some form of overcurrent protection device installed in series with the circuit conductors, the only limit of the fault overcurrent is the conductor resistance and the amount of power available from the transformer. An overcurrent relay is an electrical protection device designed to cut off the power supply to a circuit, appliance, or machine in the event of an overload or failure. For instance, a #14 wire can safely carry 15 amps and should be protected by a 15-amp breaker. Difference between over-current and overload Over-current. Overcurrent occurs if the device draws currents larger than the manufacturer-recommended rating for various periods of time. Over-current and overload are abnormal conditions occurring in a circuit. 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