Main parameters for selecting fuses
Rated current (In): The current of the fuse. For example: 100A.200A.300A, etc
Rated voltage (Un): The voltage that the fuse can safely withstand when disconnected. For example, 250V380V690V700V750V1000V, etc
Breaking ability (Ir): The most important parameter of a fuse is its ability to safely cut off the current of the circuit when a large overload current occurs. Such as 20KA, 50KA, 100KA, 250KA, etc
Melting characteristic (I-T curve): represents the melting time of the fuse under different load currents.
Environmental temperature: The rated current of the fuse is based on an ambient temperature of 25 ° C. High temperatures can reduce its current carrying capacity, leading to an increase in temperature.
Pulse current: It is necessary to consider the impact of instantaneous currents such as starting current and inrush current on the lifespan of fuses.
Arc extinguishing device: In high-power or high-voltage circuits, when the fuse is blown, an arc will be generated, and an arc extinguishing device is needed to prevent arc pulling and completely cut off the current
