Fuse resistors selection should consider the double performance

Fuse resistors resistor has a protective function. Selection should consider the double performance, according to the specific air circuit breaker of the circuit and the power to choose their mcb circuit breaker and other parameters. Necessary to ensure that it can quickly blow over load, but also to ensure that under normal conditions, long-term stability. Resistance value is too large or too much power, it can not play a protective role.