Circuit and method of over-current protection and method for simulating current capacity of cables

The invention provides a circuit and a method of over-current protection and a method for simulating current capacity of cables. The method of over-current protection includes: determining a current flowing through a first element to be protected, comparing the determined current with a plurality of thresholds, controlling a counter based on the comparing the determined current with a plurality ofthresholds, and stopping the current flowing through the first element by activating a switch in series with the first element when an output of the counter reaches a predetermined counter threshold. 本发明涉及种过电流保护的电路和方法以及仿真电缆的电流容量的方法。该过电流保护方法包括：确定流过要被保护的第元件的电流；将所确定的电流与多个阈值进行比较；基于将所确定的电流与多个阈值的比较来控制计数器；以及当计数器的输出达到预定计数器阈值时，通过激活与第元件串联的开关来阻止电流流过第元件。