What is the difference between the protection of fuses and thermal relays in electrical control? Why
Fuses are used for short circuit protection and thermal relays are used for overload protection.
Fuse burned, must be hands-on to change the new talent is the load work, but the thermal relay is not required, once the power, in a certain period of time it can automatically return to the original state to load work
General fuse hot melt small, the current reaches the action value, action quickly, to provide a sensitive overload protection, once the fuse can not be restored, can only be replaced.
The thermal relay hot melt is relatively large, over current will not immediately action, take some time, suitable for overload protection.
