Comparison of protective devices
Anglų namų darbas. Protective devices must be provided on all systems to prevent abnormally high currents from overheating and causing mechanical failure on equipment. Overcurrent in a power system usually indicates that current is being diverted from its normal path by a short circuit. In low-voltage, distribution-type circuits, such as we can find in our homes, overcurrent protection can be provided by fuses that melt when current exceeds a predetermined value. Cartridge fuse and circuit breaker are two basic types of protective devices.
Now we will compare some basic protective devices – cartridge fuse and circuit breaker. First and really significant difference is that cartridge fuse is an electric component which does not disintegrate aftrer many years, which means that it needs no maintenance. Also cartridge fuse are small in size and it is Easy and quick to replace which is a big plus! But on the other hand this fuse does not suit high fault current as circuit breaker. Circuit Breakers is a modern alternative to fuses. They switch off when an overload is detected in the circuit. The advantage of circuit breakers over fuses is that: if they trip, they can be reset. Moreover circuit breakers have shorter tripping time than the cartridge fuse. However Surrounding temperature may affect it , and as a result tripping time get slower due to aging.