The same name breakers as the manufacture of the load center.
Don't Understand your question, all of your circuit breakers start at the load center and then branch out to your recepticles(plugs) ETC.
They protect the downstream components from spikes in the eletrical system.CommentFuses and circuit breakers do not protect against 'spikes', which are near-instantaneous voltage increases. Fuses and circuit breakers are overcurrent protection devices, which protect appliances against excessive current due to overloads or short circuits. CommentFuses and circuit breakers are used to protect the wire feeder that supplies the load. A load could be connected to a circuit that would cause an increase of amperage above what the wire is rated for. If this condition happens the fuse or circuit breaker will open the load from the supply service.
3 pole circuit breakers are used for 3 phase lines
Certainly not in the case of high-voltage circuit breakers. Probably not in low-voltage circuit breakers, as copper is a better conductor and has a higher melting point.
Circuit breakers.
A circuit breaker is a safety device that is put in an electrical circuit. When something fails, or shorts out, the circuit breaker "senses" the excessive current and automatically opens (or breaks) the circuit. They are used in homes, as well as some electrical devices. They are different than a fuse in that a circuit breaker can be reset. A fuse on the other hand, has to be replaced once it opens up. I hope this helps you. for more info, here is a web page about circuit breakers: <a href="http://www.wisegeek.com/what-is-a-circuit-breaker.htm">Ciruit breakers</a>
SF6 circuit breaker
Circuit breakers prevent excessive current from flowing in the circuit by "tripping" when the current exceeds the circuit breaker rating. This causes the current to be cut off, and is used to protect the wiring as well as the appliances.
fuses
An oil circuit breaker is a breaker that is immersed in a tank of insulating oil. The tank has two electrical bushings through the tank to allow the supply and load to be connected to the breaker. These breakers can be opened under a heavy amperage load. The insulating oil is used to extinguish the arc that is produced when opening a switch under load.
Copper, Brass and Aluminum.
Fuses & circuit breakers.