Circuit Protection

[Jacky]

Hi All,

 

I'm trying to design a circuit for a conveyor system. During the circuit design i was confused for selecting the protection devices for my single phase 220vac equipment (Example PLC, Power supply). What's the different between circuit protector (Example: Fuji)and molded case circuit breaker(Example: Fuji)? And, what's the different for 1 pole circuit protector and 2 poles circuit protector within a electrical circuit?

[AB2005]

Hi All,

 

I'm trying to design a circuit for a conveyor system. During the circuit design i was confused for selecting the protection devices for my single phase 220vac equipment (Example PLC, Power supply). What's the different between circuit protector (Example: Fuji)and molded case circuit breaker(Example: Fuji)? And, what's the different for 1 pole circuit protector and 2 poles circuit protector within a electrical circuit?

Hello Jacky,

 

There are two devices use for control circuit protection, MCBs (Miniature Circuit Breaker) and Fuses. Both are use in control circuit for providing protection against Short Circuit. Difference in between MCB and Fuse is that fuse blows up in a very short time as compare with MCB when a short circuit occurred in a circuit. But advantage in using MCB is that it is reset-able as once fuse blow up, we have to replace it with a new one. There are different types of MCBs available in market i.e. 1pole, 2poles & 3poles. Now this is our choice which MCB is suitable for our circuit. For example, if input of power supply is two phase, now you would have to use a 2Poles MCB or two fuses so that whenever you work on circuit, it would completely isolate.