Cascading fuses with circuit breakers

[BigBill53]

Hello,
I have heard that you can cascade fuses with circuit breakers to increase the kA breaking capacity, much like you can do with cascading circuit breakers.

From what I can tell this is called "series rated". However, I really can't find much information from manufacturers about it. For cascading circuit breakers it is easy, just look up the cascade tables. I have looked at 4 manufacturers and cannot find any equivalent for circuit breakers and fuses.

Can someone please give me some direction? Am I on the wrong track here?

 

[resqcapt19]

Under the NEC, you need to use a tested combination of fuses and breakers for a series rating in a new installation. The fuse manufacturers have tables that show the tested series rating when using breakers and fuses. Take a look here for some:

http://www.bussmann.com/2/ManufacturerSeriesRatingCharts.html

 

[timm333]

The link above has series rating chart for American circuit breakers.

Does anybody know where I can find a similar "European" chart for series rating (fuse-breaker cascading)?

 

[rbulsara]

Every decent breaker manufacture has a published chart for their breakers series (cascade) ratings.

Rafiq Bulsara

http://www.srengineersct.com

 

[timm333]

The charts are available for American breakers, but my question was about the European breakers. I am not able to find European Charts. Does anybody know where I can find?

 

[rbulsara]

Why is it so difficult? Did you ask Eurpoean manufacturers? If they do not have it, no one will have it.

Rafiq Bulsara

http://www.srengineersct.com