Need series rating info for a specific circuit breaker

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Tainted

Tainted

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New York
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Engineer (PE)
Is anybody here familiar with Eaton circuit breakers?

Before I choose a fuse I need to know if it's series rated with the overcurrent device downstream. I'll use fuses to feed a 3-phase 208V EATON panelboard called "Pow-R-Xpress". The panelboard has a 3-pole main circuit breaker EATON catalog BKD2F200. The panelboard will use BAB breakers for branch circuits.

I want to find out what fuses are series rated with BKD2F200 main breaker and I can't find anything. Does anybody know where I can find this info?
 
Not an answer to your question, but relevant:. How will you be handling the branch breakers? They will need to also series rate with the fuses, be part of a triple rating, or make the MB fully rated and series rate the branches to that.
 
electrofelon said:
Not an answer to your question, but relevant:. How will you be handling the branch breakers? They will need to also series rate with the fuses, be part of a triple rating, or make the MB fully rated and series rate the branches to that.
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BAB branch breakers are listed there in series with some bussman fuses

https://www.eaton.com/content/dam/e...e-cutler-hammer-series-rated-combinations.pdf

Main breaker is not in that list unfortunately

Does this mean I can only use an MLO panel?
 
I can't recall ever having a requirement for anything over 65k. I know it must happen but must be fairly uncommon. Have you made sure you really need such a high rating? A lot of times a little extra wire can reduce the available scc by a lot more than you might think.
 
petersonra said:
I can't recall ever having a requirement for anything over 65k. I know it must happen but must be fairly uncommon. Have you made sure you really need such a high rating? A lot of times a little extra wire can reduce the available scc by a lot more than you might think.
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Highest I have seen was 110k quoted by the POCO at their secondary terminals. Transformer vault was right outside so very short wire on so it was still in the upper 70s at my service equipment. I was skeptical of the Poco number so I pumped out the vault and looked myself. Turned out to be mid-70s at the transformer secondary, mid 50's by the time I got to my service equipment (assuming infinite primary). It might not have been a huge deal to stay under 65 as I was using Siemens QR frame (250A max) for my distribution and they have a model that goes up to 100K, and even at 100K there is a series rating right down to 10K branches.... But in the end I only needed the 65k version so I'm sure I saved something not listening to the Poco.
 
electrofelon said:
I am not very familiar with Eaton panelboards, but I find it hard to believe in this day and age you can't get a main breaker for that panel board rated higher than 65k. Have you talked with the supply house/eaton rep who is building these for you? What is the available fault current at the panel board?
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I don't know the fault at the panelboard because no one reached out to utility for the fault at the service. I have to choose a fuse based on the electrician's panel that he specified. So if we don't know the fault, then I need a fuse that is series rated with the breaker that he chose. (At worst case scenario)
 
Since 200 amp bussman LPJ 200kAIC class J fuses are series rated with BAB breakers, should I just tell them to take off the main breaker and let the class J fuse feed all the BAB branch breakers?
 
Tainted said:
Since 200 amp bussman LPJ 200kAIC class J fuses are series rated with BAB breakers, should I just tell them to take off the main breaker and let the class J fuse feed all the BAB branch breakers?
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If the main breaker isn't needed for some code purpose like a tap or transformer secondary or 408.36, I would skip it. I never use a main breaker if it's not needed for some purpose.
 
electrofelon said:
If the main breaker isn't needed for some code purpose like a tap or transformer secondary or 408.36, I would skip it. I never use a main breaker if it's not needed for some purpose.
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Got it,

Also, I looked closely at the panelboard cutsheet and it says
"Note: Series ratings available for main lug only interiors with selected upstream main devices."

Does this mean this panel can only be series rated with MLO type enclosures only?

https://rexel-cdn.com/products/4.pdf?i=6CAD6DB2-EDFE-4EE3-9C4F-426B1CED7103
 
Tainted said:
Got it,

Also, I looked closely at the panelboard cutsheet and it says
"Note: Series ratings available for main lug only interiors with selected upstream main devices."

Does this mean this panel can only be series rated with MLO type enclosures only?
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The UL series rating tests do not require any specific distance between upstream and downstream locations, direct connections are allowed.
 
Funny thing I'm having almost the same issue with a set of prints today and Eaton told me they do not a new chart for that line of breakers.

Sent out an RFI
I'll let you know what we come up with.
 
electrofelon said:
I am not very familiar with Eaton panelboards, but I find it hard to believe in this day and age you can't get a main breaker for that panel board rated higher than 65k. Have you talked with the supply house/eaton rep who is building these for you? What is the available fault current at the panel board?
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I don't know about Eaton but with Square D recently the bigger problem is likely how long will it be until you can get the item you want on something like this. I'm still waiting for some QBL2225 breakers that were ordered back in April. I was lucky to have some used breakers to use temporarily but this is ridiculous they aren't here yet.
 
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