Siemens Series Ratings 3VA52 or 53 feeding a BL

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W6SJK

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Brand new installation. Trying to find series ratings for Siemens:
225A 3VA52-MFAS feeding a 20A BL
400A 3VA53-MJAS feeding a 20A BL

but they are not listed in the Series Rating combination guides that I can find online. Surely these "current" products have been tested! Any suggestiosn other than contact the distributor / vendor during the week? TIA
 
W6SJK said:
Brand new installation. Trying to find series ratings for Siemens:
225A 3VA52-MFAS feeding a 20A BL
400A 3VA53-MJAS feeding a 20A BL

but they are not listed in the Series Rating combination guides that I can find online. Surely these "current" products have been tested! Any suggestiosn other than contact the distributor / vendor during the week? TIA
Click to expand...

Yeah most of the series rating charts don't have the newer 3V breakers.....generally, you can only go up to a 225/250 A frame to rate with a standard 10k breaker. Above that, you will probably need to go with a 22k BLH branch.

Try this, go to the literature tab:

Siemens Consultant Contractor

Siemens Consultant shows details for products like Panelboards, Low Voltage Circuit Breaker, Front Connected Low Voltage Switch Gear, Compas Contractor Version, Switchboards
contractor.compas.siemens-info.com contractor.compas.siemens-info.com
 
Last edited:
electrofelon said:
Yeah most of the series rating charts don't have the newer 3V breakers.....generally, you can only go up to a 225/250 A frame to rate with a standard 10k breaker. Above that, you will probably need to go with a 22k BLH branch.

Try this, go to the literature tab:

Siemens Consultant Contractor

Siemens Consultant shows details for products like Panelboards, Low Voltage Circuit Breaker, Front Connected Low Voltage Switch Gear, Compas Contractor Version, Switchboards
contractor.compas.siemens-info.com contractor.compas.siemens-info.com
Click to expand...
Many thanks! Yes the 208V BL's were limited to a 250A feeder. The 480V panels had ratings for 225A feeders but the 400A feeders had limitations of 30A for the branch CBs.
 
W6SJK said:
Many thanks! Yes the 208V BL's were limited to a 250A feeder. The 480V panels had ratings for 225A feeders but the 400A feeders had limitations of 30A for the branch CBs.
Click to expand...
I know it's nice to stick with 10k branches for convenience down the road adding or changing things, but with a factory PB order, IIRC it was only about $3 more per pole to get 22k branches over 10's. 22's series rate up to like a 1200 device at 100k!
 
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