Pre fab susbtation Pros & cons

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cornbread

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We are looking at replacing one of our 480 Volt subs. Being old school I prefer a block building to house my switchgear. The new school prefers pre fab buildings (elevated for bottom entry). Looking for pro's & con's of each. My main concern on the prefab is the wind load & durability... looking at IRMA, it seems (right now) the concrete structures held up better. Any comments welcomed and appreciated.
 
cornbread said:
We are looking at replacing one of our 480 Volt subs. Being old school I prefer a block building to house my switchgear. The new school prefers pre fab buildings (elevated for bottom entry). Looking for pro's & con's of each. My main concern on the prefab is the wind load & durability... looking at IRMA, it seems (right now) the concrete structures held up better. Any comments welcomed and appreciated.
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Being in the pre fab industry I'm a little slanted towards them.
Our standard wind load is 150 MPH (3 second)
Vasd 101
Vult 150
Warranty is 5 years structural.
 
cornbread said:
We are looking at replacing one of our 480 Volt subs. Being old school I prefer a block building to house my switchgear. The new school prefers pre fab buildings (elevated for bottom entry). Looking for pro's & con's of each. My main concern on the prefab is the wind load & durability... looking at IRMA, it seems (right now) the concrete structures held up better. Any comments welcomed and appreciated.
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Why replace?
 
gadfly56 said:
Old block building falling apart? :angel:
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The thought process is to keep the old stuff going until we have the new substation in place..IE different location that our existing sub. I would prefer a new block structure but I keep reading these pre-fabs hand handle wind loads of 150 mph?
 
cornbread said:
Our reliability group has determined the switchgear and transformer are at the end of life.. (> 40 years).
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It lasted 40 years, you think any of the plastic crap they make today will last that long? Life extension will cost you a fraction of replacement and will last longer (That's what nuclear plants do and I promise they have done more research on this than anyone). What kind of breakers are they? What type of transformers?
 
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