Substation

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Alwayslearningelec

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NJ
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Estimator
Don't have much info(haven't gotten docs yet). We've been invited to bid a design build SUBSTATION project transit work. We are going to speak with the GC next week before confirming to bid. All we know is there are (2) 3000kw silicone diode rectifiers, transformers, switchgear etc.

Anyone have experience with substations? Wondering what questions or concerns others might have who've done this work? Or questions they'd have knowing it's a design build.

Thank you very much.
 
“What’s under our feet?” Ground grid in rock can get unreal expensive, and foundations can get impossible to install.
understand there are special rules for substations that can get you in trouble later. Fence heights, distances from fencing, rock depth, pvc installation. Trough? Control house?
 
Been there and done that many times.

My first question would be: what is my scope of work? The concern would be: if you haven't done it before then you probably shouldn't do it now. Work with an experienced outfit 1st and learn.

FWIW, we would not accept bids from companies without a proven track record and great references.
 
Hv&Lv said:
“What’s under our feet?” Ground grid in rock can get unreal expensive, and foundations can get impossible to install.
understand there are special rules for substations that can get you in trouble later. Fence heights, distances from fencing, rock depth, pvc installation. Trough? Control house?
Click to expand...
Ground grid in rock? Nah, just on the rock and add parallel counterpoises to incoming and outgoing lines.

Foundations might have to be wide and anchored but not impossible. Your station might wind up elevated of course.
 
mivey said:
Ground grid in rock? Nah, just on the rock and add parallel counterpoises to incoming and outgoing lines.

Foundations might have to be wide and anchored but not impossible. Your station might wind up elevated of course.
Click to expand...
Rocky soil, not solid rock. We encounter that a lot around here
 
Hv&Lv said:
“What’s under our feet?” Ground grid in rock can get unreal expensive, and foundations can get impossible to install.
understand there are special rules for substations that can get you in trouble later. Fence heights, distances from fencing, rock depth, pvc installation. Trough? Control house?
Click to expand...

How does that affect electric? usually other do the excavating and backfill.
 
Typically transit have specific standards of their own they follow, so if they reference something in a document, be sure to get it, because it could be expensive.
The substation itself shouldn't be a big deal as it is typically metal clad SWGR on the primary side (often sheltered aisle if outside) and the low voltage side will support the rectifiers and ancillary loads. They will usually have favorite rectifiers, such as Myers, so bid with their favorite. http://www.myerspowerproducts.com/i...fier-units-2&catid=175,220&lang=en&Itemid=289
 
ron said:
Typically transit have specific standards of their own they follow, so if they reference something in a document, be sure to get it, because it could be expensive.
The substation itself shouldn't be a big deal as it is typically metal clad SWGR on the primary side (often sheltered aisle if outside) and the low voltage side will support the rectifiers and ancillary loads. They will usually have favorite rectifiers, such as Myers, so bid with their favorite. http://www.myerspowerproducts.com/i...fier-units-2&catid=175,220&lang=en&Itemid=289
Click to expand...

TY
 
horsegoer said:
How does that affect electric? usually other do the excavating and backfill.
Click to expand...
Sorry. Different places, different styles.
Generally we design ours and send out bid packets for materials, and another for labor to install foundations, ground grid, steel, bus, etc.
We get one GC to do it all.

about all that is separate is XF. The XF company handles delivery and setting the unit in place.
 
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