10KVA UPS FOR TRAFFIC SYSTEMS

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Sean.Day72

Member
Location
Florida
Just pinging to get to the correct solution here.
I'm putting in a very large dynamic sign over a highway. The department of transportation requires it to be on a 2 hour UPS backup.

The sign is 10KVA and will be fed from a 70A/208V breaker per manufacturer.

I have dealt a lot with APC UPS's for data centers/ comm. rooms and they have a 10KVA unit. The issue is the outputs are nema L6-30R or L5-20R for connecting standard computer loads. I need a UPS with a 60Amp output hardwired to screw terminals. Is there an alternate solution? I think like an inverter on a battery bank? Does anyone have a good manufacturer to research for this?
 
Vertiv (Liebert) and Eaton (Powerware) are the other two "big" players in that size that come to mind. Hopefully you have some way of climate controlling the batteries? VRLA hate being cooked while lithium aren't too fond of the cold, and a two-hour runtime is going to need a decently large gas tank.
 
Sean.Day72 said:
Just pinging to get to the correct solution here.
I'm putting in a very large dynamic sign over a highway. The department of transportation requires it to be on a 2 hour UPS backup.

The sign is 10KVA and will be fed from a 70A/208V breaker per manufacturer.

I have dealt a lot with APC UPS's for data centers/ comm. rooms and they have a 10KVA unit. The issue is the outputs are nema L6-30R or L5-20R for connecting standard computer loads. I need a UPS with a 60Amp output hardwired to screw terminals. Is there an alternate solution? I think like an inverter on a battery bank? Does anyone have a good manufacturer to research for this?
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APC did have a hardwired 10 kva unit, they may be obsolete now. Plug and play batteries, but two ours may be hard to achieve depending on the actual load.
 
AFAIK, all the high-end manufacturers make hard-wired units or have kits to replace the output receptacles with a knockout. Also talk to the manufacturers about having that much battery; they might need to up-size the charger part for a string that large or make some other engineering change.

(Seconded on the climate controlled environment.)
 
It will be in DDB unlimited climate-controlled cabinet. APC has a hardwired output but again sign required a 60amp input with #4AWG wire. The literature doesn't give any max on the hardwire output. I guess I'll just call them up. The sign is 35' wide by 15' tall , it's a big boy.

I was just exploring if using a inverter, battery bank, and din rail mounted Circuit breaker could be an alternate solution. Similar to a solar solution, but instead of the batteries being charge from a solar array they are just charged from the utility..
 
It will be in DDB unlimited climate-controlled cabinet. APC has a hardwired output but again sign required a 60amp input with #4AWG wire. The literature doesn't give any max on the hardwire output. I guess I'll just call them up. The sign is 35' wide by 15' tall , it's a big boy.

I was just exploring if using a inverter, battery bank, and din rail mounted Circuit breaker could be an alternate solution. Similar to a solar solution, but instead of the batteries being charge from a solar array they are just charged from the utility..
 
literature doesn't give any max on the hardwire output. I guess I'll just call them up. The sign is 35' wide by 15' tall , it's a big boy.

I was just exploring if using a inverter, battery bank, and din rail mounted Circuit breaker could be an alternate solution. Similar to a solar solution, but instead of the batteries being charge from a solar array they are just charged from the utility..
 
A 15 minute UPS and a generator would be the usual, but if it's got to be batteries...

I'd call all the above manufacturers and ask for a solution - give 'em the requirements and let them specify the components., they should have sales engineers for this sort of question.
 
Yeah, but then you get into issues of fuel quality+maintenance. Gasoline has an incredibly short shelf-life if you don't put some sort of stabilizer in it, and high-ethanol mixes are difficult to manage even with stabilizers. Diesel, meanwhile, is pretty solid so long as it's crude-based. The moment you start mixing in "bio" components, even to a small degree, algae and other nasties start growing at the water/fuel interface (and no matter how pure it is from the refiner, water will get in there over time simply as a result of nightly condensation, and it's a costly repair to make... been there done that).
 
I don't know how hardened this equipment needs to be, but there are any number of solar inverter chargers and lifepo4 server rack mount batteries on the market that could do this for days.
 
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