AIC ratings

[Jay Sklarew]

How do you find AIC ratings from FPL

 

[skeshesh]

Welcome to the forum Jay.

Not everyone here is from around Florida, so you'd want to clarify terms like FPL. I'm assuming you mean Florida Power & Light company.

Are you really looking for AIC ratings? My guess is you're looking for the available fault current at whatever point you're putting new equipment in. Then you can determine the AIC rating of your equipment to not be lower than the maximum possible short circuit current (available fault current). You can request that information from the power company.

Not really sure why you would want to know the AIC rating of utility equipment...

 

[Dennis Alwon]

How do you find AIC ratings from FPL

Welcome to the forum...Did you call them and ask for the aic at the transformer?

 

[jim dungar]

Utilities provide an 'SCA', available short circuit amps or they may say something like "MINIMUM OF 22KA SERVICE ENTRANCE EQUIPMENT REQUIRED", in either case it is you who decides what AIC rating the equipment will need to be.

For example, while the given utility requirement of 22kA minimum could be be with 22kAIC equipment, many designers allow for future changes by specifying a higher value.

 

[templdl]

Try this, just assume an unlimited fault current of the primary to find what the available fault current of the secondary will be.
The select the devices based upon that.
Should that calculation be close to the lower end of the fault current, such as your calculated fault current being
55KA where 65KAIC would be required it may be benificial to save money if you could use a 50KAIC device if one is available. As such it would be to your advantage to find out what the actual available fault current is on the primary which would give you the justification to use a 50KAIC device.

Otherwise is it worth your time to find out what the actual available fault current is if the result would make a difference in the KAIC rating anyway.

 

[jim dungar]

Try this, just assume an unlimited fault current of the primary to find what the available fault current of the secondary will be.

Many, if not most, utilities do not tell you what size transformer they will be supplying, as they reserve the right to change it based on their needs.

This is from Xcel Energies

If the customer's power requirement, within six months after the installation of transformers, proves to be less than shown in the application for service, the Company may make a reduction in the installed transformer capacity and the customer will be required to pay the Company the cost of making the change.
If the customer's power requirement, within six months after the installation of transformers, proves to be more than the installed transformer capacity, the Company may make an increase in the installed transformer capacity and the customer will be required to pay to the Company the cost of making the change.

 

[bphgravity]

How do you find AIC ratings from FPL

GO HERE:

http://www.fpl.com/doingbusiness/builder/stages/design.shtml