Monthly Demand Load question

[Telaid]

I have a building that has a connected load of 38kva and need to submit an application for monthly demand as kw/month. Not sure how to correctly do this. Seems simple but any help would be appreciated.

Thanks

Ron

 

[charlie b]

I . . . need to submit an application for monthly demand as kw/month.

That unit of measure has no physical meaning. It is like trying to measure your car's performance in terms of "miles per hour per month." Perhaps you meant "kw-hr/month"? That would be a measure of the monthly energy usage.

I am not sure I understand what you are looking for. Can you tell us what this "application" is all about?

 

[Telaid]

The application is for a new service for a commercial customer. Im guessing there form is incorrect and they mean kwhr/month but just wanted to make sure there wasent something i was forgetting.

 

[robbietan]

the commercial customer in your area might also have a 'demand charge' included in its monthly bills, hence the need for the (max) kW/month demand. our commercial and industrial customers here have that charge, in addition to the usual kW-Hr charge.

the reason is that the utility will supply a transformer based on the demand the customer will submit. and the supply contract will also contain the clause that the customer must adhere to the contracted demand (i.e. max kW/month) or get a new contract/transformer if his demand has exceeded the contracted capacity. A useful tool for the utility if they need to upgrade their facilities in an area.

 

[wirenut1980]

Robbietan has the right idea on the demand charge. They are asking you what you think the maximum kW the business will be using. A demand meter will take that maximum value and will store it until it is reset by a meter reader each month, and the customer will receive a demand charge each month in addition to total consumption (kW-hrs). However, the utility should be able to estimate what your maximum demand (kW) is going to be, simply by looking at a similar business of a similar size and how many kW they are consuming. If your NEC load calculations comes up with 38 kVA of connected load, I would think your max kW would be around 20 kW (without knowing any other information based on experience).

What kind of business?

 

[LarryFine]

However, the utility should be able to estimate what your maximum demand (kW) is going to be, simply by looking at a similar business of a similar size and how many kW they are consuming.

This is actually part of our load letter.