Maximum Demand Controller

Google:

MAXIMUM DEMAND CONTROLLER circuit diagram

Who's acting? At least I know how to find information on the subject at hand. Do you?

And, as already stated, there is that intellectual property thing to consider.

Ya you are correct But i searched it about it already but ended in vain.That is why i replied like this.

LOL, I did Google that, I got a return of this thread! Caught in a Google feedback loop...

I also got a few other places where the OP posted the same question.

This is nothing new. 25 years ago I used to sell and install a system made by Square-D (now part of Groupe Schneider) called "The Watchdog". It was a Maximum Demand Controller that tied into Symax PLCs as the load shedding control devices**. Big waste of money, because any decent PLC programmer could program the PLC to do the exact same thing without the "Watchdog" hardware. All it really consisted of was a group of transducers for the power system and a very basic logic controller, much less powerful than the PLC is had to connect to!

Maximum Demand Control no longer needs a "controller" per se. Most Energy Monitoring Software now includes this functionality, all you need is an interface controller like a PLC that can shed loads accordingly. We use Invensys / Wonderware's product offering, called Facilities Management Software Solutions. It does a lot more than just maximum demand control, but that is a function inherent in the package. I've also use Siemens WinPM Power Monitoring software to do the same thing. Both of them just need some sort of hardware platform to talk to that does the actual switching of contactors to shed the loads.

**What most of these systems fail to mention is that the loads have to have contactors associated with them. In the case of lighting, that often means adding the contactors if they don't exist. In the case of HVAC loads, you can get into serious problems with air balancing as well. It's much more involved than just putting in a black box.

Thanks,

I'm always suspecious of someone who wants a free copy of someone's schematic so they can "modify" it.

Cheers.

Thanks but i want to design my own Load management circuit. Can you please help me with this

"I read about MAXIMUM DEMAND CONTROLLER. its quite interesting and I want to modify it."

Do you want to modify the content of document??...It might be copy righted.

Its not any document its a product I want to add some new features to it

Ah...You read the product and not the document. What are the features you want to add?...

Will this product be covered by the warranty of the firm that adds the new features?

Has the original manufacturer consented to its additional features?

Why isn't the original manufacturer already adding these new features so as to expand market penetration?

I am Engineer from India where energy management software are not popular and affordable that is why i plan to modify this MDController such a way that it ll act like demand side manager

Dear...

The maximum demand controller company spend million of dollars for research, study, analysis, making protocol type, tested again and again and many more hard works from day till night and some of the engineer never go home to sleep where his wife is waiting for him to come home, and finally,they had come out with the final design that able to calculate, record and control the maximum demand, do you think that they will give you the circuit digram for you to modify??

You are correct . I am trying to modify it for High energy efficiency. I am working in the algorithm part. So i could not find time for circuit dig any how as u said i have seriously look into this matter

The function of a MaxDemCont is purely to limit the amount of energy being used at any specific time in order to minimize the monthly cost of that electric power. It is totally independent of the "quality" of the energy use (efficiency)- that is up to the programmers who determine what they want to keep running as the load increases. Often, they do not make that decision relative to the efficiency of a product, but relative to the NEED for the product or its output.

IF you are serious about trying to identify optimum efficiency, just do the basic calculations on output vs. input energy. If some product is operating below some defined standard- EPA EnergyStar, Best Available Technology, etc., then the owner MIGHT choose to replace it if the economics hold together. However, I have never seen any user applying a MaxDemCont for the purpose of ONLY running the highest efficiency devices.

Doing the calculations and changing inefficient products would also allow the customer to run more devices at the defined peak power draw OR allow the customer to lower the programmed peak power draw, but it is still a direct calculation of product efficiency that gets you to that point.

All of the marketing books I read about say that there will never be a maximum demand for a great product. How can a machine possibly control the will of several billion people.

So where in the world did you read about this wonder device? If I was trying to find out everything I could about something I read, I'd try to contact the author of the article I read. If the author rebuffed me for any stupid reason, I'd next use several search engines to locate other articles on the blessed device. I would in particular investigate as many scholarly papers as I could get my hands on with my available budget.

If all of these efforts still left me frustrated then and only then as a last resort would I try a public forum to suggest other avenues I had not found. I would certainly explain everything that I did know about this wonder device to the forum so that they could know what the frell I wanted to learn about and how much I already comprehended. If the article was available on the web I would certainly include a link so others could at least know what I know. I would certainly not ask for anything that might be considered proprietary information like a schematic diagram.

So to give you a Socratic answer to your question, can you first help yourself so that we can help you?

Research tells us that controlled drinking is not only possible, but it is quite common among people who used to drink heavily. Many people cut down on their alcohol intake without medical or therapeutic help, although it is advisable to discuss your alcohol intake with your family doctor before trying to change it. It can be dangerous to quit without adequate medical support with your maximum demand for alcohol.

Some people who drink heavily are better off avoiding alcohol completely. But most can get control over their drinking and drink safer levels of alcohol without having to quit entirely. If you plan to attempt to control your drinking, there are several steps you should take to assist you in this process.

• Talk to your family doctor about whether moderation or abstinence is right for you.
• Keep track of how much you are drinking.
• Figure out your daily blood alcohol concentration (BAC).
• Set your daily and weekly alcohol limits.
• Change the way you drink.
• Develop alternatives to drinking that work for you.
• Develop more effective self-care, coping and stress management skills.

There is a lot on this list, and you might benefit from the help of a counselor in working through it. Some treatment programs will accept clients with goals of moderation, while others will only provide treatment to people who intend to become abstinent. If you believe moderation is the right goal for you, you owe it to yourself to find a program that will support you in your new lifestyle.

So let me get this straight;

it's a product

you read about it

you want to re engineer it

So are you not telling us what you read or what demand it controls - so we can't "beat you to the punch"?

Or are you expecting us to just hand over every circuit diagram we know of that might be it?

And why aren't you contacting the owners of the IP for such information?

Ok, check out the diagrams here:

http://www.acadz.com/ASEEMIVPvsFIFO99web.htm

You do not need to steal intellectual property by copying schematics! Why don't you create your own schematics if you know what the device is all about?