Maximum demand calculator:
Enter the Peak Operating Load for 30 minutes’ block and power factor between 0 to 1, then press the calculate button to get the Maximum demand in kVA.
Maximum demand Calculation:
The maximum demand in kVA is nothing but a peak operating load (maximum load) in kW of the consumer for the specific interval divided by the operating power factor. The interval will be defined by your electricity provider. Hence, the maximum demand formula can be written as,
Maximum demand in kVA = Peak Load in kW / Power factor
If you know load factor and connected load means
Maximum Demand= Connected Load x Load Factor / Power Factor.
In India, Maharashtra state MSEB has 30 minutes’ block, which means, the continuous peak demand will be calculated within any 30 minutes. Gujarat has 15 minutes and 30 minutes’ block.
Note that the maximum demand will be calculated from kVA only.
Example:
Now you are running 5 numbers of 5.5 kW motor @ 90% of the load with 0.86 pf. Calculate the maximum demand.
Peak Load = 5 * 5.5 * 0.9 = 24.75kW
Maximum demand = Peak load / power factor
=24.75 / 0.86
= 28.77kVA
Look at the table of India’s all-state maximum demand charges per kVA. The penalty is applicable when the maximum demand exceeds the contracted demands.
| Maximum Demand Charges | ||
| State | MD Charges (INR Per kVA) | Penalty (%) |
| Telangana | 390 | 150 |
| Tamilnadu | 350 | 130 |
| Kerala | 300 | 130 |
| Karnataka | 275 | 200 |
| Maharashtra | 150 | 150 |
| Pondicherry | 300 | 200 |
| Andhra Pradesh | 475 | 150 |
| Assam | 375 | 120 |
| Bihar | 330 | NA |
| Chandigarh | 300 | 120 |
| Chhattisgarh | 350 | 115 |
| Delhi | 350 | 130 |
| Goa | 200 | NA |
| Gujarat | 360 | 200 |
| Haryana | 750 | NA |
| Himachal Pradesh | 400 | NA |
| Jammu and Kashmir | 135 | NA |
| Jharkhand | 400 | NA |
| Madhya Pradesh | 310 | 120 |
| Odisha | 250 | NA |
| Punjab | 179 | 250/kVA |
| Rajasthan | 270 | NA |
| Sikkim | 555 | NA |
| Uttar Pradesh | 340 | NA |
| Uttarakhand | 360 | NA |
| West Bengal | 384 | 200 |
| NA- Not Available | ||
How to reduce Maximum demand:?
- Maintain power factor near to unity. Since the power factor is inversely proportional to the maximum demand. Hence by increasing power factor, the maximum demand will be reduced.
- Avoid bulk switch On load. Keep scheduling the load.
- Install Speed driver.
- Optimize the single load. Example, you have two motors which is operated at 50% of load, here you can cut off one motor and shift the load to a single motor. By the way, we can reduce 30% of the load.
If Exceed the maximum demand, what effect will be happen in EB side.
They charge additionally by 50% of the rate for which exceeding the nominal.
Sorry sir, How to they find in EB side.
Yes, they find from the EB side energy meter (main meter).
Thanks bro.i under stood best explanation
I am again repeating.
Suppose I use a load of 2kw for 10 minutes only and rest of the time it is less than 0.5 kw.
What will be mdi.
Thanks.
I too received current month else bill, charging rs 178.12 as MD penalty. It is also mentioned recorded MD is 4.2 kw. In our House, we have 3KW connection. This is the first time. Can some one advise how to control or avoid getting MD penalty. We are in mysore, Karnataka
The think is you should not switch on the all electricity loads at once. For example, if your AC is on, then do not switch on the other electrical loads such as heater, induction stove, geyser etc. Use load shedding.
We have a single story house with 3 ph, 4 wire meter installed at our house, Our sanctioned load is 4.0KW. There are no demand charges for residential customers, Some have time of day billing but we don’t. We have a graduated rate for electrical consumption. i.e. first 100 KWH billed at X rate second 300 KWH billed at Y and so forth.
Our electric utility is owned by Chinese owners and they are engaged in many illegal practices. For example
What is the definition of connected load? They usually define this as all the electrical loads in the house, drawing current or not. To my lay understanding connected load is every electrical load that is drawing current at any point in time. If the load is plugged in but not switched on then it’s not part of connected load. Am I right or wrong. In Oct 2020 when my service was started they charged me over RS 30,000 for bill of the first first month. I had to take them to the court to get my money back.