Emergency Generator Power Distribution

The post explains a twin generator network system to be used for two separate houses during power failure and through automatic changeover.The idea was suggested by Mr. Ahmad.

The Circuit Idea and Objective


Thank you for posting the new and useful circuits. I am one of interesting in your website. This work is great done and a good information with best details explanations. In either for hobbyists and professionals.

Dear Sir. I have an idea about the Circuit breaker with different options circuit. In short words, This circuit will do the following things:

1. It has two different mains inputs : the both for up to 220 volt with one is 3.A Max. The second is 8.A Max. 2. It has two different mains outputs: the both with same input with limited current to Max is 1.A drain in the outputs. 3. It should be exchange the energy from A Input to B output or from B input to A output . If suppose that :

A has power main with same time B has an absent or failure of power Then - A gives B the electrify with Limited current to 1 ampere max. B has power main with same time A has an absent or failure of power Then - B gives A the electrify with Limited current to 1 ampere max.If A or B the current max over to 1 ampere in the drain - the Circuit should break then after while back the electrify again as the rules when A or B has an absent or failure of power. Now, If both A and B input have electricity then the circuit should give nothing in outputs.

According to the rules I made the part of it using ic 4077, which is gate of XNOR and as my background is Computer Science. I know the gates so I studied b before on it, However, I am interesting of making this circuits. My knowledge of electronic is small but I made some working circuits. I know the components well.

So, here the circuit that I created it through through the Circuit Wizard. and it working well as it only:

A has power mains with same time B has an absent or failure of power Then - A gives B the electricity. B has power mains with same time A has an absent or failure of power Then - B gives A the electricity. If both A and B input have electricity then the circuit should give nothing in outputs.

So, It needs additional things like control of currents to Limited 1 ampere as always as possible. also it needs to time delay to back turn on the electricity to an absent or failure of power on points of A or B. the delay could be to up to 1 minute.

Finally,I need some information about how to make it on oversee so could you help me please ? I attached the image of circuit within this email.



In fact this circuit has particular method so it will work as an emergency mains line-status for example of two houses with two own generators. Whenever either houses have electricity the other house will feed with this too with limited current and limited option.

So, If House No. 1 has a Generator powering by 8A max ... ->

Then B is house No.2 can take some little current of electricity. That's only if House No.2 has stopped it own generator for take a rest of time after while of working.

If again, House No.2 has Generator powering by 3A max ...-> Then House No.1 can take some little of current of electricity.

That's only If House No.1 has stopped it own generator for a take rest of time after while of working.

In main while, If House No1. gives House No.2 or vice versa .. it should taken amperage of 1.A as max as possible also in case of overcome then this circuit will take a brake and it back after 1 minute or less.

That's enough for emergency lines with no any affect of origin house's current.

Plus, those Generator may working synchronization but not always. So, When both working there no need to House No.1 gives House No.2 or vice versa in case both their own generating power working on.

So, in this case it needs to give nothing in the output due fear of short of hazard of two AC mains met.

In addition, this circuit may use it in other various applications, if it haven full control to brake of any met on tow AC mains in same time. or other thing like an inverter to join it directly with mains with free errors or risk on both house's mains and inverter.

This is maybe work so I just now have an idea and I will try to do that if you help me. I can provide more information if necessary.

Thank you again and I wish you a great time of day!

I attached circuit diagram for more details.

Best wishes,

Ahmed

A Strange The Design


1) The circuit looks incorrect in many ways

2) The emitter of the transistors are connected with the mains line and not the bridge negative.

3) The gate inputs are cross linked so if one of the generators does not have power then the relevant gate will have no defined signal to detect and might hang in an undefined zone.

The IC 4077 has the following truth table, so relating this to the above circuit looks confusing:



To me the circuit looks dangerous.

The Current Limiting Circuit


As requested in the above discussion, the current limit across the two generator outputs can be controlled by adding a small circuit stage as given in the following diagram:



The time delay feature can also be implemented easily by introducing the unused gates from the IC 4077, however unless the point no 3) is corrected or addressed, it won't be a good to assign it in the circuit.

Need Help? Please send your queries through Comments for quick replies!




Comments

Swagatam said…
Dear Ahmad, I checked your diagram but could not correctly understand the configuration, the relay connection and the current limiting connection with the IC 555 appears to be incorrect.

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