Emergency Power Distribution-Urgent

In this case you may need to carried out the detailed study using any of the electrical software i.e ETAP/SKM/CYME etc Power flow in our case needs to be checked using the load flow module. I believe there will be a MVAR/Voltage drop issues since u r stepping up and stepping down the voltage through 2 nos of transformer and through the connected cables. Needs to DG capacity for this arrangement. Since u r back feeding the power to the system you need to check whether the transformer is designed for the bi-directional power flow and also check any other issues relating to the vector group mating. Also using transient module you can actually check the motor start issues with this arrangement.

In this case you may need to carried out the detailed study using any of the electrical software i.e ETAP/SKM/CYME etc Power flow in our case needs to be checked using the load flow module. I believe there will be a MVAR/Voltage drop issues since u r stepping up and stepping down the voltage through 2 nos of transformer and through the connected cables. Needs to DG capacity for this arrangement. Since u r back feeding the power to the system you need to check whether the transformer is designed for the bi-directional power flow and also check any other issues relating to the vector group matching. Also using transient module you can actually check the motor start issues with this arrangement.

In this case you may need to carried out the detailed study using any of the electrical software i.e ETAP/SKM/CYME etc Power flow in our case needs to be checked using the load flow module. I believe there will be a MVAR/Voltage drop issues since u r stepping up and stepping down the voltage through 2 nos of transformer and through the connected cables. Needs to DG capacity for this arrangement. Since u r back feeding the power to the system you need to check whether the transformer is designed for the bi-directional power flow and also check any other issues relating to the vector group matching. Also using transient module you can actually check the motor start issues with this arrangement.

Hello Department of Redundancy Department Hello,

I keep getting this echo in my head of undefined acronyms.

DRD: _{whaw whadda wha wha whaa}

Me: What? Could you repeat that?

DRD: What? Could you repeat that?

Me: Very Funny. Oh that's right you have to be redundant.

Me: What about my undefined acronyms?

Me: What about my undefined acronyms?

DRD: You need an acronymectomy.

DRD: You need an acronymectomy.

<...I keep getting this echo in my head of undefined acronyms....>

One can get pills for that, these days.

So why not use a direct diesel drive fire pump instead and cut out all this electrickery nonsense?

Hire a REAL Electrical Engineer to work with Somebody on this project.

Or, do as PWSlack suggests.

If I were setting up a fire system I would be inclined to use a engine driven FM approved pump system. Several manufactures of these products are approved by Factory Mutual and meet all state and federal codes for fire protection. I would stay away from a generators for emergency power to a fire pump. Not a stable platform for 100 percent run-able condition.

You will find the most fire pump systems are designed to run no matter what, once they are brought on line and have been test to do so.

Diesel gen should be cused as a standby to tha main power system for auto starting the fire pump in case of power failure only.

Dear,

The scheme is rather in efficient, but in principle, 100% possible, subject to proper designing / safety / protections.

We have just recently done the same thing at one of our projects. - when we met with the power crisis.

We ran 500kva * 3 no. DG sets in sync.

Fed the power thru existing PCC in reverse to secondary of Distribution Tr.

Step up to 11kv, fed to the remote sub station - 1000 Mtr. away.

There, we charged the 11kv / 433v transformer, worked well !

But, precaiutions taken.

Specially, you have to over come the starting surge of the transformer. ( which is double the rated current of Tr. )

Efficient? Who said anything about efficient. I presume that there must be some valid reason for indirectly driving a fire pump with a diesel engine through multiple electrical connections but efficiency will certainly not be a reason. The most efficient thing would be redundancy of this facility in some fashion combined with swift egress capability of all occupants and let the place burn to the ground. But to say that this proposal is true requires facts not apparent. (What does this facility do? Where is this facility? etc.)

As somebody else here pointed out, the critical factor for running a fire pump is reliability to operate during the critical condition of a building fire. Adding the multiple power translations of converting mechanical power to various electrical powers and back to mechanical seems to me to be just asking for more possible failure points from a piece of emergency equipment. Adding to my concerns is that the proposed voltages are clearly lethal voltages and this pump will likely be pushing water. Most firefighters I know want to be able to remove all electrical power from a facility easily to reduce hazards.

My point is that fire pumps are an emergency tool. The local emergency responders must know what to expect at any facility. The OP must then construct the backup power for this pump according to the local regulations, what ever they are!