KVA's and electrical connections to a residential development

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In summary, the speaker is new to the forum and has a question about their application for electrical connections to a residential development. They have provided a breakdown of all the loads as single phase domestic, but the electricity company has stated that their infrastructure cannot support the 600kva load and they need to pay for a new transformer. The speaker is confused as they believed the existing 200kva three phase transformer would be enough for their 3 x 200kva requirements, but the transformer KVA does not get multiplied by the number of wires. The total remains 600kva regardless of the number of lines.
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teslaspal
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Hi there, new to the forum and had a question I was hoping that you folks could help out with.

I have recently made application to our local electricity company for electrical connections to a residential development.

I have given them a breakdown of all the loads which are single phase domestic.

They have come back and mentioned that they don't think the infrastructure can support the load and they need us to pay for a new transformer.

They only have 200kva available from the existing three phase transformer and I need 600kva.

Now, I am slightly confused with this, as surely the 200kva (three phase) will support my 3 x 200kva requirements?
 
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  • #2
The transformer KVA does not get multiplied by the number of wires.
That is a total.
So if you draw 1 line x 600, 2 lines x 300 or 3 lines x 200, it still adds up to 600kva that the transformer sees.
 
  • #3


I can understand your confusion with this situation. It is important to understand the concept of kilovolt-amperes (KVA) and how it relates to electrical connections in a residential development.

KVA is a unit of electrical power that represents the amount of energy a system can handle. It is a combination of both the voltage and current in a system. In your case, the electricity company has mentioned that they only have 200kva available from the existing three-phase transformer. This means that the transformer can only handle a maximum of 200kva of power at a time.

When you mention that you need 600kva for your residential development, you are referring to the total load of all the single-phase domestic loads. However, this does not necessarily mean that the transformer can handle this load. It is possible that the existing transformer is already at its maximum capacity and cannot support any additional load.

In order to determine if the existing infrastructure can support your 600kva load, the electricity company will need to conduct a thorough assessment of the system. This may include analyzing the current load on the transformer, the potential for future growth in the area, and the capacity of the transformer itself.

If the assessment shows that the existing infrastructure cannot support your 600kva load, then it is necessary to install a new transformer with a higher capacity. This will ensure that your residential development has a stable and reliable source of electricity.

In conclusion, it is important to consider the capacity of the existing infrastructure when requesting electrical connections for a residential development. It is also important to work closely with the electricity company to determine the best solution for meeting your energy needs.
 

1. What is a KVA and why is it important in residential development?

A KVA (kilovolt-ampere) is a unit of electrical power that measures the total amount of power used in a system. In residential development, it is important because it helps determine the size and capacity of electrical equipment needed to meet the demands of the development.

2. How is the electrical connection to a residential development determined?

The electrical connection to a residential development is determined by the expected load demand of the development. This includes factors such as the number of homes, size of homes, and expected usage of electrical appliances.

3. Can a residential development have multiple electrical connections?

Yes, a residential development can have multiple electrical connections if the expected load demand exceeds the capacity of a single connection. In this case, the development may require a secondary or tertiary connection to meet the demand.

4. What is the role of a transformer in electrical connections to a residential development?

A transformer is used to step down the voltage from the main power supply to a lower voltage that is suitable for residential use. It also helps distribute power to different areas of the development.

5. Are there any safety measures that need to be taken when connecting electrical systems to a residential development?

Yes, safety measures such as proper grounding, installation of circuit breakers, and adherence to building codes are crucial in ensuring the safety of the residential development. It is important to hire a licensed electrician for any electrical connections to ensure all safety measures are met.

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