| Author |
3 Phase KVA Calculation Question
|
|
| Fearless Fred 2007-08-22, 5:25 pm |
| Hi All!
Just want to confirm if my calculations are correct using the following
example:
3 pole mounted 100KVA Transformers connected 3 phase ... is the total KVA
output capacity of this bank of transformers 173KVA??
TIA
Fred
| |
|
| No - It's 300 kVA
"Fearless Fred" <fx08allen@shaw.ca> wrote in message
news:vo1zi.82498$rX4.11530@pd7urf2no...
> Hi All!
>
> Just want to confirm if my calculations are correct using the following
> example:
>
> 3 pole mounted 100KVA Transformers connected 3 phase ... is the total KVA
> output capacity of this bank of transformers 173KVA??
>
> TIA
>
> Fred
>
| |
| Salmon Egg 2007-08-23, 3:25 am |
| On 8/22/07 1:54 PM, in article vo1zi.82498$rX4.11530@pd7urf2no, "Fearless
Fred" <fx08allen@shaw.ca> wrote:
> Hi All!
>
> Just want to confirm if my calculations are correct using the following
> example:
>
> 3 pole mounted 100KVA Transformers connected 3 phase ... is the total KVA
> output capacity of this bank of transformers 173KVA??
>
> TIA
>
> Fred
>
>
You would get a better answer if you posted in complete and grammatical
sentences.
Three 100kVA transformers will give you a total capability of 300kVA. To get
that however, each transformer has to be run at its rated voltage and
current. It is possible to do something stupid that will result in
overheated transformers before they actually deliver rated kVA.
Bill
--
Iraq: About three Virginia Techs a month
| |
|
| Sorry about that ... will rephrase...
If I have 3 - 100KVA - 4160/480V single phase transformers connected in wye
on the primary and wye on the secondary what is the total KVA capacity of
the bank?
TIA
Fred
"Salmon Egg" <salmonegg@sbcglobal.net> wrote in message
news:C2F25D39.9579A%salmonegg@sbcglobal.net...
> On 8/22/07 1:54 PM, in article vo1zi.82498$rX4.11530@pd7urf2no, "Fearless
> Fred" <fx08allen@shaw.ca> wrote:
>
> You would get a better answer if you posted in complete and grammatical
> sentences.
>
> Three 100kVA transformers will give you a total capability of 300kVA. To
> get
> that however, each transformer has to be run at its rated voltage and
> current. It is possible to do something stupid that will result in
> overheated transformers before they actually deliver rated kVA.
>
> Bill
> --
> Iraq: About three Virginia Techs a month
>
| |
| Fearless Fred 2007-08-23, 8:25 pm |
| Sorry about that ... I will rephrase ...
If three 100KVA single phase 4160/480V transformers are connected via a wye
connection, what is the approximate total KVA output of the bank?
Thanks
Fred
"Salmon Egg" <salmonegg@sbcglobal.net> wrote in message
news:C2F25D39.9579A%salmonegg@sbcglobal.net...
> On 8/22/07 1:54 PM, in article vo1zi.82498$rX4.11530@pd7urf2no, "Fearless
> Fred" <fx08allen@shaw.ca> wrote:
>
> You would get a better answer if you posted in complete and grammatical
> sentences.
>
> Three 100kVA transformers will give you a total capability of 300kVA. To
> get
> that however, each transformer has to be run at its rated voltage and
> current. It is possible to do something stupid that will result in
> overheated transformers before they actually deliver rated kVA.
>
> Bill
> --
> Iraq: About three Virginia Techs a month
>
| |
| Don Kelly 2007-08-24, 3:25 am |
|
"Fred" <fjxallen@shaw.ca> wrote in message
news:Gynzi.84995$rX4.38029@pd7urf2no...
> Sorry about that ... will rephrase...
>
> If I have 3 - 100KVA - 4160/480V single phase transformers connected in
> wye on the primary and wye on the secondary what is the total KVA capacity
> of the bank?
>
> TIA
>
> Fred
-----------------
300KVA. If the line to line voltage is 7200V on the HV and 831V on the LV
which is a bit oddball. I assume grounded neutrals on both sides. I would
expect a more common (and technically superior) connection would be
7200Y/480 delta (line to line voltage in each case) -still 300KVA. As long
as each transformer is at rated voltage and current- it's capacity is 300KVA
--
Don Kelly dhky@shawcross.ca
remove the X to answer
----------------------------
> "Salmon Egg" <salmonegg@sbcglobal.net> wrote in message
> news:C2F25D39.9579A%salmonegg@sbcglobal.net...
>
>
| |
|
| Actually Don the connection I believe is wye-delta 4160/600V. May also be
delta/delta haven't gotten to the pole mounts yet for a look.
Thanks for the feedback.
Fred
"Fearless Fred" <fx08allen@shaw.ca> wrote in message
news:Peqzi.85921$rX4.37973@pd7urf2no...
> Sorry about that ... I will rephrase ...
>
> If three 100KVA single phase 4160/480V transformers are connected via a
> wye connection, what is the approximate total KVA output of the bank?
>
> Thanks
>
>
> Fred
>
>
> "Salmon Egg" <salmonegg@sbcglobal.net> wrote in message
> news:C2F25D39.9579A%salmonegg@sbcglobal.net...
>
>
|
|
|
|