I understand that there is a bit of fudge factors involved, but I want
to know, approximately what size motors (with a usual load, like a
compressor or a lathe) can I start with a 45 kVA transformer feeding it.

No soft start of course.

Thanks

On Wed, 04 Jan 2012 22:27:16 -0600, Ignoramus8679
wrote:

I understand that there is a bit of fudge factors involved, but I want
to know, approximately what size motors (with a usual load, like a
compressor or a lathe) can I start with a 45 kVA transformer feeding it.

No soft start of course.

Thanks

15hp

Gunner

One could not be a successful Leftwinger without realizing that,
in contrast to the popular conception supported by newspapers
and mothers of Leftwingers, a goodly number of Leftwingers are
not only narrow-minded and dull, but also just stupid.
Gunner Asch

Gunner Asch wrote:

On Wed, 04 Jan 2012 22:27:16 -0600, Ignoramus8679
wrote:

I understand that there is a bit of fudge factors involved, but I want
to know, approximately what size motors (with a usual load, like a
compressor or a lathe) can I start with a 45 kVA transformer feeding it.

No soft start of course.

Thanks

15hp
Well, 15 Hp is about 11 KW continuous, maybe 15 KVA including the power
factor. But, such a transformer should be able to handle a larger motor.
You should be able to start a 50 Hp motor, although the line voltage might
dip just a bit. Typical transformers are designed to permit starting
motors near the full running KVA of the motor. Not sure how your running
the transformer in reverse and altering the primary turns have affected
this.

Jon

On 2012-01-05, Jon Elson wrote:
Gunner Asch wrote:

On Wed, 04 Jan 2012 22:27:16 -0600, Ignoramus8679
wrote:

I understand that there is a bit of fudge factors involved, but I want
to know, approximately what size motors (with a usual load, like a
compressor or a lathe) can I start with a 45 kVA transformer feeding it.

No soft start of course.

Thanks

15hp
Well, 15 Hp is about 11 KW continuous, maybe 15 KVA including the power
factor. But, such a transformer should be able to handle a larger motor.
You should be able to start a 50 Hp motor, although the line voltage might
dip just a bit. Typical transformers are designed to permit starting
motors near the full running KVA of the motor. Not sure how your running
the transformer in reverse and altering the primary turns have affected
this.

Jon

I think that my custom tap reduced the kVA a little bit, that's all.

i

On 1/5/2012 5:04 PM, Ignoramus8679 wrote:
On 2012-01-05, Jon wrote:
Gunner Asch wrote:

On Wed, 04 Jan 2012 22:27:16 -0600, Ignoramus8679
wrote:

I understand that there is a bit of fudge factors involved, but I want
to know, approximately what size motors (with a usual load, like a
compressor or a lathe) can I start with a 45 kVA transformer feeding it.

No soft start of course.

Thanks

15hp
Well, 15 Hp is about 11 KW continuous, maybe 15 KVA including the power
factor. But, such a transformer should be able to handle a larger motor.
You should be able to start a 50 Hp motor, although the line voltage might
dip just a bit. Typical transformers are designed to permit starting
motors near the full running KVA of the motor. Not sure how your running
the transformer in reverse and altering the primary turns have affected
this.

Jon

I think that my custom tap reduced the kVA a little bit, that's all.

i
Your building metering probably has a meter that records "demand" and
will give you a BIG hit on your electrical bill every time you start a
big motor. Be sure to calculate that into the price of your big motor.

Paul

On 2012-01-06, Paul Drahn wrote:
On 1/5/2012 5:04 PM, Ignoramus8679 wrote:
On 2012-01-05, Jon wrote:
Gunner Asch wrote:

On Wed, 04 Jan 2012 22:27:16 -0600, Ignoramus8679
wrote:

I understand that there is a bit of fudge factors involved, but I want
to know, approximately what size motors (with a usual load, like a
compressor or a lathe) can I start with a 45 kVA transformer feeding it.

No soft start of course.

Thanks

15hp
Well, 15 Hp is about 11 KW continuous, maybe 15 KVA including the power
factor. But, such a transformer should be able to handle a larger motor.
You should be able to start a 50 Hp motor, although the line voltage might
dip just a bit. Typical transformers are designed to permit starting
motors near the full running KVA of the motor. Not sure how your running
the transformer in reverse and altering the primary turns have affected
this.

Jon

I think that my custom tap reduced the kVA a little bit, that's all.

i
Your building metering probably has a meter that records "demand" and
will give you a BIG hit on your electrical bill every time you start a
big motor. Be sure to calculate that into the price of your big motor.

How does that metering work?

i

Ignoramus8679 wrote:



Your building metering probably has a meter that records "demand" and
will give you a BIG hit on your electrical bill every time you start a
big motor. Be sure to calculate that into the price of your big motor.

How does that metering work?

i
Well, if your meter says "demand" anywhere on it, then it is.
For instance, our university has demand metering, a cassette tape
(probably replaced with something more modern, now) records power
demand every 15 seconds, all year long. Our power bill is just
the worst peak of the entire year, multiplied out to the full
year! Suddenly, you can understand why they have this huge energy
monitoring and motor control system, to make sure that peak is
flattened way out.

But, that is for a large business, with 2 transformers as big as
my house.

If you are lucky, you don't have a demand meter, and are billed by
just plain consumption. If your meter has an LCD display, you may be
able to see all the parameters it is recording and radioing to the
power company. They usually cycle through several parameters every
minute.

If you don't know about this smart meter stuff, the meters have
a spread-spectrum radio transmitter in them. On poles scattered
around, there are boxes with Yagi antennas pointing at a tall building
somewhere and a whip antenna pointing straight down. The whip picks
up the transmissions from all the meters in a couple block area and
then sends them through the Yagi to a collection point (a couple
of these in each town) that then packs this all up and sends it to the power
company's data center. They use it both for network monitoring
(if a bunch of meters in an area stop reporting power, they know
they have an outage) and for billing. In some areas they can interface
to air conditioners and such to shut them off during peak consumption
and give you a discount.

Jon

kva stands for kilo =1000 volts * amps
now any body would say that volts times amps is watts which is true in a dc circuit but in ac there is factors such as the the windings in the motor which when layer against the next winding induces an opposite current flow which opposed the current flow in the first winding that is why we use VA volts amps or KVA 1000volts amps
now the motor load allowed would would be maxed by the main circuit breaker after the transformer a 45 kva would be proving about a 400 amp service in my industry. now if you figure that 50hp is 37300watts 1hp is 746w 50 times 746 =37300w divide that by the voltage rating usually 240 = 155amps. this is all single phase power if you are talking 3phase power that is another monster and alot of other calculations because there is many different voltages 120/208 120/240 277/480 347/600 and so on
clear as mud

On 1/5/2012 8:15 PM, Ignoramus8679 wrote:
On 2012-01-06, Paul wrote:
On 1/5/2012 5:04 PM, Ignoramus8679 wrote:
On 2012-01-05, Jon wrote:
Gunner Asch wrote:

On Wed, 04 Jan 2012 22:27:16 -0600, Ignoramus8679
wrote:

I understand that there is a bit of fudge factors involved, but I want
to know, approximately what size motors (with a usual load, like a
compressor or a lathe) can I start with a 45 kVA transformer feeding it.

No soft start of course.

Thanks

15hp
Well, 15 Hp is about 11 KW continuous, maybe 15 KVA including the power
factor. But, such a transformer should be able to handle a larger motor.
You should be able to start a 50 Hp motor, although the line voltage might
dip just a bit. Typical transformers are designed to permit starting
motors near the full running KVA of the motor. Not sure how your running
the transformer in reverse and altering the primary turns have affected
this.

Jon

I think that my custom tap reduced the kVA a little bit, that's all.

i
Your building metering probably has a meter that records "demand" and
will give you a BIG hit on your electrical bill every time you start a
big motor. Be sure to calculate that into the price of your big motor.

How does that metering work?

i
All depends on the rate schedule your building is on. Could be the
instantaneous peak KW reading over a 15 minute period. that is what mine
is. OR could be the peak averaged for one second ever so many minutes.

To be sure, get your bill and call the customer service rep and ask them
about it based on your rate schedule.

Every state is different.

Paul

On Fri, 6 Jan 2012 07:57:26 +0000, ernremy
wrote:


'Jon Elson[_3_ Wrote:
;2778083']Gunner Asch wrote:
-
On Wed, 04 Jan 2012 22:27:16 -0600, Ignoramus8679
lid wrote:
-
I understand that there is a bit of fudge factors involved, but I want
to know, approximately what size motors (with a usual load, like a
compressor or a lathe) can I start with a 45 kVA transformer feeding
it.

No soft start of course.

Thanks-

15hp-
Well, 15 Hp is about 11 KW continuous, maybe 15 KVA including the power
factor. But, such a transformer should be able to handle a larger
motor.
You should be able to start a 50 Hp motor, although the line voltage
might
dip just a bit. Typical transformers are designed to permit starting
motors near the full running KVA of the motor. Not sure how your
running
the transformer in reverse and altering the primary turns have affected
this.

Jon

kva stands for kilo =1000 volts * amps
now any body would say that volts times amps is watts which is true in
a dc circuit but in ac there is factors such as the the windings in the
motor which when layer against the next winding induces an opposite
current flow which opposed the current flow in the first winding that is
why we use VA volts amps or KVA 1000volts amps
now the motor load allowed would would be maxed by the main circuit
breaker after the transformer a 45 kva would be proving about a 400 amp
service in my industry. now if you figure that 50hp is 37300watts 1hp is
746w 50 times 746 =37300w divide that by the voltage rating usually
240 = 155amps. this is all single phase power if you are talking 3phase
power that is another monster and alot of other calculations because
there is many different voltages 120/208 120/240 277/480 347/600 and so
on
clear as mud


I always worry about startup current. Some motors can start at 400% of
run amps

Gunner

One could not be a successful Leftwinger without realizing that,
in contrast to the popular conception supported by newspapers
and mothers of Leftwingers, a goodly number of Leftwingers are
not only narrow-minded and dull, but also just stupid.
Gunner Asch

"Ignoramus8679" wrote in message
...
I understand that there is a bit of fudge factors involved, but I want
to know, approximately what size motors (with a usual load, like a
compressor or a lathe) can I start with a 45 kVA transformer feeding it.


Provided an unloaded shaft, 45 kw from a standstill I would suspect.

On Wed, 04 Jan 2012 22:27:16 -0600, Ignoramus8679
wrote:

I understand that there is a bit of fudge factors involved, but I want
to know, approximately what size motors (with a usual load, like a
compressor or a lathe) can I start with a 45 kVA transformer feeding it.

No soft start of course.

Thanks

Hey Iggy,

Hammond (one of the "better" transfomer makers)
say that their 45kVA 3phase transormer is good for :

125 amps @ 208VAC (= approx. 50hp )
108 amps @ 240VAC (= approx. 40hp )
54.2 amps @ 480VAC (= approx. 20hp )
43.4 amps @ 600VAC (= approx. 15hp )



Take care.

Brian Lawson

On 2012-02-02, Brian Lawson wrote:
On Wed, 04 Jan 2012 22:27:16 -0600, Ignoramus8679
wrote:

I understand that there is a bit of fudge factors involved, but I want
to know, approximately what size motors (with a usual load, like a
compressor or a lathe) can I start with a 45 kVA transformer feeding it.

No soft start of course.

Thanks

Hey Iggy,

Hammond (one of the "better" transfomer makers)
say that their 45kVA 3phase transormer is good for :

125 amps @ 208VAC (= approx. 50hp )
108 amps @ 240VAC (= approx. 40hp )
54.2 amps @ 480VAC (= approx. 20hp )
43.4 amps @ 600VAC (= approx. 15hp )


Is that starting amps or running amps?

i

On 2012-02-02, Brian Lawson wrote:
On Wed, 04 Jan 2012 22:27:16 -0600, Ignoramus8679
wrote:

I understand that there is a bit of fudge factors involved, but I want
to know, approximately what size motors (with a usual load, like a
compressor or a lathe) can I start with a 45 kVA transformer feeding it.

No soft start of course.

Thanks

Hey Iggy,

Hammond (one of the "better" transfomer makers)
say that their 45kVA 3phase transormer is good for :

125 amps @ 208VAC (= approx. 50hp )
108 amps @ 240VAC (= approx. 40hp )
54.2 amps @ 480VAC (= approx. 20hp )
43.4 amps @ 600VAC (= approx. 15hp )

The more I think about the above, the less sense it makes.

54 amps at 480VAC is the same HP as 108 amps at 240 VAC, no?

i

Ignoramus10043 wrote:


Hammond (one of the "better" transfomer makers)
say that their 45kVA 3phase transormer is good for :

125 amps @ 208VAC (= approx. 50hp )
108 amps @ 240VAC (= approx. 40hp )
54.2 amps @ 480VAC (= approx. 20hp )
43.4 amps @ 600VAC (= approx. 15hp )

The more I think about the above, the less sense it makes.

54 amps at 480VAC is the same HP as 108 amps at 240 VAC, no?

i
These numbers must refer to one specific multi-tap transformer,
which has some current limits on the primary winding. When you
change the primary taps for different output voltage, the
rated current available at the secondary would change.

Of course, on YOUR transformer, which you are running backwards,
you'd just have to make sure you stay within the ratings of
each winding, and mostly forget the KVA rating.

So, in the above table, the 43.4 Amps at 600 V is at the secondary.
When you change the taps, the current has to go down. On the other
hand, the KVA should still end up being the same, so the HP also ought
to be the same. Also, 43.4 * 600 * 1.732 = 45 KVA, which should be good
for 50+ shaft output HP from a motor. So, maybe the HP calculation
above was added by somebody who doesn't know what they are doing.

So, I guess I agree with you, the HP part does NOT make sense.

Jon

On 2012-02-03, Jon Elson wrote:
Ignoramus10043 wrote:


Hammond (one of the "better" transfomer makers)
say that their 45kVA 3phase transormer is good for :

125 amps @ 208VAC (= approx. 50hp )
108 amps @ 240VAC (= approx. 40hp )
54.2 amps @ 480VAC (= approx. 20hp )
43.4 amps @ 600VAC (= approx. 15hp )

The more I think about the above, the less sense it makes.

54 amps at 480VAC is the same HP as 108 amps at 240 VAC, no?

i
These numbers must refer to one specific multi-tap transformer,
which has some current limits on the primary winding. When you
change the primary taps for different output voltage, the
rated current available at the secondary would change.

Of course, on YOUR transformer, which you are running backwards,
you'd just have to make sure you stay within the ratings of
each winding, and mostly forget the KVA rating.

So, in the above table, the 43.4 Amps at 600 V is at the secondary.
When you change the taps, the current has to go down. On the other
hand, the KVA should still end up being the same, so the HP also ought
to be the same. Also, 43.4 * 600 * 1.732 = 45 KVA, which should be good
for 50+ shaft output HP from a motor. So, maybe the HP calculation
above was added by somebody who doesn't know what they are doing.

So, I guess I agree with you, the HP part does NOT make sense.

Jon

Yep, no sense.

As for the 45 kVA reverse wired transformer, I am using it multiple
times every day now, it works very well, I am happy. I tested five 1
ton Dayton hoists yesterday.

i

Ignoramus31868 wrote:



As for the 45 kVA reverse wired transformer, I am using it multiple
times every day now, it works very well, I am happy. I tested five 1
ton Dayton hoists yesterday.
Well, I think it is bigger than you need, although I guess
you want to be able to test screw compressors, which might be
the only thing you would be dealing in that have such big
motors.

Jon

On 2012-02-04, Jon Elson wrote:
Ignoramus31868 wrote:



As for the 45 kVA reverse wired transformer, I am using it multiple
times every day now, it works very well, I am happy. I tested five 1
ton Dayton hoists yesterday.
Well, I think it is bigger than you need, although I guess
you want to be able to test screw compressors, which might be
the only thing you would be dealing in that have such big
motors.

Screw and reciprocating, yes. I used this transformer to test a Quincy
reciprocating compressor with two 10HP heads, one head at a time. I
do not think that the transformer is bigger than I need, I would
really like it to be 110 kVA.

i

On Sat, 04 Feb 2012 05:21:12 -0600, Ignoramus27096
wrote:

On 2012-02-04, Jon Elson wrote:
Ignoramus31868 wrote:



As for the 45 kVA reverse wired transformer, I am using it multiple
times every day now, it works very well, I am happy. I tested five 1
ton Dayton hoists yesterday.
Well, I think it is bigger than you need, although I guess
you want to be able to test screw compressors, which might be
the only thing you would be dealing in that have such big
motors.

Screw and reciprocating, yes. I used this transformer to test a Quincy
reciprocating compressor with two 10HP heads, one head at a time. I
do not think that the transformer is bigger than I need, I would
really like it to be 110 kVA.

i

Hammond, Acme, and Hevi-Duty all say a 45kVA transformer is the proper
size for a 30HP motor with frequent starting (more than once per
hour). 40HP is OK if the motor is started less than once per hour.

--
Ned Simmons

On Thu, 02 Feb 2012 18:24:31 -0600, Ignoramus10043
wrote:
SNIP
Is that starting amps or running amps?

i
Noted as "FULL LOAD CURRENTS"

Brian Lawson

On 2012-02-04, Ned Simmons wrote:
On Sat, 04 Feb 2012 05:21:12 -0600, Ignoramus27096
wrote:

On 2012-02-04, Jon Elson wrote:
Ignoramus31868 wrote:



As for the 45 kVA reverse wired transformer, I am using it multiple
times every day now, it works very well, I am happy. I tested five 1
ton Dayton hoists yesterday.
Well, I think it is bigger than you need, although I guess
you want to be able to test screw compressors, which might be
the only thing you would be dealing in that have such big
motors.

Screw and reciprocating, yes. I used this transformer to test a Quincy
reciprocating compressor with two 10HP heads, one head at a time. I
do not think that the transformer is bigger than I need, I would
really like it to be 110 kVA.

i

Hammond, Acme, and Hevi-Duty all say a 45kVA transformer is the proper
size for a 30HP motor with frequent starting (more than once per
hour). 40HP is OK if the motor is started less than once per hour.


That's not bad. Thanks for this very useful info. Right now I have a
Quincy 75 HP screw compressor. I would love to run it.

i

Ignoramus27096 wrote:

On 2012-02-04, Jon Elson wrote:
Ignoramus31868 wrote:



As for the 45 kVA reverse wired transformer, I am using it multiple
times every day now, it works very well, I am happy. I tested five 1
ton Dayton hoists yesterday.
Well, I think it is bigger than you need, although I guess
you want to be able to test screw compressors, which might be
the only thing you would be dealing in that have such big
motors.

Screw and reciprocating, yes. I used this transformer to test a Quincy
reciprocating compressor with two 10HP heads, one head at a time. I
do not think that the transformer is bigger than I need, I would
really like it to be 110 kVA.

i
Remember that the bigger the transformer, the greater the fault current.
And, one of these days, you WILL run into some piece of gear that
does have an electrical defect. I'm pretty bold fooling with electrical
gear, but 480 with serious current behind it does scare me!

Jon

Hi.i have a simple question.i just want to.knw that can 55horse power motorr machine can run on 25kva transformer.waiting for ur answer.thanks

On 03-Jul-14 5:04 PM, wrote:
Hi.i have a simple question.i just want to.knw that can 55horse power motorr machine can run on 25kva transformer.waiting for ur answer.thanks


does this help?

http://www.dieselserviceandsupply.co...alculator.aspx

On Thu, 03 Jul 2014 02:04:17 -0700, rameezamjadqureshi wrote:

Hi.i have a simple question.i just want to.knw that can 55horse power
motorr machine can run on 25kva transformer.waiting for ur answer.thanks

Not in the normal sense, no.

One horsepower is around 750 watts (there's more than one definition of
horsepower, and I don't keep them all memorized).

The MOST electrical power that you can get from a 25kVA transformer is
25kW -- and that's if your load is perfectly resistive, which a motor
isn't.

So 55HP is a bit over 41kW, and definitely more than 41kVA.

Somewhere out there in web-land there must be at least one set of
guidelines for the size of transformer to get to match a certain size
motor -- why not do a search?

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Tim Wescott fired this volley in
:

Somewhere out there in web-land there must be at least one set of
guidelines for the size of transformer to get to match a certain size
motor -- why not do a search?


Just might be a few power conversion calculators, too.
This is another one of those people unwilling to do any research on his
own -- wants us to answer (and ostensibly be responsible for the
results).

Like that mook who comes on here periodically to ask questions like,
"Should I move my car jack handle up and down to lift my car, left-to-
right, or twist it? And if I have to twist it, which direction?"


Lloyd

"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message
. 3.70...
Tim Wescott fired this volley in
:

Somewhere out there in web-land there must be at least one set of
guidelines for the size of transformer to get to match a certain size
motor -- why not do a search?


Just might be a few power conversion calculators, too.
This is another one of those people unwilling to do any research on his
own -- wants us to answer (and ostensibly be responsible for the
results).

Like that mook who comes on here periodically to ask questions like,
"Should I move my car jack handle up and down to lift my car, left-to-
right, or twist it? And if I have to twist it, which direction?"

That would be Spawtted right? Should we

a)Answer him.
I. Give honest helpful answer
II. Give dishonest and harmful answer.

b) Ignore him.
I. Silently
II. Announce he is being ignored.

c) Be sarcastic too him.
I. Derisively.
II. Humorously.
III. Obtusely.

"Bob La Londe" fired this volley in news:lp47qi$9a4$1
@dont-email.me:

Should we

a)Answer him.
I. Give honest helpful answer
II. Give dishonest and harmful answer.

b) Ignore him.
I. Silently
II. Announce he is being ignored.

c) Be sarcastic too him.
I. Derisively.
II. Humorously.
III. Obtusely.


Just tell him where to get the information, and let him look it up
himself... which is simple:

Go find a motor power to KVA calculator, and do some thinking on your
own.

Lloyd

wrote:

Hi.i have a simple question.i just want to.knw that can 55horse power
motorr machine can run on 25kva transformer.waiting for ur answer.thanks
Obviously, you can't run the motor at full rated load from the undersized
transformer.

But, induction motors draw a very lagging power factor at light load.
Thus, their current doesn't change very much from idle to full load,
but the phase angle of the current changes dramatically. At idle, the
current is at least 75% of full rated load current, but at almost
exactly 90 degrees lagging. At full load, the current is almost
completely in phase with the voltage. That is what causes the increase
in POWER demand with increasing load.

So, under light load, the POWER demand of the motor will be fairly small,
but the current will exceed the current rating of the transformer.
Power transformers have some margin so they can deliver rated POWER
with a less than unity power factor, but they are usually capable
of only handling about 15% above rated current to account for the power
factor. Therefore, if there is a large power factor correction capacitor
bank placed across the transformer secondary, it might make it possible to
test the motor at minimal load with the 25 KVA transformer. But, you
won't be able to get more than 50% of rated power from the motor, even
WITH the phase correction capacitors.

Jon

On Thu, 03 Jul 2014 18:59:49 +0800, DTJ wrote:

On 03-Jul-14 5:04 PM, wrote:
Hi.i have a simple question.i just want to.knw that can 55horse power motorr machine can run on 25kva transformer.waiting for ur answer.thanks


does this help?

http://www.dieselserviceandsupply.co...alculator.aspx

Interesting. It takes 166.187kvA to directly run a 55hp motor.
The 26kva xfmr couldn't quite run a 7hp motor.


Good page, bookmarked!

--
You can ignore reality, but you cannot ignore
the consequences of ignoring reality.
--Ayn Rand

On Thu, 03 Jul 2014 12:30:44 -0500, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote:

Tim Wescott fired this volley in
m:

Somewhere out there in web-land there must be at least one set of
guidelines for the size of transformer to get to match a certain size
motor -- why not do a search?


Just might be a few power conversion calculators, too.
This is another one of those people unwilling to do any research on his
own -- wants us to answer (and ostensibly be responsible for the
results).

Like that mook who comes on here periodically to ask questions like,
"Should I move my car jack handle up and down to lift my car, left-to-
right, or twist it? And if I have to twist it, which direction?"

That sounds like your friend, Stryped's, question.

--
You can ignore reality, but you cannot ignore
the consequences of ignoring reality.
--Ayn Rand

On Thu, 03 Jul 2014 13:44:04 -0500, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote:

"Bob La Londe" fired this volley in news:lp47qi$9a4$1
:

Should we

a)Answer him.
I. Give honest helpful answer
II. Give dishonest and harmful answer.

b) Ignore him.
I. Silently
II. Announce he is being ignored.

c) Be sarcastic too him.
I. Derisively.
II. Humorously.
III. Obtusely.

Yoda said "This guy's GoogleFu is weak as hell, mon." (translated)


--
You can ignore reality, but you cannot ignore
the consequences of ignoring reality.
--Ayn Rand

On 7/3/2014 1:30 PM, Lloyd E. Sponenburgh wrote:
Tim Wescott fired this volley in
:

Somewhere out there in web-land there must be at least one set of
guidelines for the size of transformer to get to match a certain size
motor -- why not do a search?


Just might be a few power conversion calculators, too.
This is another one of those people unwilling to do any research on his
own -- wants us to answer (and ostensibly be responsible for the
results).

Well, in THAT case...a 25kva xformer will run THREE 55hp motors!
Especially in critical applications under heavy load.

On 7/3/2014 2:35 PM, Bob La Londe wrote:
"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message
. 3.70...
Tim Wescott fired this volley in
:

Somewhere out there in web-land there must be at least one set of
guidelines for the size of transformer to get to match a certain size
motor -- why not do a search?


Just might be a few power conversion calculators, too.
This is another one of those people unwilling to do any research on his
own -- wants us to answer (and ostensibly be responsible for the
results).

Like that mook who comes on here periodically to ask questions like,
"Should I move my car jack handle up and down to lift my car, left-to-
right, or twist it? And if I have to twist it, which direction?"

That would be Spawtted right? Should we

a)Answer him.
I. Give honest helpful answer
II. Give dishonest and harmful answer.

b) Ignore him.
I. Silently
II. Announce he is being ignored.

c) Be sarcastic too him.
I. Derisively.
II. Humorously.
III. Obtusely.





Don't forget "Nonsensical"!

Tom Gardner Mars@Tacks fired this volley in
:

Well, in THAT case...a 25kva xformer will run THREE 55hp motors!
Especially in critical applications under heavy load.


What itches in my mind about this guy is this: With his broken English and
desire to run a 55HP electric motor (which has somewhat limited uses in
residential applications), I fear he's trying to figure how to start up
some sort of factory, and he'll burn it down with all the 'thinking' he's
doing on his own.

Lloyd

On Thu, 03 Jul 2014 16:05:41 -0700, Larry Jaques
wrote:

On Thu, 03 Jul 2014 18:59:49 +0800, DTJ wrote:

On 03-Jul-14 5:04 PM, wrote:
Hi.i have a simple question.i just want to.knw that can 55horse power motorr machine can run on 25kva transformer.waiting for ur answer.thanks


does this help?

http://www.dieselserviceandsupply.co...alculator.aspx

Interesting. It takes 166.187kvA to directly run a 55hp motor.
The 26kva xfmr couldn't quite run a 7hp motor.


Good page, bookmarked!


It might..might run it..but it certainly wont start it.

Put a load on it...poof!

For that sized motor..45 KVA is a requirement


-

"[F]ar from being the Great Satan, I would say that we
are the Great Protector. We have sent men and women
from the armed forces of the United States to other parts
of the world throughout the past century to put down oppression.
We defeated Fascism. We defeated Communism.
We saved Europe in World War I and World War II.
We were willing to do it, glad to do it. We went to
Korea. We went to Vietnam. All in the interest of
preserving the rights of people.

And when all those conflicts were over, what did we
do? Did we stay and conquer? Did we say, "Okay, we
defeated Germany. Now Germany belongs to us? We defeated Japan,
so Japan belongs to us"? No. What did we do?
We built them up. We gave them democratic systems which
they have embraced totally to their soul.
And did we ask for any land? No.

The only land we ever asked for was
enough land to bury our dead."

General Colin Powell

On Fri, 04 Jul 2014 02:40:32 -0700, Gunner Asch
wrote:

On Thu, 03 Jul 2014 16:05:41 -0700, Larry Jaques
wrote:

On Thu, 03 Jul 2014 18:59:49 +0800, DTJ wrote:

On 03-Jul-14 5:04 PM, wrote:
Hi.i have a simple question.i just want to.knw that can 55horse power motorr machine can run on 25kva transformer.waiting for ur answer.thanks


does this help?

http://www.dieselserviceandsupply.co...alculator.aspx

Interesting. It takes 166.187kvA to directly run a 55hp motor.
The 26kva xfmr couldn't quite run a 7hp motor.


Good page, bookmarked!


It might..might run it..but it certainly wont start it.

Put a load on it...poof!

For that sized motor..45 KVA is a requirement

According to the bookmarked site's calc, it takes 166.187kva to run
that motor properly. Where did you get the 45kva number?

--
You can ignore reality, but you cannot ignore
the consequences of ignoring reality.
--Ayn Rand

On 7/3/2014 7:30 PM, Lloyd E. Sponenburgh wrote:
Tom Gardner Mars@Tacks fired this volley in
:

Well, in THAT case...a 25kva xformer will run THREE 55hp motors!
Especially in critical applications under heavy load.


What itches in my mind about this guy is this: With his broken English and
desire to run a 55HP electric motor (which has somewhat limited uses in
residential applications), I fear he's trying to figure how to start up
some sort of factory, and he'll burn it down with all the 'thinking' he's
doing on his own.

Lloyd


That IS a mighty big motor! Any application of that much power has
responsibilities of understanding.

On Fri, 04 Jul 2014 10:30:22 -0400, Tom Gardner Mars@Tacks wrote:

On 7/3/2014 7:30 PM, Lloyd E. Sponenburgh wrote:
Tom Gardner Mars@Tacks fired this volley in
:

Well, in THAT case...a 25kva xformer will run THREE 55hp motors!
Especially in critical applications under heavy load.


What itches in my mind about this guy is this: With his broken English and
desire to run a 55HP electric motor (which has somewhat limited uses in
residential applications), I fear he's trying to figure how to start up
some sort of factory, and he'll burn it down with all the 'thinking' he's
doing on his own.

Lloyd


That IS a mighty big motor! Any application of that much power has
responsibilities of understanding.

He should pay reparations!

--
The goal to strive for is a poor government but a rich people.

--Andrew Johnson

Larry Jaques fired this volley in
:


He should pay reparations!

Seriously,
I see this guy setting up a line-shaft factory on a motor that size. Then
8-year-old little girls get tangled up in the belts and pulleys, and the
rest of them on the 2nd and 3rd story of the building die when it burns
down because he's pulling that load over #10 wires.

Lloyd