Got a 100A 240V spur.
In UK - so 50Hz, for what it's worth.
I see rotary converters. Seen one in-real-life.
Get converter first then could get equipment with 3-phase motors...
So in your experience what's the real deal?
What power motor could I run given 100A spur?
Is that answer nuanced if not a direct-online (DOL) starter but some
sort of autotransformer starter or resistor? I was in a shop which
had a WW2 era press where you pushed the handle to a starting position
then flipped it across to the run position when you could hear the
motor at speed.
Sorry if frequently asked. I'd happily follow-up leads.
On 10/10/2022 1:21 PM, Richard Smith wrote:
Got a 100A 240V spur.
In UK - so 50Hz, for what it's worth.
I see rotary converters. Seen one in-real-life.
Get converter first then could get equipment with 3-phase motors...
So in your experience what's the real deal?
What power motor could I run given 100A spur?
Is that answer nuanced if not a direct-online (DOL) starter but some
sort of autotransformer starter or resistor? I was in a shop which
had a WW2 era press where you pushed the handle to a starting position
then flipped it across to the run position when you could hear the
motor at speed.
Sorry if frequently asked. I'd happily follow-up leads.
Have you considered a VFD ? I've no direct experience with them , but they get good reviews from those I know who have used them .
"Richard Smith" wrote in message news:lyzge34k0g.fsf@void.com...
Got a 100A 240V spur.
In UK - so 50Hz, for what it's worth.
I see rotary converters. Seen one in-real-life.
Get converter first then could get equipment with 3-phase motors...
So in your experience what's the real deal?
What power motor could I run given 100A spur?
Is that answer nuanced if not a direct-online (DOL) starter but some
sort of autotransformer starter or resistor? I was in a shop which
had a WW2 era press where you pushed the handle to a starting position
then flipped it across to the run position when you could hear the
motor at speed.
Sorry if frequently asked. I'd happily follow-up leads.
----------------------
100A, 240V is 24 Kilowatts or 32 HP, though as the PFC article below
mentions you probably can't use that much.
For the low budget, technically educated hobbyist: https://www.practicalmachinist.com/forum/threads/fitch-williams-converter-design-balancing-instructions.101882/
Fitch was highly respected in R.C.M and heavily involved in the power
systems on the International Space Station.
There are other ways to cobble a spare 3ph motor into a 3 phase rotary converter, including starting it with a pull rope.
Single phase motors may have internal centrifugal Start-Run switches
that click back to Start as they slow down after switching them off. If
the Start circuit fails they just hum loudly without turning. My father
had a bench grinder like that, switch it on while yanking the belt to
get it turning, and try to avoid catching a finger in the pulley. The
belt was so loose that damage to the finger wasn't serious. I appreciate solid modern technology but I can deal with primitive, at my first
factory job the machinery ran on leather belts from overhead line shafts.
In my opinion unless you are familiar with and equipped to troubleshoot
AC power, buy a solution from a company whose technical skills you
trust. You might ask about Power Factor Correction and see if the
salesman refers you to a tech who can explain it, or tries to blow you off.
https://energyace.co.uk/2019/01/18/what-is-power-factor-correction-and-how-does-it-work-uk/
BTW my house was built for electric heat and wired for 240V, 200A,
plenty for any machine tools and welders I could stuff into it. I've
been exploring energy conservation and reduced my electricity demand
from 4 to 2 KWH per day.
On 10/10/2022 3:56 PM, Jim Wilkins wrote:
"Richard Smith" wrote in message news:lyzge34k0g.fsf@void.com...
Got a 100A 240V spur.
In UK - so 50Hz, for what it's worth.
I see rotary converters. Seen one in-real-life.
Get converter first then could get equipment with 3-phase motors...
So in your experience what's the real deal?
What power motor could I run given 100A spur?
Is that answer nuanced if not a direct-online (DOL) starter but some
sort of autotransformer starter or resistor? I was in a shop which
had a WW2 era press where you pushed the handle to a starting position
then flipped it across to the run position when you could hear the
motor at speed.
Sorry if frequently asked. I'd happily follow-up leads.
----------------------
100A, 240V is 24 Kilowatts or 32 HP, though as the PFC article below
mentions you probably can't use that much.
For the low budget, technically educated hobbyist:
https://www.practicalmachinist.com/forum/threads/fitch-williams-converter-design-balancing-instructions.101882/
Fitch was highly respected in R.C.M and heavily involved in the
power systems on the International Space Station.
There are other ways to cobble a spare 3ph motor into a 3 phase
rotary converter, including starting it with a pull rope.
Single phase motors may have internal centrifugal Start-Run switches
that click back to Start as they slow down after switching them
off. If the Start circuit fails they just hum loudly without
turning. My father had a bench grinder like that, switch it on while
yanking the belt to get it turning, and try to avoid catching a
finger in the pulley. The belt was so loose that damage to the
finger wasn't serious. I appreciate solid modern technology but I
can deal with primitive, at my first factory job the machinery ran
on leather belts from overhead line shafts.
In my opinion unless you are familiar with and equipped to
troubleshoot AC power, buy a solution from a company whose technical
skills you trust. You might ask about Power Factor Correction and
see if the salesman refers you to a tech who can explain it, or
tries to blow you off.
https://energyace.co.uk/2019/01/18/what-is-power-factor-correction-and-how-does-it-work-uk/
BTW my house was built for electric heat and wired for 240V, 200A,
plenty for any machine tools and welders I could stuff into it. I've
been exploring energy conservation and reduced my electricity demand
from 4 to 2 KWH per day.
OOPS!!!
I saw 100A and thought 100HP. My bad. Biggest motor on circuit might
be 16-20HP. Not 50-60. LOL. Again. My bad.
--
Bob La Londe
CNC Molds N Stuff
--
This email has been checked for viruses by AVG antivirus software. www.avg.com
I *should* learn electrics and electronics as a project - but it must
be a free-standing project.
I have worked so hard on welding - maybe I should continue to do that
and graciously accept help when needed and given...
Got a 100A 240V spur.
In UK - so 50Hz, for what it's worth.
I see rotary converters. Seen one in-real-life.
Get converter first then could get equipment with 3-phase motors...
So in your experience what's the real deal?
What power motor could I run given 100A spur?
Is that answer nuanced if not a direct-online (DOL) starter but some
sort of autotransformer starter or resistor? I was in a shop which
had a WW2 era press where you pushed the handle to a starting position
then flipped it across to the run position when you could hear the
motor at speed.
Sorry if frequently asked. I'd happily follow-up leads.
Got a 100A 240V spur.
In UK - so 50Hz, for what it's worth.
I see rotary converters. Seen one in-real-life.
Get converter first then could get equipment with 3-phase motors...
So in your experience what's the real deal?
What power motor could I run given 100A spur?
Is that answer nuanced if not a direct-online (DOL) starter but some
sort of autotransformer starter or resistor? I was in a shop which
had a WW2 era press where you pushed the handle to a starting position
then flipped it across to the run position when you could hear the
motor at speed.
Sorry if frequently asked. I'd happily follow-up leads.
"Hul Tytus" wrote in message news:ti4o1i$mlu$1@reader2.panix.com...
What's a spur?
I took the railway/railroad meaning of 'spur'.
You're lucky he's British instead of Australian.
"Once a jolly swagman camped by a billabong
Under the shade of a Coolibah tree
And he sang as he watched and waited till his billy boiled
"You'll come a Waltzing Matilda with me"
Down came a jumbuck to drink at that billabong
Up jumped the swagging and grabbed him with glee
And he sang as he stowed that jumbuck in his tucker bag
"You'll come a Waltzing Matilda with me"
Down came the squatter mounted on his thorough-bred
Up came the troopers one, two, three
"Whose that jolly jumbuck you've got in your tucker bag?
You'll come a Waltzing Matilda with me"
Up cut the swagging and jumped into the billabong
"You'll never catch me alive" said he
And his ghost may be heard if you pass by that billabong
"Who'll come a Waltzing Matilda with me?"
"Richard Smith" wrote in message news:lysfju8dbl.fsf@void.com...
I *should* learn electrics and electronics as a project - but it must
be a free-standing project.
I have worked so hard on welding - maybe I should continue to do that
and graciously accept help when needed and given...
---------------------------
After day and night college courses, Army training and a career in it
I'm nowhere near being able to consider myself an electrical engineer,
though I'm pretty good in some of the scattered areas where I've
worked. As with mechanical engineering the calculus becomes intense in
some areas, more than I had to survive in Chemistry. The Army
training, which to be fair was on very arcane equipment, began with
around 100 in the class, of which 4 of us graduated. I learned the art
and craft of building electronic hardware mostly on the job and from examining high end industrial and military equipment.
A good start would be learning Volts, Amps and Watts, resistors,
capacitors and inductors (since you use welders), transformers, relays
and motors. Digital electronics is an extensively complex assembly of
simple building blocks and you don't have to dive too deep into its
innards to be able to tame and train a microcomputer, an Arduino for
example. Analog electronics, transistors etc, is being swallowed up by Digital.
What's a spur?
Hul
What's a spur?
Hul
Hul Tytus <ht@panix.com> writes:
What's a spur?
Hul
In general (?) (well, in UK), lights are on rings and sockets are on
rings. Multiple places to draw current off one supply from the breaker.
A spur is when a cable goes direct out of the distribution-board to a
single destination.
The cooker has one always (?) because of its high power draw.
Outbuildings often have a spur, as in this case.
I *should* learn electrics and electronics as a project - but it must
be a free-standing project.
I have worked so hard on welding - maybe I should continue to do that
and graciously accept help when needed and given...
I *should* learn electrics and electronics as a project - but it must
be a free-standing project.
I have worked so hard on welding - maybe I should continue to do that
and graciously accept help when needed and given...
Got a 100A 240V spur.
In UK - so 50Hz, for what it's worth.
I see rotary converters. Seen one in-real-life.
Get converter first then could get equipment with 3-phase motors...
So in your experience what's the real deal?
What power motor could I run given 100A spur?
Is that answer nuanced if not a direct-online (DOL) starter but some
sort of autotransformer starter or resistor? I was in a shop which
had a WW2 era press where you pushed the handle to a starting position
then flipped it across to the run position when you could hear the
motor at speed.
Sorry if frequently asked. I'd happily follow-up leads.
Get a phase converter with a 10 HP idler motor -- you will be golden
i
On 2022-10-10, Richard Smith <null@void.com> wrote:
Got a 100A 240V spur.
In UK - so 50Hz, for what it's worth.
I see rotary converters. Seen one in-real-life.
Get converter first then could get equipment with 3-phase motors...
So in your experience what's the real deal?
What power motor could I run given 100A spur?
Is that answer nuanced if not a direct-online (DOL) starter but some
sort of autotransformer starter or resistor? I was in a shop which
had a WW2 era press where you pushed the handle to a starting position
then flipped it across to the run position when you could hear the
motor at speed.
Sorry if frequently asked. I'd happily follow-up leads.
Get a phase converter with a 10 HP idler motor -- you will be golden
i
On 2022-10-10, Richard Smith <null@void.com> wrote:
...
Ignoramus3431877 <ignoramus3431877@NOSPAM.3431877.invalid> writes:
Get a phase converter with a 10 HP idler motor -- you will be goldenThat's right - good to see you again Iggy
i
On 2022-10-10, Richard Smith <null@void.com> wrote:
...
Some online advice with phase converters leads to
7.5HP idler -> 5.5HP max motor
You say - 10HP idler...
Does the idler help with motor starts?
Eg. if I got an ex-industrial compressor with 3-phase motor, would the
idler prevent whatever causes the maximum single-phase motor power to
be 3HP apply?
Sorry to be so clueless on this subject.
Thanks Dave for telling me the real deal as you experience it on UK
supply.
Digression from "phase converter" but on theme of what can be done
with what with domestic supply...
The problem with compressor plugging into "domestic" supply is moving
it about.
With the currently maybe fanciful idea of getting a boat - steel -
where needle-descaler and "autobody-sized" gritblast gun for running
paint repair.
For down by the water, maybe best stay at 13A for the power you can
blag. So you have 7 c.f.m. at 90 p.s.i. of compressed air.
Gets you the spot repairs done(?)
I'll post a nautical one which is right off this topic - recent
experience.
Rich S
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