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What's the largest Main Breaker available?
Most homes have a 100A to 200A main breaker. Industrial buildings and
farms often have a 300A or 400A main. Factories with lots of electrical machinery have multiple main panels, (often 3 phase), but what is the largest main breaker that is sold? |
What's the largest Main Breaker available?
On Tue, 03 Apr 2012 13:21:52 -0500, wrote:
Most homes have a 100A to 200A main breaker. Industrial buildings and farms often have a 300A or 400A main. Factories with lots of electrical machinery have multiple main panels, (often 3 phase), but what is the largest main breaker that is sold? 3000A maybe http://www.electriccontrol.com/westinghouse.cfm |
What's the largest Main Breaker available?
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What's the largest Main Breaker available?
On Tue, 03 Apr 2012 22:30:21 -0400, Ed Pawlowski wrote:
On Tue, 03 Apr 2012 13:21:52 -0500, wrote: Most homes have a 100A to 200A main breaker. Industrial buildings and farms often have a 300A or 400A main. Factories with lots of electrical machinery have multiple main panels, (often 3 phase), but what is the largest main breaker that is sold? We have a 1200A in or plant, but I know they do make a 4000A. I don't know the biggest for sure though. Geezzzzzz as if that aint enough power!!!! I'd hate to have to pay that electric bill. And imagine the size of that transformer feeding it. The biggest listed on that Westinghouse site was 4000 (for low voltage, meaning 240/120 or three phase 208. I know some buildings have 440 too, I'm not sure just why, I suppose some motors run on 440, or they split it into two 220/240 circuits like they do with 240 to 120. |
What's the largest Main Breaker available?
On Apr 3, 7:21*pm, wrote:
Most homes have a 100A to 200A main breaker. *Industrial buildings and farms often have a 300A or 400A main. *Factories with lots of electrical machinery have multiple main panels, (often 3 phase), but what is the largest main breaker that is sold? In America http://images.uk.ask.com/fr?q=air+bl...tart%253D0&qt= |
What's the largest Main Breaker available?
On Apr 3, 7:21*pm, wrote:
Most homes have a 100A to 200A main breaker. *Industrial buildings and farms often have a 300A or 400A main. *Factories with lots of electrical machinery have multiple main panels, (often 3 phase), but what is the largest main breaker that is sold? Seen operating here. http://www.youtube.com/watch?v=NfSYQRorDgM |
What's the largest Main Breaker available?
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What's the largest Main Breaker available?
On 4/4/2012 4:55 AM, Ed Pawlowski wrote:
On Tue, 03 Apr 2012 22:07:50 -0500, wrote: We have a 1200A in or plant, but I know they do make a 4000A. I don't know the biggest for sure though. Geezzzzzz as if that aint enough power!!!! I'd hate to have to pay that electric bill. ... All of our machines run on 440V 3ph. Keeps the wire size down. I live it when a visitor says "wow, this is a big place, you must make tons of money". They go into shock when I tell them the electric bill last month was $30,000, the gas bill was $20,000 but goes up when we turn the heat on. Take a look at Alcoa and be thankful for small favors that it's that small... :) 2010 _purchased_ electricity consumption was 55,883,973 MWhr; total corporate direct energy consumption was 278,437,149 MWhr -- |
What's the largest Main Breaker available?
On 4/4/2012 9:20 AM, dpb wrote:
On 4/4/2012 4:55 AM, Ed Pawlowski wrote: On Tue, 03 Apr 2012 22:07:50 -0500, wrote: We have a 1200A in or plant, but I know they do make a 4000A. I don't know the biggest for sure though. Geezzzzzz as if that aint enough power!!!! I'd hate to have to pay that electric bill. ... All of our machines run on 440V 3ph. Keeps the wire size down. I live it when a visitor says "wow, this is a big place, you must make tons of money". They go into shock when I tell them the electric bill last month was $30,000, the gas bill was $20,000 but goes up when we turn the heat on. Take a look at Alcoa and be thankful for small favors that it's that small... :) 2010 _purchased_ electricity consumption was 55,883,973 MWhr; total corporate direct energy consumption was 278,437,149 MWhr -- I read that Iceland, being a cheap source of energy because of geothermal, was attracting aluminium plants which require massive amounts of electricity... |
What's the largest Main Breaker available?
On Apr 4, 6:30*am, Duesenberg wrote:
On 4/4/2012 9:20 AM, dpb wrote: On 4/4/2012 4:55 AM, Ed Pawlowski wrote: On Tue, 03 Apr 2012 22:07:50 -0500, wrote: We have a 1200A in or plant, but I know they do make a 4000A. I don't know the biggest for sure though. Geezzzzzz as if that aint enough power!!!! I'd hate to have to pay that electric bill. ... All of our machines run on 440V 3ph. Keeps the wire size down. I live it when a visitor says "wow, this is a big place, you must make tons of money". They go into shock when I tell them the electric bill last month was $30,000, the gas bill was $20,000 but goes up when we turn the heat on. Take a look at Alcoa and be thankful for small favors that it's that small... :) 2010 _purchased_ electricity consumption was 55,883,973 MWhr; total corporate direct energy consumption was 278,437,149 MWhr -- * I read that Iceland, being a cheap source of energy because of geothermal, was attracting aluminium plants which require massive amounts of electricity... Once on a visit to Alcoa aluminum plant I saw a weird long shaped structure on the manufacturing floor, approx 20 feet long, 6 inch by 18 inch cross section. It was tapered at one end. As I stared at it, my escort-guide told me that that item was a 'breaker' used on high tension power lines, and a utility company had just blown one and needed this replacement !!!! Any guess as to its current rating? Hate to be UNDER that when it went off! |
What's the largest Main Breaker available?
On Apr 4, 10:20*am, Robert Macy wrote:
On Apr 4, 6:30*am, Duesenberg wrote: On 4/4/2012 9:20 AM, dpb wrote: On 4/4/2012 4:55 AM, Ed Pawlowski wrote: On Tue, 03 Apr 2012 22:07:50 -0500, wrote: We have a 1200A in or plant, but I know they do make a 4000A. I don't know the biggest for sure though. Geezzzzzz as if that aint enough power!!!! I'd hate to have to pay that electric bill. ... All of our machines run on 440V 3ph. Keeps the wire size down. I live it when a visitor says "wow, this is a big place, you must make tons of money". They go into shock when I tell them the electric bill last month was $30,000, the gas bill was $20,000 but goes up when we turn the heat on. Take a look at Alcoa and be thankful for small favors that it's that small... :) 2010 _purchased_ electricity consumption was 55,883,973 MWhr; total corporate direct energy consumption was 278,437,149 MWhr -- * I read that Iceland, being a cheap source of energy because of geothermal, was attracting aluminium plants which require massive amounts of electricity... Once on a visit to Alcoa aluminum plant I saw a weird long shaped structure on the manufacturing floor, approx 20 feet long, 6 inch by 18 inch cross section. It was tapered at one end. As I stared at it, my escort-guide told me that that item was a 'breaker' used on high tension power lines, and a utility company had just blown one and needed this replacement !!!! *Any guess as to its current rating? Hate to be UNDER that when it went off! I used to repair machines at westinghouse Beaver PA that made switch gear of all sizes it was a fascinating place. They offered me a job but I declined, just a few years later everyone with less than 20 years experience lost their jobs in layoffs. Later 2/3rds of the plant was demolished, just the slab showing where the old deparments remains today... |
What's the largest Main Breaker available?
"Duesenberg" wrote in message ... On 4/4/2012 9:20 AM, dpb wrote: On 4/4/2012 4:55 AM, Ed Pawlowski wrote: On Tue, 03 Apr 2012 22:07:50 -0500, wrote: We have a 1200A in or plant, but I know they do make a 4000A. I don't know the biggest for sure though. Geezzzzzz as if that aint enough power!!!! I'd hate to have to pay that electric bill. ... All of our machines run on 440V 3ph. Keeps the wire size down. I live it when a visitor says "wow, this is a big place, you must make tons of money". They go into shock when I tell them the electric bill last month was $30,000, the gas bill was $20,000 but goes up when we turn the heat on. Take a look at Alcoa and be thankful for small favors that it's that small... :) 2010 _purchased_ electricity consumption was 55,883,973 MWhr; total corporate direct energy consumption was 278,437,149 MWhr -- I read that Iceland, being a cheap source of energy because of geothermal, was attracting aluminium plants which require massive amounts of electricity... A nickname for aluminum is "solidified electricity" thanks to the Hall-Heroult Process which takes place in an electric furnace. Tomsic |
What's the largest Main Breaker available?
In article , tangerine3
@toyotamail.com says... Most homes have a 100A to 200A main breaker. Industrial buildings and farms often have a 300A or 400A main. Factories with lots of electrical machinery have multiple main panels, (often 3 phase), but what is the largest main breaker that is sold? For the the power company's high voltage electric lines, it is called a "Recloser". Also when the voltage increases, the amperage decreases, so these are not rated at very high amperages, but are rated for high voltages... http://en.wikipedia.org/wiki/Recloser http://power.indiabizclub.com/catalo...ecloser~madras |
What's the largest Main Breaker available?
On Wed, 04 Apr 2012 08:13:53 -0500, Steve Barker
wrote: On 4/4/2012 4:55 AM, Ed Pawlowski wrote: On Tue, 03 Apr 2012 22:07:50 -0500, wrote: We have a 1200A in or plant, but I know they do make a 4000A. I don't know the biggest for sure though. Geezzzzzz as if that aint enough power!!!! I'd hate to have to pay that electric bill. And imagine the size of that transformer feeding it. The biggest listed on that Westinghouse site was 4000 (for low voltage, meaning 240/120 or three phase 208. I know some buildings have 440 too, I'm not sure just why, I suppose some motors run on 440, or they split it into two 220/240 circuits like they do with 240 to 120. All of our machines run on 440V 3ph. Keeps the wire size down. I live it when a visitor says "wow, this is a big place, you must make tons of money". They go into shock when I tell them the electric bill last month was $30,000, the gas bill was $20,000 but goes up when we turn the heat on. Ed, what is the nature of this place you refer to? Just curious. Molded foam plastics. The machines have motors driving hydraulic pumps and run from 5 hp to 15 hp. Air compressors are 75 hp and 150 hp. Miscellaneous blowers, fans, pumps cooling towers, etc. |
What's the largest Main Breaker available?
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What's the largest Main Breaker available?
On 4/3/2012 11:48 PM, wrote:
On Tue, 03 Apr 2012 22:07:50 -0500, wrote: On Tue, 03 Apr 2012 22:30:21 -0400, Ed wrote: On Tue, 03 Apr 2012 13:21:52 -0500, wrote: Most homes have a 100A to 200A main breaker. Industrial buildings and farms often have a 300A or 400A main. Factories with lots of electrical machinery have multiple main panels, (often 3 phase), but what is the largest main breaker that is sold? We have a 1200A in or plant, but I know they do make a 4000A. I don't know the biggest for sure though. Geezzzzzz as if that aint enough power!!!! I'd hate to have to pay that electric bill. And imagine the size of that transformer feeding it. The biggest listed on that Westinghouse site was 4000 (for low voltage, meaning 240/120 or three phase 208. I know some buildings have 440 too, I'm not sure just why, I suppose some motors run on 440, or they split it into two 220/240 circuits like they do with 240 to 120. 480 generally comes in as wye 3 phase. They use the resulting 277v line to neutral for lighting They will have transformers to drop that to 208 3 phase, centertapped for the 120. Likely you mean the common point of the "Y" not centertap? |
What's the largest Main Breaker available?
On Apr 4, 10:43*pm, wrote:
On Tue, 03 Apr 2012 23:48:53 -0400, wrote: Geezzzzzz as if that aint enough power!!!! *I'd hate to have to pay that electric bill. *And imagine the size of that transformer feeding it. The biggest listed on that Westinghouse site was 4000 (for low voltage, meaning 240/120 or three phase 208. *I know some buildings have 440 too, I'm not sure just why, I suppose some motors run on 440, or they split it into two 220/240 circuits like they do with 240 to 120. 480 generally comes in as wye 3 phase. They use the resulting 277v line to neutral for lighting They will have transformers to drop that to 208 3 phase, centertapped for the 120. But a centertap on 208 would only result in 104. *Or are the centertaps not exactly centered, and only using the higher voltage half (120 + 88 volts)? As much wiring as I've done, I have never understood how the 3 phase systems get the desired voltages. *Just like how does one get 277v from 480v (half is 240). *Then too, why use 277v for lighting? *Unlike large motors and electrical heating sources which are more efficient at higher voltages, lighting is one thing that surely does not need higher voltages and would require special bulbs, ballasts, and probably switches too. *Seems sort of pointless.... To better understand 3 phase, use a phaser diagram. Draw a circle and from the center outwards draw three lines to the circle's edge each line is 120 degrees apart. Now you have a circle with what kindof looks like a peace symbol. Each line represents a phase of AC power. Now spin the wheel [mentally] at 60 Hz and view from the circle's edge watching the TIP of each line go by. As a function of time, each line will subtend a sinusoidal waveform. Each waveform is what the 3 phase poer is doing. Now you can strt to play gaimes. What would be the voltage if the three wires were connected between each line tip? What would be the voltage if you measured from the tip to the center? etc etc. You will notice that no matter which connection you make the waveforms will always be 120 degrees apart. |
What's the largest Main Breaker available?
On Thu, 05 Apr 2012 00:43:31 -0500, wrote:
On Tue, 03 Apr 2012 23:48:53 -0400, wrote: Geezzzzzz as if that aint enough power!!!! I'd hate to have to pay that electric bill. And imagine the size of that transformer feeding it. The biggest listed on that Westinghouse site was 4000 (for low voltage, meaning 240/120 or three phase 208. I know some buildings have 440 too, I'm not sure just why, I suppose some motors run on 440, or they split it into two 220/240 circuits like they do with 240 to 120. 480 generally comes in as wye 3 phase. They use the resulting 277v line to neutral for lighting They will have transformers to drop that to 208 3 phase, centertapped for the 120. But a centertap on 208 would only result in 104. Or are the centertaps not exactly centered, and only using the higher voltage half (120 + 88 volts)? The centertap is 120. It is the centertap of a 3 phase Y transformer. 208/sqr3=120. The center tap of a single phase transformer is half the voltage. 240/2=120. As much wiring as I've done, I have never understood how the 3 phase systems get the desired voltages. Just like how does one get 277v from 480v (half is 240). Then too, why use 277v for lighting? Unlike large motors and electrical heating sources which are more efficient at higher voltages, lighting is one thing that surely does not need higher voltages and would require special bulbs, ballasts, and probably switches too. Seems sort of pointless.... 480/sqr3=277 It is not a center tap of a single phase like 240/120 Higher voltage means less amps for the same amount of power. With less amps you can use smaller wire and smaller raceways. Since they use it in most large buildings you can bet it is not pointless. |
What's the largest Main Breaker available?
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What's the largest Main Breaker available?
On 4/4/2012 5:55 AM, Ed Pawlowski wrote:
On Tue, 03 Apr 2012 22:07:50 -0500, wrote: We have a 1200A in or plant, but I know they do make a 4000A. I don't know the biggest for sure though. Geezzzzzz as if that aint enough power!!!! I'd hate to have to pay that electric bill. And imagine the size of that transformer feeding it. The biggest listed on that Westinghouse site was 4000 (for low voltage, meaning 240/120 or three phase 208. I know some buildings have 440 too, I'm not sure just why, I suppose some motors run on 440, or they split it into two 220/240 circuits like they do with 240 to 120. All of our machines run on 440V 3ph. Keeps the wire size down. I live it when a visitor says "wow, this is a big place, you must make tons of money". They go into shock when I tell them the electric bill last month was $30,000, the gas bill was $20,000 but goes up when we turn the heat on. Problem is that the pirate mega banks and brokerages etc give everyone the idea that all businesses are making a fortune or are evil or corrupt. |
What's the largest Main Breaker available?
On Apr 4, 5:55*am, Ed Pawlowski wrote:
On Tue, 03 Apr 2012 22:07:50 -0500, wrote: We have a 1200A in or plant, but I *know they do make a 4000A. *I don't know the biggest for sure though. Geezzzzzz as if that aint enough power!!!! *I'd hate to have to pay that electric bill. *And imagine the size of that transformer feeding it. The biggest listed on that Westinghouse site was 4000 (for low voltage, meaning 240/120 or three phase 208. *I know some buildings have 440 too, I'm not sure just why, I suppose some motors run on 440, or they split it into two 220/240 circuits like they do with 240 to 120. All of our machines run on 440V 3ph. *Keeps the wire size down. I live it when a visitor says "wow, this is a big place, you must make tons of money". *They go into shock when I tell them the electric bill last month was $30,000, the gas bill was $20,000 but goes up when we turn the heat on. Similar story... We rent a local armory for a kid's related sporting event a couple of times a year, always during the winter months. Everyone assumes that the local businessman that bought the armory was rolling in dough. "What a great deal he got! He bought this old building for $1,000 and now rents it out for concerts and events. He must be making boat loads of money." They change their tune when we tell them that the owner spent 1 million dollars on the roof as soon as he bought it to stop the leaks that prevented any other repairs from being done. Then he upgraded the electric to handle the requirements of the events he planned to hold, installed a fire protection/sprinkler system before the city would let them open, etc. Even with the favorable code treatment the city gave him so that he could start to recoup his money, it's been years and he's still in the hole. Because we're a non-profit, he rents the armory to us for a few thousand for the weekend, even though it costs him $1,200 a day to heat the place. BTW...the owner is blind and has never seen the building he owns and operates. Rumor has it that he was told that if had been able to see the building, he never would have bought it. He supposedly wanted to be bring the building back to its former glory days after years of neglect. |
What's the largest Main Breaker available?
On Apr 5, 6:43*am, wrote:
On Tue, 03 Apr 2012 23:48:53 -0400, wrote: Geezzzzzz as if that aint enough power!!!! *I'd hate to have to pay that electric bill. *And imagine the size of that transformer feeding it. The biggest listed on that Westinghouse site was 4000 (for low voltage, meaning 240/120 or three phase 208. *I know some buildings have 440 too, I'm not sure just why, I suppose some motors run on 440, or they split it into two 220/240 circuits like they do with 240 to 120. 480 generally comes in as wye 3 phase. They use the resulting 277v line to neutral for lighting They will have transformers to drop that to 208 3 phase, centertapped for the 120. But a centertap on 208 would only result in 104. *Or are the centertaps not exactly centered, and only using the higher voltage half (120 + 88 volts)? As much wiring as I've done, I have never understood how the 3 phase systems get the desired voltages. *Just like how does one get 277v from 480v (half is 240). *Then too, why use 277v for lighting? *Unlike large motors and electrical heating sources which are more efficient at higher voltages, lighting is one thing that surely does not need higher voltages and would require special bulbs, ballasts, and probably switches too. *Seems sort of pointless.... You have to understand that the 277volts is a sort of average. If you took an instant in time, because it is AC the three phases are not at the same voltage. They can be at anything from plus 360v to minus 360v. So you can't just add them together. The reason is the voltage has direction as well as size and they are 120 degrees apart. One way to grasp it is to consider. If you went four miles North from your house and then went three miles West, how far would you be from your house? Answer is not seven miles but five miles. These are vectors because they have direction as well as distance and both have to be considered if you want to add them up, (Or do anything else) The voltages in a three phase sytsem are excatly the same. They are vectors. You have to take into account the angle between themas well as their size. |
What's the largest Main Breaker available?
On Thu, 5 Apr 2012 09:33:24 -0700 (PDT), DerbyDad03
wrote: Because we're a non-profit, he rents the armory to us for a few thousand for the weekend, even though it costs him $1,200 a day to heat the place. BTW...the owner is blind and has never seen the building he owns and operates. Rumor has it that he was told that if had been able to see the building, he never would have bought it. Very generous of the owner. When we first bought this building, one section was used as warehouse from the old plant. Two people would bring material over first thing in the AM. turn all the lights on and leave them on all day; 9 to 10 hours and went back to the other building. A couple of bulbs burned out so the shipper asked me to get a couple of new bulbs. She handed me a bulb and it was 1,000 watts. Electric at the time was 15¢ a kW. Not only was the bulb $110 to replace, it costs $36+ a day to light an empty building with 30 fixtures. Once explained, they turned on only a couple of needed lights and the overhead was less. We since replaced those 1000 watt fixtures with 200 watt fluorescent. |
What's the largest Main Breaker available?
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