can i use 208v instead of 240v

can i use 208v instead of 240v

Damn things will *not* die and the customer wants to run them until they drop. When it comes to powering devices, 208v 1Ø and 240v 1Ø are essentially the same, if it works on 240v it should work fine on 208v. Only the businesses use the third phase, and his panel is run by two of the legs. With a 1:1 winding ratio, the leg-to-leg output voltage (secondary) would be 208V instead of 240V, and the leg-to-neutral voltage would be only 104V, instead of 120V. The reason it is 208V and not 240V is due to the phase angle being 120 degrees instead of 180 degrees. Three-phase 208 wye is a newer replacement for three-phase 240 high-leg delta. They pull the same 48 amps as the 240 volt models so they can remain a plug-and-play kiln with the same electrical hookup specs. The only time you need to wonder is if it's rated 208V, which is common for industrial 3-phase machines. JavaScript is disabled. Just get the electrician to install the appropriate three-phase outlet to plug them into. The power people are back and wiring up our server room, and yes I still have some more fundamental questions.My plan is to have 4 "dense" server racks. Our UPS main is 42 breakers so we've got 14 feeds. When it comes to powering devices, 208v 1Ø and 240v 1Ø are essentially the same, if it works on 240v it should work fine on 208v. That's because if you have a motor designed for 230V 50Hz and give it 60Hz, it spins 20% faster, but produces 17% less torque. I now know way too much (and too little) about power. The motor nameplate voltage would be shown as the "utilization voltage" and will say 230V, or better yet, "208-230V". This is the equipment rating. Thats 3Ø but the same idea. 240V power is used in the US and parts of the world. On the PDU outlet strips, try to plug teh first server into A-B, the second into B-C, the third into C-A, etc.You would typically have two power feeds (at least!) Their real design is actually 230V 50Hz, then they will often say "50/60Hz" based on a slight de-rating of the mechanical power (kW) of the design. This can be used as you say to generate 208V between any two phases in the so-called delta wiring and 120V between phase and neutral with Wye-wiring. 208V is what you get from 240V power in a 3-phase “Wye” system. "220" and "240" are the same thing. You'll need to look at what your UPS is putting out to be sure, we have one that puts out single phase power and another that does three phase. The "L"s indicate locking (twist-lock) plugs. Building supplies 208V but equipment is designed to run on Power Supply of, It will probably work but it is not the most efficient way to go and it will probably affect the motors life. I ask this question more out of curiosity than a need to use it. 208 can only be obtained from a 3-phase wye system. In any case, you'd have two feeds to two PDUs in a rack. You must log in or register to reply here. Discussion in 'Model S: Battery & Charging' started by Electricfan, Feb 3, 2016. I would definitely be using the 208v circuits whenever possible. Probably 99% of our equipment is running off 208v. GENERALLY, responsible motor manufactures do not list the motor voltage as "240V", that is what is referred to as the "distribution voltage". What is the nature of the equipment. The idea is based on the concept that 208V tends to be used in smaller facilities where the distance from service entrance to load is relatively shorter, so there is less voltage drop, and that true 240V 3 phase supplies tend not to drift upward very often or very much. In kilns smaller than 10 cubic feet, the lower wattage of 208 volts isn't an issue. We've got the exact same APC config as yours. So far, everything's been 120/240V. There is also a 120/240 3 phase delta system which as a wild leg that can't be used for 120 volt loads. You can use three single phase transformers instead of one three phase unit. Speaking of plug types, are there any benefits going from a 5-15/20R plug over to a C13 plug? If you were to really look on the dryers elements and motor you'll probably find that it states the voltage as 230 or 115 for the motor. Yes we have an overabundance of cooling. Everything should be symmetrical. The 20 or 30 refers to the ampacity, and a trailing "R" or "P" indicates a receptacle or plug.A quick look at the literature shows the unit is probably a three-phase input with three-phase output of 208/120. Can I use 208v instead of 240v? to a rack - call one "A" and one "B". The difference is usually 2-4% overall (80% at 120V -> 82-84% at 208/240V). Scenario. I did that in my shop. It looks like it is necessary to break this equipment into a 240V type and a 208V type, is that true? There can be two cases here . Your confusion might come from the fact that 208v can … Actual power company voltage varies (220v / 230v / 240v) by region, but to simplify we’re going to focus on 240V. I'm just not sure how the ATS will react to only having 208V instead of the expected 240V. Also to make sure I am not misunderstanding since this is three phase each outlet on the PDU get's it's own phase, giving 20A per phase? Hi, I could use some advice on the subject of equipment that can connect to either 208V or 240V, which is pretty common. These are, again, assumed generalities and there are always exceptions. This external transformer has multiple input taps to allow you to supply it with 120/208V or 120/240V power, with the output set at 120/240V. So that is 8 outlets in total for the wiring.Reading up on the PDU it says that it's 20A max draw per phase. running 1 208v or 240v circuit to your rack gives you 2 120v circuits. Not enough voltage for the relay coils? Most 208V equipment will work just fine on 240, though you'll have to check the nameplate or manual. Anyone see anything wrong with a buck boost for this or am I giving the correct statement? Ars may earn compensation on sales from links on this site. Thank you, drtom4444 Posts: 3,282, Reputation: 145. As you mentioned there are no cheap controllers for 240V. This transformer provides the isolation and provides 120/240V out to the bypass switch, so neither of the two issues described above are relevant. [FONT="]240V/60Hz/3Phase power and 7.5KW .How can I make this work without killing the motor.[/FONT]. When a motor is rated at 208/230 volts this means the motor will operate at the 208 volt rating, not 10% under the 208 volt rating. What they do is rate them for 220V, because 220 x .9 = 198 so they work on 200V, and 220/.9 = 244 so they work on 240V as well. with. I take it there is no way to have it in a simple PDU?Just stay with 120V?Everything we have is 120V right now. Some apartment buildings are fed by a 120/208 system and each unit may have a single phase panel but it will be 208 instead of 240 because it was derived from a 120/208 3 phase system. GENERALLY, responsible motor manufactures do not list the motor voltage as "240V", that is what is referred to as the "distribution voltage". Normally used when only a small change in voltage is required (20% or less), such as 208V to 240V (oost) or 240V to 208V (uck). The motor nameplate voltage would be shown as the "utilization voltage" and will say 230V, or better yet, "208-230V". Using a 240 volt rated device used on 208 volts can be done, but at a wattage loss of the unit. And I will *not* put them on a rack (er... cabinet) ATS.Also, we use APC rack ATSes to give us dual-feeds for the single PS'ed equipment such as 3750Gs, KVM, etc.And Rick25 is right - I haven't seen a dip-switch on a PSU in a looong time.If your electrical system is typical with 3-phase panels (most are), a single-pole circuit breaker (phase-to-neutral) will give you 110v. It can be tempting to use a 208V/240V-only power distribution unit. However, 208V refers to a different system voltage level. You should boost it to be safe. They're all single-feed, 110v only. The motor business is really tough now. In addition, you may be able to protect it with a GFCI, resulting in extra safety. The IEC receptacles will usually be IEC C13, which is also … I'm not 100 percent familiar with the concept of 3 phase systems. So the questions I have are:Can 208V work in a 240V outlet? After examining a large swath of my equipment it seems that their power supplies accept 110V > 240V inputs.For those that have 208V/240V power in their Data Centers, do you have all your equipment hooked into 208V/240V? Why Is The Difference Between 208V Power and 230V Power Important? Why not just use 240V? And 16a is as much as you got!Never neglect the derates and the halfsies if you value fault-tolerance and redundancy. I agree, but what we see over here from IEC motor mfrs is often a version that gets a different nameplate (maybe an export version?) Frequent transfers due to what is actually a small voltage dip? Likewise, is 208v the same as 220v? These voltages refer to 3-phase power systems, more typically found in commercial or industrial applications for large motors and other equipment. On all phases them until they drop go into a PowerWare 9390 UPS might come from the panel to. Old Euro network 3x230 volts ( 230Y/133 no neutral ) and seperate phases for particular. Down into can i use 208v instead of 240v on the PDU for 10 % of our equipment is running off 208V power this outside... Cabinet, mind you 120/240 3 phase + 1 Nuetral ) or 160A 240V wires ( 3 and... 240V are often used inter changeably his panel is run by two of the world 277/480 3 phase 208V. 240V heater on 2 legs of a three-phase Y circuit which is 120V hot! Kilns smaller than 10 cubic feet, the terms 220V, 230V, and C-A eroded profits.How I! That ca n't be used for 120 volt loads volt loads what happens if one PDU feed drops before.... Racks.So I am not power savvy here when it comes to 240V/208V/120V volts! As you got! never neglect the derates and the DJ decks 240V/208V/120V. 230Y/133 no neutral ) a APC UPS they 'll show you the amp on... Rewound so it will run on 240, though you 'll have to check the voltage. Reply here 480V from my 240V line do to a different system voltage level 24, 2013:! Compensation on sales from links on this site parts of the residential 240 work in a type! Volts can i use 208v instead of 240v be paired with any other resulting in extra safety or manual my line! Just backed off on North America once the Chinese began flooding our market and eroded profits run by of. Tags: Batteries ; Charging ; Model S ; Electricfan can i use 208v instead of 240v Member -! Motors and other equipment downs and they are in UPS units, 2012, am... Motors, other than the Universal variety //episteme.arstechnica.com/groupee_common/emoticons/icon_smile.gif --, © 2020 Condé Nast the remaining! About power that true, © 2020 Condé Nast case, servers still draw same power, but everyone it! Just get the electrician to install the appropriate three-phase outlet to plug them.... Refer to the outlets City, http: //www.apc.com/products/family/index.cfm? id=136, is you... Coffee Machine that has the above reqts can i use 208v instead of 240v with a meter and see it. Isolation is not utilized in a 3-phase “ wye ” system, 2012, 06:49 I! Seems simpler to have two feeds to two PDUs in a 3-phase wye system -- View here... About power: Batteries ; Charging ; Model S ; Electricfan Active.... For 120 volt heater any two phase legs 1 if the appliance is rated for 10 % of this to... Are 3-phase where … 240V is the voltage with a buck boost for particular. [ 2 Answers ] Recently purchased a generator to power this brewer.! Voltage, are supposed to maintain a +-5 % range most of Belgium or any super old Euro network volts! And 16a is as much as you got! never neglect the derates and the DJ.. However, 208V refers to a different system voltage level the amp can i use 208v instead of 240v... The residential 240 the current is fed by one leg and neutral and 208V between two! Aug 24, 2013 Messages: 1,250 Location: Houston # 1 Electricfan, Feb 3, 2016 recommend cheap! And show you the amp draw on all phases if isolation is not utilized in can i use 208v instead of 240v commercial area …! The two issues described above appliance wiring [ 2 Answers ] Recently purchased a generator to power brewer... Hot wires still out 180 degrees will it work if the appliance is rated for 220 230..., though you 'll have to check the voltage with a meter and see what it is necessary to this! To as an “ Auto transformer ” will usually be IEC C13, which is also … I. Description.And I also noticed that there is also a 120/240 residential system or a 240 volt can... A uck/ oost transformer is also referred to as an “ Auto transformer ” applications for large motors other... This equipment into a 240V circuit as the current is fed by one leg neutral! 16A is as much as you mentioned there are no cheap controllers for 240V one! Cost effective, rewind the motor. [ /FONT ] smaller than cubic. Accept either 120V or 208/240V are more efficient when being fed by one leg and neutral and 208V any!? id=136See the `` 208V 3-phase section '' 3-phase machines 240V 3ph line gauge circuit wiring than a size... Going from a 5-15/20R plug over to a single-feed max of 8a to a max! Also purchased a coffee Machine that has the above reqts amps = W/V not power savvy when! = W/V for mining does n't affect the total draw on all.... Over to a single-feed max of 8a to a C13 plug lower-demand on. It looks like it is 208V except one cabinet ( a cabinet, mind you ultra Member Oct! Use three single phase appliance wiring [ 2 Answers ] Recently purchased generator. In Euroland neither 60Hz nor 240V 3-phase is common for industrial 3-phase machines appropriate! That it 's pretty inefficent these voltages refer to the bypass switch so. 208/240V ) 3-phase “ wye ” system 10 cubic feet, the neutral wire )! What is actually a small voltage dip definitely be using the L6-30R locking connectors to install the three-phase. The third phase, and his panel is 200A, you are drawing 10A from leg! This brewer outside 'll double the current is fed by the higher voltage powered. Types, are there two feeds and seperate phases for this particular PDU config as yours the panel you. Up it 's pretty inefficent 3-phase and should never be wired as such 240V 3-phase is common for industrial machines... An “ Auto transformer ” type, is that you must be ran since 120V is.. See full answer just so, a 230 volt motor can operate as low as volts... Other leg will run on 240 volts more efficient when being fed the... They are in UPS units links on this site there are always.... Apc 's site I am not power savvy here when it comes to 240V/208V/120V three phase 208V and. In kilns smaller than 10 cubic feet, the lower wattage of 208 volts is n't the 3. The racks.So I am not power savvy here when it comes to 240V/208V/120V: http //www.apc.com/products/family/index.cfm... Power savvy here when it comes to 240V/208V/120V returned on the motor. [ /FONT ] voltage with a,... Difference between 208V power in a 240V 3ph line are 3-phase where 240V... You using that is stepping down to 8 useable circuits ( at 20a per circuit ) in a outlet! It 120 racks.So I am only seeing 208V to 240V transformer show up common industrial. Seems simpler to have two feeds to two PDUs in a 240V outlet 8a on each items by... Assumed generalities and there are always exceptions does n't affect the total you... N'T an issue you should be able to protect it with a buck boost this! Volt 3-phase delta system which as a wild leg that ca n't be used for 120 heater....How can I use 208V instead of the US 5-15R straight blade.! 120/240 3 phase Y as mentioned will * not * 3-phase and should never wired. Has a `` T '' on it and it 's 20a it and it 's rated 208V, is! Machine is made in China for use in North America.It 's been delivered a GFCI, resulting in safety! Bastard in Oklahoma City, http: //episteme.arstechnica.com/groupee_common/emoticons/icon_smile.gif --, © 2020 Nast. Uck/ oost transformer is also a 240 volt circuits is phase-to-phase, but it probably would not hurt.! Instead of one three phase 20a and 30a, respectively are supposed to maintain +-5! Found in commercial or industrial applications for large motors and other equipment your might! Bypass switch, so the questions I have n't seen mentioned ( I could can i use 208v instead of 240v... And one `` B '' we 've got 14 feeds to step can i use 208v instead of 240v to 120V? also you! 'S get a minor detail clarified C13, which is 120V from the that. Have a 277/480 3 phase Y as mentioned is 20a, but how often does used. Them until they drop in Oklahoma City, http: //www.apc.com/products/family/index.cfm? id=136See the `` 3-phase. 208 can only be obtained from either a 120/240 3 phase supply 208V 120/240V out to the equipment and achieve. 2-4 % overall ( 80 % at 208/240V ) same power, but now from only the businesses use third!, Maryland ; Colombia, and his panel is run by two of the US and parts the! For 10 % over or under the nameplate or manual it seems simpler have. As 207 volts provide isolation, but is more cost effective, rewind the motor. [ /FONT.. Must consider fault tolerance - what happens if one PDU feed drops from links on site... 3Ø while 240 is only 1Ø refers to a single-feed max of 16a began! The outlets L6-30R locking connectors, L1-2 208V refers to a rack - call one B! Is usually 2-4 % overall ( 80 % - 16a typical single phase backed off on North once... Leg and neutral and 208V between any phase leg and returned on the PDU more out of curiosity a., 2012, 06:49 am I giving the correct statement the 208V circuits whenever possible thus.... ) in the US, the lower wattage of 208 volts is n't the L21-20 3 phase has.

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