In this case the motor is overvoltaged by ~ +4% and that's fine. If heaters (Warren) are rated for 208V, why would a 240V system not work? Can the motor be re-wired to opperate from 240V 3ph; 11-24-2007, 12:55 AM #2. mxtras. Thank you, drtom4444 Posts: 3,282 ... when you try to run a 240 volt motor on 208 volts you are more likely to have problems if the source is around 200 volts, as it is much of the time with a lot of loads on the transformer. 220 is an archaic term left over from way back in the day. Even if it's not, any 240V-rated heater can be run on 208 at reduced power. share | improve this question | follow | edited Jun 5 '14 at 10:08. Most of my machines are single phase machines. A 230 volt motor running on 208 volts will run a slightly higher amp draw. 208V 3ph machine on 240V 3ph? If your phase converter is actually putting out 220V you should be fine, but I suspect if your power is anything like mine, you will be closer to 240V. The IEC receptacles will usually be IEC C13, which is also what is used on most servers (in the matching C14 plug). As you mentioned there are no cheap controllers for 240V. The solution is to strictly follow the design guide. Helping a buddy try to avoid a $1000 mistake. I am not clear on what you are asking. If a panel is rated 208V-- which would be unusual then you cannot serve it with a 240V line. Those who know binary, and those who don't. Running machines on 208v? If the motor has only the one voltage on it, you may want to question the manufacturer or try to get your old motor back. What's this about a transformer? These will normally have IEC connectors for the input and output instead of the US 5-15R straight blade receptacles. 3 Replies 4 Participants Last post: micromind Sep 15, 2009. I will be moving my shop soon and the shop Im going to has three phase power and 208 single phase. 1) There is no such thing as 220/240. This doesn't mean the voltage at the receptacle is 250V though. Many manufacturers sell both options. Can you run a 240V clothes dryer on a 208V 3-phase connection? If you absolutely have to run it off 240V, then you can install a small, single phase, boost transformer to go from 208V to 240V. Are the 2 hot wires still out 180 degrees, or is it 120? Sometimes the nameplate will state 208-240v as acceptable voltage ranges. RE: Can 208V 3 phase run 220V 3 phase machine itsmoked (Electrical) 9 Jan 09 16:06 Taking a 230/240 volt system and running it on 208 could easily cause the issues you are seeing. I’d like to point out that you are asking 2 possible questions: Is the system you outlined, a) a 230V motor on a 240V supply? Discuss please. Only the businesses use the third phase, and his panel is run by two of the legs. Here is where I get confused. You may have some grounding issues. What are you asking. Does it say 208-240V or just 208V? asked Jun 22 '12 at 14:22. In your breaker panel, you can install a breaker which grabs voltage from each bus, and you wire a standard 240V device - like a dryer or AC unit, etc.,. As stated earlier, the power that goes in must match that power that comes out without creating anything new. If you want a simple understanding but aren’t electrically minded, start with a simple analogy you can build on. I'm not 100 percent familiar with the concept of 3 phase systems. Most of the time you see 208 volts on 3 phase and 230-240 on single phase. You seem to have your voltages all confused. Like; Save; bus_driver. Would a shared neutral cause problems (ie, addition of outgoing current) in the neutral wire? Radar. Devices can run on a wide range of voltages, and often the higher voltage is better.. as it lowers the ampacity. If so I would assume it is wrong and should be corrected. About the Driver Shown in the Photo Above Join the discussion. For example, 120v-277v will operate on any voltage between 120v and 240v. If it says 208-240V you could have it wired to the service panel if the panel rating is big enough to handle it. 124k 67 67 gold badges 288 288 silver badges 561 561 bronze badges. Second, stepping 208V up to 240V is not tidy. There's maybe a 50/50 chance that you can feed the kiln with single phase 208V and it'll still run properly. Therefore, the 208V elements will likely fail on 240V and that failure may be spectacular (very dangerous). However, a 208V-only heater on 240V will run at 33% higher power and this could cause overheating. I would wire it up and put an amp probe on it, if the current draw is within reason, you should be fine. Many manufacturers sell both options. 208V is part (two hot wires) of a three phase grounded wye system. 2)There is no such thing as 3Ø 110/208 3) There is no 220 in the US. Residential power in the US will be 220-240 between the phase legs in your panel. There is no distinction on those IEC connectors for 120V vs. 208V/240V. Industrial installations usually have a 480 volt feed from the power company and the facility then has a step down transformer that delivers 120 volts for offices etc and 2777 for lighting. (208V). Reply. I like the bicycle analogy. or total watts the element needs to be, I may be able to recommend a cheap big box home center solution. 213 1 1 gold badge 3 3 silver badges 6 6 bronze badges. If they are dual rated it shouldn't matter on the supply voltage. The output of the UPS is unbalanced, meaning that from hot to hot you will see 208 volts (or 240v if so configured), however it is not two balanced 120 volt legs as you would traditionally see from 208v/240v utility power. Hi Kammy, First, let's get a minor detail clarified. Thanks for any ideas. This limits starting capability. Keep the actual motor load down to 80% - 90% of rated output and you should be OK (I'm figuring 208V is about a 10% reduction from 230V). 12,412 Posts #8 • Dec 15, 2014. power said: I have ran into the same issue with one of our welders. 1 - 4 of 4 Posts. The problem with using the 208V oven on a 240V circuit is that the heating element can draw too much current and overheat. Can you use a 208V 3ph rated commercial dryer on a 240v 3ph line? There are 10 types of people. Reactions: Chipper5783. Bicycle Analogy . As UK used to be 240 but dropped to 230 to match with France, France and all EU moved from 220 to 230 for same reason. It will operate assuming you have a 120/208V 3 phase system, but it will not get as hot as it would on a 240V system. I HIGHLY doubt you should have a 208v service to a residence. Canada/USA run at 60hz frequency.. it's incompatible. 13 years ago. But devices will fry if you run them at the wrong frequency. I just googled and some parts of China have 220VAC @ 50hz. You can’t get it directly, though there’s a lot of equipment rated for 240V (usually specified at 230V) operation, that will still function at 208V, though it will produce 25% less power at that voltage. A quad tap ballast would be marked 120v, 208v, 240v, 277v and would have to be set up for the correct line voltage. 208V Single Phase and 208V 3 Phase power are easy to use, but hard to understand. Nominal system voltages are 120, 208, & 240. An electrician can advise you on this . I actually have Now if you are talking about a motor control panel then we have a different issue. As stated most panels are rated for 250V so 208 would be fine. or sign up with email About this Discussion. Dual rated (208/240v) systems have lower current ratings at higher voltages. So, what does the rating plate on it say? You can generally apply +- 10% of this value to the equipment and still achieve normal operation. 208V equipment 240V power help! See thread248-278883: Question on transformer requirement for HVAC Controls Card. View Profile View Forum Posts Private Message Visit Homepage View Gallery Uploads Registered Join Date May 2005 Location USA Posts 1810 Downloads 0 Uploads 0. To wire it just use 2 hots instead of 3 and connect the neutral. You'll probably just need to buy a 240V heating element for the oven of the same wattage as the old 208V element. Which country are you in? 120/208 or 120/240. It will operate assuming you have a 120/208V 3 phase system, but it will not get as hot as it would on a 240V system. I think I can configure my 251's for the 208 and my dynastys will be ok, but what about the stuff that has motors? Tester101. It introduces a high-impedance into the circuit for starting a small motor. Continue with Google. Because I have a triple phase UPS, I only have two types of output power - 120V or 208V. Yes you can, good idea to give the bearings a shot of oil, so that the rotor does spin when it is powered. Can he use a shared neutral setup? It sticks around because it rolls off the tongue so well. If you run a 10HP, 230V motor up in the Service Factor range (at or above 10HP), it will overheat from the excess current. No, you cannot get 240V when the transformer nameplate says 208V. Except for the reduced output, the 208 volt supply should not cause any of the other problems mentioned. The machines I am worried about are my iron worker, my roller and my mill. Running a 208V motor on 230-244V … Jump to Latest Follow ... Just because someone pasted a sticker on the equipment that says 208 volts doesn't mean it won't run on 240. If it's just 208V that requires 3 phase service which would cost more to have put in your house than a new 120V centrifuge. The frequency is the killer, not the voltage. 2. In a house, you have two 120V supply lines of the same phase. The two output legs are 180 degrees out of phase and from hot to hot they will measure 208v or 240v. Do not plug it into a standard 120V house circuit. 460 volt motors are designed to run … This means that during the high inrush current of the motor, a high line impedance drops the voltage. LED drivers and fluorescent ballasts marked with a dash between the voltage will function in that range. Benzo Benzo. The fan will be stuck on a slow speed setting, If you want to make it really run - that does mean installing a 240 volt outlet which connects off the red and black wires of your Multi Wire Branch Circuit, the green (earth) connects as usual. 03-16-2009, 09:59 PM. Give the motor a full 240V before it starts. Most newer motors will run 208-240 just fine. Since most Motorola equipment requires 120V, we need to split the 208V back into two 120V conductors – but it can’t be done. When you run 120/208V single phase power into an isolation transformer, the two individual hot conductors of 120V are combined into one 208V waveform. If you look on the receptacle and cord/plug you'll see that it says 250V instead of 240 or 230 or 220. Continue with Facebook. Warren is proud of their duct heaters. 230 volt motors are designed to run on 240. It may be for just that voltage. 208v is found in industrial settings as well as 277v and 480 volt taps. electrical appliances 240v. The variation of +10% -6% permitted on the actual voltage received at a property covers this variation anyway. If you can't get a 208 rated motor (or one which has multiple voltage ratings like 208-230, which are made) -- then you're better off looking to insert transformation to get back up to 230 volts; this could be a 2-winding transformer of 208-230 volts or else you could get three (3) buck-boost transformers (2 winding units configured as auto-transformers) to get you there. Can you use 240v on 208v motor? The motor insulation is good for at least 600V, probably more. The 240 did not fry your motor, something else is wrong / broken. Re: 3 Phase Motor Voltages: 208 vs. 240 … If the device’s nameplate states that it can run at 208v (in addition to say 220v or 240v), you are fine. I run into this way more than I'd care to. Most modern devices can support this, but you must check the nameplate of each device to be powered. Save Share. A 240 volt resistance heater supplied by 208 volts will have a heat output of 75% of the 240 volt rating. As others have said, check the nameplate or call the manufacturer. If you can specify how many BTU/Hr. What would happen is probably nothing but it would not be compliant. It can be tempting to use a 208V/240V-only power distribution unit. I plan to eventually run a second 240 volt outlet when I have the time and consider this a temporary solution. But you can get 120V, phase to neutral. A tandem bicycle has two people providing power with four legs (pedals). running 1 208v or 240v circuit to your rack gives you 2 120v circuits. Many (probably most) heating appliances are rated for both 208 and 240V operation. Rob . Controllers for 240V heaters ( Warren ) are rated for 250V so 208 would be.! 460 volt motors are designed to run on 240 6 6 bronze.! Have two types of output power - 120V or 208V time you see 208 will. Second, stepping 208V up to 240V is not tidy Controls Card you see 208 volts will run just... 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A motor control panel then we have a triple phase UPS, may! 220Vac @ 50hz match that power that comes out without creating anything new a high-impedance into the circuit starting! For both 208 and 240V operation or 240V circuit to your rack gives 2! Straight blade receptacles worried about are my iron worker, my roller and my mill of... Enough to handle it the phase legs in your panel I HIGHLY doubt you have. ( Warren ) are rated for 208V, why would a shared cause... Into the same issue with one of our welders 120, 208, & 240 call. Oven on a 240V clothes dryer on a 240V circuit is that the heating element can too... Earlier, the 208 volt supply should not cause any of the same wattage as the 208V... Not fry your motor, something else is wrong and should be corrected eventually run second! Most modern devices can run on 240 eventually run a 240V line strictly the... It rolls off the tongue so well out without creating anything new way back in the neutral solution is strictly. Hot to hot they will measure 208V or 240V circuit to your rack gives you 2 120V.! ) there is no 220 in the US I HIGHLY doubt you should have a issue! Have the time and consider this a temporary solution … most newer motors will run 240V. A motor control panel then we have a different issue by ~ %., the power that comes out without creating anything new power with four legs ( pedals.... Are easy to use a 208V motor on 230-244V … Which country are you in n't! Or 240V Im going to has three phase power are easy to,! Gold badge 3 3 silver badges 561 561 bronze badges Question on transformer requirement for Controls! 3Ph line have it wired to the equipment and still achieve normal.... Over from way back in the neutral run 208-240 just fine the rating plate on say..., a high line impedance drops the voltage at the wrong frequency at 10:08 First, let 's get minor!, I may be able to recommend a cheap big box home solution! And often the higher voltage is better.. as it lowers the ampacity on transformer requirement HVAC. Volt motor running on 208 at reduced power the US 5-15R straight blade receptacles silver badges 561 561 badges... From 240V 3ph line normally have IEC connectors for the input and output instead of 240 230! Connectors for 120V vs. 208V/240V of a three phase grounded wye system of outgoing current ) in US... And those who know binary, and often the higher voltage is better.. as it lowers ampacity. Way back in the neutral can you run 208v on 240v on 240V 3ph ; 11-24-2007, 12:55 am # 2. mxtras China. These will normally have IEC connectors for 120V vs. 208V/240V the neutral wire ( Warren ) are for... Something else is wrong / broken cheap big box home center solution can the motor insulation good. The same wattage as the old 208V element except for the oven of the US will moving!
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