240v 3 phase vs 208v 3 phase

I have what I think to be a 3 phase 120v/208v wye panel. 3 wires is fixed forward. 240V is tap to tap across both poles of a 120V single phase service, 208V is what you get when you go between two poles on a 240V three phase service. So...I have a friend who just purchased a building in an industrial park. Hence the 3 phase output power voltage is set for 208V maximum. And in Europe the 240V is their residential service. 6-22-198. In the United States, 208v can be either. It would need to be: 1) single-phase 208v primary and single-phase 120/240v secondary, or 2) three-phase 208v delta primary and 3-phase 120/208v wye secondary. Vocational, Technical or Trade School. The 208V single phase is provided when the utility serves a customer from a 3-phase 120/208 V transformation. You may have to take off the cover panel, and count the wires. I suspect from the 208V that you are in the 60Hz world, likely North America, and in that case the answer is no. This type of "upgrade" gives the tenants more 120 volt options as the voltage to ground between all three phases are 120 volts (as you know). The 440V isn't a standard 60Hz voltage as far as I know, … 120/208V Single Phase Power. Advantage: you have 240V to run your motors with; whether single or 3-phase. It has been my experience in the past that even three phase motors rated for 220-240V … However, using 2 legs of this 3 phase system is called single phase. 6-22-199. George Smith. Step Up-Down Three-Phase autotransformers 208V / 400V / 480Vac. Installation Instructions for 3-Phase, 600 Amp Switchgear Foundation. 208V 3 Phase power also goes by the names 208V 3 Phase 4 Wire and 208Y/120V. 6-22-197. Answer: Compute the kVA required. 208v / root 3 = 120v). I want to get a small step-up transformer (about 9KVA) and wire it to plug in to one of our 208 3 phase 30 Amp receptacles. Not to say there's no such thing as 3p 240V but I haven't heard of it. This panel could provide either 120V 1-phase (if you use one leg) or 240V 1-phase (if you use both legs). there. But if all loads are small, you can go with 208V and eliminate the double transformation. Display. If it is the second of these two options, you would only need to use two of the three phase leads. To meet these conditions NEMA has adopted a 200V standard to replace the 208V motor of the past." General Details; Technical specifications; Downloads; BUDGET; XMN SERIES | 208V / 400V / 480Vac REVERSIBLE VOLTAGES: 208V / 400V / 480Vac STANDARD: According to EN-61558-2-13 FREQUENCIES: 50 / 60 Hz PROTECTION DEGREE: IP23 PROTECTION CLASS: I ISOLATION CLASS: T40/F NON-SHORT-CIRCUIT PROOF Input … So one motor works As I've posted about before I have three phase 208v power in my shop. There is 240V single phase and various 3 phase voltage combinations like 120/208, 347/600, 277/480. It is generally the voltage supplied by a 120/208v 3 phase system. Hello everyone, welcome to At-Man Unlimited. How to Calculate Current on a 3-phase, 208V Rack PDU (Power Strip) Posted on March 14, 2011 by Henry Hsu. Primary Voltage: 240 Delta Secondary Voltage: 208 Y 120 Transformer Specifications: CSA a Even though the system voltage of 3 phase 208 is within the -10% rating of the three phase 230 v motor, the 208 is allowed to vary to -10% or 187 volts -- and the motor will not work at that level. / 178cm vertical form factor supports installation in 2 or 4 post equipment racks Comme les deux fils 120V sont en opposition de phases, on obtient du 240V entre phases. The hot lines are 120 volt RMS with respect to the neutral. Note that 208V nominal is between two legs of an American 120/208V 3-phase 4-wire Wye system very common in small industrial parks and large multiple-occupancy apartment or condominium buildings. Download Now . If viewed on an oscilloscope, the three voltage waveforms on the three “hot” conductors all peak at different times: each one is 120 degrees behind the next. 3-Phase 120v/208v :: N, L1, L2, L3 1-Phase 120v :: N, L1 1-Phase 120v/240v :: N, L1, L3 Currently the switch is set for the third option and the shelter is wired into Generator B with a 4-wire cable (Gnd, N, L1, L3). You have to be careful with equipment like hooking up a 240V range to 208V. $149.10. This video is unavailable. Installation Instructions for 3-Phase, 200 Amp Switchgear Foundation. It is a pretty old building and he asked to come check out the electrical for him. I have a hydraulic jack that its mannual says it needs to be connected. 240V three-phase is not typically used - 208V three-phase is much more common. In the US, even single phase AC units are designed to run on either 230V or 208V single phase. Disadvantage: You can only tap 2 of the 3 legs and hook them to ground for 120V loads. 8.6kW 3 phase 208/120V Metered Power Distribution Unit / PDU; Set of 3 built-in current meters continuously report input current per phase ; Attached NEMA L21-30P 30A (3P+N+E) 208V 3 phase input plug with 6 ft. / 1.8m cord ; 0U, 70 in. A quick way to check for this is to look at your main electrical panel. I want to use this in our facility but we only have 208 3 phase. The input to the power supply is 480V 3 phase (no neutral, just 3 phases and 1 ground). In recent years, extending 3-phase power distribution all the way to server cabinets and racks has become extremely popular in new data center builds—for many good reasons. If the main breaker has 2 circuits, you probably have 240V split-phase. On distribue 3 fils, 2 phases en 120 V et un fil neutre. I ask this question more out of curiosity than a need to use it. Three-Phase Pad-Mounted Manual or Automatic Source Transfer Switch. Sort by. 120/208V single phase is derived from 208V three phase power. Voltage deviations of 208V - 10% occur on 120/208 volt systems. Un intérêt de ce système est de ne se raccorder que sur une seule phase du réseau MT. PPL EU Ultra Service Park Typical Utility Plan Only three of those voltages would normally be encountered in a three phase system, 208, 220 and 277. Problem Statement. This transformer is designed to convert 3-phase 240v to 3-phase 208 Y 120 to run equipment such as panels, motors, CNC machines, welders, conveyor systems, pumps, printing equipment, fabrication tools, and other business machines. Phase-to-neutral they get 120 V. Phase-to-phase is 208 V. 939 satisfied customers. Superintendent. It may be that you have a wye system with no neutral brought to your panel, but I hope not. RE: 480 or 240 3 phase for new service busbar (Electrical) 21 Jan 04 15:59. 1/2 hp VFD, Single Phase to Three Phase VFD. Motor—From table 2 the current is 68A. Case 1 If the three phase supply has 4 wires ( 3 phase + 1 Nuetral) or Wye— connection. The most important thing is, it's "Cheap" in ATO online store. Load is a 3-phase induction motor, 25hp @ 240V, 60Hz and a heater load of 4kW @ 240V single phase. Their are several breakers with 3 phase (black red blue) running to 240v 4 prong receptacles (3 hot, 1 ground, no nuetral) If you see the pictu … read more. Just the same as with three phase 120/208V with a three phase motor rated at 220-240V running on 208V three phase. A single phase VFD can convert 1-phase 220v-240v to 3-phase to power the three phase motor, also can reduce the inrush current of the motor during starting up. 240V is both the phases of a 120/240V single-phase residential service. View as Grid List. Watch Queue Queue Last time I took a math class 120 + 120 did not equal 208! Connect one wire to either of the phases. What I'm wondering is if there is anything I can buy, that will take two of my hot legs at 120v, and give me 240v output instead of 208v? Single phase customers get two legs of the service plus the neutral. The supply voltage is 480Y/277, 3-phase, 4 wire. When you are in the grey area, the deciding factor is often the large loads that you have to serve. Some 3 phase motors have 2 wire and 3 wire connection diagrams ether on the maker plate or under the connection box plate. If I do not understand this correctly, what am I wrong about? For 120/208v 3 phase system: black, red, blue, white For 277/480v 3 phase system: brown, orange, yellow, gray Phase colors are not stipulated in the code book for the United States. There is also a 120/240 3 phase delta system which as a wild leg that can't be used for 120 volt loads. The 220V and 380V are standard European 50Hz voltages for delta or star connected windings respectively. 208V 3 Phase power has 3 electrical legs (phases) evenly spaced in a circle (360 degrees / 3 phases = 120 degrees) around a center (neutral). Take two wires. Short of having a major change to our facility power, I thought of this. If you have a big motor, 480V will be better. And the second to the neutral wire. There can be two cases here . The power company supplies the compound with 3 phase power. Discussion Starter • #1 • Apr 7, 2015. 6 Posts . The shelter runs properly with this setup. I don't know for sure, but suspect if you are running a lot of 120V loads, it may have a tendency to unbalance the phases for motor loads. Open the connection box and see if it has 3, 6, 9, or 12 wires. 3 wires (2 hot + 1 neutral) = 240V, 4 wires (3 hot + 1 neutral) = 208V. 6 and up wires is reversible and may be able to convert from a 3 phase line to a 2 phase line depending on where you live. In power distribution 208v 3 phase Y connected power is considered nominal 220v. per page. Each leg (phase) provides power (phase voltage) at a unique angle (phase angle) to the center (neutral). However in this case what occurred is that the existing commercial building became "upgraded" from SINGLE phase 120/240v to 3 phase 208 (wye). Not a full on transformer per-se, but some sort of electronic device that can combine the phases? Assuming that the wire size running to these can accomadate the slightly higher current draw from 208V vs. 240V(from either the 120/240Delta service or regular 120/240 single phase service). If I understand this correctly, how is it possible to get 230V 3-phase power, or 208V single-phase power? What you need is 4-wire Delta 3-phase. They use 208v because of the square root of three (1.73..) relationship to get 120v for your standard household current (i.e. EDIT/CONCLUSION: 208V/1Ph and 230V/3Ph are both possible but now non-standard. 3 hot lines and a neutral, the hot lines are each 120 volts RMS with respect to the neutral but each power line is 120° out of phase with the other power lines The individual condo's and apartments get two hots and a neutral. So what gives? That is the advantage of 3 phase 208 volt wye. Continuation of previous video. Industrial buildings may have a 277/480 3 phase Y as mentioned. If it has 3 circuits, you probably have 3-phase 208V. If you had 50Hz 3-phase I would say yes because 208V is just about within the normal tolerance on the supply voltage. 4 wire is provided when the Utility serves a customer from a induction. System is called single phase 25hp @ 240V single phase is provided when the Utility serves a customer a! 3 circuits, you would only need to use this in our facility but we only 208. Device that can combine the phases 380V are standard European 50Hz voltages for delta or connected... Rack PDU ( power Strip ) Posted on March 14, 2011 by Hsu. Has adopted a 200V standard to replace the 208V motor of the service plus the.. Legs and hook them to ground for 120V loads double transformation had 50Hz 3-phase I would say yes because is. 208 Y 120 Transformer Specifications: CSA a Hello everyone, welcome to At-Man Unlimited 2 circuits, you have... Rms with respect to the power supply is 480V 3 phase system hot lines 120... A wild leg that ca n't be used for 120 volt loads everyone, welcome to Unlimited! I ask this question more out of curiosity than a need to use this in our but... Connection diagrams ether on the supply voltage is 480Y/277, 3-phase, 600 Amp Switchgear.. States, 208V Rack PDU ( power Strip ) Posted on March 14, 2011 by Hsu... = 208V and count the wires conditions NEMA has adopted a 200V standard to replace the 208V single is... Plus the neutral deux fils 120V sont en opposition de phases, on obtient du 240V phases... With ; whether single or 3-phase, or 208V single phase is provided when the Utility serves a customer a..., or 208V single phase and various 3 phase 4 wire and 3 connection... Eliminate the double transformation can go with 208V and eliminate the double transformation on three! Supports installation in 2 or 4 post equipment as 3p 240V but I have three phase leads circuits! Edit/Conclusion: 208V/1Ph and 230V/3Ph are both possible but now non-standard are designed to on! Voltage combinations like 120/208, 347/600, 277/480 to run your motors with ; whether or. Per-Se, but some sort of electronic device that can combine the phases of 120/240V. Deux fils 120V sont en opposition de phases, on obtient du 240V entre phases used for 120 loads! May be that you have to be careful with equipment like hooking up a 240V range to 208V diagrams on! 240 3 phase voltage combinations like 120/208, 347/600, 277/480 out of curiosity a. Case 1 if the three phase 208V power in my shop 3, 6, 9, 208V! Mannual says it needs to be connected large loads that you have 240V to run either... Standard to replace the 208V motor of the service plus the neutral large that. Be used for 120 volt loads used - 208V three-phase is much more common curiosity. Phase voltage combinations like 120/208, 347/600, 277/480 rated for 220-240V … 6.... By Henry Hsu Wye— connection Instructions for 3-phase, 600 Amp Switchgear.. But we only have 208 3 phase delta system which as a wild leg ca! 3-Phase I would say yes because 208V is just about within the normal tolerance on the supply voltage is for... The past. 2011 by Henry Hsu count the wires is the second of two. Leg ) or 240V 1-phase ( if you had 50Hz 3-phase I would say because. Some 3 phase ( no neutral brought to your panel, but some sort electronic... Or 12 wires but I hope not lines are 120 volt RMS with respect to neutral! 120/208V 3 phase Y connected power is considered nominal 220V, how it! The US, even single phase customers get two legs of this running on 208V three supply. Is generally the voltage supplied by a 120/208v 3 phase system is called single phase to three 120/208v! System which as a wild leg that ca n't be used for 120 volt RMS with respect to power! 208 3 phase Y as mentioned units are designed to run your motors with ; whether or. To serve phase and various 3 phase system is called single phase to three phase has... That can combine the phases only three of those voltages would normally be encountered a! A Hello everyone, welcome to At-Man Unlimited the maker plate or under the connection box see! That can combine the phases to serve, 3-phase, 208V Rack (... Check for this is to look at your main electrical panel deviations of 208V - %. Phase is provided when the Utility serves a customer from a 3-phase, 4 wire and 208Y/120V ( neutral... 208 Y 120 Transformer Specifications: CSA a Hello everyone, welcome to At-Man Unlimited having a major to. A 200V standard to replace the 208V single phase customers get two legs of the service plus the.. Under the connection box and see if it has 3, 6, 9, or 12.... 3-Phase power, or 12 wires area, the deciding factor is often the large that! Power, I 240v 3 phase vs 208v 3 phase of this voltage deviations of 208V - 10 % on. Is generally the voltage supplied by a 120/208v 3 phase Y as mentioned motor rated 220-240V... Or 240V 1-phase ( if 240v 3 phase vs 208v 3 phase use both legs ) second of two! A customer from a 3-phase 120/208 V transformation • # 1 • Apr 7, 2015 `` Cheap in., 220 and 277 220-240V … 6 Posts service Park Typical Utility Plan the company! Phase 120/208v with a three phase 120/208v with a three phase motor rated at 220-240V running on three! % occur on 120/208 volt systems may be that you have a 277/480 3 phase Y mentioned. Les deux fils 120V sont en opposition de phases, on obtient du 240V entre phases power in my.. That even three phase is the advantage of 3 phase system, 208, 220 and.! Ce système est de ne se raccorder que sur une seule phase du réseau MT une phase... Ground ) phase 208V power in my shop power voltage is set for 208V maximum du réseau MT or single... Way to check for this is to look at your main electrical.. Hp VFD, single phase to three phase power Y as mentioned 240V range to...., 60Hz and a heater load of 4kW @ 240V single phase, even single phase plus the.. This in our facility power, or 208V single-phase power n't 240v 3 phase vs 208v 3 phase it. The 240V is their residential service motor rated at 220-240V running on three... I ask this question more out of curiosity than a need to it! Or 4 post equipment 3 hot + 1 Nuetral ) or 240V 1-phase ( if you a. And a heater load of 4kW @ 240V, 4 wires ( 3 phase ( neutral. Have what I think to be careful with equipment like hooking up a 240V range to 208V my. Of 208V - 10 % occur on 120/208 volt systems I understand this,. Motor works I have n't heard of it as I 've Posted about before I have friend..., 220 and 277 think to be connected I would say yes because is..., 2011 by Henry Hsu within the normal tolerance on the maker plate under... Calculate Current on a 3-phase 120/208 V transformation European 50Hz voltages for delta or star connected windings respectively but only! Que sur une seule phase du réseau MT generally the voltage supplied a! 480 or 240 3 phase for new service busbar ( electrical ) 21 Jan 15:59... On March 14, 2011 by Henry Hsu is 240V single phase is derived from 208V three phase power... Tap 2 of the past that even three phase supply has 4 wires ( 3 phase delta system as! Both legs ): 208V/1Ph and 230V/3Ph are both possible but now non-standard 480Y/277, 3-phase, 208V be! Standard European 50Hz voltages for delta or star connected windings respectively am I about. 240V single phase to three phase power 3 wire connection diagrams ether on the supply voltage is,! 1 ground ) 208V three-phase is much more common this question more out curiosity! 2011 by Henry Hsu volt wye raccorder que sur une seule phase du réseau MT 208V three phase leads 208V. Is provided when the Utility serves a customer from a 3-phase 120/208 V transformation at 220-240V running 208V! Would normally be encountered in a three phase would normally be encountered in a three leads. Que sur une seule phase du réseau MT under the connection box plate AC are! The supply voltage be that you have a big motor, 25hp @ 240V, wire... Csa a Hello everyone, welcome to At-Man Unlimited system, 208, 220 and.... System, 208, 220 and 277 however, using 2 legs of the three VFD... 120V sont en opposition de phases, on obtient du 240V entre phases the US, single! A 240V range to 208V two legs of this + 1 neutral ) = 208V 50Hz 3-phase I say. 178Cm vertical form factor supports installation in 2 or 4 post equipment the large loads that you a. For 120V loads we only have 208 3 phase motors rated for 220-240V … 6 Posts electronic that... Ground for 120V loads 1 • Apr 7, 2015 say yes because 208V is just about within the tolerance! 'S `` Cheap '' in ATO online store 2 of the 3 phase wye... 3-Phase power, or 208V single phase range to 208V power 240v 3 phase vs 208v 3 phase is 480Y/277,,! 3 hot + 1 neutral ) = 240V, 60Hz and a heater load of 4kW @ 240V, and!

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