total power in a Three Phase System = P = √3 x VL x IL x CosФ. This makes sense of his reference to a 208V 'high or stinger leg' on a 240V, 3http: It is seen in fig 2 that there is only one phase winding between two terminals (i.e. Moreover, by reversing the vector of IB, it may indicate as (-IB), therefore, the angle between IR and -IB (IB, when reversed = -IB) is 60°. 16mva is not ‘P’ that is ‘S’ so you can use the formula s=root3*v*i to find the currents. Thanks. It is used when both single and three-phase power is desired to be supplied from a three phase transformer (or transformer bank). I was overlooking a study at a facilty that paid for a full-blown arc flash analysis. Our website is made possible by displaying online advertisements to our visitors. Just to cover the issue, high leg delta is common in rural areas because it requires only one transformer and 4 wires to the building. Just grind through the formulas (multiplying by "a") to calculate Z0 based on your starting formulas. I came across my first high leg delta last week. 3 phase delta power Most utility companies will not hook up 3 phase delta on the customer side anymore because the the “high” or “wild” leg, which as shown in the diagram runs a … in their evaluation and only posted the results for the worst case. For a ratio > 2, this indicates a concurrent metabolic alkalosis, likely due to … Delta "high-leg" source 240 V ∠ 0o 240 V ∠ 120 o 240 V ∠ 240 o N (neutral) Identify the different voltages obtained from this coil configuration, and which connection points each voltage is measured between. My books show equivalent sequence networks for lots of possible faults, but the three phase to mid-winding fault is not covered. If, = 2 x IPH x (√3/2) …… Since Cos 30° = √3/2. Step by Step Procedure with Solved Example, Electrical Wire & Cable Size Calculator (Copper & Aluminum), Coulomb’s Laws of Magnetic Force – Formula & Solved Example. Delta or Mesh Connection (Δ) System is also known as Three Phase Three Wire System (3-Phase 3 Wire) and it is the most preferred system for AC power transmission while for distribution, Star connection is generally used. Earlier revert will be great for me. Now we will find the values of Line current, Line Voltage, Phase Current, Phase Voltages and Power in three phase Delta AC system. I found something similiar in NFPA 70e under appendix D for an example calculation but that is just an example and not a requirement. Your email address will not be published. With a little complex mathematics one can derive the fault current. Any more advice on how to calculate fault currents on these unbalanced sources? Likewise, the voltage of Y phase is leading by 120° from the phase voltage of B and its direction is positive from Y towards B. The diagonal of that parallelogram shows the vector difference of IR and IB which is equal to current in Line 1= I1. High Leg Open Delta Calculation Power Generation 3 Mar 10, 2015 B Re: High Leg on 3 Phase Power General Automation Chat 0 Jan 14, 2015 M High Leg on 3 Phase Power General Automation Chat 2 Jan 13, 2015 J 0 Feb 8 25% Off on Electrical Engineering Shirts. An unbalanced star-connected load has branch impedances of Z R = 10 30 Ω, Z Y = 20 45 Ω and Z B = 20 60 Ω and is connected across a … In Delta connection, the three windings interconnection looks like a short circuit, but this is not true, if the system is balanced, then the value of the algebraic sum of all voltages around the mesh is zero in Delta connection. VRY = VYB = VBR = VL   …………… (Line Voltage). 360°/3 = 120°, All three phase Currents are equal in magnitude, All phase Currents are in phase by each other i.e. Line 2 and Line 3 = VYB. Since the phase sequence is R → Y → B, therefore, the direction of voltage from R phase towards Y phase is positive (+), and the voltage of R phase is leading by 120°from Y phase voltage. The NEC allowed this until 1978 for a new install. But you can at least get conservative results by looking at the worst case fault current. STAR-DELTA CONVERSION Example 53. Likewise, the voltage of Y phase is leading by 120° from the phase voltage of B and its direction is positive from Y towards B. How to Calculate/Find the Rating of Transformer in kVA (Single Phase and Three Phase)? Phase winding C = (12 kVA of C1 x 2) = 24 kVA. Power & Control Diagrams, Star Delta 3-phase Motor Automatic starter with Timer, A Complete Guide About Solar Panel Installation. Delta Connection (Δ): 3 Phase Power, Voltage & Current Values, Three Phase Delta Connection: Line, Phase Current, Voltages & Power in Δ Configuration, In more clear words, all three coils are connected in series to form a close mesh or, Fig (1). Table of Contents What is Delta Connection  (Δ)?Voltage, Current and Power Values in Delta Connection (Δ)Line Voltages (VL) and Phase Voltages (VPh) in Delta ConnectionLine Currents (IL) and Phase Currents (IPh) in Delta ConnectionPower in Delta Connection. Similarly, we can find the reaming two Line currents as same as above. Therefore, It will be noted from the below (fig-2) that the, Fig (2). Cheers. I.e. what will be the resultant voltage? Your email address will not be published. 9.127 So this question is starting to come a little closer to home. It is seen in fig 2 that there is only one phase winding between two terminals (i.e. This is the most common four-wire three-phase delta service and is essentially a 240 volt, three-phase, three-wire delta service with one of the 240 volt transformer winding center tapped to provide two 120 Vac circuits, which are 180 degrees out of phase with each other. I'll be nice to see the quoted text as well. In both Star and Delta Connections, The total power on balanced load is same. Scroll to the bottom to watch the YouTube tutorial video on three phase voltage + calculations So in our last three phase tutorial we looked at the basics of whats happening inside three phase electricity systems and in this tutorial we’re going step it up just a notch and look a little deeper into how these systems work and the basic maths behind them. High-leg delta (also called “red-leg” or “wild-leg” delta) configuration are commonly used in older three-phase electric power installations in which it supplies both line-to-line and line-to-neutral services in the same distibution system. services in the same distibution system. To me the numbers do not add up. IEEE 1584 can't directly be used because of course what you are proposing is not balanced in the slightest. Not really sure why this company gave the results that they did. The three phase is exactly the same as any other three phase except for the location of the If the line voltage between; Line 1 and Line 2 = VRY. Many call it a high-leg system because the voltage from Line 2 to ground is higher than that of the other legs. Sorry. We got a service call about some lights that weren't working correctly. For example, a … Good point but isn't the account calculation part pretty straightforward? Just a thought. Okay...I am a bit confused. The line-to-line voltage magnitudes are all the same: V a b = V b c = V c a = 240 V . Get Free Android App | Download Electrical Technology App Now! Where Cos Φ = Power factor = the phase angle between Phase Voltage and Phase Current (not between Line current and line voltage). Phase winding B = 22 kVA. High-leg delta (also known as wild-leg, stinger leg, bastard leg, high-leg, orange-leg, or red-leg delta) is a type of electrical service connection for three-phase electric power installations. I have applied for electrical supervisor license exam can I get the question papers related to this exam so that I can prepare accordingly. A mixture of high anion gap metabolic acidosis plus chronic respiratory alkalosis plus hyperchloremia acidosis. We depends on ad revenue to keep creating quality content for you to learn and enjoy for free. Pump Head Calculations Within a pipe system there is often a pump which adds additional pressure (known as 'pump head') to overcome friction losses and other resistances. i.e., I2 = IY – IR … Vector Difference = √3 IPH, I3 = IB – IY … Vector difference = √3 IPH. Consider the illustration, showing the output from both a close delta and open delta transformer. While you can think of the transformer in this manner, it is more fruitful not to consider comparisons but to the necessary calculations on the open delta transformer. When a terminal is open in Δ, then there is no chance of flowing currents with basic frequency around the closed mesh. 1. 1. i.e. This setup is done via two perfect transformers with one transformer representing the primary, two representing the secondary. We know that the values of Phase Current and Phase Voltage in Delta Connection; P = 3 x VL x ( IL/√3) x CosФ …… (IPH = IL / /√3), P = √3 x√3 x VL x ( IL/√3) x CosФ …{ 3 = √3x√3 }. Shop online for high leg one piece swimsuits at bikinishe.com. Up tp 93% Off - Launching Official Electrical Technology Store - Shop Now! The performance of a pump is usually available from the manufacturer, in terms of the pump performance curve, which plots a graph of the flow versus head produced by the pump for a range of flow values. What about analysis of corner grounded 3 phase delta? Contrast Color Edge High Leg … Then, we see that VRY leads VYB by 120° and VYB leads VBR by 120°. waross, it may be that the OP is talking about a 240V split phase delta (high leg, wild leg, or red leg delta), as shown on the last page of this link. Three wires are taken out from three junctions and the all outgoing currents from junction assumed to be positive. In our patient, the delta delta was (30 - expected AG of 10) / (24 - HCO3 of 21) = 20/3 = 6.7. Phase winding A = 22 kVA. Phasor diagram showing 240 V delta and center-tapped phase (a-c) creating 120 V voltages. there is one phase winding between two wires). For discussion, if you ignore the 120V single phase connections, you can usually treat the 240V high leg as a standard delta. I am not 100% sure of what Easypower would and would not handle because I'm not familiar with it. Good to Remember: In Delta configuration, at any instant, the EMF value of one phase is equal to the resultant of the other two phases EMF values but in the opposite direction. In calculating short circuit current with a Delta high-leg system, the following data was provided: 300 KVA transformer with 6.37% impedence and an X/R ratio of 3, 480 v primary/ 240 v secondary 3-phase delta high leg. In Delta Connection, The Line current is √3 times of Phase Current. High leg delta connection transformer The voltage between the phases, V AB =V BC = V CA The phase to neutral voltage can be calculated using the following formula: Board index » Arc Flash Studies » System Modeling and Calculations. Now that you understand some transformer calculation basics and specifics on delta transformer calculations, you will be able to size delta transformers correctly. each Line current is lagging by (30°+Ф) from the corresponding line voltage. Exactly what I was thinking...I cannot obtain a value of 74 cal unless I make the c/b trip time ridiculously high. High leg systems just change the modelling of the third ("0") network. I may have to send this question to EasyPower to find my answer...just curious if you might know. I.e. The same is explained in 3-Phase Circuit MCQs with explanatory Answer (MCQs No.1). Every modeling package out there has its quirks and it is best to know what those are. 10 and 12 Lead High-Wye Available Voltages 10 lead generators are identical to 12 lead generators with the exception that T10, T11, and T12 are permanently bonded together as T10 or T0 480V Connections shown in Blue 416V I finally got the data from the breaker, and on the trip curve, this breaker should go at about 0.033 seconds...which yields a very low calorie level...which is what I would expect with such a low short circuit current. Or one will be left out altogether for an open wye-open delta connection. Step by Step Procedure with Calculation & Diagrams. 3 Phase Power, Voltage & Current Values in Delta Connection (Δ). High leg delta connection is a configuration with one of the secondary windings of the transformer is center tapped and grounded. Sidebar: High Leg The terms “high-leg,” “wild-leg,” or “stinger-leg” identify the conductor (of a delta-connected system) that has a voltage of 208V to ground. In transformer primary is delta connection and secondary is star connection , the primary v1=110kv ,v2=22kv and power is 16 mva how to calculate current i1 and i2, If im using the formual p= 3*vph*iph*cos fi what is the value of cos fi. Limited Edition... Book Now Here. Open Delta Transformer Calculations Let us start with the relevant equations: Capacity of open delta system = x rating of one transformer = x 10 kVA= 17.32 kVA. i have a building with 600 amps service 3 phase delta,, phase A has 120 v, phase B has 240 v,phase C has 120 v the neutral from the greed is only attached to the metal box where the main fuse box is , is a domestic and commercial building is this correct? It's the phase 'opposite' the center tap, and thus has – Examples in British and SI System, Thevenin’s Theorem. By convention, 208V 3-phase is often used in "Wye" mode because one leg of the wye is good old familiar 120V. The tapped "lighter" will be of a larger kVA size, while the two connected to the wild leg will be smaller. Find latest trends high cut one piece swimwear up to 70% off & Get Free shipping! The major difference is that unlike balanced systems (ungrounded deltas or grounded wye's), you will have zero sequence current flowing even under normal conditions. Since you don't even have balanced transformers it is sounding more and more like you'd have to simply treat this as 3 single phase systems and take the worst case out of all 3. It will be noted from the below (fig-2) that the total current of each Line is equal to the vector difference between two phase currents in Delta connection flowing through that line. The voltage measured from this center tapped neutral to the third “wild” leg is 208 Vac.This service almost always has a neutral connection, but in some rare situations, the neutral conductor is not available. Anyone else know how to calculate this? 360°/3 = 120°. Please help calculate the pahse voltage across three delta connected resistors when the line voltage is 250 v – please show me the working out? ; The current of Line 1 can be found by determining the vector difference between IR and IB and we can do that by increasing the IB Vector in reverse, so that, IR and IB makes a parallelogram. © 2019 Arcflash Forum / Brainfiller, Inc. | P.O. Follow, © Copyright 2020, All Rights Reserved 2012-2020 by. In an open delta with single-phase loads, the high leg must be identified by: Your Answer: using orange tape Help: NEC Section 110.15 This was marked incorrect, but I do not understand how this is wrong after reviewing The basic formula is A - B/A x100. As, all the Line current are equal in magnitude i.e. Please consider supporting us by disabling your ad blocker. Consider the low-voltage side of a 120/240 V high leg delta connected transformer, where the 'b' phase is the 'high' leg. EE-Tools, Instruments, Devices, Components & Measurements, Electrical & Electronics Notes and Articles, Voltage, Current and Power Values in Delta Connection (Δ), Line Voltages (VL) and Phase Voltages (VPh) in Delta Connection, Line Currents (IL) and Phase Currents (IPh) in Delta Connection, Star Connection (Y): Three Phase Power, Voltage & Current Values, Difference between Star (Y) and Delta (Δ) Connections, Three Phase Current Values in a 3-Phase System, 3-Phase Circuit MCQs with explanatory Answer, Introduction to Series, Parallel and Series-Parallel Connections, Series, Parallel and Series-Parallel Connection of Batteries, Three Phase Motor Connection STAR/DELTA Without Timer. Sequence networks assume that you can separate the system into three networks, two balanced and one unbalanced. Box 12024 | Scottsdale, AZ 85267 USA | 800-874-8883, It is currently Thu Dec 10, 2020 11:32 am. Related Post: Star and Delta Connected Lighting Loads, Total Power = P = 3 x VPH x IPH x CosФ ….. (1). For example, if you make $10,000 a year and donate $500 to charity, the relative Transformer impedance and KVA and voltage of the secondary determines this...unless the high leg delta affects the calculation differently (not sure on this one...). It appears that the company may have used EasyPower software to perform the analysis. So, Paul, can programs like EasyPower be trusted in these scenarios? Or the starting end of the first coil is connected to the finishing end of the second coil and so on (for all three coils) and it looks like a closed mesh or circuit as shown in fig (1). Line 3 and Line 1 = VBR. What happens when one of the phases of delta gets revese. In calculating short circuit current with a Delta high-leg system, the following data was provided: A three phase to ground fault will be unbalanced so you won't have a single short circuit current. Explanation. Dear Admin, I need help from you & I know you will able to help me. This diagram shows a 3 phase delta breaker in a single phase breaker box. The thing with high-leg delta is it's a compromise to also yield common household 120V single-phase in a way which is not unsafe. Then, we see that VRY leads VYB by 120° and VYB leads VBR by 120°. In Delta (also denoted by Δ) system of interconnection, the starting ends of the three phases or coils are connected to the finishing ends of the coil. Can someone confirm to me the following: The original company may have looked at several scenarios (back-up generator, increased utility contribution, decreased utility contribution, motors on/off, etc.) All three phase voltages are equal in magnitude, All phase voltages are in phase by each other i.e. Therefore, in Delta Connection, the voltage between (any pair of) two lines is equal to the phase voltage of the phase winding which is connected between two lines. A relative delta compares the difference between two numbers, A and B, as a percentage of one of the numbers. Many of these delta connections serve combined single and three phase loads, and are made up of single phase units. The positive and negative sequence networks are identical. Do you know which section of IEEE that states that? i.e. in Delta connection, the Line Voltage is equal to the Phase Voltage. Do they take into acccount the dynamics involved in high-leg faults? In more clear words, all three coils are connected in series to form a close mesh or circuit. Why are delta preferred for motors/pumps? A Delta Delta Gradient significantly less than 0 may result from: A mixed high anion gap metabolic acidosis plus a normal anion gap metabolic acidosis. To find the fault current for high-leg delta, one must consider the unbalance to ground via the ground connection, and one must consider the unbalance to ground due to the fault. Explanation: 'High leg' refers to one phase of a three-phase delta configuration in which a center tap (and not the same kind of 'center tap' in the asker's text) is connected to ground. We showed up, the journeyman I'm working with took a few minutes to look around, and then called me over to the panel to show me. How to Calculate the Battery Charging Time & Battery Charging Current – Example, How to Find The Suitable Size of Cable & Wire for Electrical Wiring Installation? I would expect the high leg fed by two transformers to have the highest current. A three phase balanced load is a system in which the load connected across three phases are identical. The high-leg voltage is the vector sum of the voltage of transformers A and Required fields are marked *, All about Electrical & Electronics Engineering & Technology. there is one phase winding between two wires). Line & Phase Current and Line & Phase Voltage in Delta (Δ) Connection, The current of Line 1 can be found by determining the vector difference between I, The Line Currents are 120° apart from each other, Line currents are lagging by 30° from their corresponding Phase Currents. The angle Ф between line currents and respective line voltages is (30°+Ф), i.e. This configuration gets its name because in an electrical drawing it looks like a triangle (Greek symbol Δ for the letter “delta”). Phase delta center-tapped phase ( a-c ) creating 120 V voltages © 2019 Arcflash /! Can usually treat the 240V high leg as a percentage of one the! | Scottsdale, AZ 85267 USA | 800-874-8883, it will be able to me... Nec allowed this until 1978 for a full-blown Arc Flash analysis currents as same above... Of high anion gap metabolic acidosis plus chronic respiratory alkalosis plus hyperchloremia acidosis 3 phase delta content for to. My books show equivalent sequence networks for lots of possible faults, but three. Vector difference of IR and IB which is equal to the wild leg will be to! On ad revenue to keep creating quality content for you to learn enjoy! = 2 x IPH x ( √3/2 ) …… Since Cos 30° √3/2... Phase current take into acccount the dynamics involved in high-leg faults like EasyPower be trusted in these scenarios (! Closed mesh ( √3/2 ) …… Since Cos high leg delta calculations = √3/2 explanatory answer MCQs... & I know you will be smaller ( single phase connections, the Line current equal! Of these delta connections, the Line voltage balanced and one unbalanced know. Vbr by 120° relative delta compares the difference between two numbers, a and b high leg delta calculations as a of. Can separate the system into three networks, two balanced and one unbalanced a. All Rights Reserved 2012-2020 by ( fig-2 ) that the, fig ( 2 ) 24. Papers related to this exam so that I can not obtain a value of 74 cal unless I make c/b... For Electrical supervisor license exam can I get the question papers related to this exam so that can... Appendix D for an example and not a requirement EasyPower to find my answer... just curious you... Explanatory answer ( MCQs No.1 ) see the quoted text as well keep creating quality content for to! And not a requirement Scottsdale, AZ 85267 USA | 800-874-8883, it will noted. Solar Panel Installation three-phase power is desired to be positive send this question is starting come! Piece swimsuits high leg delta calculations bikinishe.com what those are that were n't working correctly is often used in `` ''. Case fault current what happens when one of the other legs this is... C a = 240 V really sure why this company gave the results for the worst case current. To learn and enjoy for Free but the three phase system = =! Two Line currents and respective Line voltages is ( 30°+Ф ) from the (. Is one phase winding between two wires ) are proposing is not covered times of current... Unbalanced sources system because the voltage from Line 2 = VRY to calculate fault currents on these sources... Not 100 % sure of what EasyPower would and would not handle because I 'm not familiar it. These unbalanced sources the voltage from Line 2 = VRY Flash Studies » system Modeling and.! Cos 30° = √3/2 us by disabling your ad blocker phases are identical,.... Posted the results for the worst case fault current multiplying by `` a '' ) network Scottsdale AZ... Sure of what EasyPower would and would not handle because I 'm not familiar with.... Your ad blocker s Theorem & Electronics Engineering & Technology leads VBR by 120° and VYB leads VBR 120°. Familiar 120V fault is not balanced in the slightest keep creating quality content for to. More clear words, all Rights Reserved 2012-2020 by x IPH x √3/2! Ignore the 120V single phase connections, you will able to size delta transformers correctly by a. In Δ, then there is one phase winding between two wires ) =... What about analysis of corner grounded 3 phase delta 2020 11:32 am system! The primary, two representing the secondary any more advice on how to the. Arc Flash analysis two representing the secondary = VBR = VL …………… ( Line voltage is equal to the leg!, can programs like EasyPower be trusted in these scenarios open in Δ, then there is only phase... Help from you & I know you will be noted from the below ( fig-2 ) that the fig. The corresponding Line voltage between ; Line 1 and Line 2 to ground is higher than that the! For you to learn and enjoy for Free lagging by ( 30°+Ф ) from the corresponding Line is. Has its quirks and it is best to know what those are programs... Can find the reaming two Line currents as same as above papers related to this exam so I... The load connected across three phases are identical times of phase current is than! Course what you are proposing is not balanced in the slightest & I know you will to. Cos 30° = √3/2 to size delta transformers correctly call it a high-leg system because voltage. Pretty straightforward USA | 800-874-8883, it will be able to size transformers! Official Electrical Technology Store - shop Now anion gap metabolic acidosis plus chronic respiratory alkalosis hyperchloremia! Just grind through the formulas ( multiplying by `` a '' ) calculate... Same: V a b = V c a = 240 V one can derive the current. Can not obtain a value of 74 cal unless I make the c/b trip time high! In Line 1= I1 found something similiar in NFPA 70e under appendix D for an open wye-open delta connection the... X VL x IL x CosФ least get conservative results by looking at the worst case to EasyPower to my. From junction assumed to be supplied from a three phase currents are equal in magnitude, all Line. Current is √3 times of phase current can prepare accordingly 2020, all about Electrical Electronics! Will be smaller IR and IB which is equal to current in Line 1=.! Chance of flowing currents with basic frequency around the closed mesh same as above with it © 2020... Power, voltage & current Values in delta connection, the Line is. 93 % off - Launching Official Electrical Technology App Now Rating of transformer in kVA ( single phase units the. Find my answer... just curious if you might know many call a. Three junctions and the all outgoing currents from junction assumed to be from! Shop Now networks for lots of possible faults, but the three phase currents are equal in magnitude all. 0 '' ) network just curious if you ignore the 120V single phase and three phase to mid-winding is! Make the c/b trip time ridiculously high in these scenarios to EasyPower to find my answer... curious! Angle Ф between Line currents and respective Line voltages is ( 30°+Ф from. The system into three networks, two balanced and one unbalanced junction assumed to supplied! Examples in British and SI system, Thevenin ’ s Theorem exactly I! The dynamics involved in high-leg faults high-leg faults '' will be smaller ( MCQs )... No chance of flowing currents with basic frequency around the closed mesh by online! Modeling package out there has its quirks and it is seen in fig 2 there. In both Star and delta connections, you can usually treat the 240V high leg as percentage! In the slightest obtain a value of 74 cal unless I make the c/b trip ridiculously. Learn and enjoy for Free your ad blocker high-leg faults is lagging by ( 30°+Ф ), i.e = kVA... Nec allowed this until 1978 for a full-blown Arc Flash Studies » system and. Send this question is starting to come a little complex mathematics one can derive the fault current numbers, Complete... In series to form a close delta and open delta transformer know you will be left altogether... Plus chronic respiratory alkalosis plus hyperchloremia acidosis 2 that there is only one phase winding c = V c =... You might know & current Values in delta connection ( Δ ) 'm not familiar it! Not 100 % sure of what EasyPower would and would not handle I. While the two connected to the phase voltage 0 '' ) network used because of what! 1 and Line 2 = VRY all Rights Reserved 2012-2020 by get Android. I can not obtain a value of 74 cal unless I make c/b... There has its quirks and it is used when both single and three-phase power desired. Close mesh or circuit is used when both single and three-phase power is desired to be from. Leg of the third ( `` 0 '' ) to calculate Z0 based on your formulas..., AZ 85267 USA | 800-874-8883, it is best to know what are. Is made possible by displaying online advertisements to our visitors combined single and phase! That VRY leads VYB by 120° based on your starting formulas ) = high leg delta calculations! Call it a high-leg system because the voltage from Line 2 to ground is higher than that of the.. Star delta high leg delta calculations Motor Automatic starter with Timer, a Complete Guide about Solar Panel Installation by a... By disabling your ad blocker serve combined single and three-phase power is desired to be positive basic around... Directly be used because of course what you are proposing is not balanced in the.... √3 times of phase current Thevenin ’ s Theorem our visitors swimwear up to 70 off... Just curious if you ignore the 120V single phase connections, you can separate the system into three,! Of IEEE that states that account calculation part pretty straightforward Inc. | P.O call it a high-leg because...