We have received your request and will respond promptly. If you do not know that the ratio is you need to look on the nameplate or use a CT ratio tester to figure it out. It tells you what the multiplier will be in the circuit. What is Electric Current and how it relates to Metering. amzn_assoc_emphasize_categories = "2335752011,13900871,172282,1055398,16310091,228013";
Another thing that many people want to know is what is the current transformer sizing calculation. This page contains circuit type and wiring diagrams for all the form #'s of meters, sockets and pans; with and without CT's and PT's, for Wye, Delta, and Network. That is because a 400 amp meter is a self-contained meter and does not use CTs. 3 Phase Meter Base Wiring Diagram - Wiring Diagram Schemas wiringschemas.blogspot.com. Follow the link to find out more about this theorem. (adsbygoogle = window.adsbygoogle || []).push({});

0000004392 00000 n This meter is most commonly used in a 240v, single phase three wire service. 0000068655 00000 n This is the meter that most people will find on their homes. I hope you got what you were looking for! PTs are typically used in any installation where the voltage on the service is 480v or higher. <]/Prev 451627>> The reason is that CTs are most accurate at their nameplate values. Now, you must also consider the meter that is being used with the CT. Now most transformer rated meters are rated as Class 20 meters. I am in dilemma what is going wrong.
92 0 obj <> endobj Have the been tested and shown that they are no longer accurate? wiring diagrams circuit meter form metering types 3w 3p . Thank you , for this great review . IT Rated Single Phase (secondary CTs/PTs) Over 400A Form 4S Interval . I couldnt resist commenting. endstream endobj 96 0 obj <>stream amzn_assoc_tracking_id = "cts_pts-20";
Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action. The form 9s is most commonly used in a 4 wire wye service. The smaller black line connects to the voltage terminal in the form 9s meter socket and the. 0000003497 00000 n 11.0 4-Wire Circuits Metered with 2-Element Meters 11.1 Delta Connection at Test-block/switch. The single element meter must be approved as bi-directional or net meters. The other type of CT is known as a bar type CT. Bar type CTS have a buss bar that passes through the middle. I was wondering whether you can work out how many amps a supply is by knowing the CT ratio. The meter has two (2) dedicated CTs. Our monthly bills are the same as they have always been! The simple answer is the form 16s is used on self-contained services up to 200 amps and the form 9s is used on transformer-rated services with CTs. A wiring diagram is a simple visual representation of the physical connections and . Enough about CTs, lets talk about PTs. Multimeter diy repair?. General information. Again, what this means is that when the stated value of amps is flowing through the primary side of the CT, 5 amps is flowing through the secondary side. d(0}Gf82hG..>[i"s7#mnp clh(u9VBg}idQRj4Q~10^z]3d7Jmd c$B/7 (adsbygoogle = window.adsbygoogle || []).push({});
Form 4s. amzn_assoc_enable_interest_ads = "true";
xref Another thing that companies are also adding on are charges for their renewable energy portfolios. The short answer is yes but I have sent you an email. Halving the multiplier provides the average of the two leg currents. Web Form 3S * Use The Ct Ratio In Determining The Meter Multiplier. This also depends on the policies and procedures of the utility. There are several things you can check but the first is to examine your bill carefully and check the rate you are on. %%EOF 0000001075 00000 n Many people want to know what is a current transformer and potential transformer. What would be the best way to meter this using CTs? To properly size CTs it is important to know what the actual connected load will be. A 240 volt meter is used for 277/480V service. My questions are: So I know that the CT ratio is 500:5 and its a 3 phase 4 wire supply 3 x 230/400V. currently has 3 1000:5 CTs and 2 480:120 PTs. There is no difference for the customer as they still see 120v. amzn_assoc_ad_mode = "auto";
How would we calculate the voltage induced into the secondary circuit? If the wire diagram is larger than the wire, use only approved adapters. While other utilities do not. Im assuming the PT can be just duplicated to both meters, but how do we duplicate the CT without adding another set of CTs? Web form 3s meter wiring diagram enginepartdavid.z21.web.core.windows.net. You take the PT ratio and multiply it times the CT ratio. The form 2s is by far the most common meter form out there. Wiring ge diagrams diagram meter form metering 3p 4w circuit transformers type. 6. CTs tend to lose some of their accuracy at lower amp levels. Wiring diagrams Click here for a form 2s meter wiring diagram. The short answer is yes. Here is the wiring diagram for the form 16s meter. For example, some utilities require anything over 480v to be transformer-rated. PTs are potential transformers. 136 0 obj <> endobj This feature allows you to use a form 9s meter in a 4 wire delta service. Web the current wire connects to x1 on the ct. Wiring meter diagram form 9s diagrams delta metering 3p circuit bay 4w. 0000012484 00000 n 0 amzn_assoc_marketplace = "amazon";
Web the form 4s meter is a transformer rated, also known as a ct meter, and is typically installed on large residences who have 400 amp or larger services. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Learn how your meter works and save on your power bill. being this is a 5S we are only measuring phase A & C. Any idea why multiplier on old meter is 100? The Great Lakes Electric Meter School (GLEMS) began in 1989 with a committee composed of members of electric utilities, electric utility manufacturers, and experts in the utility field. The first thing that you want to do is find out your electric rate as this will have the information you need to calculate your bill. You have touched some fastidious things here. They should be able to guide you on what your options are. Form 11S, 39S, 76S. 3 phase 3 wire delta. I stumbled upon your blog the usage of msn. hbbd``b`$N H@#@e . H[2012H@ rated installation and make all secondary wiring connections to the meter. amzn_assoc_placement = "adunit0";
Sounds like a 3 phase 3 wire delta service that would typically use two CTs and possibly two PTs depending on what voltage you want in your meter base. This meter is most commonly used in a 240v, single phase three wire service. Form 9s. Meter Form Drawings, provided by Durham Company.
Photo 2. This can help you troubleshoot problems that come from the billing or meter reading department without even leaving the office. %PDF-1.5 % The meter multipliers are calculated the same way. (120/240V or 240/480V) Meter rated 240 or 480 volt using line-to-line voltage. form 3s meter wiring diagram Wiring Diagrams - Bay City Metering NYC. hJBQ9L^7|1 \} % A form 16s meter is a self-contained meter and a form 9s meter is a transformer-rated meter. Good day! Form 2s. Just wanted to tell you keep up the fantastic work! Normal family copper wiring is AWG number 12 or If you still need V circuits, you will have to wire the Neutral wire to the panel box where V AC is available between any Hot wire and a neutral wire, whereas V single phase is available between two hot wires. amzn_assoc_ad_mode = "auto";
They can also be used for three wire single phase services as well as single phase primary metering. Third, and probably the most complicated, is that the register ratio on the mechanical meter warranted a multiplier of 100. for any new IT-rated installation and make all secondary wiring connections to the meter. For example, you would not want to place 200:5 CTs in service that you know will be pulling 1000 amps on the primary side. 0000004125 00000 n Is there a particular reason they want to replace the CTs? amzn_assoc_emphasize_categories = "13900871,172282,16310091,228013";
. Having the multiplier on the meter in the field is just a way for meter technicians to have a quick way to verify multipliers. All diagrams are presented in JPEG (.jpg) format. This is actually the formula to find the maximum ampacity of transformers. Form 5S Meter - VT. Form 6S Meter - No VT. Read why you should be using PTs here. 277/480V Three Phase 4-wire Over 60KW Form 16S Interval. Just make sure that you are using equipment that is rated for the voltage and current on the circuit and that you are wearing all necessary personal protective equipment necessary. Form 2s. form 3S, 4S, 9S, 36S, 45S, 56S, 10A, etc.) Let I have a energy meter and I dont have information regarding its C.T ratio configuration, then what should I do? It is of great help . Web the current wire connects to x1 on the ct. It is available as an energy meter with an LCD register. We have a standard 3ph and N supply.since the power Co installed a new smart meter our bills have almost doubled. (adsbygoogle = window.adsbygoogle || []).push({});

If you install 200:5 CTs on a 400 amp service then as long as the rating factor of your CTs is at least 2 you should be able to meter the service properly. If the CT ratio is 200:5, then the meter multiplier is 40, which is simply 200/5. Normally the utility supplies the CTs as well. Meters are rated 240 or 480 volt respectively. They are also called VTs or voltage transformers. They are used to step down the voltage to a safe level so that it can be metered. It depends on the voltage of the transformer. So, if that particular service were to have 800 amps on it, there would 20 amps coming out of the secondary side of the CT and in the meter base. Web this diagram shows how to wire it for v. The smaller black line connects to the voltage terminal in the form 9s meter socket and the. what is the effect of using a ct with ct ratio lower than that of the load to be metered? There are a variety of form numbers that are used. Web form 3s meter wiring diagram wiringdiagram.z21.web.core.windows.net. Web here is a wiring diagram for the form 9s meter. The smaller black line connects to the voltage terminal in the form 9s meter socket and the. waross (Electrical) 8 Jan 19 00:17. Beyond that you can use an ammeter. Meter Connection Diagrams. 3 phase meter base wiring diagram For 100 amp meters, use #2 wiring (or in accordance with standard utility operating practices) The PT secondary circuit is shared with relays (wye-grounded for relays). (adsbygoogle = window.adsbygoogle || []).push({});

My running load is around 110 HP and my bill comes very high compared to other plants who have the similar machines. Wiring diagram 12s form meter phase base delta service diagrams wire metering network meters power. They are both used on the same service type. LOAD . Formerly you would have used an 8s meter because of the high-leg. Use the CT ratio times the PT ratio and you have your multiplier. CT rated meters are also typically demand meters as well. _g7bDwCh o7d=HhF8Y}K]se~^Cj=vxd amzn_assoc_region = "US";
As an option, the meter is available with interchangeable personality modules, including demand, time-of-use (TOU) and load pro le. Old meter has a tag on it that states multiply by 100. Form 4S Meter. ALL NEUTRALS MUST RETURN TO A COMMON, SINGLE SOURCE . FORM 3S * Use the CT ratio in determining the meter multiplier. Web the form 16s meter is typically used to meter the 4 wire wye service. However, an untrained eye may not catch this difference and install a form 2s meter by accident. form 3s meter wiring diagram. . Form 4S 3 Wire Using CT's 2 or 3 Element Meter Wiring Diagrams .
Form 3S Meter - 3 Wire. *Eng-Tips's functionality depends on members receiving e-mail. Our hydro supplier never took actual meter reading for 21months and recalculated and sent a bill for 24k$!!! (adsbygoogle = window.adsbygoogle || []).push({});
CTs, or current transformers, and PTs, or potential transformers are used in metering to step down current and voltage to safer and more manageable levels. Voltage is measured leg to leg. Wiring diagrams meter form circuit 1p 2w metering. Click on the type or form you need and download the jpg to your computer or printer. Web 12s phase form meter diagram wiring 120 single fm 480v socket ge 200 amp 208v 120v 200a 3ph terminal ct. 0000064912 00000 n When CTs and PTs are used in a metering installation, the installation is known as being transformer-rated. 0000001620 00000 n This model is also available with a 57 - 120V auto-ranging power supply for low voltage applications or a 600V power supply for 3-phase 3-wire 600 volt distribution applications. Wiring Diagrams - Bay City Metering NYC www.baycitymetering.com. f:@ C0Q If so, you can correct it. The form 2s is by far the most common meter form out there. Hey There. This is important because we want to size our CTs so that they are fully saturated. (adsbygoogle = window.adsbygoogle || []).push({});
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what happens if CTs of 200 ams installed to a 400amp meter and vice versa. I am always here to help. 2800 Duncan RoadLafayette, IN 47904 U.S.APhone: 765.742.1001 Tech Support: 800.777.2774FAX: 765.429.0936 msd wiring diagram step 7al three module selector instructions basic figure. The form 2s is by far the most common meter form out there. wiring diagrams meter form circuit 1p 2w metering, wiring delta diagrams 3p circuit meter form metering types services 4w, phase diagram wire wiring 480v electrical meter energy kwh colors metering panel connection ekm 240v 200a box bms fasa voltage, wiring meter diagram form 9s diagrams delta metering 3p circuit bay 4w, wiring diagram 12s form meter phase base delta service diagrams wire metering network meters power, meter wiring diagrams diagram phase circuit 4s kwh form base metering 3w submetering services 1p bay, meter form wiring diagram 9s amp metering diagrams circuit bay service electrical base 3w 3p nyc diagramweb, Meter form wiring diagram 9s amp metering diagrams circuit bay service electrical base 3w 3p nyc diagramweb. to learn how to make power in your own backyard from a Stirling engine! My electricity is 3phase smart meter, 8000 khw,3 * 230 / 400 v, 3*5 amp,my consumption per month is always less when I read the meter, how can I work it out to be accurate? What is the difference between voltage and current? Yes you can use more than one meter on one set of CTs as long as you do not go over the burden rating of the CTs. I know of a utility that had a billing system that would only accept multipliers as a 1, 10, 100, etc. If the bill was 10-15% high, i can understand but its coming more then double compared to others. Some typical PTs are 2.4:1 and 4:1. "Why not the best?" Can you recommend quality + value make/model CTs and VTs for implementing a Schweitzer 735 meter to a 550V 3-ph ungrounded wye circuit carrying 1000A. When 200 amps are flowing through the primary side of the CT, 5 amps are coming out of the secondary terminals. If you go the other way and install 400:5 CTs on a 200 amp service then you will most likely lose some revenue. amzn_assoc_enable_interest_ads = "true";
I will now look closer at PTs next time I am working in a metering cabinet Cheers, 2kw-hr power read from (present minus prev.) MAERICH www.maerich.com. This meter form violated Blondel, but provides good accuracy when the two leg to neutral voltages are balanced. Already a member? The wire running backwards cancels itself out so as not to add to the amount of current registered from the spades. The longer answer is that while it is possible, I advise against it. If you are asking if you can install 200:5 CTs with a 400 amp meter then no. I sent you an email. Here is a wiring diagram for the form 4s meter. Required fields are marked *. Eckhard Bick - PDF Free . Form 12s meter wiring diagram. Wiring diagrams. Also, many utilities decided to convert many of the 120v services to 240v just so they could install a 2s meter. Dear sir Pls send me mail also the answer of calculate the standerd size of CT. Whats the math on CT metering on the spades in a 3 phase pad 120/208 with 200:5 CTs if running conductors back thru the CTs to meter another service? Here is the wiring diagram for the form 16s meter. Form 3s. Close this window and log in. The difference between the two is that that the transformer-rated service uses CTs whereas the self-contained service does not. amzn_assoc_default_category = "Tools";
wiring metering diagram ct diagrams meter nyc circuit form 3w 1p bay, wiring ge diagrams diagram meter form metering 3p 4w circuit transformers type, meter phase wiring diagram socket jaw wire electric base amp 200 service electrical waterheatertimer delta pole neutral mobile needs box, wiring diagrams circuit meter form metering types 3w 3p bay services, msd wiring diagram step 7al three module selector instructions basic figure, Wiring diagrams. The form 9s is most commonly used in a 4 wire wye service. Hey there! Watthour meter information. Close, it would actually be $2880. A form 1s meter a meter that was commonly used in single phase, 120v two wire services. 0000066266 00000 n 5. Power companies have a couple of different ways of putting the muliplier into their billing systems. 0000001174 00000 n Click Here! Click here to view and print the full size diagram. Single Phase Three-wire with CT N 2 120 volts line-to-neutral240 volts line-to-line Line Neutral or Set meter potential stabat 6 o'clock or 9 o'clock position, to matchsocket connection. CT's, or current transformers, and PT's, or potential transformers are used in metering to step down current and voltage to safer and more manageable levels. Like us on Facebook and get all the updates. This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. 14 Images about Wiring Diagrams - Bay City Metering NYC : Wiring Diagrams - Bay City Metering NYC, House Wiring and also 3 Phase Meter Base Wiring Diagram - Wiring Diagram Schemas. 0 This field is for validation purposes and should be left unchanged. The rating factor means that the CT is capable of handling more than its nameplate value. Meter rated 120, 240 or 480 volt. Unfortunately this could absolutely be correct. General Electric (Thomson) / Aclara Technical Info. Form 12s. 0000040663 00000 n Now, to find the correct current transformer size for a three phase service we use this current transformer sizing calculation. Click Here! You will also need to keep in mind that you may have demand charges, base facilities fees and taxes. The reason that they are needed is that either the current and/or voltage of the service to be metered is too high. Now that we know what CTs and PTs are, we can talk about meter multipliers. Web external meter wiring should be consistent with the meter class rating. In this situation there is a billing problem. Example: Primary Metering for 3-phase, Delta connection Will use 3 each Potential Transformers rated at 14,400 V. & 3 each Current Transformers rated at 400:5 amps. diagrams dated 05/19/2021 Note: This version supersedes previous versions of these guidelines . Or alternative? This is the meter that most people will find on their homes. With and without ct's and pt's, for wye, delta, and network. Itron/Schlumberger Technical Info. Great information, thank you. hZzRBo{wfy5#Y|*{T*p&[s.V[f'~I_guF.=?n+_?x,sG2aGe!`;'2aq_qoOdK0q]&y)*{MIRC_ * m8eW|`ve> o?`]W N The form 16s is normally used on services up to 200 amps and the form 9s is used on services greater than 200 amps where CTs are required. Some CTs have a rating factor of 4, 3, 2, or 1.5. Furthermore, you no longer need to to carry a 120v 12s and a 240 12s meter. We also know much about CTs and meters because of Blondels Theorem. The meter is often installed on straight three-phase services when no neutral wire is used. Already a Member? Does this tell me how many amp supply it is? FLEXIBLE PLATFORM As an example, if you had a 120/208 4 wire wye transformer feeding a building and you had a customer that only wanted single phase, you could pull two legs and the neutral off the the transformer to get the single phase. 6- Terminal. Assuming we have a 120/208 supply, and a 200:5 CT. Would it remain the same @ 120v/line? Required fields are marked *. They can be used on 3 wire delta three phase services as well as single phase services that are pulled off of a three phase transformer. AMR Retrofit Smartmeter Boards for Watthour Meters. Transformer-rated services run in parallel with the service. This page contains circuit type and wiring diagrams for all the form #'s of meters, sockets and pans; with and without CT's and PT's, for Wye, Delta, and Network circuits. This meter is also used in a 4 wire delta service, also known as a high-leg service. Hi I need to replace a meter of a transformer (the secondary side) The secondary supplies a 450v 3 phase load, the secondary side of the transformer has no neutral. Unbalanced loads cause slightly unbalanced line to neutral voltages, resulting in slight metering errors. Rating of CTs is 600/5 and we are using multiplier of 120. Halving the multiplier provides the average of the two leg currents. Form 6S, 8S, 9S,. 254 0 obj <>stream The existing meters seem to use 2 CTs and only 2 voltage supplies, there is no access to the meters. They are both typically used on a 4 wire delta service type. %PDF-1.7 % Web 12s phase form meter diagram wiring 120 single fm 480v socket ge 200 amp 208v 120v 200a 3ph terminal ct. Wiring Diagrams Circuit Meter Form Metering Types 3P 3W Bay Services. The utility might have a tariff requirement that they obtain an actual reading at least once a year or at least once every 12 months. So, when the meter is pulled out of the meter socket the power to the service will go off. Your email address will not be published. Thanks for response, and confirms my thoughts. HW]58kq-j>&$$;Y]n`oPk(co/O??|>m?>>>}|yon`~}]-. Form 5s meters are transformer-rated meters that can be used in a variety of different service types. Most transformer-rated meters today are class 20 meters. I love the information on your website. They say that our old CT rating was 200:5 and they have changed this to 400:5. and we have been substantially under paying. What this means is that the manufacturer says the CT is accurate beyond its nameplate value. Form 12s meters are self-contained meters that can be used on a few different services. . 1 3. amzn_assoc_fallback_mode = {"type":"search","value":"electrical"};
This can actually be desirable depending on the rating factor of the CT. 0000001585 00000 n This meter form violated Blondel, but provides good accuracy when the two leg to neutral voltages are balanced. Thanks, if there are any topics that you would like to see that are not on here, please let me know. Wiring Diagrams - Bay City Metering NYC. amzn_assoc_fallback_mode = {"type":"search","value":"current transformer"};
204 0 obj <>/Filter/FlateDecode/ID[<27E71E4DD3AF519194AA624668837BFC><4BC72A2DEF7F7A43B36BEB11F5CFB485>]/Index[136 119]/Info 135 0 R/Length 252/Prev 444208/Root 137 0 R/Size 255/Type/XRef/W[1 3 1]>>stream Metergod Monday - Form 6S or 36S installed on a Form . Any way keep up wrinting. Web this diagram shows how to wire it for v. This meter is most commonly used in a 240v, single phase three wire service. I sent you an email. Form 4s 3 wire using ct's 2 or 3 element meter wiring diagrams. Meter Base Wiring. What is the difference between voltage and current? The power company does not want you to know this secret about generating your own power! 120/240V Single Phase 3-wire Under 60KW Form 2S Scalar . Form 3s meter wiring diagram. Demonstration to wire a Single Phase, FM 2S, 240V, 200A, 3 Wire, electric meter for a 120V, 2 Wire Service. 4. If the CTs are to be placed in a pad mount transformer or on the pole and there is only one service coming off of those transformers, it is best to size the CTs to handle the maximum amps that the transformer is good for. Wiring diagrams circuit meter form metering types 3w 3p bay services. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Form 9s. They should be the same. Where would you use a 16s meter vs a 9s meter? Here are the most common and the most common service types that they are used in. We had to pay it or we wouldve got cut off. In this case no billing error should be present and you can just correct the multiplier in the field. Meter Enclosure - A device which houses a Meter Socket and line and load (45S). Web updated on february 9, 2022. hmS6?A^M$+3sL$0$R^8H|ulc@l\a:Ykv;3C&}IL{PbO-f 7 Pictures about Wiring Diagrams - Bay City Metering NYC : Wiring Diagrams - Bay City Metering NYC, Form 12s Meter Wiring Diagram - Learn Metering and also Wiring Diagrams - Bay City Metering NYC. That would mean 400:5 = 80 x 120 = 9600. How to Calculate the Full Load Ampacity of a Transformer, Buy all Sell all Renewable Energy Metering, Edison and the Electric Chair: A Story of Light and Death A Review. If a service has both CTs and PTs then the two values are multiplied together to give the billing multiplier. Further to Stevenal's explanation; The standard residential meter also uses the line to line voltage and makes a similar assumption that the line to neutral voltages are equal. The FOCUS AX Polyphase meter contains a 120V to 277V auto-ranging power supply suitable for both 277/480V, 4W, WYE and 240/480V 4-wire Delta Services. (One phase may or may not be grounded.) Form 3S Meter - 2 Wire. 12470 3 phase 4 wire high side diagram wiringmanualpdf.blogspot.com. The other is transformer-rated. The CT is connected so that it will add the negative of one leg to the positive of the other. It is normally available as a 120/208v service, or a 277/480v service. Thanks for that post. Jimmy Carter. Also further your career as a meter tech or lineman by learning more about how meters work. This is a transformer-rated meter and will not interrupt the customers service when pulled. (120/208V or 277/480V) Meter rated 120 or 277 volt using line-to-ground voltage. This is a transformer-rated meter that would be used when the service is too large to put in a form 2s meter. Regards.. No problem. '#wB7`*> The application is measuring power on a wye-grounded side of transformer. This form is also used for many small businesses as well. 7 Pictures about Wiring Diagrams - Bay City Metering NYC : Wiring Diagrams - Bay City Metering NYC, Form 12s Meter Wiring Diagram - Learn Metering and also Wiring Diagrams - Bay City Metering NYC. Form 12S meter Key Points for Metering. So, what do CTs do? This form of metering is not permitted for VA-hour measurement nor for . 118 0 obj <>stream Bill I have sent you an email with the details. Also, I would like to add that with the invention of the solid state meter came a feature known as auto-ranging. The same applies to the form 16s. Why Choose Primary Metering Over Secondary Metering? ABB, Peak Demand, and Ritz all make good CTs and VTs. Could this be correct? I recommend against this practice for the safety of the meter tech or lineman who may need to install or remove these meters from service. Blondels Theorem is typically used to determine what type of meter to install in each different type of service. ,@ Sa34f0i\FP I want to duplicate the pq meter with a ISO compatible meter due to requirements of the utility for generator metering. hi, We have a 3 phase machine with 100KW load capacity installed what CT ratio energy meter will best suit the requirement .
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