2800 Duncan RoadLafayette, IN 47904 U.S.APhone: 765.742.1001 Tech Support: 800.777.2774FAX: 765.429.0936 Here is a form 12s wiring diagram. With this information we can then size the current transformers based on the information that is given. Second, the wrong multiplier was put on the meter in the field but the correct multiplier was entered into the billing system. The other type of CT is known as a bar type CT. Bar type CTS have a buss bar that passes through the middle. 106 0 obj <>/Filter/FlateDecode/ID[<5FF6751BA288250001D9A981D96A412A><4C9124A86FC67D45AA2F3B9DCE0008BF>]/Index[92 27]/Length 80/Prev 332449/Root 93 0 R/Size 119/Type/XRef/W[1 2 1]>>stream 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. wiring diagrams circuit meter form metering types 3w 3p . When 200 amps are flowing through the primary side of the CT, 5 amps are coming out of the secondary terminals. If the wire diagram is larger than the wire, use only approved adapters. There are CTs installed at my place but i strongly suspect there is something wrong with the connections of the CTs or with the meter. FLEXIBLE PLATFORM H1 X1 . There are three (3) PTs (wye-connected primary). This is a transformer-rated meter that would be used when the service is too large to put in a form 2s meter. :_DeMH"U#sD0GJWH4K&BC|eZaC(-TYqitgHkq|tib,Gm( kdUV.x"CT|\o;yRCt4Pps~W.Kf*K%'C*1lDb{jy?U@>pNQ+RM)5fE+_Z~GsCPw bsKV@*c[V=Z{{SZI[=~mYtvog 277 volt meters have 277V nameplates and are calibrated at 277V. Form 3s. 0000001620 00000 n The PT secondary circuit is shared with relays (wye-grounded for relays). <]/Prev 451627>> Meter Connection Diagrams. %%EOF You do not want to overdrive the meter by placing more than 20 amps in the meter base because you sized the CTs incorrectly. form 3S, 4S, 9S, 36S, 45S, 56S, 10A, etc.) Also, if you are using a 400 amp meter you have no need for CTs that are rated for less 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. Does this tell me how many amp supply it is? odd one.. We are replacing an old analog 5s meter with a new AMI meter. Exceptionally well written! I am assuming that you 120:1 PTS. Please let us know here why this post is inappropriate. External meter wiring should be consistent with the meter class rating. With and without ct's and pt's, for wye, delta, and network. . Web the form 16s meter is typically used to meter the 4 wire wye service. Assuming we have a 120/208 supply, and a 200:5 CT. Would it remain the same @ 120v/line? You will also need to keep in mind that you may have demand charges, base facilities fees and taxes. They can be used in anything from a 4 wire wye service to a 3 wire delta service. You will be better off if you meter each tenant separately. HW]58kq-j>&$$;Y]n`oPk(co/O??|>m?>>>}|yon`~}]-. The CENTRON Polyphase CP3S solid-state meter with current transformer technology measures extendedpolyphase energy consumption. 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. Hey there! Meter Form Drawings, provided by Durham Company. What is the difference between voltage and current? I was wondering whether you can work out how many amps a supply is by knowing the CT ratio. Form 12S meter Key Points for Metering. IT Rated Single Phase (secondary CTs/PTs) Over 400A Form 4S Interval . This meter is most commonly used in a 240v, single phase three wire service. %PDF-1.5 % Form 3s. Wiring diagrams circuit meter form metering types 3w 3p bay services. Furthermore, you no longer need to to carry a 120v 12s and a 240 12s meter. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Click Here! First, and I would say most common, is that the multiplier was just wrong because of human error. form 3s meter wiring diagram. Itron/Schlumberger Technical Info. 120/240V Single Phase 3-wire Under 60KW Form 2S Scalar . endstream endobj 93 0 obj <> endobj 94 0 obj <> endobj 95 0 obj <>stream Form 9s. what happens if CTs of 200 ams installed to a 400amp meter and vice versa. (adsbygoogle = window.adsbygoogle || []).push({});
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how can we know the standard CT to be install. Electric power & transmission & distribution Forum, Low-Volume Rapid Injection Molding With 3D Printed Molds, Industry Perspective: Education and Metal 3D Printing. When the core of the CT is fully saturated it is the most accurate. waross (Electrical) 8 Jan 19 00:17. Like us on Facebook and get all the updates. 53 S.20O+8*3z6IlO|S\9IT.>v{R %}]u:q1y^WYlrb$ycfa er87Y_BR.rNY&N{i>4*W NzP!,.i_R ^#mg6/h>Q}=x\'S8`&A]F98LkKl/PSg{COv\IJbru+;/v. Form 5s. _g7bDwCh o7d=HhF8Y}K]se~^Cj=vxd Web msd wiring diagram step 7al three module selector instructions basic figure. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. Some CTs have a rating factor of 4, 3, 2, or 1.5. Eckhard Bick - PDF Free . Many people want to know what is a current transformer and potential transformer. Normally the utility supplies the CTs as well. 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. Metal 3D printing has rapidly emerged as a key technology in modern design and manufacturing, so its critical educational institutions include it in their curricula to avoid leaving students at a disadvantage as they enter the workforce. Auxiliary Equipment. This is because 40 x 2.4 = 96. 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.) You will want to verify that the multiplier is correct on your billing system and that the bill is being calculated correctly. Halving the multiplier provides the average of the two leg currents. 0000066266 00000 n Would it be 2 CTs and 3 voltage connections or 3CTs? 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? 277/480V Three Phase 4-wire Over 60KW Form 16S Interval. They can also be used for three wire single phase services as well as single phase primary metering. amzn_assoc_region = "US";
Enough about CTs, lets talk about PTs. 0000000696 00000 n 0 Am I able to power up two tenancies off one CT? %PDF-1.7 % amzn_assoc_emphasize_categories = "13900871,172282,16310091,228013";
. 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. See the wiring diagrams beginning on page 3. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Learn how your meter works and save on your power bill. Required fields are marked *. Form 3s meters are typically used for single phase two wire services where the service is so large that it requires CTs. PTs are potential transformers. You will need to make sure that you are reading the meter on the same days that the company is reading the meter. Also, many utilities decided to convert many of the 120v services to 240v just so they could install a 2s meter. This is the meter that most people will find on their homes. to learn how to make power in your own backyard from a Stirling engine! I hope that I am understanding your question correctly. rated installation and make all secondary wiring connections to the meter. Web msd wiring diagram step 7al three module selector instructions basic figure. A form 3s meter uses one CT. (adsbygoogle = window.adsbygoogle || []).push({});

Hi just want to know i installed 3 600amp meters on a 3 ph disel genarator the amp meter tels me when i use a 220v grinder its pulling 150amps must i install cts if so what size will work. If your PT ratio is different you would need to use that ratio instead of 120 and multiply it times 80. my ct/pt is 1/1A but i m using meter with Ib 5A are they compatible. In this situation there is a billing problem. Close, it would actually be $2880. The difference between the two is that that the transformer-rated service uses CTs whereas the self-contained service does not. amzn_assoc_linkid = "118ead0c5b232e5b6984cd40c9021651";
m8eW|`ve> o?`]W N If ct ratio is 600/5 and meter ratio is /5. I am always here to help. The single element meter must be approved as bi-directional or net meters. That is because a 400 amp meter is a self-contained meter and does not use CTs. 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. There is not too much detail to go into. MAERICH www.maerich.com. The existing meters seem to use 2 CTs and only 2 voltage supplies, there is no access to the meters. Halving the multiplier provides the average of the two leg currents. Metergod Monday - Form 6S or 36S installed on a Form . 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. The short answer is yes but I have sent you an email. Here are the most common and the most common service types that they are used in. Here is the wiring diagram for the form 16s meter. 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. 0000001075 00000 n We also know much about CTs and meters because of Blondels Theorem. 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. 4. This feature allows you to use a form 9s meter in a 4 wire delta service. The meter has two (2) dedicated CTs.
General information. For 100 amp meters, use #2 wiring (or in accordance with standard utility operating practices) Sir plz tell me about window current transformer. This meter is also used in a 4 wire delta service, also known as a high-leg service. Transformer size is 150 KVA/415V. ROUGHRIDER ELECTRIC COOPERATIVE . %%EOF Wiring diagrams meter form circuit 1p 2w metering. Photo 2. 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. 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. The meter is often installed on straight three-phase services when no neutral wire is used. Why Choose Primary Metering Over Secondary Metering? A form 1s meter a meter that was commonly used in single phase, 120v two wire services. Required fields are marked *. Is C.T ratio is considered while installing a energy meter? (One phase may or may not be grounded.) I have sent you an email. Revenue grade CTs are engineered to produce 5 amps when the amps on the service are at the rated value. as 1000/5 = 200 and 480/120 = 4 200*4=800. The meter multipliers are calculated the same way. msd wiring diagram step 7al three module selector instructions basic figure. What is the Multiplier ? -------------------- Elster / ABB Technical Information. Meter Enclosure - A device which houses a Meter Socket and line and load (45S). So, what do CTs do? f:@ C0Q 3^,cVf 1.iOk. PTs are typically used in any installation where the voltage on the service is 480v or higher. I have sent you an email with the details. 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. This is all done by a human and sometimes we get things wrong. If there are any other questions that you may have please let me know. Another thing that companies are also adding on are charges for their renewable energy portfolios. The best way to do this is to consult with the engineer. (adsbygoogle = window.adsbygoogle || []).push({});
Form 4s. It tells you what the multiplier will be in the circuit. Advanced WEB Strategies, Track 1: Introduction to Single-Phase Electric Meter Installations, Track 2: Introduction to Polyphase Electric Meter Installations, Track 3: Application and Design of Electric Meter Installations, Track 4: Advanced Metering and Communications, Track 5: Field Testing of Distribution Controls, Track 7: Leveraging Technology to Improve Utility Efficiencies. Meter Form wiring diagrams. If you are asking if you can install 200:5 CTs with a 400 amp meter then no. The reason being that many homes that used this type of service converted to 240v either because they upgraded or because they were forced to by their utility. This form is also used for many small businesses as well. This means that there is a hole in the middle to pass the wires through. amzn_assoc_marketplace = "amazon";
For example, a 200:5 CT that has a rating factor of 4 will accurately measure a service up to 800 amps. The most important things to note on the nameplate are the ratio and the rating factor. 0000064912 00000 n Most transformer-rated meters today are class 20 meters.
Form 4s meters are used for single phase three wire services with two CTs. However, an untrained eye may not catch this difference and install a form 2s meter by accident. The most common use for the 1s meter now is for sign services which only require 120v. The form 2s meter wiring diagram. ,@ Sa34f0i\FP 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. Thanks for that post. 136 0 obj <> endobj Window type CT is a term used to describe the CT. Meaning that we want a 200:5 CT to be sized so that the amps flowing through the primary side has as close to 200 amps as possible. Kindly explain in detail. Now, to find the correct current transformer size for a three phase service we use this current transformer sizing calculation. amzn_assoc_emphasize_categories = "2335752011,13900871,172282,1055398,16310091,228013";
0000065589 00000 n By utilizing our experience and technology with that of our strategic allies and development partners, we provide metering solutions that cover the range of utilities' commercial and industrial metering needs. amzn_assoc_region = "US";
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. This is best described with an example. Blondels Theorem is typically used to determine what type of meter to install in each different type of service.
If so, you can correct it. Already a member? I hope you got what you were looking for! Without reading the nameplate it is hard to distinguish the difference. Form 2s. For instance, if I had an order that said that the display was out on the meter and the multiplier was 160, I would go ahead and take a 4:1 PT out in the field with me because more than likely it has gone bad. Form 5s meters are transformer-rated meters that can be used in a variety of different service types. hmS6?A^M$+3sL$0$R^8H|ulc@l\a:Ykv;3C&}IL{PbO-f My running load is around 110 HP and my bill comes very high compared to other plants who have the similar machines. 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. (120/240V or 240/480V) Meter rated 240 or 480 volt using line-to-line voltage. While other utilities do not. This makes no sense to me. 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. amzn_assoc_enable_interest_ads = "true";
The form 2s is by far the most common meter form out there. Here I will try to demystify the CT PT confusion. Author: Deborah Zillich Created Date: My advise would be to contact your utilities commission. 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. This does two things, one, it makes sure that your CTs are never overloaded and two, it is a way to find overloaded transformers. Just like if you were to have a two wire secondary service. There are just no wires connected to one of the load side terminals of the meter base. This can help you troubleshoot problems that come from the billing or meter reading department without even leaving the office. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action. Use the CT ratio times the PT ratio and you have your multiplier. Meter multipliers are used when meters are installed in transformer-rated installations. 5. I know that I said before that you should consult with the engineer and you should but the formula that we use for current transformer sizing for a single phase transformer is:
If the bill was 10-15% high, i can understand but its coming more then double compared to others. Web external meter wiring should be consistent with the meter class rating. Form 11S, 39S, 76S. hbbd``b`$N H@#@e . H[2012H@ %PDF-1.5 % This means that the current coils inside the meter are rated to carry a continuous 20 amps. amzn_assoc_tracking_id = "cts_pts-20";
Here is the wiring diagram for the form 16s meter. Wiring diagrams This meter is most commonly used in a 240v, single phase three wire service. Here is a wiring diagram for the form 4s meter. 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. It depends on the voltage of the transformer. Click here for a form 2s meter wiring diagram. This meter is most commonly used in a 240v, single phase three wire service. 5-Jaw Meter Socket 2-WIRE METER FORM 3S Pierce Pepin Cooperative Services Form 3S Wiring Diagram Revised: February 16, 2016 X1 X2 H1 H2 LINE NEC: Article 90(B)-5 Utility metering is not covered by the Code NOTE: CT X2 must be grounded either in the meter socket or the CT enclosure but NOT at both ends. This means that their current coils are rated at 20 amps. They had to specifically order their meters with the correct register ratio so there was some math involved. form 3s meter wiring diagram Wiring Diagrams - Bay City Metering NYC. Why Does it Seem Like my Power Bill Keeps Going Up? To properly size CTs it is important to know what the actual connected load will be. Another thing that many people want to know is what is the current transformer sizing calculation. 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. For example if a service has 200:5 CTs and 2.4:1 PTs, the multiplier will be 96. Here is a wiring diagram for the form 9s meter. The wiring diagrams within this document represent standard conceptual designs for commonly used service it rated. The form 2s is by far the most common meter form out there. Meter 2s wire phase single. Before auto-ranging a 15s meter was used to properly meter a 4 wire delta service. Web form 3s meter wiring diagram wiringdiagram.z21.web.core.windows.net. Unfortunately this could absolutely be correct. The form 9s is most commonly used in a 4 wire wye service. They are used to step down the voltage to a safe level so that it can be metered. You should be able to see their tariff (rules and regulations governing that particular utility) are online. 0000009835 00000 n (adsbygoogle = window.adsbygoogle || []).push({});

Meter Base Wiring. Thanks, I hope I have helped. currently has 3 1000:5 CTs and 2 480:120 PTs. This allows you to bolt wires to them. A 240 volt meter is used for 277/480V service. I am sorry, I am in the States and I do not know of any suppliers in NZ or AUS. 12470 3 phase 4 wire high side diagram wiringmanualpdf.blogspot.com. By joining you are opting in to receive e-mail. Now that we know what CTs and PTs are, we can talk about meter multipliers. The reason that I recommend using this meter for only one service type is that when you go through your billing system and start looking for errors, you will be able to tell based on the multiplier what service type is in the field as well as have a clue about the voltage. endstream endobj startxref Great information, thank you. Hey, I will need some more information from you. The smaller black line connects to the voltage terminal in the form 9s meter socket and the. amzn_assoc_fallback_mode = {"type":"search","value":"current transformer"};
There are a variety of form numbers that are used. This meter form violated Blondel, but provides good accuracy when the two leg to neutral voltages are balanced. hb`````b`c`p2cb@ !fvUd) \bl p) ) H;3X~ykD'l>(4%BM&2cRtIg46kL Some people refer to the meters that use a CT PT combination or just CTs as a current transformer meter. The wire running backwards cancels itself out so as not to add to the amount of current registered from the spades. The reason is that CTs are most accurate at their nameplate values. I read your email also, very informative with fitting example. CT rated meters are also typically demand meters as well. 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. The most common use for this meter and the only one that I recommend using for new installations is in a 3 wire delta service. trailer If you go the other way and install 400:5 CTs on a 200 amp service then you will most likely lose some revenue. Demonstration to wire a Single Phase, FM 2S, 240V, 200A, 3 Wire, electric meter for a 120V, 2 Wire Service. The same applies to the form 16s. Form 1s. The most common is self-contained. Login. FORM 3S * Use the CT ratio in determining the meter multiplier. This service generally comes in two different voltage choices. My questions are: diagrams dated 05/19/2021 Note: This version supersedes previous versions of these guidelines . '#wB7`*> They differ a little in their specifications but products from any one of those companies should meet your needs. amzn_assoc_ad_mode = "auto";
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. Also further your career as a meter tech or lineman by learning more about how meters work. 3 Phase Meter Base Wiring Diagram - Wiring Diagram Schemas wiringschemas.blogspot.com. What is Electric Current and how it relates to Metering. The two meters, to the naked eye, look identical. Web below is the form 4s meter wiring diagram. 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. Close this window and log in. Follow the link to find out more about this theorem.