0 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. What is Electric Current and how it relates to Metering. FLEXIBLE PLATFORM Technical information. If you go the other way and install 400:5 CTs on a 200 amp service then you will most likely lose some revenue. Click here for a form 2s meter wiring diagram. Here I will try to demystify the CT PT confusion. Demonstration to wire a Single Phase, FM 2S, 240V, 200A, 3 Wire, electric meter for a 120V, 2 Wire Service. 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. waross (Electrical) 8 Jan 19 00:17. 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. Itron/Schlumberger Technical Info. This makes no sense to me. Join your peers on the Internet's largest technical engineering professional community.It's easy to join and it's free. 65 0 obj <> endobj If there are any other questions that you may have please let me know. Click Here to join Eng-Tips and talk with other members! If a service has both CTs and PTs then the two values are multiplied together to give the billing multiplier. Wiring Diagrams - Bay City Metering NYC www.baycitymetering.com for any new IT-rated installation and make all secondary wiring connections to the meter. amzn_assoc_region = "US";
What is the difference between voltage and current? I currently have PQ meter installed in my generator switchgear compartment with PT (due to 13.2kv) and CTs. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. Wiring Diagrams - Bay City Metering NYC. -------------------- What is the Multiplier ? One is to program it into the meter and another is to put the multiplier into their billing system. Form 3s meters are typically used for single phase two wire services where the service is so large that it requires CTs. Web, single phase meter wiring . 6- Terminal. Meters are rated 240 or 480 volt respectively. 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.) 0000004125 00000 n Here is a wiring diagram for the form 4s meter. Web form 3s meter wiring diagram enginepartdavid.z21.web.core.windows.net. 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. Meter rated 120, 240 or 480 volt. The reason is that CTs are most accurate at their nameplate values.
As an option, the meter is available with interchangeable personality modules, including demand, time-of-use (TOU) and load pro le. %PDF-1.5 % They are also called VTs or voltage transformers. Yes the CT ratio is considered. 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. 3^,cVf 1.iOk. Already a member? Please let us know here why this post is inappropriate. Web here is a wiring diagram for the form 9s meter. You do not want to overdrive the meter by placing more than 20 amps in the meter base because you sized the CTs incorrectly. amzn_assoc_ad_mode = "auto";
Wiring Diagrams - Bay City Metering NYC www.baycitymetering.com. 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? Form 9 (3-element) Set the meter's Volts Mode to 9S - 4 Wire Wye/Delta. This meter is most commonly used in a 240v, single phase three wire service. The form 2s is by far the most common meter form out there. Form 12s. Let I have a energy meter and I dont have information regarding its C.T ratio configuration, then what should I do? 0000000696 00000 n Halving the multiplier provides the average of the two leg currents. Required fields are marked *. Web the current wire connects to x1 on the ct. amzn_assoc_default_category = "Tools";
Our monthly bills are the same as they have always been! I have sent you an email with the details. _g7bDwCh o7d=HhF8Y}K]se~^Cj=vxd The Form 16s meter is typically used to meter the 4 wire wye service. Click Here! This is a transformer-rated meter that would be used when the service is too large to put in a form 2s meter. Form 3S Meter - 3 Wire. Thanks, I hope I have helped. Some CTs have a rating factor of 4, 3, 2, or 1.5. This really is an incredibly well written article. Web the form 16s meter is typically used to meter the 4 wire wye service. Any way keep up wrinting. I have sent you an email. I stumbled upon your blog the usage of msn. Another thing that many people want to know is what is the current transformer sizing calculation. You may also go to http://www.learnmetering.com/meter-forms to learn more as well. what is the effect of using a ct with ct ratio lower than that of the load to be metered? You will want to verify that the multiplier is correct on your billing system and that the bill is being calculated correctly. Is C.T ratio is considered while installing a energy meter? It tells you what the multiplier will be in the circuit. Form 6S, 8S, 9S,. 118 0 obj <>stream (adsbygoogle = window.adsbygoogle || []).push({});
. *Eng-Tips's functionality depends on members receiving e-mail. hb```"i8SAd`e`s. Some people refer to the meters that use a CT PT combination or just CTs as a current transformer meter. My advise would be to contact your utilities commission. 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. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Learn how your meter works and save on your power bill. The difference between the two is that that the transformer-rated service uses CTs whereas the self-contained service does not. They are both typically used on a 4 wire delta service type. Cut myself shaving down there won't stop bleeding. Revenue grade CTs are engineered to produce 5 amps when the amps on the service are at the rated value. This meter form violated Blondel, but provides good accuracy when the two leg to neutral voltages are balanced. Here I will try to demystify the CT PT confusion. They are used to step down the voltage to a safe level so that it can be metered. The form 2s is by far the most common meter form out there. Halving the multiplier provides the average of the two leg currents. I hope you got what you were looking for! It all depends on the service. Or alternative? Networking refers to using 2 phases and a neutral from a 4-wire wye three-phase bank to provide 3 wires similar to a single-phase service. Here is the wiring diagram for the form 16s meter. While other utilities do not. Am I able to power up two tenancies off one CT?
This meter is most commonly used in a 240v, single phase three wire service. Why Choose Primary Metering Over Secondary Metering? This diagram shows how to wire it for V. Click here to view and print the full size diagram. amzn_assoc_enable_interest_ads = "true";
0000003753 00000 n Form 4S Meter. By joining you are opting in to receive e-mail. Transformer size is 150 KVA/415V. Here is the wiring diagram for the form 16s meter. '#wB7`*> The CT is connected so that it will add the negative of one leg to the positive of the other. <]/Prev 451627>> 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. This meter is also used in a 4 wire delta service, also known as a high-leg service. I sent you an email. There are a few scenarios I can think of for this one. Copyright 1998-2023 engineering.com, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission. Typical ratios are 200:5, 400:5, 600:5, 800:5 and so on. amzn_assoc_emphasize_categories = "13900871,172282,16310091,228013";
. If you are asking if you can install 200:5 CTs with a 400 amp meter then no. hmS6?A^M$+3sL$0$R^8H|ulc@l\a:Ykv;3C&}IL{PbO-f So, check the rating factor of the CT and the current rating of the meter. Form 2s. I know of a utility that had a billing system that would only accept multipliers as a 1, 10, 100, etc. amzn_assoc_linkid = "799dc539c74e6eece1e3a0a794897920";
0000065589 00000 n 136 0 obj <> endobj The form 2s is by far the most common meter form out there. If they found that the multiplier was incorrect and have now corrected it then yes your bill could double in this case. Form 5S Meter - Delta No VT. Form 5S Meter - Network. Web external meter wiring should be consistent with the meter class rating. amzn_assoc_ad_type = "smart";
0000040663 00000 n odd one.. We are replacing an old analog 5s meter with a new AMI meter. You should be able to see their tariff (rules and regulations governing that particular utility) are online. Power companies have a couple of different ways of putting the muliplier into their billing systems. 3 Phase Meter Base Wiring Diagram - Wiring Diagram Schemas wiringschemas.blogspot.com. 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. what happens if CTs of 200 ams installed to a 400amp meter and vice versa. Wiring meter diagram form 9s diagrams delta metering 3p circuit bay 4w. When 200 amps are flowing through the primary side of the CT, 5 amps are coming out of the secondary terminals. 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. Great information, thank you. They should be the same. Form 4s 3 wire using ct's 2 or 3 element meter wiring diagrams. Web form 9s meter wiring diagram diagramweb.net. The wiring diagrams within this document represent standard conceptual designs for commonly used service it rated. 0000001585 00000 n The wire running backwards cancels itself out so as not to add to the amount of current registered from the spades. This is because 40 x 2.4 = 96. 1 3. Web Form 3S * Use The Ct Ratio In Determining The Meter Multiplier. Also, some utilities do not use PTs in 480v services at all. Ive been reading your weblog for some time now and finally got the courage to go ahead and give you a shout out from Dallas Texas! 0000001620 00000 n Click Here! 3 ct coil and amp testing meters are shown. 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. Meter Connection Diagrams. 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. Now, to find the correct current transformer size for a three phase service we use this current transformer sizing calculation. 0000009835 00000 n You have touched some fastidious things here. Click here to view and print the full size diagram. amzn_assoc_tracking_id = "cts_pts-20";
There are three (3) PTs (wye-connected primary). Below is the form 4s meter wiring diagram. 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. 0000004392 00000 n Have the been tested and shown that they are no longer accurate? Most transformer-rated meters today are class 20 meters. For example, a typical installation in a 120/208 service 400 amp service contains 200:5 CTs. If the CT ratio is 200:5, then the meter multiplier is 40, which is simply 200/5. 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. Remember that standard CTs are most accurate at their nameplate rating up to their rating factor. Web 12s phase form meter diagram wiring 120 single fm 480v socket ge 200 amp 208v 120v 200a 3ph terminal ct. Meter form to be used (i.e. trailer What would be the best way to meter this using CTs? A wiring diagram is a simple visual representation of the physical connections and . Watthour meter information. amzn_assoc_ad_type = "smart";
Also, many utilities decided to convert many of the 120v services to 240v just so they could install a 2s meter. There are also basically two types of services that metering installation will have. If the bill was 10-15% high, i can understand but its coming more then double compared to others. To ensure proper . Use the CT ratio times the PT ratio and you have your multiplier. They had to specifically order their meters with the correct register ratio so there was some math involved. xref Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Form 12s meters are self-contained meters that can be used on a few different services. They can also be used for three wire single phase services as well as single phase primary metering. Registration on or use of this site constitutes acceptance of our Privacy Policy. The short answer is yes but I have sent you an email. This is all done by a human and sometimes we get things wrong. I am always here to help. Thanks a lot!. 0000003497 00000 n This form is also used for many small businesses as well. :_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 Form 3s. We have received your request and will respond promptly. No problem Rich. This field is for validation purposes and should be left unchanged. 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. I couldnt resist commenting. Any advice? how can we know the standard CT to be install. 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. The meter multipliers are calculated the same way. 6. Wiring Diagrams - Bay City Metering NYC www.baycitymetering.com. When CTs and PTs are used in a metering installation, the installation is known as being transformer-rated. 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. My running load is around 110 HP and my bill comes very high compared to other plants who have the similar machines. Web form 3s meter wiring diagram wiringdiagram.z21.web.core.windows.net. hb`````b`c`p2cb@ !fvUd) \bl p) ) H;3X~ykD'l>(4%BM&2cRtIg46kL I read your email also, very informative with fitting example. 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? So, when the meter is pulled out of the meter socket the power to the service will go off. First, and I would say most common, is that the multiplier was just wrong because of human error. technology and affordability. 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. Form 12s meter wiring diagram. 277/480V Three Phase 4-wire Over 60KW Form 16S Interval. Here is the wiring diagram for the form 16s meter. Wiring diagrams circuit meter form metering types 3w 3p bay services. Would it be 2 CTs and 3 voltage connections or 3CTs? Meters are rated 240 or 480 volt respectively. To properly size CTs it is important to know what the actual connected load will be. Form 16s. (adsbygoogle = window.adsbygoogle || []).push({});

Could you provide me with more information? 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. (adsbygoogle = window.adsbygoogle || []).push({});

Form 9s. You will need to make sure that you are reading the meter on the same days that the company is reading the meter. Unfortunately this could absolutely be correct. CT rated meters are also typically demand meters as well. Your site has good common sense information, without going off the rail. The same applies to the form 16s. I sent you an email. - Wire directly from last IT to meter socket, or provide junction box on PMS - Insulate and protect from wildlife all HV connections and pigtails - Install and connect one set of surge arresters on HV connections . This allows you to bolt wires to them. As a tech and EE student, thank you. PTs are potential transformers. Some typical PTs are 2.4:1 and 4:1. (120/208V or 277/480V) Meter rated 120 or 277 volt using line-to-ground voltage. Metergod Monday - Form 6S or 36S installed on a Form . So, what do CTs do? Eckhard Bick - PDF Free . 0000012484 00000 n amzn_assoc_ad_mode = "auto";
The most common is self-contained. 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. Form 9s. This meter is most commonly used in a 240v, single phase three wire service. Site Map. I want to duplicate the pq meter with a ISO compatible meter due to requirements of the utility for generator metering. Meter Form Drawings, provided by Durham Company. A form 16s meter is a self-contained meter and a form 9s meter is a transformer-rated meter. (adsbygoogle = window.adsbygoogle || []).push({});
Form 4s. FORM 3S * Use the CT ratio in determining the meter multiplier. H1 X1 . The ratio will be printed in large letters on the side of the CT. diagrams dated 05/19/2021 Note: This version supersedes previous versions of these guidelines . The smaller black line connects to the voltage terminal in the form 9s meter socket and the. 0 With and without ct's and pt's, for wye, delta, and network. Regards.. No problem. Read why you should be using PTs here. Web msd wiring diagram step 7al three module selector instructions basic figure. Meter Form Drawings, provided by Durham Company. (120/208V or 277/480V) or meter rated 120 or 240V using line-to-ground voltage. 277 volt meters have 277V nameplates and are calibrated at 277V. If 240/416 service (uncommon), meter rated 240 volt, 240 and 277 volt wye meters are applicable to either 240/416 or 277/480 volt wye service, 240 volt meters have 240V nameplates and are calibrated at 240V. 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. 120/240V Single Phase 3-wire Under 60KW Form 2S Scalar . What is Electric Current and how it relates to Metering. 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:
Rating of CTs is 600/5 and we are using multiplier of 120. Why Does it Seem Like my Power Bill Keeps Going Up? hi, We have a 3 phase machine with 100KW load capacity installed what CT ratio energy meter will best suit the requirement . Also further your career as a meter tech or lineman by learning more about how meters work. Your email address will not be published. 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. We also know much about CTs and meters because of Blondels Theorem. Good day! 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. This would place 25 amps in the meter base going over the meters rated capacity. Many people want to know what is a current transformer and potential transformer. I love the information on your website. This means that unlike self-contained services the customers power is not interrupted when the meter is removed. 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. endstream endobj 96 0 obj <>stream This leads to lost revenue. meter phase wiring diagram socket jaw wire electric base amp 200 service electrical waterheatertimer delta pole neutral mobile needs box. Or, alternatively, you could look on your bill and look at their readings and use those for your calculations. Meter multipliers are used when meters are installed in transformer-rated installations. 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 They differ a little in their specifications but products from any one of those companies should meet your needs. Thanks. Is there a particular reason they want to replace the CTs? When the core of the CT is fully saturated it is the most accurate. d(0}Gf82hG..>[i"s7#mnp clh(u9VBg}idQRj4Q~10^z]3d7Jmd c$B/7 It is available as an energy meter with an LCD register. Just wanted to tell you keep up the fantastic work! Web below is the form 4s meter wiring diagram. startxref They are both used on the same service type. How would we calculate the voltage induced into the secondary circuit? Already a Member? endstream endobj startxref 0000001174 00000 n hbbd``b`$N H@#@e . H[2012H@ (adsbygoogle = window.adsbygoogle || []).push({});
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Form 3S Meter - 2 Wire. 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. Web form 3s meter wiring diagram wiringdiagram.z21.web.core.windows.net. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action. For 100 amp meters, use #2 wiring (or in accordance with standard utility operating practices) That is because a 400 amp meter is a self-contained meter and does not use CTs. If so, you can correct it. My questions are: 0000068655 00000 n
The meter has two (2) dedicated CTs. There is not too much detail to go into. 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. Follow the link to find out more about this theorem. endstream endobj 93 0 obj <> endobj 94 0 obj <> endobj 95 0 obj <>stream The reason that they are needed is that either the current and/or voltage of the service to be metered is too high. Also further your career as a meter tech or lineman by learning more about how meters work. I will make certain to bookmark it and keep coming back to read more of your own useful info. Assuming we have a 120/208 supply, and a 200:5 CT. Would it remain the same @ 120v/line? ,@ Sa34f0i\FP The most important things to note on the nameplate are the ratio and the rating factor. You no longer have to carry an 8s meter and a 9s meter or a 15s meter and a 16s meter. 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. What is the difference between voltage and current? (adsbygoogle = window.adsbygoogle || []).push({});

This meter can also be used for 3-wire network system. Thanks for response, and confirms my thoughts. Terminal. 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. Author: Deborah Zillich Created Date: The relays have their own dedicated sets of three (3) CTs. amzn_assoc_fallback_mode = {"type":"search","value":"current transformer"};
Enough about CTs, lets talk about PTs. Now i want to know what rating of current transformer and potential transfomer i should install. (adsbygoogle = window.adsbygoogle || []).push({});
. These are the most common meter forms that are used. Could this be correct? Wiring Diagrams - Bay City Metering NYC. All neutrals must return to a common, single source form 3s meter 3 wire. 2800 Duncan RoadLafayette, IN 47904 U.S.APhone: 765.742.1001 Tech Support: 800.777.2774FAX: 765.429.0936 Like us on Facebook and get all the updates. MAERICH www.maerich.com. If ct ratio is 600/5 and meter ratio is /5. 11.0 4-Wire Circuits Metered with 2-Element Meters 11.1 Delta Connection at Test-block/switch. I am assuming that you 120:1 PTS. The most common use for the 1s meter now is for sign services which only require 120v. So I know that the CT ratio is 500:5 and its a 3 phase 4 wire supply 3 x 230/400V. ROUGHRIDER ELECTRIC COOPERATIVE . Eversource Metering Wiring Diagrams MA SMART Program Specific November 2018. . Form 1s. Wiring diagrams. 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. Look for estimated or levelized billing, it might be under low-income customer billing options. 0000001733 00000 n 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. Login. 12470 3 phase 4 wire high side diagram wiringmanualpdf.blogspot.com. The best way to do this is to consult with the engineer. Exceptionally well written! I hope that I am understanding your question correctly.
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