Current Transformers (CT)

Рет қаралды 478,103

Күн бұрын

Current transformers are used extensively in metering and circuit protection. Eaton's Power Systems Experience Center is the ideal place to learn how to properly apply CTs considering accuracy, types, safety, temporary and permanent applications.

Пікірлер: 123

@jmsule9367 2 жыл бұрын

Just about a quarter of an hour, yet one gets real value comparable to a 24hrs lecture. Thank you

@Z901Z 2 жыл бұрын

Your definition of a CT alone at the beginning is worthy of millions! No one has been able to explain to me what a CT is properly until now...

@sajalj 4 жыл бұрын

This is one of the best video posted on this channel. Very well explained.

@kurmisty 12 күн бұрын

Thank you, very informative for a newbie to the world of electricity. Presentation was very good - to the point and easy to follow.

@michealeniguse4862 2 жыл бұрын

This is the best and detail presentation! Please keep up on uploading more videos. Thank you!

@TradingEquipmentSolution 2 жыл бұрын

This is one of the most videos that was shared a good information about CTs, Thanks so much.

@closetcleaner 4 жыл бұрын

It was about time someone posted a good video on CTs. Thank you.

@westongenesis7007 2 жыл бұрын

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@conradomar3455 2 жыл бұрын

@Weston Genesis instablaster :)

@westongenesis7007 2 жыл бұрын

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@westongenesis7007 2 жыл бұрын

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@conradomar3455 2 жыл бұрын

@Weston Genesis No problem :)

@kankoeadamahhemazroyao.9485 3 жыл бұрын

Indeed simple explanation of current transformer Great video. Thanks

@chudoe3459 3 жыл бұрын

Great video. I appreciate the thoroughness.

@AsanMasraf Жыл бұрын

This is how presentation and explanation should be, many thanks.

@abdeldjalilselama2490 2 жыл бұрын

The Best Video Explaining a CT on youtube to this date

@SuperIndianmuslim786 2 жыл бұрын

Great low cost technique for measuring low frequency, high current but for higher frequencies and lower current measurements Hall effect sensors are used but those are pretty much expensive.

@danmac6552 3 жыл бұрын

Loved the acting! What a great video packed with useful information. It would be nice to have more information on the test procedure that produces the excitation curves.

@Ravi_Raj_Gupta 2 жыл бұрын

Check out videos on MVCT/ MRCT (used for testing CT).

@Attractiveteamwork Жыл бұрын

🙏

@azeemahammed8646 3 жыл бұрын

thanks a lot,this is the video that i was looking for

@Vigneshvicky-sn1qy 3 жыл бұрын

Amazing explain. Thank you sir

@Croatien007 2 жыл бұрын

Great video, wish I could find a video about CVTs that is good like yours

@SB-dc9qb 2 жыл бұрын

This is great knowledge. Thank you.

@josediaz2643 3 жыл бұрын

Excellent video!!!!! Great Work!!!!!

@EngineeringApi 4 жыл бұрын

Great Video and nice explanation

@ALBRON-23 Ай бұрын

The very best explanation ever. Thank you.

@brianthecryinlion Жыл бұрын

This was a great video. Thanks!

@NachshoN55555 2 жыл бұрын

Very informative. Thank you.

@ian6083 2 жыл бұрын

Thank you for the lesson!

@pradeepkumar5205 Жыл бұрын

Very good information. Can you explain, how to choose the resistance value that can be connected across the CT output?

@sirousmohseni4 3 жыл бұрын

Excellent video. Thanks

@barzantawfeeq4124 2 жыл бұрын

thnx a lot for your clear explaination👍👍👍👍👍👍👍👍👍

@pujagautam6853 4 жыл бұрын

Realy interesting 👌

@Kheljagat536 3 жыл бұрын

Great explanation

@mallikarjunaraosutraye1076 4 жыл бұрын

Sir here 1000/5 A, output is 5A is independent on the burden Impedance.?

@ilawagbonaustin2013 6 ай бұрын

simple and understandable presentation

@lalmohanjena4524 2 жыл бұрын

Nice demonstration.

@franciscoorlandomacuacua1864 4 жыл бұрын

very interesting learning.

@paulinusike954 2 жыл бұрын

Good lecture thank you very much. please can anyone help me on how to connect a motor protection relay with an external CT. I have an adjustable motor protection relay with internal CT the range is from 10 - 999A, the space for primary main conductor cannot contain my cable size based on the motor capacity, so i want to make use of external CT to achieve same result.

@rich5034 Жыл бұрын

Makes me want to apply at Eaton!

@maqsoodahmed8043 2 жыл бұрын

Very nice way to explain

@r_mclovin 5 күн бұрын

This is AWESOME!

@malaygopani1894 3 жыл бұрын

Great video

@bobcocampo 2 жыл бұрын

Do you have any guide for paralleling of Current transformers?

@boguslawasihorova 3 жыл бұрын

Can somebody explain. How is possible 0 vector summary in CT between N neutral and L phase.

@oscarmwandu8802 Жыл бұрын

Thank you for the information

@runbou3485 2 жыл бұрын

thanks ticher 👏អគុណ

@noelfaithfulkari2857 10 ай бұрын

Amazing knowledge. Please 🙏 could you do video for VT and differential relay for transformer.

@loginavoidence12 Жыл бұрын

6:18 never leave CT unshorted or unburdened when energized. i had a trouble call from an engineer who burned down a brand new 5k volt breaker because he energized it with the CTs open. what happens is they run away. all the terminal blocks, which are rated to take 30a continuously, all burned into a single smelly glob of plastic

@runbou3019 3 жыл бұрын

Thanksអគុណបង👍👏

@ronaldosilva330 2 ай бұрын

Congratulations 👏!

@jeffb.6470 2 жыл бұрын

Great presentation! Anyone know the software used to show the vector and sinwave illustration at 10m46s?

@dhruvpatel6735 Жыл бұрын

MATLAB or EXCEL VBA.

@iraqresitance9663 3 жыл бұрын

Hello from iraq well done

@rumeshrenuka2513 3 жыл бұрын

Brilliant explanation about CT

@arunprasaath8290 3 жыл бұрын

nice and useful video

@gauthamkrishnan3487 4 жыл бұрын

excellent.

@shubhammunde2331 2 жыл бұрын

Can i use 6 CT a one meter for different one more cable?

@kythuatientranthanhtien8135 2 жыл бұрын

Help me. What mean rated current 10/min. 0,08A? Thanks

@fa6151 2 жыл бұрын

Thank you so much 👌

@biaelectric9066 Жыл бұрын

The diagram shows DC current. How is the load being measured on an AC system? I.e. why does the CT direction matter?

@initiallearnwithme 2 ай бұрын

great topic

@Artistic_S0ul_ 2 жыл бұрын

I have a question. Please could you tell me what would happen if the primary flow current is 300A permanently and the CT protection ratio is only 200/5 A 10 VA? Is there a possibility of damage to the CT?

@kalininyuri 2 жыл бұрын

It will burn

@DizzyD4212 11 ай бұрын

Depends on the thermal rating factor (TRF) of the CT, and the input ratings of the protection/measuring device. If the TRF=2.0 (very common), the CT will be fine, but will output a continuous 7.5 amps on the secondary. If the protection device can handle that 7.5 amps indefinitely, all will be good. This is routinely done in metering applications in substations.

@rosarioparlatore7020 3 жыл бұрын

Hi, i would like to understand better the concept opening circuit can be dangerus. The voltage step up to 1000Volts. So better to keep always the circuit close or shunt in place

@robertb2444 2 жыл бұрын

On the 600 volt rated cts the open circuit voltage will only rise a few hundred volts and not thousands., but the higher voltage rated ones will.

@MasonAmadeus 3 жыл бұрын

Great, well presented video. Thank you! Although I won't lie, the acting at the very beginning isn't going to win any BAFTAs, haha.

@meptvshow6699 Жыл бұрын

thanks for share

@akhil__dev 2 жыл бұрын

Great video. But the background music sounds like it's a survival video or an explanation of a space mission.

@shubhammunde2331 2 жыл бұрын

How to connect CT meter with 3 different cables...

@chungdutshering2611 3 жыл бұрын

Can you make about potential transformer

@StephenAkins 2 жыл бұрын

Am I correct in assuming CTs can only work with AC?

@johnkobak1363 10 ай бұрын

Absolutely

@johnjacobjinglehimerschmid3555 11 ай бұрын

So how would you choose a CT for residential power monitering? Say a 20a line and I'd like to reliably know if there is 0.5a to 16a being used? Is there an equation that helps to select appropriate CT?

@mikeiver 10 ай бұрын

They are all over ebay for cheap. They need a burden resistor to convert the current to voltage.

@dhananjay4525 2 жыл бұрын

You da best

@jameszhao6628 3 жыл бұрын

What do the letters 1H,2H mean at both side of CT?

@sang3Eta Жыл бұрын

He explains this at 10:00 what are the odds I was reading your comment just as I reached this part of the video LOL.

@user-dr2pg8fk2i 2 жыл бұрын

Where is the flash protection?

@dowbatw 6 ай бұрын

I think 2:11-2:20 may be wrong? When primary winding has 200 turns and secondary winding has 1 turn, 1000 amps on primary side would produce 1000×200 = 200000 amps on secondary side.

@sohailjanjua123 2 жыл бұрын

Hi, I like your video. Thanks

@jahidmrida64 10 ай бұрын

Thank You

@albertmatin6683 8 ай бұрын

bonjour, pourquoi mes ton le S2 a la terre sur un transformateur de courant en basse tension

@surendrakverma555 4 жыл бұрын

Very Good 👍👍👍

@TimmyBoja Жыл бұрын

1:42 - why are you showing current direction on an AC system? 😮

@farukahmed7263 2 жыл бұрын

Nice

@robertb2444 3 жыл бұрын

Opening ct circuit on 600 volt rated or less is not as dangerous as the higher voltage rated. The older metering handbook stated this. But once an opinion becomes excepted as fact, reality is lost! We have be changing 3s meters for years without a bypass or shunt. Which opens the current circuit!

@soundslight7754 Жыл бұрын

CT is a sensor, it's true that it works on electromagnetism principles and to pick up current passing without interrupting it, it has to rely on induction, so it works like a transformer, but it remains a sensor. CT stands for current transducer (= sensor). If we call this device a transformer, then perhaps we can call all radio devices including all mobile phones transformers because they all work on electromagnetism and induction principles, no?

@loftycloud5404 11 ай бұрын

Everyone I know, including myself, and every book and manual I read called it a current transformer. And VT or PT as voltage or potential transformers and both are grouped under instrumental transformers as opposed from a power transformer like a distribution transformer. I get that instrumental transformers are essentially sensors, but everybody and everything calls them transformers because they are in essence that, and are tested and treated as such. Ex: Radio device don't spit out high voltages when back feed, and in fact can't really be backfeed effectively at all, they don't have voltage or turn ratios, are not tied to specific electric grids, no magnetic saturations points, no primary-to-secondary insulations values, etc etc. As far as I found, they are originally called transformers from the beginning.

@TimmyBoja Жыл бұрын

3:57 - agh!!!! What are those arrows support to represent?! (Hint: it definitely isn’t current!)

@johnjacobjinglehimerschmid3555 11 ай бұрын

I suppose that would be the direction of the current carrying HOLES as the electrons would be going the other direction NO?

@TimmyBoja 11 ай бұрын

@@johnjacobjinglehimerschmid3555 no. DC current has direction but alternating current doesn't - it alternates. The whole point of RMS is to remove the sign (direction)

@crimznn17 3 жыл бұрын

Cold sequence next

@seablue1085 3 жыл бұрын

azaming! thanks

@electromagneticworld Жыл бұрын

👍🏻👍🏻

@anmolmaharana5770 3 жыл бұрын

From 1:48 to 2:00 how did you make the animation

@alexnoggle1874 Ай бұрын

INFORMATION OVERLOAD AHHHHHHHHH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! (thank you)

@anmolmaharana5770 3 жыл бұрын

How you are making this animated video

@lambadapuneethraj3846 3 жыл бұрын

Why is CT not accurate for low currents?

@jyotielectrical7393 3 жыл бұрын

If u measure low current using low ratio ct like 5/5, 10/5 kzfaq.info/get/bejne/btd7aKmrlrGUin0.html

@robertb2444 3 жыл бұрын

Some of the new cts have higher accuracy at measuring the lower currents in circuits. We use high accuracy, extended range cts on new installations.

@robertb2444 2 жыл бұрын

The magnetic field in the primary will be to low if the primary current is low. The magnetic field must be strong enough to excite the secondary. You can loop the primary back through the ct to increase secondary. If primary only has 1/4 amp, looping through ct 4 times will produce 1 amp on primary, increasing the secondary current, but the ratio will be ÷ by 4.

@idaras2012 3 жыл бұрын

These really addresses my problems on CTs but I'll like to have some personal discussions with you , please can you inbox to have your email ?

@kaysonneilly2364 3 жыл бұрын

I'm calculating the number of secondary turns on a transformer where the ratio is 8:3 with a voltage of 440V and 750 turns on the primary winding and a 40 ohms resistor on the secondary winding so my brain is dead

@510purple Жыл бұрын

buy a megger ttr. this will give you a better idea of turns ratio. for example if the transformers primary is 12470v and the secondary is 480/277Y. divide 12470 by 277. this will give you the exact turns ratio results.