Introduction to Current Transformers Part 3: CTR

[@Generalpac]

🔥 Want to become a power systems expert? Our ALL IN ONE Bundle offers 11 courses for only $99.99! Don't miss out on this incredible opportunity to level up your knowledge. Enroll now! 🔗 bit.ly/ALL-IN-ONE-POWER-SYSTEM-BUNDLE

[@Generalpac]

Hey you guys, thanks for the feedback. For all our upcoming videos we won't add any music. Unfortunately, KZbin doesn't allow us to remove the music from previously uploaded videos. Thank you for your understanding. -GeneralPAC team

[@travisbuildsthis8673]

I have worked with CTs for a long time but I have never had any training this informative and this intuitive! Thank you for sharing this knowledge. Keep up the great work!

[@Generalpac]

Glad it was helpful! You can also check our Power Systems Engineering VLOG series in which our instructor Abdur Rehman talked about various power system topics along with detailed explanation. And you can have it with a 30-Days FREE trial: bit.ly/PSEVlog

[@Generalpac]

In Current Transformer course we will start from very basics: This course combines brief introduction to Current Transformer with its main characteristic and applications. You will emerge with the knowledge in principles, working, applications, sizing of CT that empowers you to have strong grip on the fundamentals of Current Transformer. This module consists of three parts, each building upon your knowledge based on previous ones. Get 𝟗𝟎% 𝐎𝐅𝐅 on 𝐂𝐮𝐫𝐫𝐞𝐧𝐭 𝐓𝐫𝐚𝐧𝐬𝐟𝐨𝐫𝐦𝐞𝐫 𝐅𝐮𝐧𝐝𝐚𝐦𝐞𝐧𝐭𝐚𝐥 𝐂𝐨𝐮𝐫𝐬𝐞: bit.ly/Current-Transformer-90OFF

[@Generalpac]

🎁 Enter the Thanksgiving Power System Pack Giveaway with your email! 🍀 One lucky winner will receive the Power System Fundamental Pack on November 23rd, and ALL participants get a FREE top-selling course. 📚 Sign in: bit.ly/thanksgiving-day-2023

[@Generalpac]

98% OFF | EARLYBIRDS DISCOUNT Sign up for our newly launched courses at 98% OFF. New video releases will be scheduled on a monthly basis. Grab this opportunity before it ends. bit.ly/earlybirds-discount

[@Generalpac]

YEAR-END SALE: Up to 95% OFF: bit.ly/power-systems-courses As 2023 comes to an end, it's time to take a breather and reflect on your journey this year. This isn't just about recognizing your wins and bumps in the road-it's also an opportunity to identify areas for growth, particularly in your learning goals. Lucky for you, our BIG END-OF-YEAR SALE is here to support you in achieving Your goals!

[@AKK105]

Can you recommend any good textbook for designing an electrical distribution system for a high rise commercial building?

[@Generalpac]

We would recommend the IEEE Gray book as a great place to start - www.protergia.com/descargas/IEEE%20Graybook.pdf Thanks, GeneralPAC by AllumiaX

[@ali64fahad]

Thanks for this series ct explication is perfect

[@SF-fb6lv]

It's kind of unfortunate that they refer to TURNS; based on what is shown at around 7:00, to me 'number of turns' should be thought of as number of 'passes' through the 'window', rather than 'loops' or 'turns' around the frame of the window. One 'turn' around the frame of the window is actually considered 'two turns' as shown at 7:56.

[@Generalpac]

Hello, Yes, you are right some how. But at different sites you will discover different answers of this question. Normally for current transformers, we considered the number of turns in a way it is explained in the video and for normal transformer we considered the number of turns in the way you have pointed out. Thank you, GeneralPAC by AllumiaX

[@jianhaowu7368]

hella perfect video

[@Generalpac]

Thanks. You might also be interested in our Power System Fundamental courses. Get started with FREE courses here: gpac.link/2GO6m4X.

[@NOOS1NOOS]

question: if you have a VT of 13800/120 and CT of 800/1 with connected load of no more than 400A. Lets say you decided to install a meter to read your total consumption. how would the meter read the consumption? would it read it as 400/800= 0.5A then 0.5*120*cos()= 60W? and is there any difference if I change my ct to 400/1 since i only have a connected load of no more than 400A, Am I still going to get the same reading as when using 800/1 ct?

[@manojkumarhk5696]

But doesn't this increase the voltage in the secondary circuit compared to primary circuit? In part 1 you told that the voltage is also decreased. My understanding is that, if number of turns is increased the voltage in the circuit will increase. (Mech engineer trying to understand some electrical topics, so please bear if it is a silly doubt)

[@pmlnworker392]

why the CT star connection should face the protected object? If we make the star point of ct on the othet side then would relay still be able to protect the asset ? What is the real purpose of ct star point ? please elaborate

[@SuMiTKuMaR4113]

best explanation i ever know.. thnks

[@arduinosynod1571]

Thank you. You must be a university proffesor. Greetings from Bosnia

[@yasserfarouk2848]

i have question if we have same source and same load but we have differnt trnasformer ratio like 400/1 and 400/5 so we have same secondry current

[@Generalpac]

+yasser farouk -- a 400/1 turns ratio is different than 400/5 turns ratio. It's important to know the difference. 400/1 = 400 secondary turns and 1 primary turns. 400/5 = 400 secondary turns and 5 primary turns which is the same thing as 80/1 If you have 600A primary current - a 400/1 turns ratio would yield 1.5A secondary current (600/(400/1)). If you have 600A primary current - 400/5 turns ratio would yield 7.5A secondary current (600/(400/5)) Does that make sense?

[@christianacena8530]

no, not the same lets assume 200 amps load for both ct's. in 400/1 ct the secondary current is 200/400= 0.5 sec amp. since turns ratio is 400. while in 400/5 ct secondary current is 200/80= 2.5 sec amp. since turns ratio is 80.

[@pmlnworker392]

Please also explain why we use these phase shifts in transformer like dyn11 etc ? what is basic purpose of doing that ? why we use wye and delta configuration of transformers ? what is advantage and disadvantage of both systems ? what is function of neutral in wye transformer and how it works ? why we take care it is grounded or not ? please explain completely thank you

[@Generalpac]

+rana zohaib, that is loaded question and the answers will come easy if you put time and efforts to understand this subject. There are a lot of benefits for using a delta wye transformer. We can completely isolate ground protective relaying with delta connection. We can suppress harmonics with delta connection. We have good stability of voltage with grounded wye connection. We also assume that our system is a "grounded" system if we ground the neutral. So lots of benefits with both the delta connection and the wye grounded connection. There are many ways that we can make a delta connection and many different ways we can make a wye connection. The Dyn11 simply describes (through phase relationship) one way that we can make/connect a delta wye transformer.

[@Generalpac]

+rana zohaib, that is loaded question and the answers will come easy if you put time and efforts to understand this subject. There are a lot of benefits for using a delta wye transformer. We can completely isolate ground protective relaying with delta connection. We can suppress harmonics with delta connection. We have good stability of voltage with grounded wye connection. We also assume that our system is a "grounded" system if we ground the neutral. So lots of benefits with both the delta connection and the wye grounded connection. There are many ways that we can make a delta connection and many different ways we can make a wye connection. The Dyn11 simply describes (through phase relationship) one way that we can make/connect a delta wye transformer.

[@YASHWANTH25691]

In the window type current transformer, how does the primary conductor passing through, make it 'one turn'. It doesnt make any turns right!

[@Generalpac]

Hi Yashwanth, In literal terms, the conductor passing through the window type CT does not have any 'turns'. However, the term 'turns' is extensively used in electrical engineering literature to refer to the number of times the current has to travel through a similarly shaped part of the circuit. See the image in the link below which shows a solenoid, where there are 6 'turns' --or say 'identical portions' of the circuit, so in a circuit where there are no turns, there will only be one 'identical portion' for the current to pass through. circuitdigest.com/sites/default/files/field/image/What-is-Solenoid.png The term 'turns' has been adopted for use in a number of equations, one of the most famous being the transformation ratio of a transformer. To maintain consistency with the existing literature, a single straight conductor is called as having 'one turn'.

[@it2basrah]

thank you very much.

[@deepkhanderia5270]

I have a question dude ! Why Is is opposite to Vs ?

[@sasikala2611]

Good

[@Generalpac]

Hey Sasi, You might also be interested in our "Power Systems Engineering Vlog" series. Signup now and get 75% OFF: bit.ly/33dB0MM . This is a limited-time offer. We hope you benefit and enjoy it. :)

[@ช่างโอ๋โมดิฟาย-ฮ5ย]

Sorry sir.I am a new student.I have a question? ct is ratio =200:1. So I want to know the number of secondaryturn and number primary turn? Please. Thank you.

[@milesrowe2263]

I think that the primary turns would be 200 and sec is 1

[@bravindsouza3375]

Sir by increasing number of turns in secondary, we are increasing voltage in secondary So how measuring instrument will be subjected to high voltage ?

[@juanandresvarelafadul8669]

I have the same question here

[@travisbuildsthis8673]

Keep in mind, the main goal is lower current. A CT is a modified step up transformer but it is in series with the circuit that it’s reading. It has a very low impedance and therefore hardly a voltage drop.

[@christianacena8530]

the diagram showed was not for ct rather its for pt since there was a potential difference between the source.

[@Generalpac]

+christiandale acena what would a correct CT diagram look like?

[@emerssky]

What App/Software is this sir? thank you!

[@eepower]

well explained

[@13AIY]

Nice!! Jonah Hill explaining CTR

[@DKSingh-wy3xu]

can u provide ct error lecture

[@Generalpac]

+deepak singh will do :)