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Electrical Engineering Academy
Germany
เข้าร่วมเมื่อ 11 ก.ค. 2018
Decoupling Protection Test with ARTES from KoCoS
Welcome, dear friends of protection, control and electrical engineering. Today, Bryan Fleuth shows us how an decoupling protection test can be carried out using the ARTES test system from KoCoS Messtechnik AG.
Have fun watching,
Your EEA-TEAM
PS: further information can be found at www.electrical-engineering.academy
Have fun watching,
Your EEA-TEAM
PS: further information can be found at www.electrical-engineering.academy
มุมมอง: 79
วีดีโอ
Digital Twin meets Digital Twin 🤝
มุมมอง 6082 หลายเดือนก่อน
A warm welcome, dear friends of protection, control and electrical engineering. In our new video, Andrea Bonetti from MEGGER shows us how a fully digital protection test, with a digital test set twin from MEGGER and a digital distance protection relay twin from Siemens SIPROTEC, can be used to prepare a real protection test on site. Have fun watching, Warm wishes, your EEA-Team
Digital Secondary Substation with Earth Fault & Short Circuit indicators
มุมมอง 3412 หลายเดือนก่อน
Welcome, dear friends of protection, control and electrical engineering. How can modern secondary substations be digitally integrated? In our new video, Gerald Jacob (A. Eberle GmbH & Co. KG) shows us some practical solutions using the example of Netze BW GmbH. Have fun watching, your EEA-TEAM
Power Quality with Smartphone?
มุมมอง 605 หลายเดือนก่อน
Welcome, dear friends of protection, control and electrical engineering. Today, Thomas Schwarz (A. Eberle GmbH & Co. KG) shows us how to get a grip on power quality measurements with an app on a tablet or smartphone. Best regards, your EEA-TEAM PS. Further information can be found at www.electrical-engineering.academy
Distance Protection Test with DigitalTwin 🤩
มุมมอง 3275 หลายเดือนก่อน
Welcome, dear friends of protection, control and electrical engineering. Is it now possible to carry out a secondary protection test with a Siprotec DigitalTwin? YES! With the ARTES test system from KoCoS Messtechnik AG, this is now possible. In a short and snappy video, Bryan Fleuth shows us how it works. Have fun watching, Your SCHUTZTECHNIK-TEAM Please finde further informations at www.elect...
DC Currents english
มุมมอง 154ปีที่แล้ว
Welcome dear friends of protection, control and electrical engineering. In today's article Alexander Lübke from Hubert Göbel GmbH and Roland Bürger from the company SENSELEQ present us the laboratory results of an investigation on the detection of small DC currents at large 50 Hz amplitudes. A noteworthy measurement. Have fun watching and warm wishes! Your EEA-Team
Voltage and current sensors?
มุมมอง 271ปีที่แล้ว
Welcome dear friends of protection, control and electrical engineering. Today, Josef Schmidbauer (OMICRON) will show us how easy it is to test current and voltage transformer sensors. Have fun watching and warm wishes, Your EEA-TEAM Further Informations on: www.electrical-engineering.academy
Kill Remanence with a hammer ?
มุมมอง 429ปีที่แล้ว
Welcome dear friends of protection, control and electrical engineering. Is the legend true that you can eliminate the remanence of a current transformer with a hammer? We're taking the test today. Enjoy watching!
Quick Protection Test
มุมมอง 3922 ปีที่แล้ว
Welcome dear friends of protection, control and electrical engineering. In our current video, Florian Fink shows us how protection tests can be carried out in a nutshell. Have fun watching and warm wishes! Your EEA-TEAM Further Informations: www.electrical-engineering.academy
Quick Check of Distribution Substations with Ring-Main-Units
มุมมอง 6452 ปีที่แล้ว
Welcome, Dear friends of protection, control and electrical engineering. How do we carry out economic tests on modern and intelligent distribution substations? In our new video, Florian Fink (Omicron) shows us how it's done. Enjoy watching! Warm wishes, Your EEA-Team
How To Calculate Zero Currents Properly (Part 2)
มุมมอง 3032 ปีที่แล้ว
Welcome, dear friends of protection, control and electrical engineering. In our new video, we show you how to calculate the ground fault engineering for your network. For the calculation we use RelaisSim-Test from Omicron. We model the primary network, add current and voltage transformers, add protection IED's and measuring points and carry out a final analysis of the capacitive earth fault cur...
How To Calculate Zero Currents Properly? (Part 1)
มุมมอง 4962 ปีที่แล้ว
Welcome, dear friends of protection, control and electrical engineering. In our new video, we show you how to calculate the ground fault engineering for your network. For the calculation we use RelaisSim-Test from Omicron. We model the primary network, add current and voltage transformers, add protection IED's and measuring points and carry out a final analysis of the capacitive earth fault cur...
WIC1 - faster than your airbag ?
มุมมอง 3312 ปีที่แล้ว
A warm welcome, dear friends of protection, control and electrical engineering. The new WIC1 from SEG Electronics is faster than your airbag. We are skeptical and will check it out today. Warm wishes and have fun watching, Your EEA-Team
Load Cutout for Distance Protection?
มุมมอง 7182 ปีที่แล้ว
A warm welcome, dear friends of protection, control and electrical engineering. In today's video we look at the load cutout for distance polygon. Why is there a load cutout, what is it and how is it configured? Have fun watching and warm wishes Your EEA-TEAM
Testing Self-Powered Relays?
มุมมอง 7832 ปีที่แล้ว
A warm welcome, dear friends of protection, control and electrical engineering. In our new video, Josef Schmidbauer (OMICRON) gives us an exciting insight into the special features of testing Self-Powered Relays. Enjoy watching and good luck! Warm wishes, your EEA-TEAM further information: www.electrical-engineering.academy
Black Start Capable & Faster Than Your Airbag!
มุมมอง 1222 ปีที่แล้ว
Black Start Capable & Faster Than Your Airbag!
Residual Magnetism and Protection Systems
มุมมอง 1.9K2 ปีที่แล้ว
Residual Magnetism and Protection Systems
Circuit Breaker Testing During Operation
มุมมอง 4493 ปีที่แล้ว
Circuit Breaker Testing During Operation
Testing Power Quality Analyzers - Part II
มุมมอง 3693 ปีที่แล้ว
Testing Power Quality Analyzers - Part II
Testing Power Quality Analyzers - Part I
มุมมอง 1.4K3 ปีที่แล้ว
Testing Power Quality Analyzers - Part I
How to draw Yd transformer vector groups within 3 minutes
มุมมอง 7K4 ปีที่แล้ว
How to draw Yd transformer vector groups within 3 minutes
Overcurrent vs. Differential for Line Protection
มุมมอง 43K4 ปีที่แล้ว
Overcurrent vs. Differential for Line Protection
How To Test Wattmetric Ground Fault Relays?
มุมมอง 2.1K4 ปีที่แล้ว
How To Test Wattmetric Ground Fault Relays?
Very high quality videos !
During this test should the CT make some noise?
The primary of the potential transformer is Star Solidly Earthed and secondary is Open Delta. My question: Since the Primary is solidly earthed, could we consider that this potential transformer is like an Earthing Transformer? Thank you
Can you explain your question closer and more detailed? Warm wishes!
Great video. We know this problems but no one wants to solve them.
Thank you for your feedback!
Thank you
Thank you for your feedback!
Very good
Thank you for your feedback!
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Transform Your Career with the IEC 61850 Masterclass! 🌐 🌟 Ready to take your industrial automation skills to the next level? Look no further! Our IEC 61850 Masterclass is here to revolutionize your understanding of the IEC 61850 standard. 🔧 Dive deep into the world of industrial automation with a comprehensive curriculum that goes beyond the basics. Master the skills needed to read and write data, control commands to Intelligent Electronic Devices (IEDs), and seamlessly integrate protocols into SCADA systems. 🛠 👩💼 What sets us apart? Hands-on learning with top-tier industrial simulators, proficiency in protocols like GOOSE, MMS, SV, and SNTP, and a focus on real-world applications. By the end of the course, you'll be a well-rounded professional equipped to tackle the complexities of industrial automation systems. 🌐 Ready to embark on this transformative journey? Enroll now and gain access to the most complete and advanced IEC 61850 standard course available online! 🔗 Enroll Here (www.udemy.com/course/iec61850-masterclass-fundamentals-to-programming) Don't miss out on the opportunity to elevate your skills and advance your career!
Very good. Thanks 🙏
Thank you for your feedback!
Also this is not a CT. It is a PT.
It is a current transformer (CT). You can argue it's a PT with short circuit on the secondary side. Thank you for your feedback.
Why does the narrator sound like he's drunk??
Because he is, we drink a lot beer here in Germany. ;-)
Hello! As we see on the diagram at 1:56 we connect our ac voltage source direct at secondary winding and we measure the current also on the secondary winding with ammeter. In this case we don’t have transformation of the voltage level so the magnetic core don’t interfere! But again we observe the saturation phenomenon. In my mind the proper procedure was to connect our supply on the primary winding and observe(measure) the secondary. Now i am thinking it’s like we power an individual resistance and measuring the current through it. Can you explain me why we still we reach to saturation whilst voltage level between primary and secondary don’t change? I hope you understand my concern!
Thank you for your question and sorry for the late answer, we just discovered your post. It's quit easy: In feeding the secondary winding you magnetize the core. Until the core is not able to absorb more flux. You reach the saturation and the voltage doest increase anymore like before. Warm wishes!
@@electricalengineeringacade5770 thanks a lot!
Excellent visualization 🙏
Thank you for your feedback!
Nice
Thank you for your feedback!
I do not get the explanation in English, so I do not get why so why relays have an extra time delay of 300 ms with respect to others. I understand that a relay needs approx. 30 ms to sense the fault and provide the signal + the approx. 60 ms that needs a circuit breaker to trip. But please, coulde you explain me why comes into consideration this 300 ms extra time delay for some relays that adds up to 900 ms extra time delay for the relays located near to the primary power supplies?
We always respect 250 ms till 300 ms. Otherwise the relay will kill it and not fall back. Even digital relays have to be treated like that. No chance otherwise. Warm wishes!
I am sorry, but this video is not correct. The output of a broken-delta is 3U0. I have verified this result via circuit simulation and with White Papers from Schweitzer Engineering Laboratories.
For example, how can you say it is not 3 times the zero sequence voltage? Please consider trivial circuit analysis with proper polarity for a delta connection. Via trivial circuit analysis, the delta winding mesh voltage is Va + Vb + Vc. This trivial result is clearly 3*V0, by DEFINITION of V0. You do not need vector analysis. Please correct the video.
Thank you for your feedback! It is correct. I understand your argument, but this is the trap that a lot of engineers fall in, even SEL in this case. There can only be one secondary zero sequence voltage. Calculated on the star winding you get 57,7 V. This is U0. When U0 = 57,7 than we have to declare 100 Volt is the 1,7321 fold of U0. You have to see this in context. If you declare the delta windings to god, than you are right. But then you have two different secondery zero sequence voltages (57,7 V and 33,3 V) one for the star- and one for the delta winding. This is odd. Dont't do that. Otherwise you could say there are two different secondary phase to earth voltages, which also wouldn't make sense. I know, its hard to understand ;-) Warm wishes!
electricalengineering0001.blogspot.com/2023/06/working-principle-of-current.html
Where do I find the excel tool?
www.electrical-engineering.academy/downloads
I have a question. The phase/ground amplitude must be 33,3 V at the beginning. When a ground fault occurs, the vectors becomes 57,7 V. After that sum the vectors by 57,7 with 120 degrees and you have 100 volt. This means that U0 is 33,3 V, not 57,7 V. I'm I right??
Absolutely correct. U0 is 33,3, which means that Uen is actually 3*U0! This video is not correct.
@@tarekyared4404 Thx my friend
No U0 ist 57,7 Volt.
By the way: In case of an ground fault the angle shifts from 120 degrees to 60 degrees ;-) Warm wishes!
❤
Thank you for your feedback!
At POWERGRID we use CT Analyzer. Best performance and accuracy.
Thank you for your feedback! Yes, they are very good devices.
Very good. Thanks 🙏🙏🙏🙏
Thank you for your feedback!
Is it possible to get ripple voltage from a voltage transformer? We have a TRENCH VEOT 132 kV voltage transformer which feeds a REF630 (for frequency 50HZ protection). After tripping the disturbance recorder showed that ripple voltage ocured at the moment of tripping.
What you see are classical transient changes of your energy system. The VT doesn't cause this phenomenon. Warm wishes.
Hi, I like your video. Thanks
Thank you for your feedback!
Thankអរគុណបង
I like the jackhammer route No more saturation!
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Thanks for clarifying how a CT works. Can you please do me a favor by kindly providing me the title of the background music used in this video. Thanks
No.
The song's name is "eyored - Wstawaj".
Good explanation
Amazing!
Danke! The video is very cognitive!
Thank you. This really helped me understand the broken delta voltage detector.
Very good. Thanks 🙏🙏🙏🙏🙏
What if you just lose one phase due to fuse filure. IMO then there is no shift in neutral. But we will stil meassure voltage from da dn, and it should be -Voltage of broken phase?
That's the huge difference in using the broken delta windings vs. the star windings in order to measure/calculate the zero sequence voltages. But in this case you also don't have to worry, modern relays come with fuse failure monitoring and are able to distinguish between real faults or secondary problems... warm wishes, your EEA Team
Great video , what if a high impedance or partial ground fault would occur on U-PG1 ? would the voltage rise to sqrt(3) U-PG2 and U-PG3 vectors include the potential difference from U-PG1 to earth as it is not 0 ? what would be the Ue or Uo value be in this case ? as an example, U-PG1 was reduced to 50% of its un-faulted value.
Hi everyone. Great video. i have some doubts regarding a system with the following characteristics: Ground Resistance Transformer star-open delta (with resistor). Primary: 6,6kV / Secondary: unknown voltage. Main network voltage is 11kV, we have a 11kV/6,6kV transformer to supply a switchboard 6,6kV that will supply 2 massive cranes. We also have a 6,6kV generator to supply the cranes in case of power failure. The idea is to avoid the installation having to swap from the network neutral to the generator neutral. What should be the power rating for the GRT (Ground Resistance Transformer) ? What should be the voltage ratio of the GRT ? What should be the value of resistance in ohms for the resistance in the secondary side with the open triangle ? What should be the desired short circuit current in the primary side neutral (of the GRT) ? What should be the current ratio of the associated current transformer ? Hope you can help. Regards to all
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