The word DUCTER was registered by Evershed & Vignoles in 1908 - a shortened version of ‘conductor tester’ that has since evolved into an adjective; similar to HOOVERing a floor or MEGGERing an electrical cable. Evershed & Vignoles developed the original ‘Ducter’ and were one of the companies that evolved into Megger. Interestingly, Evershed & Vignoles also developed the World’s first high resistance ohmmeter in 1889.
Thanks! I've learned so much from forums, friends, and TH-cam over the years I'm really just trying to concentrate all that into a single resource here on the channel.
@testingtechtips Used your content to high pot a MV 15 Kv VCPW breaker today and it was a huge help. I have already recommended your content to others.
Awesome Job! Really enjoy it. Super helpful video with detailed explanation. Question1) If you have Ground Fault setting on the breaker, how do you defeat it to test LT, ST and Instantaneous? Question2) is Ir the same as In? I'm always confused. Thank you again.
Excellent questions and I wish I had more time to make videos for those sooner rather than later. To defeat ground fault, some trip units can have it blocked with a jumper or switch. For ones where that isn't an option, you need to pass the current in one phase and back through another in the opposite direction to cancel it out. Weird concept, it would be easier to explain on camera lol. In = frame rating. This is how much current the breaker's FRAME can carry continuously. Often the instantaneous rating is in multiples of In. Ir = the time-overcurrent setting of the trip unit or rating plug and can be adjusted with a dial or by replacing the rating plug. Often the short-time pickup is a multiple of the Ir. Ir MUST be less than or equal to In.
Hey Bro, What happened with the 2nd part of this testing for the ETU, and What website do you think is good to take training about Procedures for testing transformers and Protection Relays?.
Long story short, I changed companies and don't have the great shop space and piles of equipment to play with any more. I still plan to make more videos but it's a slow process getting this going with a 50+ hour/week job, family, hobbies, etc. I've heard mixed reviews about the Valence course over at relaytraining.com, saying mostly that it wasn't worth the high price tag. The "Relay Testing Handbook" is fantastic though. Never been to a relay training though and I'm almost entirely self-taught. If you're starting from scratch there aren't too many other options. The best transformer classes I've been to are from Doble, but they're also very expensive unless your employer is signed up with them. If there's interest, I can make some more "conceptual" relay videos but my issue is that I can't show how to actually use Protection Suite or RTS because of the wording in their EULA. Kind of a bummer.
Yeah, hooking contact sense up on a separate phase would probably make it time more accurately. I've never seen anyone do that in the field but it makes sense!
Well, sometimes phase overcurrent protection and ground overcurrent are protected by a single breaker. But there's a couple reasons to have them separate. #1, as usual, is cost. Not all circuits require GFCI protection and depending on the size of the breaker, it makes it 20%-100% more expensive per breaker. If you don't need GFCI protection, you can save a significant sum of money by not having it. In some instances, ground fault protection is only enabled on the main service entrance breaker and that protects most of the rest of the system from ground current. It also simplifies troubleshooting and repair if you have discrete parts that can be replaced. Surge protection is a different function entirely. If you have a large surge protection device or "TVSS" near the service entrance, that can protect the whole rest of the system from transients from one location, but like in your home it's easier and cheaper to have a small one for each piece of sensitive electronics you have plugged in.
@testingtechtips thanks for getting back to me. I need to run a 20 amp outlet where there is no ground and I would like to have surge protection as well since I'm in high lightning storm area. So I just have to get it all separately it seems.
Great job man, hope you keep doing these.
Thanks, will do!
The word DUCTER was registered by Evershed & Vignoles in 1908 - a shortened version of 'conductor tester' that has since evolved into an adjective
#facts
The word DUCTER was registered by Evershed & Vignoles in 1908 - a shortened version of ‘conductor tester’ that has since evolved into an adjective; similar to HOOVERing a floor or MEGGERing an electrical cable.
Evershed & Vignoles developed the original ‘Ducter’ and were one of the companies that evolved into Megger. Interestingly, Evershed & Vignoles also developed the World’s first high resistance ohmmeter in 1889.
Cool video. Previously a NETA IV. Not much on TH-cam about this stuff.
Thanks! I've learned so much from forums, friends, and TH-cam over the years I'm really just trying to concentrate all that into a single resource here on the channel.
Great explanation of curves!
Lots more guys struggle with than you would think just because no one's explained it in plain English.
Thank You
Happy to help!
Great content. Thank you.
Glad it was helpful!
@testingtechtips Used your content to high pot a MV 15 Kv VCPW breaker today and it was a huge help. I have already recommended your content to others.
Great video and content
Much appreciated
This is great!
Thanks!
Хорошее видео, спасибо
Thanks!
Great video
Awesome Job! Really enjoy it. Super helpful video with detailed explanation. Question1) If you have Ground Fault setting on the breaker, how do you defeat it to test LT, ST and Instantaneous? Question2) is Ir the same as In? I'm always confused. Thank you again.
Excellent questions and I wish I had more time to make videos for those sooner rather than later. To defeat ground fault, some trip units can have it blocked with a jumper or switch. For ones where that isn't an option, you need to pass the current in one phase and back through another in the opposite direction to cancel it out. Weird concept, it would be easier to explain on camera lol.
In = frame rating. This is how much current the breaker's FRAME can carry continuously. Often the instantaneous rating is in multiples of In. Ir = the time-overcurrent setting of the trip unit or rating plug and can be adjusted with a dial or by replacing the rating plug. Often the short-time pickup is a multiple of the Ir. Ir MUST be less than or equal to In.
@@testingtechtips I understand it's hard to explain sometimes. Thank you for your effort anyway. Keep it coming brother.
Hey Bro, What happened with the 2nd part of this testing for the ETU, and What website do you think is good to take training about Procedures for testing transformers and Protection Relays?.
Long story short, I changed companies and don't have the great shop space and piles of equipment to play with any more. I still plan to make more videos but it's a slow process getting this going with a 50+ hour/week job, family, hobbies, etc. I've heard mixed reviews about the Valence course over at relaytraining.com, saying mostly that it wasn't worth the high price tag. The "Relay Testing Handbook" is fantastic though. Never been to a relay training though and I'm almost entirely self-taught. If you're starting from scratch there aren't too many other options. The best transformer classes I've been to are from Doble, but they're also very expensive unless your employer is signed up with them.
If there's interest, I can make some more "conceptual" relay videos but my issue is that I can't show how to actually use Protection Suite or RTS because of the wording in their EULA. Kind of a bummer.
Just wondering would it make any difference in the timer reading if using contact sense instead of current sense in the magnetic trip test?
Yeah, hooking contact sense up on a separate phase would probably make it time more accurately. I've never seen anyone do that in the field but it makes sense!
This electric stuff bringing in a lot of different products. Why not have gfci surge protection and thermal magnetic protection all in one?
Well, sometimes phase overcurrent protection and ground overcurrent are protected by a single breaker. But there's a couple reasons to have them separate. #1, as usual, is cost. Not all circuits require GFCI protection and depending on the size of the breaker, it makes it 20%-100% more expensive per breaker. If you don't need GFCI protection, you can save a significant sum of money by not having it. In some instances, ground fault protection is only enabled on the main service entrance breaker and that protects most of the rest of the system from ground current. It also simplifies troubleshooting and repair if you have discrete parts that can be replaced.
Surge protection is a different function entirely. If you have a large surge protection device or "TVSS" near the service entrance, that can protect the whole rest of the system from transients from one location, but like in your home it's easier and cheaper to have a small one for each piece of sensitive electronics you have plugged in.
@testingtechtips thanks for getting back to me. I need to run a 20 amp outlet where there is no ground and I would like to have surge protection as well since I'm in high lightning storm area. So I just have to get it all separately it seems.
Great video, but rated current is not the nominal current
Good catch.
where to but the test equipment?
Are you in the USA? I can't really help if you're somewhere else in the world.