#electricity #highvoltage #substation A basic rundown on what a ultra high voltage circuit breaker does. These are opposite of most breakers in that the close spring is charged when the breaker trips.
What happens if there is a problem and there is no pressure to Trip the breaker? Will it just stay closed until something further down the line cooks and breaks the connection?
There are a few methods of protection. The one you mentioned is last ditch. There is an alarm if the air gets low. Someone will try to fix it if there's time. If the leak is too big/fast the breaker will trip below a certain point while it still has the ability to. If that fails, every breaker surrounding it will trip.
Very interesting video. Thank you for the explanation. I noticed that there doesn't seem to be any lines coming out of the other "rod" (sorry I don't know the names of these compartments. I am new to this and would love to learn) on the other side of the breaker. Could you tell me why this is? Or are these systems not in operation (yet)?
If you mean the timing rod that goes where the cover was taken off down low, that is placed there for the timing only, then removed. It moves in and out as the breaker trips and closes. If you mean the wires at the top of the breaker, they are removed on one side and grounded on both sides during testing. It will be replaced and grounds lifted before going back in to service.
@Stijn The grounds are for safety. We disconnect the lines on one side of the breaker in order to do the timing test. With the grounds connected, it's all one point electrically. That's ok on one side of the breaker, but in order to time each breaker contact on each pole as it makes the connection, we need to see them individually on at least one side. Then we can tell the time of each and the difference (delta) from the first one to connect from the last. The motion rods I mentioned provide velocity information. We will time the trip (open) the close and the trip-free (close-open), which simulates closing into a fault... the breaker is given a close command and immediately opens. During that last scenario, we look at the overall time and the "dwell" time... how long the contacts are electrically connected before parting again.
Cool to see other substation videos up on TH-cam. Yeah, not a fan of the air trip breakers. Used to work on HVB air trip breakers, never really had any issues with them. Just not a fan of compressed air for the stored energy to trip. The closing action charging a spring, like most breakers, is much better. I do have a video I made when testing one, when tripping. (other sub videos too) th-cam.com/video/VdHUqhaN6TY/w-d-xo.html
Agree 100%! It just goes in opposition of everything I've ever learned about a breaker... it's last ditch energy spent is supposed to be tripping the "breaker"... it's in the name, it's ultimate purpose is to break current. It seems like those HVB's were not designed that way. We didn't have problems with the breaker operation, but the compressors die over time and they're not supported anymore, so 1 by 1 the hyosung air compressors have been replaced with Jennys' as they fail.
Cool video! I love to learn new things.
Thanks, I'm glad you enjoyed it 👍
I worked at a siemens site which made this type of equipment. Pretty amazing!
What happens if there is a problem and there is no pressure to Trip the breaker? Will it just stay closed until something further down the line cooks and breaks the connection?
There are a few methods of protection. The one you mentioned is last ditch. There is an alarm if the air gets low. Someone will try to fix it if there's time. If the leak is too big/fast the breaker will trip below a certain point while it still has the ability to. If that fails, every breaker surrounding it will trip.
Woowee I sure as heck wouldn't even want to be around any of that stuff. Not my idea of a pleasant environment.
Danger all around for sure. We do pretty good at keeping it safe, but the margin for error is definitely small.
Very interesting video. Thank you for the explanation.
I noticed that there doesn't seem to be any lines coming out of the other "rod" (sorry I don't know the names of these compartments. I am new to this and would love to learn) on the other side of the breaker. Could you tell me why this is? Or are these systems not in operation (yet)?
If you mean the timing rod that goes where the cover was taken off down low, that is placed there for the timing only, then removed. It moves in and out as the breaker trips and closes.
If you mean the wires at the top of the breaker, they are removed on one side and grounded on both sides during testing. It will be replaced and grounds lifted before going back in to service.
@@reusefull Yes, I meant the second one. So it is for safety reasons? Thank you!
@Stijn The grounds are for safety. We disconnect the lines on one side of the breaker in order to do the timing test. With the grounds connected, it's all one point electrically. That's ok on one side of the breaker, but in order to time each breaker contact on each pole as it makes the connection, we need to see them individually on at least one side. Then we can tell the time of each and the difference (delta) from the first one to connect from the last. The motion rods I mentioned provide velocity information.
We will time the trip (open) the close and the trip-free (close-open), which simulates closing into a fault... the breaker is given a close command and immediately opens. During that last scenario, we look at the overall time and the "dwell" time... how long the contacts are electrically connected before parting again.
@@reusefull That is very interesting. Thank you for the explanation. Looking forward to the next video.
Thanks for sharing!
Cool to see other substation videos up on TH-cam. Yeah, not a fan of the air trip breakers. Used to work on HVB air trip breakers, never really had any issues with them. Just not a fan of compressed air for the stored energy to trip. The closing action charging a spring, like most breakers, is much better. I do have a video I made when testing one, when tripping. (other sub videos too) th-cam.com/video/VdHUqhaN6TY/w-d-xo.html
Agree 100%! It just goes in opposition of everything I've ever learned about a breaker... it's last ditch energy spent is supposed to be tripping the "breaker"... it's in the name, it's ultimate purpose is to break current. It seems like those HVB's were not designed that way. We didn't have problems with the breaker operation, but the compressors die over time and they're not supported anymore, so 1 by 1 the hyosung air compressors have been replaced with Jennys' as they fail.
so basically this device disconnects two wires?
6 wires, but yup.