Electronic Switches

[rcdallas]

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[Pootnaigle]

In my final years at Entergy they began using a series of electronic ORs that were linked to one another thru a radio wave. If a fault occurred between em 2 of em would open and a normally open would close to minimize both the duration and number of customers affectd. All this happened in a matter of seconds since they all were linked via radio signal. It goes without saying that all of em were installed along trunk feeders and none on taps or laterals. Actually worked quite well. But you were always left with a section out.This usually required a line crew to make some repairs.

[Trbl639]

In my final years at Entergy they began using a series of electronic ORs that were linked to one another thru a radio wave. If a fault occurred between em 2 of em would open and a normally open would close to minimize both the duration and number of customers affectd. All this happened in a matter of seconds since they all were linked via radio signal. It goes without saying that all of em were installed along trunk feeders and none on taps or laterals. Actually worked quite well. But you were always left with a section out.This usually required a line crew to make some repairs.

What Poot said!!!

[shaun]

In my final years at Entergy they began using a series of electronic ORs that were linked to one another thru a radio wave. If a fault occurred between em 2 of em would open and a normally open would close to minimize both the duration and number of customers affectd. All this happened in a matter of seconds since they all were linked via radio signal. It goes without saying that all of em were installed along trunk feeders and none on taps or laterals. Actually worked quite well. But you were always left with a section out.This usually required a line crew to make some repairs.

When you say radio wave, is that Ma Bell? (phone co) This sounds like a typical loop that's SCADA. Set up by phone. ben around for the last ?? years. But, I'm not sure what IntelliTeam is. Is this something new? Yours sounds like sectionaling through reclosures. Isolate the fault with minimal effct to the costumer. Sorry for the stupid question. Still learning.

[topgroove]

our system at grid uses a encrypted digital radio feed over the air. if you look closely at our reclosers you'll see a small antenna . the controll center transmits the encrypted packet, the recloser reconizes the packet and decrypts it and than opperates. one thing you all should be carefull of is the loop schemes.

[Trbl639]

Some of the Sacada systems Entergy uses were thru the Ma Bell system and sometimes worked and sometimes didn't, others were like Poot said, these were Radio type systems, over the open air...........

[rcdallas]

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[Pootnaigle]

Ummmm right we used a radio signal to keep em all in touch with one another not a phone line( which could be affected by the same problem that caused the fault) Theres an antanne on each sectionalizer pole that continually talks to the others via radio .when sumpin happens that signal changes and stuff starts to happen to isolate it accordingly. For this to work it is mandatory that the reclosers can sense and react to current flow from either direction......... I mite a left that part out.

[Trbl639]

Might be wrong here, but someone told me once about them systems, and what used to be a 30 minute job to replace a bad insulator has turned into a major ordeal..........something about having to get a 'one shot' on all of those reclosers, instead of just one..........

[jaxtaz]

I know in florida when we are working on a feeder we get the one shot and disable the a switchs around us. This is to make sure if something goes wrong the system won't heat the line up while working on it. This is all done by dispatch.

[Trbl639]

I know in florida when we are working on a feeder we get the one shot and disable the a switchs around us. This is to make sure if something goes wrong the system won't heat the line up while working on it. This is all done by dispatch.

Never worked around em, didn't have any in my AO, but was told something like that, couldn't remember exactly what...thanks!

[Pootnaigle]

Might be wrong here, but someone told me once about them systems, and what used to be a 30 minute job to replace a bad insulator has turned into a major ordeal..........something about having to get a 'one shot' on all of those reclosers, instead of just one..........

Ummm nah wasnt that bad jus hadda disable the ones on either side of ya, left the others functional and allowed you to work with a hold tag or 1 shot on your project.