dogman

[dogman]

We have a double circuit 4/0 T2, that we our putting on larger poles. It has 10 ft. arms on top, with 4 conductors. 8 ft. arms on bottom with 2 conductors. My question is how do I put the 2 conductors on the top, and the 4 on the bottm when we change out the poles.

[Mike-E]

what voltage? is this done hot?

[jafl]

hey would u try to explain that a little better for me. are they looking to put the bottom circuit on top and the top circuit on the bottom kinda make it the opposite of what it is now?

[Meat]

Wing out lower circuit(probably all of it)frame lower arm on new pole.Cut old upper circuit crossarm as you lower down phases one at a time. Cut the old pole's top out , frame upper arm and fly them up. It seemed to work in my head unless I'm missing something. Dead and grounded would be too easy.Meat!

[lewy]

I agree more information would be nice, but the way I understand it you have 1 circuit on each side of the pole . Why does it matter whether you have 2 phase on top & 1 on the bottom or vice versa? Any thought of going to armless construction?

[jafl]

another thing would any of your phases phase together if they did there would be a couple of ways u could do this job

[Meat]

Thats what I was trying to avoid but I don't have all the info. either. I was just taking a stab at it. Sounds like fun either way.

[johnbellamy]

2 hot arms, 2 handlines, two link sticks, 2 temp cond. support. 1 snubin knuckle.


10 ft arm has A + C -A + C. 8ft arm B + B.

Put hot arms on lower 8ft arm, Spead outer A + C to hot arms, move inner C+A to TCS on 10 ft arm where A+C were.

Spread B's to inner position on hot arm.

Set taller pole. Mount 8' arm, transfer C+A out of TCS to new 8' arm.

Remove old 10' arm, top pole.

Off new 8' arm rig your two handline's with link sticks, put knuckle on new pole. Pick both B's one at a time, pull them up and snub them off, above where you will frame new 10' arm.

Mount new 10' arm, transfer both B's to new arm, then transfer A + C out of hot arms to new 10' arm.

Remove hot arms, remove old 8' arm, Piece out old pole, remove old pole butt.

New 8' arm has C + A. (Upper)

New 10' arm has A + B, B + C. (Lower)

It seem's odd to build that constuction, but to each there own.

[dogman]

Voltage is 7200 phase to ground, it does phase together. I can kill 1 circuit out, and feed it off of the other one. Reason, we are losing poles when it gets windy. Engineers think that moving the 4 wires down and pu tting the 2 on top will help. I do not think it would make a difference. New larger poles, 2 miles to changeout. Just looking for a few different ideas. Thanks, Dogman

[loodvig]

Why not just guy the poles?

[Boomer gone soft]

If the two circuits phase, why not simply remove one and just reconductor with larger wire?

Another option could be to simply lean the poles out of the way?

[lewy]

I agree having 2 on top & 1 on the bottom or the other way around will not have much of an effect. How much sag in the line? Also if you are going to higher poles, armless construction will eliminate some of your wind problem & easier to work on. We have 5' between phases & depending on what you have now between your arms it would not be hard to do.

[dogman]

Larger poles, not higher. Farm land so guying it would not work. Dogman

[Phoenix-7]

Voltage is 7200 phase to ground, it does phase together. I can kill 1 circuit out, and feed it off of the other one. Reason, we are losing poles when it gets windy. Engineers think that moving the 4 wires down and pu tting the 2 on top will help. I do not think it would make a difference. New larger poles, 2 miles to changeout. Just looking for a few different ideas. Thanks, Dogman

How deep are you putting these poles?
Any storm guys,what class of pole?

[lewy]

How tall are the poles?
Whats the sag like?
If your only option is to move 1 phase to the top & have 2 phases on the bottom move 1 side dead & then switch it around & move the other side dead. I am guessing you can get trucks to the poles as you should not work 12kv alive off of the pole.

[Edge]

why not just built that bastard bundle on double 10ft arms... or vertical hendrix style? theres a bunch of places here on the East Coast that do that kinda thing.

other wise JB's description sounds pretty straight forward if your sticking if your glovin I would think it would be a cake walk..float the outside top up and let the inside top drop to the inside positions on the new pole I do like the idae of just tying the circuits togeather and pulling in heavier conductor...for 2 miles it seems to make sence then you can have you 3and1's where the circuit splits... but maybe there's a load issue or cost factor that we don't see

for what it's worth

Edge

get high or die climbing

[johnbellamy]

Most double circuits are designed to have an express feed for one circuit, The problem with killing one circuit, is you have to cut over all the banks and taps to one feeder, jumpering like that makes those poles awful busy.

Reconductor with just one larger feed doesn't allow you to do this. Split the load for reliability issues, probably why the double circuit is there.

You say it goes through farm land, probably alot of banks for irrigation, is one circuit dedicated to feed some big industrial accounts, or even a small town?

5' taller poles would make your life alot easier, don't know if your glovin or stickin, don't think your engineer's solution will solve anything, but it's always nice to see new wood in the air.

[Phoenix-7]

Larger poles, not higher. Farm land so guying it would not work. DogmanGet the utility to buy some easements onto the farm land, its not cheap, but alot safer in the long run.
Engineering dept. hates spending money unless its for themselves!!!