X1 and X3 tie?

[PA BEN]

Got a new spec for 3 phase transformer secondary hookups. We use to tie the transformers together at the bushings, then drop the legs down. Now the new spec tells us to make our ties below at the service level. Just curious to see where you guy tie yours together. Thanks.:D

[Stick-it]

I've always tied up at bushings and brought a single leg down to the service. If you tie at sec. level then it sounds like you may be in store for some rats nests.

[Koga]

the bushings. On new installations we usually use multi taps in the bushings and make up all the service leads to those. Our bus tie is run under the pots and tied in on a spool bolt. Did they give ya any reason why the change ?

Koga

[PA BEN]

the bushings. Did they give ya any reason why the change ?

Koga

To stay away from the high side, the H1 and H2. So we don't break the 2'3" rule. We said we don't work there anyway if it's hot. Cover the high side or kill it.;)

[graybeard]

We bring the leads down below the bottom of the tubs. Make the tub tails either 1/0 or 4/0 and make all the conections to those. Keeps you out of the primary area and you can work secondarys hot.

[JAKE]

we do it on the bushings too, i think down lower would look like crap

[42linehand]

We make our connections in Connecticut near the bushings.

[1st Class Husker]

We make our connections in Connecticut near the bushings.

We work at a REA, Here we make a short candy cane with usually 3/0 copper from x1-x3, so transformer lead brackets are not needed.
Candy canes are usually 8" then make your bend towards your other bushing.
Then strip a spot in the middle for your secondary lead to your weatherhead.
We do use a insulator adapter for on the back side, between the two wing pots!, Hope this helps:)

[BigClive]

From what I've read here there's no reason for us to change from making our ties at the bushings to below the transformer other then it's the way our engineer wants us to do it.:eek:

What's his background? Have you asked him specifically why he wants it done that way?

[mainline]

PA Ben I take it all of your cans are conventionals. So you must open the cutout then work the secondaries dead. It sounds safe to me if you can't touch a primary anyway. If you do do secondary work hot what do you wear class 0s. I know where I work we wear class 2s for everything, and if I got caught in the air with leathers on they would hang me. I can sympathize our engineers come up with the same stupid rules for really nebulous reasons.

[PA BEN]

PA Ben I take it all of your cans are conventionals. So you must open the cutout then work the secondaries dead. It sounds safe to me if you can't touch a primary anyway. If you do do secondary work hot what do you wear class 0s. I know where I work we wear class 2s for everything, and if I got caught in the air with leathers on they would hang me. I can sympathize our engineers come up with the same stupid rules for really nebulous reasons.

We don't work on or at the secondary bushings hot, not even check voltage because you break the 2 ft rule. So to make up our ties below the tank will not be natural for awhile until we get use to it.:o

[graybeard]

Seams really stupid to not makr the ties at the bushing and just bring tails down below the bottom of the tubs. Then you can make all the service conns. well below the 2 foot rule. Are you sure that this didn't come from a lawyer?