345 kV cable buyers in New York

Overhead 345 kV: the bundle and everything above it

A 345 kV phase is normally two sub-conductors rather than one. The pair is spaced by bundle spacers at intervals along the span, held at the structure by suspension assemblies with armour rods, and tensioned by pullers and tensioners so the conductor never touches the ground during stringing. That method is why removed 345 kV conductor is usually straight and why new surplus usually has factory-sealed ends and a clean tag — and equally why conductor that was dropped or dragged is obvious to a buyer.

The conductor sizes are the familiar ones: 954 kcmil Cardinal in 54/7, 795 kcmil Drake in 26/7, and 1,272 kcmil Bittern in 45/7 where a river or valley crossing demands it. Where a line has been uprated, ACSS or a high-temperature construction may have replaced the original ACSR on the same structures, and drums from that work are worth more than the same weight of older conductor.

Above the phases sits the shield wire, increasingly OPGW with 24 to 48 fibers and a splice at every tension structure. A 345 kV rebuild produces all of this at once, and the lot is only as good as the seller's willingness to keep it sorted.

• Code name and stranding per drum, with footage from the tag
• Spacers, dampers and armour rods counted as sets rather than weighed
• OPGW fiber count and reel length, with sealed ends
• Insulator strings by material and condition
• New surplus kept apart from removed conductor

City 345 kV: high-pressure fluid-filled pipe

A high-pressure fluid-filled circuit is a cable inside a pipeline. The cable is paper-insulated copper, taped and vacuum-impregnated, with a large segmental or compact conductor; the pipe is welded steel, coated on the outside and protected cathodically; and the void between cable and pipe is filled with degassed dielectric fluid held under pressure by a pumping plant. Potheads at each end bring the conductor out through a sealed housing, and pressure and flow monitoring is part of the protection scheme, because a sudden loss of fluid is a fault signature.

That construction is why retirement is planned rather than incidental. The fluid has to be drained and handled, the pipe has to be cut and lifted, the cable has to be pulled, and the terminal equipment has to be either preserved as spares or dismantled. It is also why the material is so often sold cheaply: the seller sees a heavy, wet, awkward object with a disposal cost attached, and the buyer sees a large quantity of copper, several tons of steel pipe and a set of terminal hardware that somebody with the same design will want.

Why 345 kV is the most commonly undervalued material in the yard

Three things push it down. First, weight: a 345 kV reel or a pipe section is heavy, and heavy material attracts weight-based offers, which is the wrong measure for a product defined by footage and construction. Second, documentation: the tag, the test record and the oil history are usually in a file that gets closed when the project does, and material separated from its paperwork loses most of its premium. Third, handling: few buyers can move a large steel reel or a pipe section, so the seller's choice is narrow and the price reflects it.

The counter-argument is straightforward. A tagged drum of 954 kcmil conductor is a line-store item that a contractor will pay material money for, and a retired pipe-type circuit contains copper at a scale that no other cable class in the state matches. Neither should be sold on a bathroom scale, and neither should be sold before the documents have been looked for.

The documents that actually change the number

For overhead material, the reel tag is the asset. It gives the construction, the code name, the length and often the purchase order, and it converts a drum of wire into a specific product. Running footage or sequential length marking on the conductor itself is the next best thing, because it lets a buyer calculate what is left after a partial pull without trusting a hand-written note.

For pipe-type cable, the paperwork is different and heavier. Fluid type and volume, the results of fluid tests, the pressure history, the as-built route drawings and the factory test records together describe a system rather than a length of cable. Factory routine tests on this class of cable include partial discharge and AC withstand measurements, and field commissioning tests were run after installation; both are worth having, and their absence is not fatal but it does move the material toward recovery value.