Paid on pickup
Delta and Wye: What the Connection Actually Does
A working guide for Ohio sellers: what decides the number and how the unit leaves.
What we buy
What we buy here
Most of what matters about Delta and Wye: What the Connection Actually Does can be settled before anybody picks up a wrench. A seller should keep the photographs after the sale, because the next buyer will ask for the same ones. A yard with a dozen units in it is a record of what Ohio plants have been replacing.
If you do only one thing, photograph the nameplate and the cabinet in good light. Nothing about a transformer improves by waiting, and the oil in particular gets worse rather than better. The difference between a good and a bad purchase is usually information rather than luck.
Who we buy from
Six kinds of seller, one desk
- Recyclers
- Electrical contractors
- Equipment dealers
- End users
- Demo contractors
- Distributors
Fast offers
A nameplate photo is usually enough to price a unit the same day.
Dedicated logistics
We arrange the crane, the permits and the flatbed, not you.
No broker fees
You are dealing with the buyer, so nothing is shaved off the offer.
How it works
Six steps from your yard to the money
- 01
Take pictures
The nameplate, the cabinet interior and the tank in daylight. Three photographs are usually enough to place a unit in the right class and the right price band.
- 02
Send them to us
The form on this page, a text or an email all reach the same desk. Include the city, the access and any deadline the site is working to.
- 03
Review the offer
A buyer reads the photographs, asks one or two questions and sends a written offer with the assumptions stated, so nothing changes on the day.
- 04
We schedule freight
Crane, flatbed and permits are booked around your access. You get a date and a window, and we carry the cost of getting it right.
- 05
Testing on arrival
Winding resistance, megger and turns ratio, plus oil analysis where the unit is liquid filled. The results decide the final number, and you see them.
- 06
Get paid
Payment is released on the agreed terms once the unit is received and tested, by check or ACH. No retention, no sixty-day terms.
What we handle for you
The parts sellers dread, done for you
Rigging
Crane and forklift arranged around your access, not the other way round.
Oil containment
Bunds, absorbent and disposal handled before the unit moves.
Bill of sale
A clean title document for your records, signed on collection.
PCB paperwork
Pre-1979 units get the testing and the manifest they need.
Guide
The two connections
A delta connection joins the three windings end to end with no neutral, so it provides three wires and no fourth. A wye connection joins one end of each winding at a neutral point, so it provides three phases and a neutral. A grounded wye gives you 480Y/277, which is what most commercial and industrial services actually use.
A unit that has been in service is a known quantity, and a unit that has been idle is a question. A unit that came out of a working plant is almost always the better buy, and sellers rarely realise it.
Why it matters at the load
A 480 delta secondary cannot supply 277-volt lighting without a separate transformer, because there is no neutral to reference. A 480Y secondary supplies both 480-volt three-phase and 277-volt single-phase from the same unit. A plant that needs both will specify a wye, and a delta unit is the wrong purchase no matter how good the condition.
A buyer who turns up with a torch and a tape measure is not there to argue about the paint. A buyer's first question is about the rating and the second is about the access, in that order.
On the primary side
A delta primary tolerates a single-phase fault without the same ground current a wye primary would produce. A wye primary is common on utility systems because it gives a grounded source for protection. Some units are built with a delta primary and a wye secondary, which is the most common distribution arrangement in Ohio.
Reading the tag
Checklist for delta and wye: what the connection actually does
Questions about delta and wye: what the connection actually does
Related guides
Get started
Get an offer in minutes
Five fields and a phone number is all we need to start. We reply the same business day, and a firm number follows the nameplate photo.
(614) 715-3047or send the form and we will call you.
Questions
What sellers ask before they call
Equipment types
Does delta and wye: what the connection actually does change what a transformer is worth?
A delta primary tolerates a single-phase fault without the same ground current a wye primary would produce. Some units are built with a delta primary and a wye secondary, which is the most common distribution arrangement in Ohio.
Service area
Where does a seller start with delta and wye: what the connection actually does?
A wye connection joins one end of each winding at a neutral point, so it provides three phases and a neutral. A decommissioning is orderly, which makes it the easiest kind of large project to buy from.
Payment
Is delta and wye: what the connection actually does part of what a buyer checks on site?
A slash means the winding can be reconnected, so 12470/7200Y describes a unit that can serve either connection. A letter alone means the connection is fixed, and that is the figure a buyer needs before committing.
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