What we buy
Ranges we buy on this page
A 4.16 kV system serves medium-voltage motors and plant distribution, often inside facilities built around long-running industrial processes. This page covers identification, insulation, testing and removal of transformers connected to those systems across North Carolina.
| Phase | kVA | Voltage | Fluid |
|---|---|---|---|
| 1 or 3-phase | 25 - 20,000 kVA | 4.16 kV Class | Liquid or dry |
| 3-phase | 75 - 10,000 kVA | up to 34.5 kV | Liquid-filled |
Who we buy from
Six kinds of seller
- Recyclers
- Electrical contractors
- Equipment dealers
- End users
- Demo contractors
- Distributors
Fast offers
A written offer the same business day, based on your photographs.
Dedicated logistics
Our own crew, trailer and crane, not a brokered haul.
No broker fees
One buyer from first call to cleared pad, with nothing skimmed.
How it works
Six steps from photograph to payment
- 01
Take pictures
Photograph the nameplate, the inside of the cabinet and the tank from both ends. Four frames on a phone are enough to price most units.
- 02
Send them to us
Email or text the photographs with the site address and whether the unit is still energised. We reply the same business day with questions or a number.
- 03
Review the offer
The offer names the unit, the site, the price and the pickup window. It is written, dated and good for thirty days unless the unit changes hands.
- 04
We schedule freight
A crew, a trailer and a crane if the pad needs one. You get the date and the arrival window, and the site does not have to close for it.
- 05
Testing on arrival
Winding resistance, insulation resistance and a turns ratio check, plus oil analysis where the unit is liquid-filled. Results travel with the unit.
- 06
Get paid
Payment is released against the signed bill of sale and the scale ticket, by check or ACH, with the paperwork copy left on site.
What we handle
The parts sellers dread
Rigging
Crane, skates and a route survey for anything that will not roll onto a trailer.
Oil containment
Pans, absorbent and a spill plan before a drain plug is touched.
Bill of sale
A document that clears a lien, a lease or a bankruptcy file, not a handwritten note.
PCB paperwork
Testing and manifesting for pre-1979 oil, handled before the unit moves.
On the ground
The 4.16 kV Class class
The 4.16 kV designation describes a system voltage, not a complete transformer specification. A unit may step a higher distribution voltage down to a 4,160-volt motor bus, or take power from that bus for lower-voltage loads.
Both winding ratings must come from the nameplate, not the switchgear label.
Plant records sometimes group 4.16 kV equipment under a broader 5 kV equipment class. That shorthand does not establish the winding connection, tap range or insulation rating.
Record the kVA, frequency, impedance and connection diagram so a removed transformer can be distinguished from neighboring motor-control equipment.
Local reality
Where 4.16 kV Class equipment sits in North Carolina
Across the North Carolina Piedmont, older manufacturing plants retain 4.16 kV buses for large motors and internal distribution. Transformers may sit in fenced yards, indoor substations or attached electrical rooms.
The removal route often passes through additions built decades after the original transformer bay was put into service.
Paper mills and water plants also use 4.16 kV systems where process motors justify medium-voltage distribution. A retired transformer can remain beside energized pumps, fan drives or mill auxiliaries.
Identify the actual isolation boundary before planning removal; an idle production line does not establish that its transformer is disconnected.
Around the site
Insulation, BIL and clearance
BIL around 60 kV is common for the relevant 5 kV insulation class, but the transformer nameplate and original drawings govern. Basic impulse insulation level describes impulse withstand capability, not operating voltage.
A 4,160-volt winding designation alone cannot confirm the condition of bushings, barriers or cable terminations.
In existing 4.16 kV installations, switchgear is usually the clearance constraint rather than the transformer itself. Cable compartments, bus transitions and door swing can dictate working space and extraction access.
Check the installed arrangement against drawings and applicable requirements instead of assuming a transformer footprint establishes adequate clearance.
Where it sits
Testing at this voltage
For a disconnected 4.16 kV transformer, useful records include turns ratio, winding resistance and insulation resistance results, with test temperature and tap position recorded. Qualified personnel should select the test procedure for the construction and condition.
A single insulation resistance reading does not establish that a failed winding is serviceable.
On liquid-filled units serving a 4.16 kV bus, oil test reports and dissolved gas results can help explain overheating, arcing or moisture concerns. Dry-type units need inspection of winding surfaces, tracking and cooling passages.
Preserve relay targets and trip records before a demolition crew removes associated control wiring.
On the ground
Transport and handling
A 4.16 kV winding rating does not predict shipping weight. Use the nameplate, outline drawing or verified weighing record to plan the crane and trailer.
Tank dimensions, radiators and terminal chambers determine the load envelope; oil condition and containment requirements affect preparation for movement from the plant yard.
At Piedmont plants with narrow service roads, a lowboy may need a different route than the crane used at the transformer pad. Confirm lifting points, overhead pipe racks and pavement capacity before mobilization.
A spreader bar may be needed to keep slings clear of bushings and removable radiator assemblies.
Local reality
What changes the value
For a 4.16 kV unit, the assessment depends on kVA, winding configuration, construction and documented condition, not voltage alone. A complete nameplate and recent test report support a clearer evaluation.
Missing bushings, cut leads, fire damage or a cracked tank change the possible disposition of the equipment after removal.
Environmental records matter for older liquid-filled transformers from North Carolina mills and manufacturing sites. Provide available PCB analytical results, oil handling records and spill documentation. Do not infer PCB status from age or appearance.
A known winding fault should be described separately from missing accessories or damage caused during dismantling.
Around the site
Starting a sale
Transformer Buyers NC buys used, surplus, failed and obsolete 4.16 kV class transformers anywhere in North Carolina. Initial information should include readable nameplate photographs, all-side views, terminal compartment details and the site location.
State whether the unit remains connected, has been isolated or already sits on a staging pad.
Before scheduling removal from a water plant or mill, establish ownership, release authority and the responsible electrical contractor. Include access restrictions, outage requirements and available lifting records with the equipment description.
Bankruptcy trustees and demolition contractors should identify who can authorize transfer and who controls entry to the transformer bay.
Get started
Get an offer in minutes
Five fields is all it takes. Photographs help, but a nameplate and a town are enough to start.
No fee, no obligation. We reply the same business day.
Tell us what you have
We reply the same business day.
Questions
Straight answers
Equipment types
Is 4.16 kV the same as 5 kV class?
Not exactly. A 4.16 kV rating identifies a nominal system or winding voltage, while 5 kV class commonly describes equipment insulation classification. Verify both winding voltages and the specified BIL on the transformer nameplate or original documentation before describing the unit.
Service area
Can you buy a failed 4.16 kV transformer?
Yes. Transformer Buyers NC buys failed 4.16 kV transformers across North Carolina. Describe the trip event, visible damage and any completed testing. Include photographs of the tank or enclosure, bushings and nameplate, plus available oil analysis for liquid-filled equipment.
Payment
What records help plan a water plant removal?
Provide the 4.16 kV transformer outline drawing, verified weight, isolation documentation and site access plan. Identify nearby operating pumps and energized switchgear. Oil analysis and ownership authorization are also useful, especially where removal must fit a limited outage without interrupting treatment operations.
Logistics
Testing at this voltage: what should a seller know?
For a disconnected 4.16 kV transformer, useful records include turns ratio, winding resistance and insulation resistance results, with test temperature and tap position recorded. Qualified personnel should select the test procedure for the construction and condition.