Sell a 3750 kVA Transformer From Your Texas Site
A 3750 kVA transformer has a rated capacity of 3.75 MVA, or megavolt-amperes. This three-phase size commonly serves large industrial loads, mining operations and solar or wind collection systems. Depending on its voltages and construction, it may supply a facility’s low-voltage distribution or connect medium-voltage equipment within a larger electrical system.
These units commonly appear as enclosed padmounts, unit substations paired with switchgear, or standalone substation transformers. We buy single units and whole lots, any brand, including equipment still in its crate and units removed after a failure. Our yard and office are at 6402 McGrew St, Houston, TX 77087, and we coordinate trucking and pickup across Texas.
- Three-phase padmount transformers have enclosed cable compartments and are typically installed on an outdoor foundation.
- Unit substation equipment combines a transformer with associated incoming or outgoing electrical sections.
- Substation transformers may have exposed bushings, radiators and connection arrangements designed for a controlled-access installation.
| Voltage | Full-load amps | Typical role |
|---|---|---|
| 480 V | 4,511 A | Low-voltage secondary |
| 600 V | 3,608 A | Low-voltage secondary |
| 4,160 V | 520 A | Medium-voltage secondary |
| 12,470 V | 174 A | Distribution primary / secondary |
| 13,800 V | 157 A | Distribution primary / secondary |
| 24,940 V | 87 A | Distribution primary / secondary |
| 34,500 V | 63 A | Distribution primary / secondary |
Check any rating with the kVA to amps calculator.
3750 kVA Transformer Specs and Voltage Combinations
Useful 3750 kVA transformer specs start with the rated capacity, frequency, phase count and primary and secondary voltages. Primary voltage identifies the incoming side; secondary voltage identifies the outgoing side. Industrial configurations can include 12,470 V or 13,800 V primary with 480 V secondary, while medium-voltage applications may use 4,160 V secondary.
Collection-system equipment may pair a 24,940 V or 34,500 V system with a lower-voltage source or load. Do not assume the voltage combination from the installation alone: photograph the actual nameplate, including any tap settings. Winding connections, grounding arrangements and available taps help determine whether a unit fits another project.
For padmounts, identify dead-front construction, which uses insulated cable connections rather than exposed energized terminals, and loop-feed construction, which provides incoming and outgoing cable connections. Include impedance, the transformer’s opposition to current flow expressed as a percentage, because it affects fault current and suitability for parallel operation.
Full-Load Amps at 3750 kVA
Three-phase full-load current is calculated as kVA × 1000 ÷ (1.732 × volts), using line-to-line voltage. At 3750 kVA, that is approximately 4,511 A at 480 V, 520 A at 4,160 V, 174 A at 12,470 V and 157 A at 13,800 V. At 24,940 V and 34,500 V, the corresponding currents are about 87 A and 63 A.
The table below gives these full-load values by voltage. Buyers care because the current must suit the intended switchgear, bus, cables and protective equipment; a matching kVA rating alone does not establish compatibility. These figures describe rated loading, not available fault current or a recommended protective-device setting.
Use the transformer kVA-to-amps calculator to check another voltage. If the nameplate shows multiple capacity ratings, identify which rating applies before calculating current, and send a clear photo rather than relying on a handwritten summary.
What Affects Value and Demand for This Size
A used 3750 kVA transformer is evaluated by its voltage combination, construction, condition and completeness, not capacity alone. Intact bushings, cable compartments, radiators and accessories matter. Missing parts, leaks, fire damage or a known winding failure change the assessment, so describe them directly and include close-up photos.
Demand for this size depends on matching a project’s electrical requirements. A 3.75 MVA unit can be relevant to industrial service upgrades and renewable-energy collection, but voltage, impedance and connection style can narrow the potential fit. Similar capacity does not make two transformers interchangeable.
Service history and available test records help document what you are selling. Share existing electrical tests, oil reports and repair records without commissioning new work just for an initial inquiry. If your inventory includes nearby sizes, we also buy 3000 kVA transformers and 5000 kVA transformers.
Nameplate Details and Photos to Send
To help a 3750 kVA transformer buyer evaluate the unit, send one readable nameplate photo plus overall views from several sides. Photograph the connection compartments, bushings, radiators and visible damage where safely accessible. Our guide to reading a transformer nameplate explains where the important ratings appear.
Include manufacturer, serial number, manufacture date if listed, voltage ratings, phase, frequency, impedance, taps and cooling designation. ONAN means oil natural, air natural cooling; ONAF means oil natural, air forced cooling using fans. If both appear, send both capacity ratings and note whether the fans and controls are present.
Add quantity, Texas location, current installation status and whether each unit is working, retired or failed. Include the fluid designation and any existing PCB information; PCB refers to polychlorinated biphenyls, substances historically used in some electrical insulating fluids. Report available records rather than guessing from age or appearance.
Weight, Rigging and Trailer Planning
A transformer at this capacity needs a load-out plan based on the actual unit, not a generic weight estimate. The nameplate lists exact weights; send those entries with photos of the lifting points and base. Identify whether attached compartments or accessories will travel with the transformer or separately.
Trailer selection depends on verified shipping weight, overall dimensions, load distribution and access. Tell us about gates, overhead obstructions, pavement conditions and room for loading equipment. Rigging must account for designated lifting provisions and the unit’s configuration; photographs help establish what needs checking.
Disconnection and de-energizing stay with the seller or the seller's qualified electrical contractor. We coordinate freight and load-out with the seller, with price, payment terms and pickup details agreed in writing before anything is loaded.
Get an Offer for Your 3750 kVA Transformer
To sell a 3750 kVA transformer, call or text (951) 403-5738, email Industrial832@gmail.com, or submit your transformer for an offer. Start with the nameplate, overall photos, quantity, location and condition. We evaluate those details and respond with an offer.
For a lot, label the photos so each nameplate matches its unit. Mention project deadlines, site-access restrictions and available loading equipment when you inquire. That gives us the information needed to discuss the equipment and plan pickup.
Frequently asked questions
Is 3750 kVA the same as 3.75 MVA?
Yes. Both describe the same apparent-power capacity. Check whether 3750 kVA is the base cooling rating or a fan-assisted rating, since that distinction affects how another site can use the transformer.
Will you buy a failed 3750 kVA transformer?
Yes, we buy failed units. Describe the failure, known damage, missing components and any available test findings. Include photos showing the full unit and affected areas.
Does a 3750 kVA transformer always deliver 4,511 amps?
No. That approximate full-load current applies at 480 V three-phase. At 4,160 V, the same capacity corresponds to about 520 A; current depends on the voltage of the winding being evaluated.
Can I sell a unit substation with its switchgear attached?
Send photos of the complete assembly and identify which sections are included. Include separate nameplates for associated equipment so the offer and load-out discussion cover the intended scope.
Can I sell a 3750 kVA transformer still installed on a pad?
Yes. Send its installation status and access photos with your inquiry. The seller or qualified electrical contractor handles de-energizing and disconnection before the coordinated load-out.