Used Square D Equipment for Sale

Who Square D isSquare D is an American manufacturer of electrical equipment headquartered in Andover, Massachusetts. The company was founded on December 15, 1902, by Bryson Dexter Horton and James B. McCarthy, and it is now a flagship brand of Schneider Electric, which acquired the company in 1991. Square D products are used in industrial, commercial, and residential power distribution across North and South America.

What they are known forSquare D is best known for switchgear, circuit breakers, panelboards, and transformers. In the used-equipment market, their low-voltage dry-type distribution transformers are common, particularly three-phase units in standard kVA ratings such as 45 kVA. These transformers step voltage down or up for industrial loads and are often specified alongside other Square D equipment for coordinated protection.

Transformer lines buyers search forSquare D offers several dry-type transformer series, including the DOE 2016-compliant EX and EXN lines. These are available in single-phase and three-phase configurations with standard kVA ratings. Three-phase low-voltage transformers come in ratings including 3, 6, 9, 15, 30, 45, 75, 112.5, 150, 225, 300, 500, and 750 kVA. The EX series is designed for energy efficiency and low sound levels, with terminals sized to match Square D circuit breakers and panelboards.

What to check when buying usedWhen evaluating a used Square D transformer, confirm the nameplate kVA, primary and secondary voltages, phase, and temperature rise. Inspect the windings for signs of overheating, moisture, or physical damage. Check the enclosure type and condition, as some units are indoor-rated and may need a weather shield for outdoor use. Verify that taps and terminal connections are intact and that the unit has not been exposed to corrosive environments. If the transformer is oil-filled, check for leaks; dry-type units should be checked for dust accumulation and blocked ventilation.

Service and parts supportSquare D is part of Schneider Electric, which provides documentation, replacement parts, and service support through its distribution network. Before buying, confirm the specific model number and whether compatible accessories, such as mounting brackets or weather shields, are still available. For discontinued models, third-party suppliers may carry replacement components, but availability can vary.

Matching a transformer to your applicationUsed Square D transformers can be a cost-effective option for industrial power distribution, but the unit must match your voltage, kVA, and impedance requirements. Review the nameplate and any available test data, and consult a qualified electrician to ensure the transformer meets local code and your load profile.

Meadoworks is your trusted source for used Square D equipment. As third-generation industrial equipment dealers and AMEA-certified appraisers with over 50 years of experience, we offer quality-inspected Square D machines at competitive prices. Most of our Square D inventory sells before we can list it online — call 800-323-0307 for equipment not yet listed.

Every machine includes detailed specifications and high-resolution photos, and inspection visits are available for most equipment. We ship worldwide with experienced rigging partners and offer financing for qualified buyers. Have Square D equipment to sell? Get a free valuation or contact our team.