37.5 kVA Transformers Transformers

On the ground

The 37.5 kVA class

A 37.5 kVA nameplate identifies apparent power capacity, not the building's measured demand. On a single-phase padmount, the rating belongs with the primary voltage, secondary voltage and cooling designation.

Photograph the entire plate before weathering or removal makes small stamped characters unreadable.

For a church service replacement in North Carolina, confirm that the retired tank actually carries a 37.5 kVA rating. Cabinet size alone cannot establish capacity. Record the manufacturer, serial number and manufacture date so the equipment description follows the unit through removal.

Local reality

Typical North Carolina applications

A single-phase 37.5 kVA padmount can serve a small commercial building or a church with modest electrical demand.

In North Carolina, establish whether the unit belongs to the property owner or serving utility before arranging removal; location on private property does not establish ownership.

At a church renovation or small commercial demolition, compare the 37.5 kVA nameplate with the electrical drawings and service records. A contractor should distinguish the retired transformer from equipment still feeding lighting, refrigeration or other occupied spaces before the disconnect work begins.

Around the site

Shipping weight and footprint

Shipping weight for the 37.5 kVA equipment described here is roughly 300 to 450 pounds. Verify the actual unit's weight before selecting lifting equipment. Oil volume, tank construction and cabinet arrangement affect the load; a visual estimate is not a rigging specification.

Measure the 37.5 kVA padmount cabinet's width, depth and height, including projecting hinges or handles. Record the concrete pad dimensions separately.

Photographs should show the cabinet base and surrounding clearance so the crew can plan access without mistaking pad size for equipment footprint.

Where it sits

Rigging and load-out

Plan a small crane or a boom truck for the roughly 300 to 450 pound unit. A half-ton pickup will not do for this load-out.

Truck payload alone does not provide controlled lifting, suitable tie-down points or a safe way off the pad.

Before lifting a 37.5 kVA padmount, qualified personnel must isolate the circuit, verify absence of voltage and complete required grounding. Inspect lifting provisions and confirm the manufacturer's instructions. Never rig from a bushing, elbow, cabinet handle or radiator, if one is fitted.

On the ground

Primary and secondary voltages

A 37.5 kVA rating does not identify primary voltage. Read the nameplate rather than assuming the local feeder voltage applies.

Include tap information and whether the primary connection is phase-to-neutral; these details help distinguish units that look alike from outside the cabinet.

For a single-phase unit marked 120/240 volts secondary, rated current is approximately 156 amperes at 240 volts. That calculation does not establish service conductor size or protection requirements.

Photograph secondary terminals and connection markings without entering an energized 37.5 kVA transformer's compartment.

Local reality

Inspection and oil test

Inspect a de-energized 37.5 kVA tank for gasket seepage, corrosion near the base, damaged bushings and evidence of overheating. Photograph each defect before cleaning.

A wet patch beneath the cabinet needs investigation; it should not automatically be described as rainwater or harmless residue.

For an oil-filled 37.5 kVA unit, provide existing dielectric breakdown, moisture and PCB laboratory reports when available. Match each report to the serial number and sample date.

Qualified personnel should collect any new sample using the appropriate procedure, without opening an energized compartment.

Around the site

Valuation for this size

Assessment of a retired 37.5 kVA transformer starts with the nameplate, ownership documentation and condition photographs. A complete, sealed tank with readable records presents a different handling case from a failed unit with missing bushings, leaked oil or an unreadable serial number.

For this roughly 300 to 450 pound class, removal conditions also matter: crane access, pad clearance, disconnection status and oil containment requirements. Transformer Buyers NC buys used, surplus, failed and obsolete units across North Carolina, with each transformer reviewed against its documented condition.