What Is the Weight and Dimensions of a 37.5KVA Pole-Mounted Transformer
2026-09-29
When specifying distribution equipment for overhead lines, engineers and procurement teams frequently ask about the physical profile of a 37.5KVA Pole-Mounted Transformer. Guangbian manufactures these units to standardized dimensions so that utilities, EPC contractors, and industrial buyers can plan pole loading, clearances, and logistics with confidence. The figures below reflect conventional single-phase and three-phase designs; actual values vary with winding material, tank construction, and accessory configuration.
Typical Weight and Dimensions at a Glance
| Parameter | Single-Phase (Copper) | Single-Phase (Aluminum) | Three-Phase (Aluminum) |
|---|---|---|---|
| Tank length | 760–860 mm | 740–840 mm | 900–1,050 mm |
| Tank width | 560–640 mm | 540–620 mm | 700–820 mm |
| Tank height | 900–1,050 mm | 880–1,020 mm | 1,000–1,200 mm |
| Total height with bushings | 1,250–1,450 mm | 1,220–1,420 mm | 1,400–1,600 mm |
| Oil weight | 95–120 kg | 85–110 kg | 130–165 kg |
| Total weight | 480–620 kg | 420–540 kg | 650–850 kg |
Key Factors That Change the Footprint
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Winding material: Copper windings raise total mass by roughly 8–15% compared with aluminum equivalents.
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Tank design: Corrugated tanks reduce oil volume and weight; conventional radiators add both.
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Voltage class: A 37.5KVA Pole-Mounted Transformer rated 34.5 kV requires longer bushings and greater phase spacing than a 13.8 kV unit.
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Accessories: Surge arresters, fuses, tap changers, and pressure relief devices add 15–40 kg and extend overall height.
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Cooling class: ONAN units remain the lightest; KNAN or forced-air variants are heavier and larger.
Why These Numbers Matter in the Field
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Pole loading calculations: A 600 kg transformer plus crossarm, hardware, and conductors determines the required pole class and guying.
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Clearance compliance: Total height with bushings governs phase-to-ground and phase-to-phase distances under NESC, IEC, and local codes.
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Transport and rigging: Units above 500 kg typically require a crane or boom truck rather than a line truck winch.
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Foundation and mounting: Bracket spacing and tank bolt patterns must match the pole-mounting configuration before delivery.
Installation and Handling Notes
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Verify the crane or digger derrick capacity against the certified unit weight on the nameplate.
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Confirm the mounting bracket bolt circle matches the pole hardware before lifting.
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Allow minimum clearances specified by the applicable utility standard, not just catalog dimensions.
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Inspect bushings, gaskets, and oil level after any lift exceeding the recommended sling angle.
Guangbian publishes certified outline drawings and weight certificates for every 37.5KVA Pole-Mounted Transformer, allowing design teams to complete structural and electrical studies without guesswork.
Frequently Asked Questions
Q: How much does a 37.5KVA pole-mounted transformer weigh?
A: A single-phase aluminum-wound unit typically weighs 420–540 kg, while a copper-wound equivalent ranges from 480–620 kg. Three-phase designs generally fall between 650–850 kg. The exact figure depends on tank style, oil volume, and installed accessories, and is always stated on the nameplate and certified drawing.
Q: What are the standard dimensions of a 37.5KVA pole-mounted transformer?
A: Most single-phase tanks measure roughly 740–860 mm long, 540–640 mm wide, and 880–1,050 mm high, with total height reaching 1,220–1,450 mm once bushings are fitted. Three-phase units are larger, commonly 900–1,050 mm long, 700–820 mm wide, and up to 1,600 mm overall height.
Q: Does the weight of a 37.5KVA pole-mounted transformer change with voltage rating?
A: Yes. Higher primary voltage classes require longer bushings, larger clearances, and sometimes additional insulation, which increases both height and mass. A 34.5 kV unit can weigh 10–20% more than a comparable 13.8 kV design.
Q: Can a 37.5KVA pole-mounted transformer be customized in size and weight?
A: Manufacturers can adjust tank geometry, winding material, and accessory packages, but any change affects pole loading and clearance calculations. Custom dimensions should always be confirmed against certified drawings before structural approval.
For certified drawings, weight certificates, or a tailored quotation on a 37.5KVA Pole-Mounted Transformer, contact Guangbian today and let our engineering team support your next overhead distribution project.
