Home / Specifications / Pad Mounted Transformer Dimensions and Weights
Pad Mounted Transformer Dimensions and Weights
Dimensions drive the pad, the crane and the freight, and they are the first thing a contractor needs before anything is ordered. The figures below are typical for three phase liquid-filled units built to ANSI/IEEE C57.12.34. Every manufacturer varies, so confirm against the approved drawing before the pad is poured.
Typical dimensions by rating
| Rating | W x D x H, in | Weight, lb | Impedance, % | Amps at 480Y/277 |
|---|---|---|---|---|
| 45 kVA | 48 x 46 x 52 | 1,350 | 3.5 | 54 |
| 75 kVA | 52 x 50 x 55 | 1,750 | 4.0 | 90 |
| 112.5 kVA | 55 x 52 x 57 | 2,050 | 4.2 | 135 |
| 150 kVA | 58 x 54 x 60 | 2,400 | 4.5 | 180 |
| 225 kVA | 62 x 58 x 63 | 3,000 | 5.0 | 271 |
| 300 kVA | 66 x 60 x 66 | 3,500 | 5.0 | 361 |
| 500 kVA | 72 x 66 x 72 | 4,900 | 5.5 | 601 |
| 750 kVA | 80 x 72 x 78 | 6,600 | 5.75 | 902 |
| 1000 kVA | 86 x 76 x 82 | 8,200 | 5.75 | 1,203 |
| 1500 kVA | 96 x 84 x 90 | 11,500 | 6.0 | 1,804 |
| 2000 kVA | 104 x 90 x 96 | 14,500 | 6.0 | 2,406 |
| 2500 kVA | 112 x 96 x 102 | 17,500 | 6.0 | 3,007 |
Weight and size by rating
How big is a 45 kVA pad mounted transformer, and how much does it weigh
About 48 x 46 x 52 inches wide by deep by high, and about 1,350 pounds with the fluid, for a three phase liquid filled unit. Full load current is 54 amps at 480Y/277. See the 45 kVA page for impedance, uses and lead time.
How big is a 75 kVA pad mounted transformer, and how much does it weigh
About 52 x 50 x 55 inches wide by deep by high, and about 1,750 pounds with the fluid, for a three phase liquid filled unit. Full load current is 90 amps at 480Y/277. See the 75 kVA page for impedance, uses and lead time.
How big is a 112.5 kVA pad mounted transformer, and how much does it weigh
About 55 x 52 x 57 inches wide by deep by high, and about 2,050 pounds with the fluid, for a three phase liquid filled unit. Full load current is 135 amps at 480Y/277. See the 112.5 kVA page for impedance, uses and lead time.
How big is a 150 kVA pad mounted transformer, and how much does it weigh
About 58 x 54 x 60 inches wide by deep by high, and about 2,400 pounds with the fluid, for a three phase liquid filled unit. Full load current is 180 amps at 480Y/277. See the 150 kVA page for impedance, uses and lead time.
How big is a 225 kVA pad mounted transformer, and how much does it weigh
About 62 x 58 x 63 inches wide by deep by high, and about 3,000 pounds with the fluid, for a three phase liquid filled unit. Full load current is 271 amps at 480Y/277. See the 225 kVA page for impedance, uses and lead time.
How big is a 300 kVA pad mounted transformer, and how much does it weigh
About 66 x 60 x 66 inches wide by deep by high, and about 3,500 pounds with the fluid, for a three phase liquid filled unit. Full load current is 361 amps at 480Y/277. See the 300 kVA page for impedance, uses and lead time.
How big is a 500 kVA pad mounted transformer, and how much does it weigh
About 72 x 66 x 72 inches wide by deep by high, and about 4,900 pounds with the fluid, for a three phase liquid filled unit. Full load current is 601 amps at 480Y/277. See the 500 kVA page for impedance, uses and lead time.
How big is a 750 kVA pad mounted transformer, and how much does it weigh
About 80 x 72 x 78 inches wide by deep by high, and about 6,600 pounds with the fluid, for a three phase liquid filled unit. Full load current is 902 amps at 480Y/277. See the 750 kVA page for impedance, uses and lead time.
How big is a 1000 kVA pad mounted transformer, and how much does it weigh
About 86 x 76 x 82 inches wide by deep by high, and about 8,200 pounds with the fluid, for a three phase liquid filled unit. Full load current is 1,203 amps at 480Y/277. See the 1000 kVA page for impedance, uses and lead time.
How big is a 1500 kVA pad mounted transformer, and how much does it weigh
About 96 x 84 x 90 inches wide by deep by high, and about 11,500 pounds with the fluid, for a three phase liquid filled unit. Full load current is 1,804 amps at 480Y/277. See the 1500 kVA page for impedance, uses and lead time.
How big is a 2000 kVA pad mounted transformer, and how much does it weigh
About 104 x 90 x 96 inches wide by deep by high, and about 14,500 pounds with the fluid, for a three phase liquid filled unit. Full load current is 2,406 amps at 480Y/277. See the 2000 kVA page for impedance, uses and lead time.
How big is a 2500 kVA pad mounted transformer, and how much does it weigh
About 112 x 96 x 102 inches wide by deep by high, and about 17,500 pounds with the fluid, for a three phase liquid filled unit. Full load current is 3,007 amps at 480Y/277. See the 2500 kVA page for impedance, uses and lead time.
What the numbers do not tell you
The cabinet is not the pad. The concrete pad is normally larger than the footprint on every side, and the utility usually specifies it. Height matters for crane reach and for anything overhead. Weight matters because a 300 kVA unit at three and a half thousand pounds is not something a forklift places casually.
Every one of these figures varies between manufacturers by a few inches, and a difference of a few inches is enough to make a poured pad wrong. Get the approved drawing for the unit actually being supplied before concrete is ordered.
Plan the space around it too. The clearance requirements usually take more room than the cabinet, and the nameplate on the delivered unit gives the exact weight for rigging. Dry type units of the same rating are larger and lighter, see oil filled and dry type.
Need this checked against a real quote? Send it over and we will tell you what it does and does not include. No charge, and no obligation to buy from us.