Marathon
Marathon GT1028A - 25 HP, TEFC, Frame 284T
Model: GT1028A

Marathon GT1028A motor — 25 HP, 3-phase, 230/460 V, 1800 RPM, 284T frame, TEFC, 93.6% efficiency, 1.15 SF.
Technical Specifications
| Horsepower (HP) | 25 |
| Frame Size | 284T |
| Enclosure | TEFC |
| Full Load Speed (RPM) | 1800 |
| Voltage | 230/460 |
| Phase | 3 |
| Full Load Amps (A) | 65.0-60.0/30.0 |
| Weight (lbs) | 399 |
| IP Rating | IP55 |
| Category | General Purpose |
| Electrical Type | AC Induction |
| Rotation | CW/CCW |
| Frequency | 60 |
| Efficiency (%) | 93.6 |
| Service Factor | 1.15 |
| Duty Type | General Purpose |
| Shaft Diameter | 1.875 |
| Shaft Diameter Source | NEMA MG-1 frame table |
| Mounting Type | Foot Mounted |
| Mounting Type Source | Marathon 2026 Catalog p.41 |
| Ip Rating Source | Marathon catalog IP55 column flag (Y) |
Manufacturer

Marathon
A Regal Rexnord brand manufacturing industrial-grade electric motors. Known for Blue Chip XRI, Black Max, and severe duty product lines.
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