Description
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Drawings
Electric Motors
| Frame | 284TC |
|---|---|
| Output | 25 HP (18.5 kW) |
| Number of Poles | 4 |
| Frequency | 60 Hz |
| Rated speed | 1770 rpm |
| Slip | 1.67 % |
| Rated voltage | 230/460 V |
| Rated current | 59.8/29.9 A |
| L. R. Amperes | 490/245 A |
| LRC | 8.2x(Code J) |
| No load current | 25.0/12.5 A |
| Rated torque | 74.2 ft.lb |
| Locked rotor torque | 320 % |
| Breakdown torque | 320 % |
| Locked rotor time | 36s (cold) 20s (hot) |
| Moment of inertia (J) | 4.54 sq.ft.lb |
|---|---|
| Design | B |
| Insulation Class | F |
| Service factor | 1.15 |
| Temperature rise | 80 K |
| Duty Cycle | Cont.(S1) |
| Starting Method | Direct On Line |
| Ambient temperature | -20°C to +40°C |
| Altitude | 1000 m.a.s.l. |
| Degree of Protection | IP55 |
| Enclosure | IC411 – TEFC |
| Mounting | F-1 |
| Rotation¹ | Both (CW and CCW) |
| Noise level² | 68.0 dB(A) |
| Approx. weight³ | 483 lb |
Efficiency
| 50% | 75% | 100% |
|---|---|---|
| 92.4 | 93.6 | 93.6 |
Power factor
| 50% | 75% | 100% |
|---|---|---|
| 0.67 | 0.78 | 0.83 |
Features
| Frame Material | Cast Iron |
|---|---|
| Impregnation Method | Dip and Bake Polyester |
| Regreasing System | At Drive end and Non-drive end |
| Main terminal box hole | NPT 1 1/2″ |
| Terminal Block | Without |
| Shaft Locking Device | Without |
| Drain | Sinterized, Exd |
| Shaft Material | SAE 1040/45 Carbon Steel |
| Painting | RAL 5009 202P (ISO 12944 – C4) |
| Grounding Lugs | Single |
| Fan Cover material | Cast Iron |
| Tropicalized Painting | Without |
| Fan material | Plastic |
| Bearing cap | Yes- Bearing Cap |
| Bolt Material | Carbon Steel |
| Winding thermal protection | Thermostat – 2 wires 1 per phase 155°C |
| Balancing Method | 1/2 Key |
| Drip Cover | Without |
| Overload protector (phenolic) | Without overload protector |
| Connection Cables Quantity | 12 |

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