Description
These TEFC motors are built according to NEMA standard, and designed to operate with 100% of humidity in the most corrosive environments. All the line is certified for use with frequency inverter, and can operate in both the horizontal and vertical position. The Cooling Tower was tested according to the IEEE 112, method B, and it has efficiency values certified by UL (CSA C390). They ensure high efficiency levels with high torque, even at low speeds.
| Standard | NEMA MG-1 |
|---|---|
| Frequency | 60 Hz |
| Voltage | 575 V |
| Number of poles | 12/6 |
| Degree of Protection | IP55 |
| Synchronous speed | 600/1200 rpm |
| Output rating | 3.75/15 HP |
| Mounting | F-2 |
| Flange | Without |
| Terminal box¹ | Right position |
| Enclosure | IC411 - TEFC |
Electric Motors
| Frame | 284/6T |
|---|---|
| Output | 3.75 HP (2.8 kW) |
| Number of Poles | 12/6 |
| Frequency | 60 Hz |
| Rated speed | 580 rpm |
| Slip | 3.33 % |
| Rated voltage | 575 V |
| Rated current | 5.15 A |
| L. R. Amperes | 17.0 A |
| LRC | 3.3x(Code E) |
| No load current | 3.20 A |
| Rated torque | 34.0 ft.lb |
| Locked rotor torque | 130 % |
| Breakdown torque | 180 % |
| Locked rotor time | 162s (cold) 90s (hot) |
| Moment of inertia (J) | 9.16 sq.ft.lb |
| 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-2 |
| Rotation¹ | Both (CW and CCW) |
| Noise level² | 60.0 dB(A) |
| Approx. weight³ | 485 lb |
Efficiency
| 50% | 80.0 |
|---|---|
| 75% | 82.5 |
| 100% | 84.0 |
Power factor
| 50% | 0.44 |
|---|---|
| 75% | 0.59 |
| 100% | 0.65 |
Electric Motors
| Frame | 284/6T |
|---|---|
| Output | 15 HP (11 kW) |
| Number of Poles | 12/6 |
| Frequency | 60 Hz |
| Rated speed | 1180 rpm |
| Slip | 1.67 % |
| Rated voltage | 575 V |
| Rated current | 14.4 A |
| L. R. Amperes | 112 A |
| LRC | 7.8x(Code J) |
| No load current | 5.68 A |
| Rated torque | 66.8 ft.lb |
| Locked rotor torque | 280 % |
| Breakdown torque | 300 % |
| Locked rotor time | 16s (cold) 9s (hot) |
| Moment of inertia (J) | 9.16 sq.ft.lb |
| 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-2 |
| Rotation¹ | Both (CW and CCW) |
| Noise level² | 59.0 dB(A) |
| Approx. weight³ | 485 lb |
Efficiency
| 50% | 91.0 |
|---|---|
| 75% | 90.2 |
| 100% | 90.2 |
Power factor
| 50% | 0.70 |
|---|---|
| 75% | 0.81 |
| 100% | 0.85 |
Features
| Frame Material | Cast Iron |
|---|---|
| Impregnation Method | Double impregnation polyester |
| Space Heater Voltage | 110-127/200-240 V |
| Main terminal box hole | NPT 1 1/2" |
| Terminal Block | Without |
| Shaft Locking Device | Without |
| Drain | Rubber, automatic |
| Shaft Material | SAE 1040/45 Carbon Steel |
| Painting | RAL 5009 202E (ISO 12944 - C4) |
| Grounding Lugs | Single |
| Fan Cover material | Cast Iron |
| Tropicalized Painting | Complete (200h) |
| Joints Seal | Permatex |
| Fan material | Plastic |
| Bearing cap | Yes- Bearing Cap |
| Balancing Method | 1/2 Key |
| Drip Cover | Without |
| Overload protector (phenolic) | Without overload protector |
| Connection Cables Quantity | 6 |
