Description
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Drawings
Electric Motors
Frame | 256T |
---|---|
Output | 20 HP (15 kW) |
Number of Poles | 2 |
Frequency | 60 Hz |
Rated speed | 3530 rpm |
Slip | 1.94 % |
Rated voltage | 230/460 V |
Rated current | 46.4/23.2 A |
L. R. Amperes | 288/144 A |
LRC | 6.2x(Code G) |
No load current | 13.4/6.70 A |
Rated torque | 29.8 ft.lb |
Locked rotor torque | 200 % |
Breakdown torque | 250 % |
Locked rotor time | 46s (cold) 26s (hot) |
Moment of inertia (J) | 1.45 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 | 75.0 dB(A) |
Approx. weight³ | 364 lb |
Efficiency
50% | 75% | 100% |
---|---|---|
90.2 | 91.0 | 91.0 |
Power factor
50% | 75% | 100% |
---|---|---|
0.79 | 0.86 | 0.89 |
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 |