Catalog Number: SF415. Description: AC INVERTER,1.5HP/SCF/IP20/400-480V/3PH. Output Amps 480V: 3.0. Output Amps 400V: 3.4. Ship Weight: 3 lbs.

Look at the table the 1 hp motor takes will be 1.3 A at 440 Volts three-phase at the same time while using single-phase it takes only 3.8 Amps. Also 5 HP three-phase motor takes 6.4 Amps.

Thus, a 10-horsepower (hp) motor has an acceptable load range of Figure 2 Motor Power Factor (as a Function of % Full-Load Amperage).

Enclosure: Drip Proof, Force Ventilated Insulation Class: F. There is no running warranty. HP: 400 Field Volts: 300/150. Armature Volts: 500 Service Factor: 

IEEE 841 Motor: 400 HP, 1,785 Nameplate RPM, 460V AC, 447/9T Frame, 445.0 Full Load Amps, Ball ; Mfr. Model # 40018ST3QIE449T-W22 ; UNSPSC # 26101612 ; Catalog 

Breaker size must be rated for a minimum of 125% of the full-load current of the motor it is protecting, rounded up to the next standard breaker size. For example, the full-load current of a 5 HP motor at 460V is 7.6 Amps. The breaker must be sized for 7.6 * 1.25 = 10 Amps. Therefore, it is good practice to size the breaker at 15 Amps.

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Motor Current Rating Chart for Full Load Amps. The information in this chart was derived from Table 50.1 of UL standard. 508A. The voltages listed are rated 

HP = Amps x Volts x 1.73 x %Eff x pf/746. Transposed for Amperage, Amps = HP x 746/Volts x 1.73 x %Eff x pf. Use power factor = .9. Eff = 746 x Output HP/Input watts use 1.5. For estimating a 400

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The phase-to-phase voltage for a 3-phase supply, or the phase-to-neutral voltage for a single phase supply. Phase. Whether its a 3-phase or single phase voltage supply. Rating (P). The power rating of the motor in kW or hp. Power factor (cosΦ). The rated power factor of the motor. Typically around 0.86. Efficiency (η). The efficiency of the motor.