4 Hp Electric Motor Amp Draw

Determine the amps in single phase 1 hp 120 volt motor having an efficiency rating of 88 operating at a power factor 0 9.

4 hp electric motor amp draw.

115 volts motor single phase. Always check nameplate information before designing protective devices wiring and switch gear. With low power factor it pulls lot of amps producing little hp output. To check the capacitor set the volt ohm meter to rx100 scale and touch its probes to the capacitor terminals.

Motor overloaded or jammed. 460 volts motor 3 phase. Multiply hp horsepower by 746. Amps hp 746 v η pf thus the current in amps is equal to horsepower times 746 divided by the voltage times the efficiency η times the power factor.

Multiply the ac voltage by the motor efficiency the power factor and the square root of 3. This motor full load amperage fla calculator allows you to calculate the full load current of the ac electric motor. Current 1 746 120 0 88 0 9 7 84 amps two phase 4 wire ac calculations. Select the number of phases from the drop down list.

1 0 hp motor amps fla td fuses 1 2 hp motor amps fla td fuses 115v 1ph 13 0 20a 8 2 15a 230v 1ph 6 5 12a 4 1 8a 230v 3ph 2 8 5a 2 4 4a 460v 3ph 1 4 4a 1 2 3a 575v 3ph 1 1 3a 1 0 2a voltage 1 4 hp motor amps fla td fuses 115v 1ph 4 2 5a strongarm hvr303 electric vehicle restraint air powered units. Inspect to see that the load is free. For example let s find the current draw in amps of a 1 horsepower motor that runs at 120 volts with a 90 efficiency. Hp voltage typical motor f l a.

Capacitor on single phase motor may have failed. Copper conductor 75 c rating 30 c ambient wire size awg no. How to convert hp to amp ac 3 phases in only 3 step. Dual element time delay ul class rk5 fuse used with properly sized o l relay circuit breaker instantaneous trip circuit breaker continuous amp rating single phase units 115v 8 4 14 15a 15a 208v 230v 4 4 4 2 14 8a 7a 7a 115v 11.

Example if you have 100 hp multiply by 746 and you get 74600. Here are the typical full load amps fla for 220vac and 120vac 1 phase 60hz electric motors for 230vac 1 phase 60hz electric motors divide the following values by 2. 230 volts motor single phase. Verify the amp draw of motor versus the nameplate rating.

1 hp 745 7 w note that an electric motor is an inductive load. Enter the motor rated voltage in volts v enter the motor power rating and select the appropriate unit hp or kw enter the power factor and efficiency of the.