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What Generator size is needed for 10 hp 480 volt 3 phase motor?
Wiki User
∙ 14y ago
Watts and horsepower are directly related as they are both measurements of power. 1hp = 745.6998 watts. So 3kW = 3000W / 745.6998 W/hp = 4.023hp You need a minimum of 4hp, which will give you a max of 2982W before any losses in your generator. You should probably go with a 4.5 or 5 horse motor.
Wiki User
∙ 16y ago
Wiki User
∙ 13y agoThe code book rating of a three phase 230 volt motor is 42 amps. Motor conductors have to be rated at 125% of the full load amps. 42 x 125% = 52.5 amps. A #6 copper wire with an insulation factor of 75 or 90 degrees C is rated at 65 amps. The breaker for a motor load should be 250 % of the full load amperage. 42 x 250% = 105 amps. The next biggest size breaker up from 100 amps is 125 amps which is too big, so a 100 amp breaker will work and still be within the electrical code standards.
2 gaug 100 amp braker
Wiki User
∙ 11y agoThe accurate answer depends on the load on the motor (duty cycle) and efficiency of motor. 15HP motor will not actually give you 15HP worth of work 100% of the time.
If you assume that for sake of simplicity, then:
1 HP = 0.746 kW
Therefore, 15HP = 11.19 kW
If you ran it for an hour straight, it would need 11.19 kWh.
So at the very least you will need a generator that can give you about 12kW. Of course there are transmission losses depending on distance between the two units and cable types used. So, 15kW or more may be a better approximation.
Wiki User
∙ 14y agoA 10 hp 480 volt 3 phase motor's amperage is 14 amps. To overcome the starting current a factor of 250 % is added. This brings the current up to 35 amps. Watts = Amps x Volts. 480 x 35 = 16800 or 16.8 kW. A 15 kW generator will do the job. Away from the question, the wire size for motors is 125% of the full load amps and breakers size is 250%, fuse size 300% of the full load amps.
Wiki User
∙ 15y agoIt would depend on more specifics of the generator design such as how the coils are wound.
Wiki User
∙ 10y agowhat size generator needed for a 25 h.p. ,10 h.p., 5 h.p.,conveyor sysytem
Wiki User
∙ 8y agoThe generator would be a 230 v 3-phase generator with a rating of 18 HP or 13.5 kW. If the motor has a power factor of 0.8 the generator would need to be 17 kVA.
Wiki User
∙ 9y agoAt least 23kW
Wiki User
∙ 10y agoA 5 HP motor or engine should do the job.
Wiki User
∙ 11y ago21 kVA
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