Vaughn Electric - - Since 1949

Consolidated Crane Services

Formulas

To find	Direct Current	Single Phase	Three phase
Horsepower	E x 1 x EFF 746	E x 1 x EFF x PF 746	1.732 x E x 1 x EFF x PF 746
Current	746 x hp E x EFF	746 x hp E x EFF x PF	746 x hp 1.732 x E x EFF x PF
Efficiency	746 x hp E x 1	746 x hp E x 1 x PF	746 x hp 1.732 x E x 1 x PF
Power Factor		Input watts E x 1	Input watts 1.732 x E x 1

E = Volts

EFF = Efficiency

hp = Horsepower

I = Amperes

PF = Power Factor (Decimal)

To find	Direct current	Single phase	Three Phase
Amperes	Watts Volts	Watts Volts x Power Factor	Watts 1.732 Volts x Power Factor
Volt-Amperes	__________	Volts x Amperes	1.732 x Volts x Amperes
Watts	Volts x Amperes	Volts x Amperes x Power Factor	1.732 x Volts x Amperes x Power Factor

FULL-LOAD CURRENT = KVA x 1000/Circuit Voltage

KVA	120	240	480	2400	4160	4800	7200	7620	12000	14400
3	25	12.5	6.3	1.25	0.72	0.63	0.42	0.39	0.25	0.21
5	41.7	20.8	10.4	2.08	1.2	1.04	0.69	0.66	0.42	0.35
10	83.3	41.7	20.4	4.17	2.4	2.08	1.39	1.31	0.83	0.69
15	125	62.5	31.3	6.25	3.61	3.13	2.08	1.97	1.25	1.04
25	208	104	52.1	10.4	6.01	5.21	3.47	3.28	2.08	1.74
37.5	313	156	78.1	15.6	9.01	7.81	5.21	4.92	3.13	2.6
50	417	208	104	20.8	12	10.4	6.94	6.56	4.17	3.47
75	625	313	156	31.3	18	15.6	10.4	9.84	6.25	5.21
100	833	417	208	41.7	24	20.8	13.9	13.1	8.33	6.94
167	1392	696	348	69.6	40.1	34.8	23.2	21.9	13.9	11.6
250	2083	1042	521	104	60.1	52.1	34.7	32.8	20.8	17.4
333	2775	1388	694	139	80	69.4	46.3	43.7	27.7	23.1
500	4167	2083	1042	208	120	104	69.4	65.6	41.7	34.7

313 E Florida Ave, Union City, TN 38261. 731.885.3701
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