Pro Energy Tools

Providing Power Solutions To all Industries

POWER REQUIREMENT CALCULATOR

Phase

Volts

Amperes

Power Factor

0.8

1.0

Power - kW

CONVERTING KW TO KVA

KVA

CONVERTING KVA TO KW

KVA

CONVERTING KW TO HP

What size genset is needed to start a 3 phase electric motor Direct on Line (DOL) start?

HP of Motor

Generator - kVA Required

CALCULATING AMPERES (when you know kVA)

Phase 1 and 3

Generator kVA

Volts Required

Ampere - I

KVA	KW	208V	220V	240V	380V	400V	440V	450V	480V	600V	2400V	3300V	4160V
6.3	5	17.5	16.5	15.2	9.6	9.1	8.3	8.1	7.6	6.1	–	–	–
9.4	7.5	26.1	24.7	22.6	14.3	13.6	12.3	12	11.3	9.1	–	–	–
12.5	10	34.7	33	30.1	19.2	18.2	16.6	16.2	15.1	12	–	–	–
18.7	15	52	49.5	45	28.8	27.3	24.9	24.4	22.5	18	–	–	–
25	20	69.5	66	60.2	38.4	36.4	33.2	32.4	30.1	24	6	4.4	3.5
31.3	25	87	82.5	75.5	48	45.5	41.5	40.5	37.8	30	7.5	5.5	4.4
37.5	30	104	99	90.3	57.6	54.6	49.8	48.7	45.2	36	9.1	6.6	5.2
50	40	139	132	120	77	73	66.5	65	60	48	12.1	8.8	7
62.5	50	173	165	152	96	91	83	81	76	61	15.1	10.9	8.7
75	60	208	198	181	115	109	99.5	97.5	91	72	18.1	13.1	10.5
93.8	75	261	247	226	143	136	123	120	113	90	22.6	16.4	13
100	80	278	264	240	154	146	133	130	120	96	24.1	17.6	13.9
125	100	347	330	301	192	182	166	162	150	120	30	21.8	17.5
156	125	433	413	375	240	228	208	204	188	150	38	27.3	22
187	150	520	495	450	288	273	249	244	225	180	45	33	26
219	175	608	577	527	335	318	289	283	264	211	53	38	31
250	200	694	660	601	384	364	332	324	301	241	60	44	35
312	250	866	825	751	480	455	415	405	376	300	75	55	43
375	300	1040	990	903	576	546	498	487	451	361	90	66	52
438	350	1120	1155	1053	672	637	581	568	527	422	105	77	61
500	400	1390	1320	1203	770	730	665	650	602	481	120	88	69
625	500	1735	1650	1504	960	910	830	810	752	602	150	109	87
750	600	2080	1980	1803	1150	1090	996	975	902	721	180	131	104
875	700	2430	2310	2104	1344	1274	1162	1136	1052	842	210	153	121
1000	800	2780	2640	2405	1540	1460	1330	1300	1203	962	241	176	139
1125	900	3120	2970	2709	1730	1640	1495	1460	1354	1082	271	197	156
1250	1000	3470	3300	3009	1920	1820	1660	1620	1504	1202	301	218	175
1563	1250	4350	4130	3765	2400	2280	2080	2040	1885	1503	376	273	218
1875	1500	5205	4950	4520	2880	2730	2490	2440	2260	1805	452	327	261
2188	1750	–	–	5280	3350	3180	2890	2830	2640	2106	2528	380	304
2500	2000	–	–	6020	3840	3640	3320	3240	3015	2405	602	436	348
2812	2250	–	–	6780	4320	4095	3735	3645	3400	2710	678	491	392
3130	2500	–	–	7520	4800	4560	4160	4080	3765	3005	752	546	435
3750	3000	–	–	9040	5760	5460	4980	4880	4525	3610	904	645	522
4375	3500	–	–	10550	6700	6360	5780	5660	5285	4220	1055	760	610
5000	4000	–	–	12040	7680	7280	6640	6480	6035	4810	1204	872	695

Generator Size (kW)	1/4 Load (gal/hr)	1/2 Load (gal/hr)	3/4 Load (gal/hr)	Full Load (gal/hr)
20	0.6	0.9	1.3	1.6
30	1.3	1.8	2.4	2.9
40	1.6	2.3	3.2	4.0
60	1.8	2.9	3.8	4.8
75	2.4	3.4	4.6	6.1
100	2.6	4.1	5.8	7.4
125	3.1	5	7.1	9.1
135	3.3	5.4	7.6	9.8
150	3.6	5.9	8.4	10.9
175	4.1	6.8	9.7	12.7
200	4.7	7.7	11	14.4
230	5.3	8.8	12.5	16.6
250	5.7	9.5	13.6	18.0
300	6.8	11.3	16.1	21.5
350	7.9	13.1	18.7	25.1
400	8.9	14.9	21.3	28.6
500	11.0	18.5	26.4	35.7
600	13.2	22.0	31.5	42.8
750	16.3	27.4	39.3	53.4
1000	21.6	36.4	52.1	71.1
1250	26.9	45.3	65.0	88.8
1500	32.2	54.3	77.8	106.5
1750	37.5	63.2	90.7	124.2
2000	42.8	72.2	103.5	141.9
2250	48.1	81.1	116.4	159.6

Generator Size (kW)	1/4 Load (ft3/hr)	1/2 Load (ft3/hr)	3/4 Load (ft3/hr)	Full Load (ft3/hr)
20	157	188	247	289
30	202	260	348	416
40	246	333	449	543
60	334	479	652	798
75	400	588	803	990
100	510	771	1056	1308
125	621	953	1308	1627
135	665	1026	1409	1754
150	731	1135	1561	1946
175	841	1317	1813	2264
200	952	1500	2066	2583
230	1084	1718	2369	2965
250	1172	1864	2571	3220
300	1393	2229	3076	3857
350	1614	2593	3581	4495
400	1834	2958	4086	5132
500	2276	3687	5096	6407
600	2717	4416	6107	7681
750	3379	5509	7622	9593
1000	4482	7332	10147	12780

Depth cm	Vol L	Depth cm	Vol L	Depth cm	Vol L	Depth cm	Vol L
1	5	33	951	65	2373	98	3814
2	15	34	992	66	2419	99	3853
3	28	35	1033	67	2465	100	3891
4	43	36	1074	68	2511	101	3928
5	60	37	1116	70	2603	102	3965
6	79	38	1158	71	2649	103	4002
7	100	39	1201	72	2695	104	4038
8	121	40	1243	73	2740	105	4073
9	144	41	1286	74	2786	106	4108
10	169	42	1330	75	2831	107	4142
11	194	43	1373	76	2877	108	4175
12	221	44	1417	77	2922	109	4207
13	248	45	1461	78	2967	110	4239
14	277	46	1505	79	3012	111	4270
15	306	47	1550	80	3057	112	4301
16	336	48	1595	81	3101	113	4330
17	367	49	1639	82	3145	114	4358
18	399	50	1685	83	3189	115	4386
19	432	51	1730	84	3233	116	4412
20	465	52	1775	85	3277	117	4438
21	499	53	1821	86	3320	118	4462
22	534	54	1866	87	3363	119	4485
23	569	55	1912	88	3406	120	4507
24	605	56	1958	89	3448	121	4527
25	641	57	2004	90	3491	122	4546
26	678	58	2050	91	3532	123	4563
27	716	59	2096	92	3574	124	4578
28	754	60	2142	93	3615	125	4591
29	792	61	2188	94	3656	126	4601
30	831	62	2234	95	3696	127	4607
31	871	63	2280	96	3736
32	911	64	2326	97	3775

Depth cm	Vol L	Depth cm	Vol L	Depth cm	Vol L	Depth cm	Vol L
1	7	58	3025	115	7621	172	12164
2	21	59	3098	116	7705	173	12235
3	39	60	3172	117	7788	174	12306
4	59	61	3247	118	7872	175	12376
5	83	62	3321	119	7956	176	12446
6	109	63	3396	120	8040	177	12515
7	137	64	3472	121	8124	178	12584
8	167	65	3548	122	8207	179	12652
9	199	66	3624	123	8291	180	12719
10	233	67	3701	124	8374	181	12786
11	268	68	3777	125	8458	182	12853
12	305	69	3855	126	8541	183	12919
13	343	70	3932	127	8625	184	12984
14	383	71	4010	128	8708	185	13049
15	424	72	4088	129	8791	186	13113
16	467	73	4166	130	8874	186	13176
17	510	74	4245	131	8957	188	13239
18	555	75	4324	132	9039	189	13301
19	601	76	4403	133	9122	190	13363
20	649	77	4483	134	9204	191	13423
21	697	78	4562	135	9287	192	13483
22	746	79	4642	136	9369	193	13543
23	796	80	4723	137	9451	194	13601
24	848	81	4803	138	9533	195	13659
25	900	82	4884	139	9615	196	13716
26	953	83	4965	140	9696	197	13772
27	1007	84	5046	141	9777	198	13827
28	1062	85	5127	142	9859	199	13882
29	1118	86	5208	143	9939	200	13935
30	1174	87	5290	144	10020	201	13988
31	1232	88	5372	145	10101	202	14039
32	1290	89	5454	146	10181	203	14090
33	1349	90	5536	147	10261	204	14140
34	1409	91	5618	148	10341	205	14189
35	1469	92	5700	149	10420	206	14236
36	1530	93	5783	150	10500	207	14283
37	1592	94	5866	151	10579	208	14328
38	1655	95	5949	152	10658	209	14372
39	1718	96	6031	153	10736	210	14415
40	1782	97	6114	154	10814	211	14457
41	1846	98	6198	155	10892	212	14498
42	1911	99	6281	156	10970	213	213
43	1977	100	6364	157	11047	214	14574
44	2043	101	6448	158	11124	215	14610
45	2110	102	6531	159	11201	216	14645
46	2177	103	6615	160	11277	217	14677
47	2245	104	6698	161	11353	218	14708
48	2313	105	6782	162	11429	219	14737
49	2382	106	6866	163	11504	220	14764
50	2452	107	6950	164	11579	221	14789
51	2522	108	7033	165	11654	222	14810
52	2592	109	7117	166	11728	223	14829
53	2663	110	7201	167	11802	224	14845
54	2735	111	7285	168	11875	225	14855
55	2806	112	7369	169	11948
56	2879	113	7453	170	12020
57	2952	114	7537	171	12092

Pro Energy Tools

Providing Power Solutions To all Industries

POWER REQUIREMENT CALCULATOR

CONVERTING KW TO KVA

CONVERTING KVA TO KW

CONVERTING KW TO HP

What size genset is needed to start a 3 phase electric motor Direct on Line (DOL) start?

CALCULATING AMPERES (when you know kVA)

Your Power. Our Priority

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