Induction Motor KW HP Ampere rating

Induction Motor KW HP Ampere rating

Induction Motor KW HP Ampere rating

Rating	HP	220V,AC	240V,AC	380V,AC	415V,AC	550V,AC
0.37 kW	1/2	2.5	2.3	1.4	1.3	0.8
0.56 kW	3/4	3.1	2.8	1.8	1.6	1.1
0.75 kW	1	3.5	3.2	2	1.8	1.4
1.1 kW	1.5	5	4.5	2.8	2.6	1.9
1.5 kW	2	6.4	5.8	3.7	3.4	2.6
2.2 kW	3	9.5	8.7	5.5	5	3.5
3.0 kW	4	12	11	7	6.5	4.7
3.7 kW	5	15	13	8	8	6
4.0 kW	5.5	16	14	9	8	6
5.5 kW	7.5	20	19	12	11	8
7.5 kW	10	27	25	16	15	11
9.3 kW	12.5	34	32	20	18	14
10 kW	13.5	37	34	22	20	15
11 kW	15	41	37	23	22	16
15 kW	20	64	50	31	28	21
18 kW	25	67	62	39	36	26
22 kW	30	74	70	43	39	30
30 kW	40	99	91	57	52	41
37 kW	50	130	119	75	69	50
45 kW	60	147	136	86	79	59
55 kW	75	183	166	105	96	72
75 kW	100	239	219	138	125	95
90 kW	125	301	269	170	156	117
110 kW	150	350	325	205	189	142
130 kW	175	410	389	245	224	169
150 kW	200	505	440	278	255	192

for more study, refer a practical guide to cable installation and tool box talk

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Utilization category of contractors

Utilization category of contractors Utilization Category	Type of Application
AC-1	Non-inductive i.e.: heaters, furnace
AC-2	Slip-ring motors: switching off
AC-3	Squirrel-cage motors: starting, switches off motors for crane service
AC-4	Squirrel-cage motors: starting, plugging, inching
AC-5a	Switching of discharge lamps
AC-5b	Switching of incandescent lamps
AC-6a	Switching of transformers
AC-6b	Switching of capacitor banks
AC-7a	Slightly inductive loads in household appliances: examples: mixers, blenders
AC-7b	Motor-loads for household appliances: examples: fans, central vacuum
AC-8a	Hermetic refrigerant compressor motor control with manual resetting overloads
AC-8b	Hermetic refrigerant compressor motor control with automatic resetting overloads
AC-15	Control of A.C. electromagnetic loads
DC-1	Non Inductive or slightly inductive loads, resistance furnaces, heaters
DC-3	Shunt-motors, starting, plugging , inching , dynamic braking of motors
DC-5	Series-motors, starting, plugging, inching, dynamic braking of motors
DC-6	Switching of incandescent lamps

Fuse, MCB, MCCB selection for motor, DOL starting

Fuse, MCB, MCCB for motor (380-415V, AC), DOL starting

Fuse, MCB, MCCB for motor, DOL starting

Motor KW	line current(A)	MCB	FUSE	MCCB
1.1	2.5-4	16	10	6
2.2	4.5-5.5	16	20	6
3.7	7.5-10	25	25	16
5.5	10-12	32	32	16
7.5	13-16	40	40	25
11	19-22	50	50	32
15	25-31	63	63	50
18.5	30-38		80	50
22	38-46		100	80
30	51-62		125	80
37	62-73		125	100
45	74-88		160	125
55	92-102		200	150
75	123-140		250	200
90	150-165		250	250

FUSE , MCB and MCCB rating for star-delta is generally 70% of DOL selection.