Catalogues - general-purpose-ul-fuses

Catalogue General Purpose UL Fuses

www.ferrazshawmut.com

Page

/ 70

Make a request

/ 70

See other catalogues for Ferraz Shawmut

Text version of the page

General Purpose US Fuses

American Power Fuses AMP-TRAP 2000® AJT (Class J TD)

Three phase motor manufacturer Industrial fuse Selection

380 Volt Three Phase Class J AJT Fuses

Three Phase Motor Fuse Selection

575 Volt Three Phase Class J AJT Fuses


	■	Full	Recommended Fuse Ampere Rating
Motor		Load	Motor Acceleration Times
HP		Amperes	Minimum	Typical	Heavy Load
		at 575V	2 sec.	5 sec.	Over 5 sec.
1/2		.9	1-1/4	1-1/2	1-6/10
3/4		1.3	1-6/10	2	1-1/2
1		1.7	2-1/4	2-1/2	3
1-1/2		2.4	3	3-1/2	4-1/2
2		2.7	3-2/10	4	5
3		3.9	5	6	7
5		6.1	8	9	12
7-1/2		9	12	15	17-1/2
10		11	15	17-1/2	20
15		17	20	25	30
20		22	30	35	35
25		27	35	40	50
30		32	40	50	60
40		41	50	60	70
50		52	70	80	90
60		62	80	90	110
75		77	100	125	150
100		99	125	150	175
125		125	150	200	225
150		144	175	225	250
200		192	250	300	350
250		240	300	350	400
300		289	350	450	500

Full Load

Recommended Fuse Ampere Rating

Motor

Motor Acceleration Times


HP	Amperes	Minimum	Typical	Heavy Load
	at 380V	2 sec.	5 sec.	Over 5 sec.
1/2	1.3	1-6/10	2	2-1/4
3/4	1.9	2-1/2	2-8/10	3-1/2
1	2.5	3-2/10	4	4-1/2
1-1/2	3.6	4-1/2	5-6/10	6
2	4.1	5	6	7
3	5.8	8	8	10
5	9.2	12	15	17-1/2
7-1/2	13.3	17-1/2	20	25
10	17	20	25	30
15	25	30	40	45
20	33	40	50	60
25	41	50	60	70
30	48	60	80	90
40	68	80	100	125
50	79	90	125	150
60	93	110	150	175
75	116	150	175	200
100	150	175	225	250
125	189	250	300	350
150	218	300	350	400
200	291	350	450	500
460 Volt Three Phase Class J AJT Fuses
	Full	Recommended Fuse Ampere Rating
Motor	Load	Motor Acceleration Times
HP	Amperes	Minimum	Typical	Heavy Load
	at 460V	2 sec.	5 sec.	Over 5 sec.
1/2	1.1	1-1/2	1-6/10	2
3/4	1.6	2	2-1/4	3
1	2.1	2-1/2	3-2/10	4
1-1/2	3	3-1/2	4-1/2	5-6/10
2	3.4	4	5	6
3	4.8	6	8	9
5	7.6	10	12	15
7-1/2	11	15	15	20
10	14	17-1/2	20	25
15	21	25	30	40
20	27	35	40	50
25	34	40	50	60
30	40	50	60	70
40	52	70	80	90
50	65	80	100	125
60	77	100	125	150
75	96	125	150	175
100	124	175	200	250
125	156	200	225	300
150	180	225	250	350
200	240	300	350	450
250	302	400	450	600
300	361	450	600	-

Minimum - Minimum sizing may not be heavy enough for motors with code letter G or higher

Typical - Suggested for most applications. Will coordinate with NEMA Class 20 overload relays. Suitable for motor acceleration times up to 5 seconds.

Heavy Load - ti accordance with Table 430-152. IF this

fuse is not sufficient to start the load, it may be increased to a maximum of 225% of full-load amperes (430-52 Ex;. 2b). Use this column for Design E Motors.

12/04