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General Purpose Fuses
KLLU Class L Fuses
600 VAC * Time-Delay * 601 - 4000 Amperes
Applications
Service switches Switchboard mains and feeders Bolted pressure contact switches Motor control center mains Large motor branch circuits UL Listed series rated protection for molded case circuit breaker panelboards and loadcenters. See panelboard manufacturers' literature for recommended fuse rating.
General Purpose Fuses
Safety
* 200,000 A.I.R. -- Provides reliable interruption of all overcurrents up to 200,000 amperes. * When used for motor branch circuit protection, KLLU fuses may be sized close to the motor full load current, providing excellent protection to branch circuit conductors, motor control equipment and motors.
Longer Equipment Life
* Current-Limiting -- Reduces short-circuit damage to systems and equipment. * Reduced downtime. * Ten second minimum time-delay at 500% current eliminates needless downtime caused by heavy starting currents of large motors and other inductive loads. * Selective coordination -- KLLU fuses coordinate well with other Class L fuses and with all current-limiting Littelfuse fuses rated 600 amps or less. This means less time spent trying to locate shortcircuits or overloaded equipment, because only the fuse immediately on the line side of the affected circuit opens.
KLLU series UL Listed, time-delay, Class L fuses are quality fuses, developed to provide a somewhat lower priced alternate to the POWR-PRO(R) KLPC series fuses. KLLU series fuses meet or exceed all UL requirements for Class L fuses. For superior protection and performance, specification-grade POWR-PRO KLPC series fuses are the recommended fuse. Complete information on KLPC fuses may be found in the POWR-PRO Fuse section of this catalog.
Easy To Use
* 200,000 A.I.R. rating minimizes need for short-circuit calculations, while meeting present and future system requirements. * KLLU fuse time-current characteristics closely match typical timecurrent curves of circuit breakers. Although fuse/circuit breaker systems can seldom be 100% coordinated, KLLU series fuses permit use of a wider range of breaker setting than fast acting Class L fuses. Excellent protection for a single breaker or a group of breakers.
Specifications
Voltage Ratings: Interrupting Ratings: Ampere Range: Approvals: AC: 600 Volts DC: Contact factory 200,000 amperes rms symmetrical 601 - 4000 amperes Standard 248-10, Class L UL Listed (File No: E81895) CSA Certified (File No: LR29862)
Ampere Ratings
601 650 700 750 800 900 1000 1200 1350 1400 1500 1600 1800 2000 2500 3000 3500 4000
Example part number (series & amperage): KLLU 1000
26
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(c) 2005 Littelfuse * POWR-GARDTM Products Catalog
General Purpose Fuses
KLLU Class L Fuses
600 VAC * Time-Delay * 601 - 4000 Amperes
J
J
J H
General Purpose Fuses
C BA
F
CB A
DEF
CBA
DEF
M
N M
N M
G
FIG.1
J H
FIG.2
FIG. 3
CBA
DEF K G L
N M
FIG. 4
Amperes 601 - 800 801 - 1200 1201 - 1600 1601 - 2000 2001 - 2500 2501 - 3000 3001 - 4000
Fig. No. 1 2 2 2 3 3
Dimensions In Inches (mm in parentheses) A 3 3 4 (95.3) 3 4 (95.3)
3
B 53 4 (146.1) 5 4 (146.1)
3
C 63 4 (171.5) 6 4 (171.5)
3
D -- 9 4 (235.0)
1
E -- 9 2 (241.3)
1
F 8 5 8 (219.1) 10 4 (273.1)
3
G -- -- -- -- 15 8 (41.3) 15 8 (41.3)
H -- -- -- -- 13 4 (44.5) 13 4 (44.5)
J 2 (50.8) 2 (50.8) 2 3 8 (60.3) 23 4 (69.9) 312 (88.9) 4 (101.6)
K 2 12 (63.5) 2 2 (63.5)
1
L
3
M
5
N --
5 8 x 11 8 (15.9) x (28.6) 5 8 x 11 8 (15.9) x (28.6) 5 8 x 11 8 (15.9) x (28.6) 5 8 x 11 8 (15.9) x (28.6) 5 8 x 11 8 (15.9) x (28.6) 5 8 x 13 8 (15.9) x (34.9)
(9.5)
3
8 8
(15.9) x (28.6)
5 8 x 3 4 (15.9) x (19.1) 5 8 x 3 4 (15.9) x (19.1) 5 8 x 3 4 (15.9) x (19.1) 5 8 x 3 4 (15.9) x (19.1) 5 8 x 3 4 (15.9) x (19.1) 5 8 x 13 8 (15.9) x (34.9)
8 x 11 8
(9.5)
7
33 4 (95.3) 33 4 (95.3) 4 (101.6) 4 (101.6) (101.6)
53 4 (146.1) 53 4 (146.1) 53 4 (146.1) 53 4 (146.1) (146.1)
63 4 (171.5) 63 4 (171.5) 6 3 4 (171.5) 6 3 4 (171.5) (171.5)
914 (235.0) 914 (235.0) 914 (235.0) 914 (235.0) (235.0)
9 12 (241.3) 9 12 (241.3) 9 12 (241.3) 9 12 (241.3) (241.3)
103 4 (273.1) 103 4 (273.1) 103 4 (273.1) 103 4 (273.1)
3 (76.2) 312 (88.9) 5 (127.0) 5 (127.0)
(11.1)
1
16 2
(12.7)
3
(19.1)
3
4
(19.1)
3 4 (19.1)
4
4
4
53 4
63 4
914
912
103 4 (273.1)
13 4 (44.5)
3 14 (82.6)
43 4 (120.7)
53 4 (146.1)
(c) 2005 Littelfuse * POWR-GARDTM Products Catalog
www.littelfuse.com
27
General Purpose Fuses
KLLU Class L Fuses
600 VAC * Time-Delay * 601 - 4000 Amperes Current-Limiting Effects of KLLU (600V) fuses
Short-Circuit Current* 5,000 General Purpose Fuses 10,000 15,000 20,000 25,000 30,000 35,000 40,000 50,000 60,000 80,000 100,000 150,000 200,000 Apparent RMS Symmetrical Current for Various Fuse Ratings 800A 5,000 10,000 11,900 13,000 14,000 14,500 15,000 16,000 17,000 18,000 19,000 21,000 24,000 26,000 1200A 5,000 10,000 15,000 18,500 20,000 21,000 22,000 23,000 24,000 26,000 28,000 30,000 35,000 38,000 1600A 5,000 10,000 15,000 20,000 25,000 26,500 28,500 30,000 32,000 34,000 36,000 38,000 44,000 48,000 2000A 5,000 10,000 15,000 20,000 25,000 30,000 34,000 35,000 38,000 42,000 44,000 46,000 50,000 53,000 3000A 5,000 10,000 15,000 20,000 25,000 30,000 35,000 37,000 39,000 43,000 46,000 48,000 51,000 60,000 4000A 5,000 10,000 15,000 20,000 25,000 30,000 35,000 40,000 44,000 50,000 54,500 57,500 68,000 74,000
* Prospective RMS Symmetrical Amperes Short-Circuit Current Note: Data Derived from Peak Let-Thru Curves
601A 800A 1200A 1600A 2000A 3000A 3500A 4000A
1000 800 600 400 300 200 100 80 60 40 30 20 10 8 6 4 3 2 1 .8 .6 .4 .3 .2 .1 .08 .06 .04 .03 .02 .01
10000000
1000000 PEAK LET-THRU IN AMPERES
TIME IN SECONDS
100000
4000A 3000A 2000A 1600A 1200A 800A
10000
60000 80000 100000
200000
300000 400000
600000 800000 1000000
CURRENT IN AMPERES
AVAILABLE FAULT CURRENT SYMMETRICAL R.M.S. AMPERES
565001
28
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(c) 2005 Littelfuse * POWR-GARDTM Products Catalog
100000
200000
6000 8000 10000
20000
30000 40000
10000
600 800 1000
2000
3000 4000
1000
50
80 100
200
300 400
100
1000

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