KLLU Datasheet, PDF (1/3 Pages) Littelfuse – General Purpose Fuses

General Purpose Fuses
KLLU Class L Fuses
600 VAC  •  Time-Delay  •  601 – 4000 Amperes
KLLU series UL Listed, time-delay, Class L fus­es are quality fuses,
de­vel­oped to provide a some­what lower priced al­ter­nate to the
POWR-PRO^® 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.
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.
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 short-
circuits or over­load­ed equipment, because only the fuse im­me­di­ate­ly
on the line side of the af­fect­ed circuit opens.
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 time-
current 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
750
1000
1400
1800
3000
650
800
1200
1500
2000
3500
700
900
1350
1600
2500
4000
Example part number (series & amperage): KLLU 1000
26
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© 2005 Littelfuse • POWR-GARD^™ Products Catalog