KLLU Series -
600 V - UL Class L Time-Delay Fuses
KLLU series UL Listed, time-delay, Class L are quality fuses in every
sense of the word. They were 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 fuses.
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
manufacturer’s 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 percent of rating
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…meets 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.
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