KLDR015 Datasheet, PDF (1/4 Pages) Littelfuse – KLDR Series - Class CC Time-Delay Fuse For Transformers

Part Number: KLDR015.
Technology: Fuses
Series: KLDR
KLDR Series - Class CC Time-Delay Fuse For Transformers
KLDR fuses are time-delay fuses specifically designed for the
protection of control transformers, solenoids and similar inductive
components with high magnetizing currents during the first half-
cycle.
They closely match most control power transformer
characteristics, which permits the fuses to be sized in accordance
with the latest revisions of UL 508 (Industrial Control) and UL 845
(Motor Control Centers).
When the time delay of KLDR fuses is adequate to carry motor
starting current, they provide excellent protection of motor branch
circuits containing IEC or NEMA rated motor controllers or
contractors.
Compared to other UL Listed fuses, Class CC fuses are the most
current limiting, rating for rating. Because they are physically
compact, they provide this superior protection in a fraction of the
space required by other fuse classes.
For example, when 600V three-pole, 30 ampere Class R fuse
blocks are replaced by Littelfuse Class CC fuse blocks, panel-
mounting space is reduced approximately 70%. This is especially
important when a panel contains many fuses to protect multiple
circuit components.
Applications:
Three types of Class CC Fuses, specifically designed to protect
different types of components:
1. Motor protection – CCMR series; dual-element, time-
delay fuses specifically designed to protect motor circuits
up to 40 HP. Review the motor protection tables in
PF101 for more information.
2. Small transformer protection (control power transformers)
– KLDR series, time-delay fuses designed to withstand
the high magnetizing inrush of transformers.
3. General purpose protection of equipment requiring fast
overload protection – KLKR series, fast-acting fuses used
for protection of equipment containing solid-state devices
or other electronic components requiring fast response
on overloads.
Safety:
z 200,000 A.I.R. — Reliable interruption of all overcurrents
up to 200,000 amperes.
z Extremely current limiting — Reduces damage caused by
heating and magnetic effects of short-circuit currents…
stops damaging short-circuit faster than any mechanical
protective device.
Space Saving:
z Class CC fuses are the smallest 600V, 200,000 A.I.R.
fuses approved for branch circuit protection.
Economical:
z Current limiting design often permits use of readily
available, less costly equipment.