LITTELFUSE LDC900, LDC800, LDC700, LDC650, LDC601 Datasheet
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22
LDC Series POWR-PRO®Class L Fuses
600 V AC/DC■150 – 2000 Amperes
SPECIFICATIONS
Voltage Ratings: AC: 600 V olts
DC: 600 Volts
Interrupting Ratings:AC: 200,000 amperes rms symmetrical
DC: 50,000 amperes
(16 millisecond time-constant)
Ampere Range:150 – 2000 amperes
Approvals: Standard 248-10, Class L
UL Listed 601 – 2000 amps (File No: E81895)
UL Recognized 150 – 600 amps
(File No: E71611)
CSA Certified 150 – 2000 amps
(File No: LR29862)
AMPERE RATINGS
150 400 650 900 1300 1600
200 450 700 1000 1350 1800
250 500 750 1100 1400 1900
300 600 800 1200 1500 2000
350 601
Example part number (series & amperage): LDC 1200
DIMENSIONS
Please refer to the KLPC dimensions
Littelfuse POWR-PRO
®
LDC series Class L fuses represent
another first in fuse protection. LDC series fuses are the first
UL Listed 600 volts AC and DC Class L fuse.Since they may
be used for both AC and DC, they eliminate the concern that
AC only fuses may be inserted into DC circuits.
While LDC series fuses’ UL Listed DC interrupting rating is
more than adequate for most applications (50,000 amperes at
a 16 millisecond time constant), tests in our high power
testing laboratory have shown that this remarkable fuse is
capable of performing at much longer time constants.This
makes the fuse uniquely suited for such applications as crane
rail circuits and mass transit systems.Contact the factory for
application information for special needs such as this.
For AC-only systems, consider the use of POWR-PRO
®
KLPC series fuses.They have a full ten seconds time-delay
at 500% rated current, and have a wider range of ratings.
APPLICATIONS
UPS protection, especially for large battery circuits
DC distribution
DC variable speed drives
Protection of crane rail circuits and other large DC equipment
such as electrical power shovels, ship and dock cranes, etc.
Mass transit systems, including new light rail applications
General-purpose AC/DC circuits for mains, feeders, and
branch circuits
FEATURES/BENEFITS
■
600 V olt AC/DC rated — “All-purpose”Class L fuse
reduces inventory requirements because the need for
special fuses is eliminated.
■
UL Listed 200,000 A.I.R. AC – 50,000 A.I.R. DC —
Reliable interruption of all overcurrents up to their ratings.
Minimizes the need for time-consuming and expensive
short-circuit studies.
■
Moderate time delay — Four seconds time delay at 500%
current provides adequate time-delay for many AC
applications and most DC applications.They will withstand
most harmless overloads or line surges. If your needs
exceed the LDC capabilities, consider the use of KLPC
fuses for AC applications.
■
Selective coordination — LDC series fuses coordinate
well with all Littelfuse fuses rated 600 amperes or less.
A combination of LDC and IDSR series fuses provide a
complete 600 volt rated DC system.
■
Extremely current limiting — Maximum current limitation
reduces damage to circuits and equipment under shortcircuit conditions. Stops damaging short circuits faster than
any mechanical protective device.
23
Short Circuit
Peak Let-Thru Current**
for various fuse ratings
Current
*
800A 1200A 1600A 2000A
5,000 5,000 5,000 5,000 5,000
10,000 8,500 10,000 10,000 10,000
15,000 9,750 14,000 15,000 15,000
20,000 10,500 15,000 19,000 20,000
25,000 11,500 16,000 21,000 25,000
30,000 12,000 17,000 22,000 26,000
35,000 12,500 18,000 23,000 28,000
40,000 13,500 19,000 24,000 30,000
50,000 14,000 21,000 26,000 32,000
60,000 15,000 22,000 28,000 34,000
80,000 16,000 24,000 30,000 36,000
100,000 18,000 25,000 33,000 40,000
150,000 20,000 30,000 38,000 44,000
200,000 23,000 32,000 41,000 46,000
LDC Series POWR-PRO®Class L Fuses
600 V AC/DC■150 – 2000 Amperes
* Prospective RMS Symmetrical Amperes Short-Circuit
Current
** Apparent RMS Symmetrical
Note: Data derived from Peak Let-Thru Curves
Current-Limiting Effects
of LDC (600V) fuses
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
2000
3000
4000
6000
8000
10000
20000
30000
40000
60000
80000
100000
200000
300000
400000
600000
800000
1000000
100
200
300
400
600
800
1000
800A
1200A
1600A
2000A
TIME IN SECONDS
CURRENT IN AMPERES
2000
3000
4000
6000
8000
10000
20000
30000
40000
60000
80000
100000
200000
100
200
300
400
600
800
1000
100
200
300
400
600
800
1000
2000
3000
4000
6000
8000
10000
20000
30000
40000
60000
80000
100000
200000
300000
400000
600000
800000
1000000
2000A
1600A
1200A
800A
PEAK LET-THRU IN AMPERES
AVAILABLE FAULT CURRENT
SYMMETRICAL R. M. S. AMPERES
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