Littelfuse® INDICATOR™ Fuses…

Littelfuse
®
INDICATOR™ Fuses…
Because D O W N T I M E
i s N E V E R a n O p t i o n.
POWR-GARD Products
™
L i t t e l f u s e ’s N e w L L S R K – I D S e r i e s F u s e s
O f f e r Yo u U n m a t c h e d P e r f o r m a n c e
With the Same
At -A- Gl a n c e S i m p l i c i t y
T h e I n d i c a t o r™ H a s A l w a y s P r o v i d e d.
Initially introduced in 1994,
Littelfuse’s Indicator™ line
represents the most significant
improvement in fuse design to
emerge in the last ten years,
providing maximum protection
for your equipment against
overloads and short circuits.
So revolutionary was its technology
that it forever changed the way you
look at modern circuit protection.
FUSE IS GOOD
3
THE BEST
JUST GOT BETTER.
The new LLSRK_ID
Indicator™ Fuse is,
quite simply, the
best-performing fuse
on the market today.
FUSE IS BLOWN
4
INDICATOR™ SERIES FUSES ...
ALL OTHERS ARE BLOWN AWAY.
The new LLSRK_ID Indicator™ Fuse is
the only RK1 fuse available that shows
you, without any doubt, whether or not
it needs to be replaced. Its solid-state
design offers unmatched reliability and
can provide Type II “No Damage”
protection to sensitive IEC and NEMA
components — ensuring they are still
operational after a short circuit. Frankly,
no other fuse can compare.
Increase Uptime by
Pinpointing Open Fuses
Immediately
You lose money every time a circuit opens
and brings production to a stop. You lose
even more money every minute you spend
testing to pinpoint the blown fuse. The
patented design of the Littelfuse Indicator
window provides instant visual identification
of a down circuit in your system. Getting
you back online faster.
Maximize Safety,
Minimize Exposure to Circuits
By clearly showing whether the fuse is
open or not, Indicator Fuses minimize
the hazards of poking around an
energized circuit panel to locate the
blown fuse. You can test the circuit,
correct the problem, and be up and
running again quickly — and safely.
“No Damage” Protection
The LLSRK_ID’s advanced design also
reduces short-circuit damage to full-size
NEMA and sensitive IEC motor controllers.
It is capable of providing “No Damage”
protection to most NEMA size motor
starters.
Solid-State Reliability
Reduce Fuse Inventory
And Maintenance
Unlike most RK5 and all RK1 fuses,
Littelfuse LLSRK_ID fuses can be used
anywhere in your facility, eliminating the
need for other class RK5, one time and
renewable fuses. This reduces your
inventory costs and the chance that an
inferior fuse will be used in a circuit
where class RK1 protection is needed.
Littelfuse’s new single-chamber technology
replaces the spring-loaded designs of
conventional RK5 and RK1 time-delay
fuses. We combined a eutectic alloy with
an aerospace grade, elastomeric silicone
EPR plug to eliminate all moving parts in
a true dual-element fuse. This advancement eliminates fuse fatigue that is typical
with conventional spring-loaded fuses.
Longer Fuse Life
The solid state design of Indicator
Fuses also dramatically cuts
down on fatigue failures, enabling
them to withstand significantly
more severe motor startups or
repetitive high in-rush currents
than competitive fuse designs.
This is one of the reasons
why Indicator Fuses last
up to six times longer
than other brands.
Littelfuse Indicator™ Fuses
last up to six times longer
than other brands.
Fuse opens
in less than
1/2 cycle
Normal load current
Circuit breaker trips
TYPE I VS. TYPE II COORDINATION
Using NEMA and IEC devices, the UL 508E
and IEC 947-4-1 protection standards were
developed to define two levels of short
circuit protection in motor applications —
Type I and Type II.
Type I coordination provides only the most
basic level of protection, assuring that a
motor contactor or starter will not endanger
workers and installations during a short
circuit. It does not protect motor components from being damaged.
Type II coordination assures there is NO
DAMAGE to motor starters, overload relays
or contacts; and therefor, no expensive
and time-consuming maintenance to repair
or replace damaged equipment.
Only properly sized Class RK1, Class J
or Class CC fuses can provide Type II
protection. These fuses are designed to
react instantly (within the first half cycle)
whenever a fault occurs. This limits the
amount of damaging energy that reaches
components within the circuit.
Comparatively, mechanical devices
such as circuit breakers, MCCPs or MSPs
often take between 11/2 to four cycles to
open during a serious fault. This excessive
exposure to damaging currents is enough
to weld contacts and burn out motor
starters.
POWR-GARD Products
™
5
T h e M o s t A D VA N C E D
F u s e Te c h n o l o g y A v a i l a b l e
I s W h y t h e I n d i c a t o r™ S e r i e s
S TA N D S A PA R T f r o m
A l l t h e O t h e r B r a n d s.
Indicator Assembly
Under short circuit conditions, Littelfuse’s precision element design stops the
flow of damaging current in less than one-half cycle (0.008 seconds or less).
Littelfuse’s patented solid state overload section has been engineered to
withstand higher in-rush currents and repeated motor startups without fatigue,
virtually eliminating nuisance openings.
Thermal Overload
Element
Shock and Arc
Absorber
Precision-Formed
Short Circuit Element
6
Elastomeric EPR
Overload Module
WHY THE INDICATOR™
BEATS THE OTHER BRANDS.
The benefits of Littelfuse’s Indicator™
fuses are simple:
•
Increased uptime
•
Reduced nuisance opening
•
Reduced equipment damage
•
Improved safety
•
Reduced fuse inventory
operation and eliminate excessive heat rise.
Tightly controlled opening characteristics
also limit damaging currents and can
provide Type II “No Damage” protection
(Class RK1 and J fuses only).
Solid State Overload Section
What makes these benefits possible is
the most advanced fuse technology
available.
Precision Element Design
The elements used in Littelfuse Indicator
fuses are all computer-designed and
punched to provide consistent and reliable
performance. They are constructed of
99.9% pure metals to ensure efficient
Our patented solid state overload
section features an elastomeric silicon
EPR module and an eutectic alloy which
serve to interrupt the current only in the
event of an overload. Unlike conventional
spring-loaded fuses, which are susceptible
to fatigue and mechanical failure, our
overload section has no moving parts.
Its thermally reversible design opens
consistently and reliably during an
overload by forcing the eutectic alloy
out of the EPR module — opening
the circuit every time!
Cycling Comparison*
Nuisance openings can be a costly
side effect to higher in-rush currents
on high-efficiency motors. These
currents can cause ordinary time-delay
fuses to open needlessly unless they
are oversized to compensate.
The LLSRK_ID Indicator fuse’s solidstate, dual-element design reduces
nuisance fuse openings as well as
the headaches and unnecessary
downtime they cause. Its superior
time delay feature overrides current
surges without sacrificing protection
for sustained overloads.
Fuse Size
60A
SUPERIOR TIME-DELAY
PROTECTION
30A
Littelfuse LLSRK_ID
Buss LPSRK
Ferraz-Shamut A6DR
12A
0
1000
2000
3000
No. of Cycles
I2 t Comparison*
I 2t is a measure of how much
total heat energy passes
through a fuse before it
opens during a short-circuit.
Excessive I 2t energy can
damage circuit components
and wiring.
( @ 600VAC/100KA)
Amp Squared Seconds
100,000
80,000
60,000
Littelfuse LLSRK_ID
Buss LPSRK
Ferraz-Shamut A6DR
UL Maximum
40,000
20,000
0
12A
Peak Current Comparison*
( @ 600VAC/100KA)
30A
60A
Fuse Size
In cycling tests (measuring
how many times a fuse can
withstand the severe inrush
currents typical during motor
start-ups before prematurely
fatigue opening), Littelfuse
LLSRK_ID fuses prove to
have a much longer fuse life
compared to competitive fuses
of the same amperage and
UL Class. As a result of this
increased cycling capability,
Littelfuse LLSRK_ID fuses
need to be replaced less often,
saving you time and money.
100A
Measured against the
maximum allowable limits
set by UL Standard 248,
Littelfuse LLSRK_ID fuses
outperform competitive fuses,
allowing the least amount
of damaging I 2t heat energy
to pass through to critical
components.
20,000
Amperes
15,000
Littelfuse LLSRK_ID
Buss LPSRK
Ferraz-Shamut A6DR
UL Maximum
During a short circuit, high levels of current can
damage critical components, weld contacts, and
bend buss bars. Fuses greatly reduce damage
by limiting the amount of current that will pass
through a circuit.
10,000
5,000
0
12A
30A
60A
Fuse Size
*The above testing was performed on fuses randomly selected in the market
place. No special selection or screening was performed before testing.
100A
Measured here against competitive fuses and
the maximum limits set by UL Standard 248,
Littelfuse LLSRK_ID fuses show the lowest
Peak Let-thru Currents to safely protect critical
components and ensure long and reliable
system operation.
POWR-GARD Products
™
7
LLSRK –ID POWR-PRO SERIES
®
600 VAC Dual-Element
•
•
CLASS RK1 FUSES
• Time-Delay • 1/10
to 600 A
Reduce Your Problems!
Applications
•
•
All general-purpose circuits
•
Motors
•
Transformers
•
Solenoids
•
Fluorescent lighting
•
All system components with
high in-rush currents
Reduce downtime. The indicating
window instantly pinpoints the
open fuse.
•
Reduce fuse inventory. Unlike
most RK5 and all RK1 fuses,
Littelfuse LLSRK_ID fuses can
be used anywhere in your facility,
eliminating the need for other class
RK5, one time and renewable fuses.
Reduce nuisance openings.
Superior time delay and cycling
characteristics provides longer
fuse life.
Specifications
•
Reduce equipment damage.
Superior overload and short-circuit
protection cuts down on equipment
damage. The LLSRK_ID is extremely
current-limiting and provides IEC
Type II “No Damage” protection to
IEC and NEMA motor starters.
Interrupting ratings:
AC: 200,000 amperes
rms symmetrical
300,000 amperes
rms symmetrical
(Littelfuse self-certified)
DC: 20,000 amperes
•
Reduce accidents. Improves safety
by minimizing exposure to live circuits.
Once the window darkens it stays
dark. Other forms of blown fuse
indication require the power to
remain on, presenting a potential
safety hazard to personnel.
Ampere range:
1/10 to 600 amperes
•
The all-new LLSRK_ID Series Fuse is
Voltage ratings:
AC: 600 Volts
DC: 300 Volts
the most advanced Class RK1 fuse
available today, providing unparalleled
performance and protection to modern
circuits. In addition to our patented
Indicator™ window, the LLSRK_ID features
Approvals:
AC: UL Listed Class RK1 fuses
per UL 248 (formerly UL 198E)
(File No. E81895).
CSA certified HRCI-R
(File No. LR29862)
QPL: Federal Specification
(No. WF-1814)
DC: Littelfuse self-certified
precision formed short circuit elements
which virtually eliminate damage to
components from unexpected electrical
faults. Its all-new, solid-state overload
Ampere Ratings
section has no moving parts, virtually
1
eliminating fatigue failures common
⁄10
1
⁄8
6
⁄2
11⁄2
3
6
12
40
100
250
⁄10
16⁄10
32⁄10
61⁄4
15
45
110
300
8
⁄10
18
⁄10
31⁄2
7
171⁄2
50
125
350
⁄10
1
2
4
7 ⁄2
20
60
150
400
⁄4
11⁄8
21⁄4
41⁄2
8
25
70
175
450
⁄10
11⁄4
21⁄2
5
9
30
80
200
500
⁄10
14⁄10
28⁄10
56⁄10
10
35
90
225
600
1
⁄100
15
with other spring-loaded fuses.
2
1
3
4
1
Example Part Number (series+amperage): LLSRK 30 ID
Note: All fuses rated 1 amp and above are Indicator™ fuses.
8
POWR-GARD Products
™
400A
500A
200A
60A
100A
30A
1000000
800000
600000
1000
800
600
400
400000
300000
300
200
200000
100
80
100000
80000
60000
60
40
PEAK LET-THRU IN AMPERES
30
20
10
8
6
4
3
2
1
.8
.6
.4
600A
40000
30000
400A
200A
20000
100A
60A
10000
8000
6000
30A
4000
3000
2000
1000
800
600
.3
.2
400
300
.1
.08
.06
200
.04
.03
200000
60000
80000
100000
30000
40000
20000
6000
8000
10000
3000
4000
2000
600
800
1000
300
400
200
100
100
.02
80000
60000
100000
40000
30000
20000
8000
6000
10000
4000
3000
2000
800
600
1000
400
300
200
100
80
60
40
30
20
8
6
10
.01
FCC01-LLSRK-004
AVAILABLE FAULT CURRENT
SYMMETRICAL R. M. S. AMPERES
10970
Dimensions
A
A
C
E
B
D
D
B
E
F
C
70 to 600A
Figure 1
Amperes
Figure 2
Refer to
Fig. No.
Dimensions in Inches (mm)
A
B
C
D
E
F
3/4
(19.1)
5/8
(15.9)
13/16
(20.6)
5/8
(15.9)
—
1/10 – 30
1
5
(127.0)
35 – 60
1
5-1/2
(139.7)
1
(25.4)
5/8
(15.9)
1-1/16
(27.0)
7/8
(22.2)
—
70 – 100
2
7-7/8
(200.0)
1-1/4
(31.8)
1-1/16
(27.0)
1-5/16
(33.3)
1-1/2
(38.1)
1/4
(6.4)
110 – 200
2
9-5/8
(244.5)
1-3/4
(44.5)
1-15/32
(37.3)
1-27/32
(46.8)
2-3/32
(53.2)
7/16
(11.1)
225 – 400
2
11-5/8
(295.3)
2-1/2
(63.5)
2
(50.8)
2-19/32
(65.9)
2-27/32
(72.2)
5/8
(15.9)
450 – 600
2
13-3/8
(339.7)
3
(76.2)
2-13/32
(61.1)
3-3/32
(78.6)
3-11/32
(84.93)
3/4
(19.1)
POWR-GARD Products
™
9
FLNR–ID/FLSR–ID SERIES INDICATOR™
250/600 VAC Dual-Element
•
• Time-Delay • 1/10
•
CLASS RK5 FUSES
to 600 A
To complement the LLSRK_ID Series,
Specifications
Littelfuse affers several other Indicator™
Voltage ratings:
AC: 250 Volts
600 Volts
DC: 125 Volts
300 Volts
lines to meet all your protections needs.
Littelfuse FLNR_ID and FLSR_ID Series
Indicator™ fuses provide “At a Glance”
visual recognition of a blown fuse. Their
patented solid state design provides
superior performance and maximum
reliability in a true dual-element design.
Applications
FLNR_ID and FLSR_ID Series
(FLNR_ID)
(FLSR_ID)
(FLNR_ID)
(FLSR_ID)
Interrupting ratings:
AC: 200,000 amperes
rms symmetrical
300,000 amperes
rms symmetrical
(Littelfuse self-certified)
DC: 20,000 amperes
Ampere range:
1/10 to 600 amperes
•
Service entrance switches
•
Switchboard main and
feeder switches
•
Motor control center mains and
motor branch circuits
•
Individual fused combination
motor controllers
•
Distribution panelboards
•
Industrial control panels
•
Protection of fully-rated
panelboards and loadcenters
•
All general purpose circuits
Approvals:
AC: UL Listed Class RK5 fuses
per UL 248 (formerly UL 198E)
(File No. E81895)
CSA Certified HRCI-R per
C22.2 #106
(File No. LR29862)
DC: FLNR: UL Listed 125 Volts
per UL 198L (File No. E81895)
FLSR: UL Listed 300 Volts
per UL 198L (File No. E81895)
MSHA 300 Volt listing
Federal Specification No.
WF1814 (QPL)
Recommended Fuse Blocks
LR250 series (for FLNR_ID series fuses)
LR600 series (for FLSR_ID series fuses)
Refer to Fuse Block section of the latest Powr-Gard
Products Catalog for additional information.
Ampere Ratings
⁄10**
⁄8
15
⁄100
2
⁄10
1
⁄4
3
⁄10
4
⁄10
1
⁄2
⁄10
⁄10
1
11⁄8
11⁄4
14⁄10
11⁄2
16⁄10
1
6
1
8
⁄10
2
21⁄4
21⁄2
28⁄10
3
32⁄10
31⁄2
18
4
41⁄2
5
56⁄10
6
61⁄4
7
71⁄2
8
9
10
12
15
171⁄2
20
25
30
35
40
45
50
60
70
75*
**FLNR only
Example Part Number (series+amperage): FLSR 100 ID
Note: All 600 volt fuses rated 1 amp and above are Indicator fuses.
All 250 volt fuses rated 35 amp and above are Indicator fuses.
10
POWR-GARD Products
™
80
90
100
110
125
150
175
200
225
250
300
350
400
450
500
600
FLNR_ID
1000
800
600
600
400
400
300
300
200
200
100
80
100
80
60
60
40
40
30
30
20
20
TIME IN SECONDS
TIME IN SECONDS
FLSR_ID
400A 600A
200A
10
8
6
4
3
2
1
.8
100A
60A
200A
400A 600A
6
4
3
2
1
.8
100000
80000
60000
40000
30000
20000
10000
8000
6000
4000
3000
2000
1000
800
600
400
300
200
100
80
60
30
10
8
6
5
1000000
800000
600000
400000
300000
200000
100000
80000
60000
40000
30000
20000
10000
8000
.01
6000
.02
.01
4000
.03
.02
3000
.06
.05
.04
.03
2000
.04
1000
800
.1
.08
.06
600
.1
.08
300
.2
400
.3
.2
200
.4
.3
100
80
.6
.4
60
50
30A
10
8
.6
CURRENT IN AMPERES
15A
20
100A
40
60A
1000
800
CURRENT IN AMPERES
Dimensions
A
A
F
K
G
B
D
35 – 60
70 – 100
110 – 200
225 – 400
450 – 600
D
G
J
C
70-600A
FIG. 1
1/10 – 30
F
B
H
E
Amperes
E
C
Refer to
Fig. No.
FIG. 2
Dimensions in Inches (mm)
Series
A
B
C
D
E
F
G
H
J
K
FLNR_ID
2
(50.8)
1/2
(12.7)
1/2
(12.7)
9/16
(14.3)
5/64
(2.0)
5/32
(4.0)
3/8
(9.5)
—
—
—
FLSR_ID
5
(127.0)
3/4
(19.1)
5/8
(15.9)
13/16
(20.6)
3/32
(2.4)
3/16
(4.8)
5/8
(15.9)
—
—
—
FLNR_ID
3
(76.2)
3/4
(19.1)
5/8
(15.9)
13/16
(20.6)
3/32
(2.4)
3/16
(4.8)
5/8
(15.9)
—
—
—
FLSR_ID
5-1/2
(139.7)
1
(25.4)
5/8
(15.9)
1-1/16
(27.0)
3/32
(2.4)
1/4
(6.4)
7/8
(22.2)
—
—
—
FLNR_ID
5-7/8
(149.2)
1
(25.4)
1-1/16
(27.0)
1-1/16
(27.0)
1/8
(3.2)
3/4
(19.1)
1-1/4
(31.8)
1/4
(6.4)
9/32
(7.1)
1/2
(12.7)
FLSR_ID
7-7/8
(200.0)
1-1/4
(31.8)
1-1/16
(27.0)
1-5/16
(33.3)
1/8
(3.2)
3/4
(19.1)
1-1/2
(38.1)
1/4
(6.4)
9/32
(7.1)
1/2
(12.7)
FLNR_ID
7-1/8
(181.0)
1-1/2
(38.1)
1-15/32
(37.3)
1-19/32
(40.5)
3/16
(4.8)
1-1/8
(28.6)
1-27/32
(46.8)
7/16
(11.1)
9/32
(7.1)
11/16
(17.5)
FLSR_ID
9-5/8
(244.5)
1-3/4
(44.5)
1-15/32
(37.3)
1-27/32
(46.8)
3/16
(4.8)
1-1/8
(28.6)
2-3/32
(53.2)
7/16
(11.1)
9/32
(7.1)
11/16
(17.5)
FLNR_ID
8-5/8
(219.1)
2
(50.8)
1-15/16
(49.2)
2-3/32
(53.2)
1/4
(6.4)
1-5/8
(41.3)
2-11/32
(59.5)
5/8
(15.9)
13/32
(10.3)
15/16
(23.8)
FLSR_ID
11-5/8
(295.3)
2-1/2
(63.5)
2
(50.8)
2-19/32
(65.9)
1/4
(6.4)
1-5/8
(41.3)
2-27/32
(72.2)
5/8
(15.9)
13/32
(10.3)
15/16
(23.8)
FLNR_ID
10-3/8
(263.5)
2-1/2
(63.5)
2-3/8
(60.3)
2-19/32
(65.9)
1/4
(6.4)
2
(50.8)
2-27/32
(72.2)
3/4
(19.1)
17/32
(13.5)
1-1/8
(28.6)
FLSR_ID
13-3/8
(339.7)
3
(76.2)
2-13/32
(61.1)
3-3/32
(78.6)
1/4
(6.4)
2
(50.8)
3-11/32
(84.93)
3/4
(19.1)
17/32
(13.5)
1-1/8
(28.6)
1
1
2
2
2
2
11
IDSR SERIES INDICATOR™ POWR-PRO
®
600 VAC Time-Delay
•
• 1/10
•
CLASS RK5 FUSES
to 600 A
Specifications
The Littelfuse IDSR Indicator™ fuse
was the first indicating power fuse
ever, forever changing the way
you have looked at modern circuit
protection. POWR-PRO® Indicator™
fuses feature a true dual-element
fuse design incorporating leading
edge metallurgy to eliminate all
moving parts. This provides superior
time delay to override current surges
without sacrificing protection for
sustained overloads.
Voltage ratings:
AC: 600 Volts
DC: 600 Volts
(Min. 75 volts AC/DC required
for indication)
Interrupting ratings:
AC: 200,000 amperes
rms symmetrical.
300,000 amperes
rms symmetrical
(Littelfuse self-certified)
DC: 20,000 amperes
Applications
IDSR Series
•
DC circuits
•
All general-purpose circuits
•
Motors
•
Transformers
•
Solenoids
•
Fluorescent lighting
•
All system components with
high in-rush currents
Ampere range:
1/10 to 600 amperes
Approvals:
UL Listed Class RK5 fuses
per UL 248 (formerly 198E)
and UL 198M (File No. E81895).
CSA certified HRCI-R
(File No. LR29862)
MSHA 600V Listing
Patent No. 5,345,210
Recommended Fuse Blocks
LR600 series
Refer to Fuse Block section of the latest Powr-Gard
Products Catalog for additional information.
Ampere Ratings
⁄10
⁄8
15
⁄100
2
⁄10
1
⁄4
3
⁄10
4
⁄10
⁄2
⁄10
8
⁄10
1
11⁄8
11⁄4
14⁄10
1
1
1
6
11⁄2
16⁄10
18
⁄10
2
21⁄4
21⁄2
28⁄10
3
32⁄10
31⁄2
4
41⁄2
5
56⁄10
6
61⁄4
7
71⁄2
8
9
10
12
15
171⁄2
20
25
30
35
40
45
50
60
70
80
90
100
110
125
150
175
200
225
250
300
350
400
450
500
600
Example Part Number (series+amperage): IDSR 30
400A
600A
200A
60A
100A
30A
15A
Note: All fuses rated 1 amp and above are Indicator™ fuses.
1000
800
600
1000000
800000
600000
400
300
400000
300000
200
200000
100
80
60
100000
80000
60000
PEAK LET-THRU IN AMPERES
20
10
8
6
4
3
2
1.0
.8
.6
.4
.3
15A
4000
3000
2000
60000
80000
100000
30000
40000
20000
6000
8000
10000
3000
4000
2000
600
800
1000
300
400
60
80
100
30
40
20
6
8
10
200
Current in Amperes
AVAILABLE FAULT CURRENT
SYMMETRICAL R. M. S. AMPERES
200000
60000
80000
100000
30000
40000
20000
6000
8000
10000
3000
4000
2000
600
800
1000
300
400
100
100
.02
™
30A
200
.04
.03
POWR-GARD Products
60A
10000
8000
6000
400
300
.10
.08
.06
12
200A
100A
20000
1000
800
600
.2
.01
600A
400A
40000
30000
200
Time in Seconds
40
30
JTD –ID SERIES INDICATOR™ POWR-PRO
®
600 VAC Time-Delay
•
• 8/10
•
CLASS J FUSES
to 600 A
Specifications
The compact POWR-PRO® JTD_ID
Indicator Class J fuse was designed
specifically for circuits where space
is at a premium. The current limiting
time delay JTD_ID offers a patented
true dual-element design that is ideal
for use in circuits with high in-rush
currents. Superior performance
characteristics of JTD_ID Indicator
fuses reduce nuisance fuse opening
and the blown fuse indication reduces
down-time and increases safety.
Voltage ratings:
AC: 600 Volts
DC: Contact Factory
Interrupting ratings:
AC: 200,000 amperes
rms symmetrical.
300,000 amperes
rms symmetrical
(Littelfuse self-certified)
Ampere range:
8/10 to 600 amperes
Applications
Fused combination motor
controllers to provide IEC Type II
(no damage) motor branch-circuit
short-circuit protection
•
Motor control centers
•
Transformer protection
Recommended Fuse Blocks
•
Protection for UL Listed series-rated
molded case circuit breaker panels
LJ600 series
•
General purpose circuits: mains,
feeders and branch circuits (especially
when space is at a premium)
Refer to Fuse Block section of the latest Powr-Gard
Products Catalog for additional information.
Ampere Ratings
8
⁄10
1
11/4
11/2
16/10
18/10
2
21/4
21/2
28/10
3
32/10
31/2
4
41/2
5
56/10
6
7
8
9
10
12
15
171/2
20
25
30
35
40
45
50
60
70
80
90
100
110
125
150
175
200
225
250
300
400
450
500
600
600A
1000000
PEAK LET-THRU IN AMPERES
400A
200A
60A
100A
1000
30A
15A
Example Part Number (series+amperage): JTD 60 ID
100
TIME IN SECONDS
JTD_ID Series
Approvals:
UL Listed Class J fuses per UL 248
(formerly 198C) (File No. E81895).
CSA certified HRCI-J per C22.2 #106
(File No. LR29862)
•
10
1
100000
600A
400A
200A
100A
60A
10000
30A
15A
12A
5.6A
1000
.1
100
100
.01
1
10
100
1000
10000
1000
10000
100000 200000
AVAILABLE FAULT
SYMMETRICAL R.M.S. AMPERES
CURRENT IN AMPERES
POWR-GARD Products
™
13
MOTOR PROTECTION TABLES
•
Based on Motor Full Load Amps
Selection of Class RK5 (FLNR_ID/FLSR_ID & IDSR Series) or POWR-PRO® Class RK1 (LLSRK_ID Series) Fuses
Using AC Motor Protection
Tables to Select Fuse Ratings
Time delay RK1 and RK5 fuse ratings
selected in accordance with the following
recommendations also meet NEC
requirements for Motor Branch-circuit
and Short Circuit Protection.
Selecting Fuses for
Motor Running Protection
Based on Motor Horsepower
Motor horsepower and motor full load
amperes (FLA) shown are taken from
NEC Tables 430-148 through 430-150
covering standard speed AC motors with
normal torque characteristics. Fuse ratings
for motors with special characteristics
may need to vary from given values.
If motor running protection will be provided
by the fuses, select fuse ratings for correct
type of motor from Motor Protection Table
Columns headed, “When No Overload
Relays Are Used.”
If overload relays will provide principal
motor running protection, select fuse
ratings for correct type of motor from
Motor Protection Table Columns headed,
“Back-up Running Protection.” Fuse
ratings selected from these columns
coordinate with most UL Class 10 and
20 overload relays which cover over
90% of motor applications.
Selecting Fuses for
Motor Running Protection
Based on Motor Actual
Full Load Currents
Better protection is achieved when
fuse ratings are based on motor actual
FLA as obtained from motor nameplates.
Locate motor nameplate FLA in the
column appropriate for the type motor
and type of protection required. Read
to the left and obtain the recommended
ampere rating.
14
POWR-GARD Products
™
Motor Running Protection
Back-up Motor Running Protection
(Used without properly sized overload relays)
Motor Full-Load Amps
(Used with properly sized overload relays)
Motor Full-Load Amps
Slo-Blo or
LittelPeak
Fuse
Ampere
Rating
Motor Service
Factor ≥ 1.15
or
With Temp. Rise
≤ 40°C
Motor Service
Factor < 1.15
or
With Temp.Rise
> 40°C
Motor Service
Factor ≥ 1.15
or
With Temp. Rise
≤ 40°C
Motor Service
Factor < 1.15
or
With Temp. Rise
> 40°C
1/10
1/8
15/100
2/10
1/4
0.08–0.09
0.10–0.11
0.12–0.15
0.16–0.19
0.20–0.23
0.09–0.10
0.11–0.125
0.14–0.15
0.18–0.20
0.22–0.25
0–0.08
0.09–0.10
0.11–0.12
0.13–0.16
0.17–0.20
0–0.09
0.10–0.11
0.12–0.13
0.14–0.17
0.18–0.22
3/10
4/10
1/2
6/10
8/10
0.24–0.30
0.32–0.39
0.40–0.47
0.48–0.60
0.64–0.79
0.27–0.30
0.35–0.40
0.44–0.50
0.53–0.60
0.70–0.80
0.21–0.24
0.25–0.32
0.33–0.40
0.41–0.48
0.49–0.64
0.23–0.26
0.27–0.35
0.36–0.43
0.44–0.52
0.53–0.70
1
1-1/8
1-1/4
1-4/10
1-1/2
0.80–0.89
0.90–0.99
1.00–1.11
1.12–1.19
1.20–1.27
0.87–0.97
0.98–1.08
1.09–1.21
1.22–1.30
1.31–1.39
0.65–0.80
0.81–0.90
0.91–1.00
1.01–1.12
1.13–1.20
0.71–0.87
0.88–0.98
0.99–1.09
1.10–1.22
1.23–1.30
1-6/10
1-8/10
2
2-1/4
2-1/2
1.28–1.43
1.44–1.59
1.60–1.79
1.80–1.99
2.00–2.23
1.40–1.56
1.57–1.73
1.74–1.95
1.96–2.17
2.18–2.43
1.21–1.28
1.29–1.44
1.45–1.60
1.61–1.80
1.81–2.00
1.31–1.39
1.40–1.57
1.58–1.74
1.75–1.96
1.97–2.17
2-8/10
3
3-2/10
3-1/2
4
2.24–2.39
2.40–2.55
2.56–2.79
2.80–3.19
3.20–3.59
2.44–2.60
2.61–2.78
2.79–3.04
3.05–3.47
3.48–3.91
2.01–2.24
2.25–2.40
2.41–2.56
2.57–2.80
2.81–3.20
2.18–2.43
2.44–2.60
2.61–2.78
2.79–3.04
3.05–3.48
4-1/2
5
5-6/10
6
6-1/4
3.60–3.99
4.00–4.47
4.48–4.79
4.80–4.99
5.00–5.59
3.92–4.34
4.35–4.86
4.87–5.21
5.22–5.43
5.44–6.08
3.21–3.60
3.61–4.00
4.01–4.48
4.49–4.80
4.81–5.00
3.49–3.91
3.92–4.35
4.36–4.87
4.88–5.22
5.23–5.43
7
7-1/2
8
9
10
5.60–5.99
6.00–6.39
6.40–7.19
7.20–7.99
8.00–9.59
6.09–6.52
6.53–6.95
6.96–7.82
7.83–8.69
8.70–10.00
5.01–5.60
5.61–6.00
6.01–6.40
6.41–7.20
7.21–8.00
5.44–6.09
6.10–6.52
6.53–6.96
6.97–7.83
7.84–8.70
12
15
17-1/2
20
25
9.60–11.99
12.00–13.99
14.00–15.99
16.00–19.99
20.00–23.99
10.44–12.00
13.05–15.00
15.22–17.39
17.40–20.00
21.74–25.00
8.01–9.60
9.61–12.00
12.01–14.00
14.01–16.00
16.01–20.00
8.71–10.43
10.44–13.04
13.05– 15.21
15.22–17.39
17.40–21.74
30
35
40
45
50
24.00–27.99
28.00–31.99
32.00–35.99
36.00–39.99
40.00–47.99
26.09–30.00
30.44–34.78
34.79–39.12
39.13–43.47
43.48–50.00
20.01–24.00
24.01–28.00
28.01–32.00
32.01–36.00
36.01–40.00
21.75–26.09
26.10–30.43
30.44–37.78
37.79–39.13
39.14–43.48
60
70
75
80
90
48.00–55.99
56.00–59.99
60.00–63.99
64.00–71.99
72.00–79.99
52.17–60.00
60.87–65.21
65.22–69.56
69.57–78.25
78.26–86.95
40.01–48.00
48.01–56.00
56.01–60.00
60.01–64.00
64.01–72.00
43.49–52.17
52.18–60.87
60.88–65.22
65.23–69.57
69.58–78.26
100
110
125
150
175
80.00–87.99
88.00–99.99
100.00–119.99
120.00–139.99
140.00–159.99
86.96–95.64
95.65–108.69
108.70–125.00
131.30–150.00
152.17–173.90
72.01–80.00
80.01–88.00
88.01–100.00
100.01–120.00
120.01–140.00
78.27–86.96
86.97–95.65
95.66–108.70
108.71–130.43
130.44–152.17
200
225
250
300
350
160.00–179.99
180.00–199.99
200.00–239.99
240.00–279.99
280.00–319.99
173.91–195.64
195.65–217.38
217.39–250.00
260.87–300.00
304.35–347.82
140.01–160.00
160.01–180.00
180.01–200.00
200.01–240.00
240.01–280.00
152.18–173.91
173.92–195.62
195.63–217.39
217.40–260.87
260.88–304.35
400
450
500
600
320.00–359.99
360.00–399.99
400.00–479.99
480.00–600.00
347.83–391.29
391.30–434.77
434.78–500.00
521.74–600.00
280.01–320.00
320.01–360.00
360.01–400.00
400.01–480.00
304.36–347.83
347.84–391.30
391.31–434.78
434.79–521.74
MOTOR PROTECTION TABLES
•
Based on Motor Horsepower
Selection of Class RK5 (FLNR_ID/FLSR_ID & IDSR Series) or POWR-PRO® Class RK1 (LLSRK_ID Series) Fuses
Without Overload Relays
Motor
HP
Full
Load
Amps
MSF
≥ 1.15
or
Temp Rise
≤ 40°C
MSF
< 1.15
or
Temp. Rise
> 40°C
With Overload Relays
MSF
≥ 1.15
or
Temp. Rise
≤ 40°C
Without Overload Relays
MSF
< 1.15
or
Temp. Rise
> 40°C
Switch
or Fuse
Clip
Rating
5-6/10
7
9
12
17-1/2
20
25
30
30
30
30
30
30
30
30
30
2-8/10
3-1/2
4-1/2
6
8
10
12
15
20
35
50
60
30
30
30
30
30
30
30
30
30
60
60
60
3
4-1/2
6
8
9
15
25
30*
40
60
75
90
110
150
175
225
300
350
450
500
30
30
30
30
30
30
30
60
60
60
100
100
200
200
200
400
400
400
600
600
2-8/10
4
5
7-1/2
8
12
17-1/2
30
35
50
70
80
100
125
150
200
225
300
400
450
600
30
30
30
30
30
30
30
30
60
60
100
100
100
200
200
200
400
400
400
600
600
120 VOLT 1-PHASE MOTORS (120V CIRCUIT)
1/6
1/4
1/3
1/2
3/4
1
1-1/2
2
4.4
5.8
7.2
9.8
13.8
16
20
24
5
7
9
12
15
20
25
30
5
6-1/4
8
10
15
17-1/2
20
25
5-6/10
7-1/2
9
15
17-1/2
20
25
30
2.2
2.9
3.6
4.9
6.9
8
10
12
17
28
40
50
2-1/2
3-1/2
4-1/2
5-6/10
8
10
12
15
20
35
50
60
2-1/2
3-2/10
4
5-6/10
7-1/2
9
10
12
17-1/2
30*
45
50
2-8/10
4
4-1/2
6-1/4
9
10
15
15
25
35
50
70
200 VOLT 3-PHASE MOTORS (208V CIRCUIT)
1/2
3/4
1
1-1/2
2
3
5
7-1/2
10
15
20
25
30
40
50
60
75
100
125
150
2.5
3.7
4.8
6.9
7.8
11
17.5
25.3
32.2
48.3
62.1
78.2
92
120
150
177
221
285
359
414
3
4-1/2
6
8
9
12
20
30*
40
60
75
90
110
150
175
200*
250
350
400*
500
2-8/10
4
5-6/10
7-1/2
8
12
20
25*
35
50
70
80
100*
125
150
200*
250
300
400*
450
3-2/10
5
6-1/4
7-1/2
10
15
25
35
45
70†
80
100
125
150
200
225
300
400
450
600
MSF
< 1.15
or
Temp. Rise
> 40°C
With Overload Relays
MSF
≥ 1.15
or
Temp. Rise
≤ 40°C
MSF
< 1.15
or
Temp. Rise
> 40°C
Switch
or Fuse
Clip
Rating
1-4/10
2
2-1/2
3-1/2
4
5-6/10
9
15
17-1/2
25
35
40
50
60*
75
90
125
150
200
225
300
30
30
30
30
30
30
30
30
30
30
60
60
60
100
100
100
200
200
200
400
400
1-1/8
1-6/10
2
3
3-2/10
4-1/2
7-1/2
12
15
20
30
35
40
50
60
75
90
125
150
175
225
30
30
30
30
30
30
30
30
30
30
30
60
60
60
60
100
100
200
200
200
400
460 VOLT 3-PHASE MOTORS (480V CIRCUIT)
230 VOLT 1-PHASE MOTORS (240V CIRCUIT)
1/6
1/4
1/3
1/2
3/4
1
1-1/2
2
3
5
7-1/2
10
Motor
HP
Full
Load
Amps
MSF
≥ 1.15
or
Temp Rise
≤ 40°C
1/2
3/4
1
1-1/2
2
3
5
7-1/2
10
15
20
25
30
40
50
60
75
100
125
150
200
1.1
1.6
2.1
3.0
3.4
4.8
7.6
11
14
21
27
34
40
54
65
77
96
124
156
180
240
1-4/10
2
2-1/2
3-1/2
4
5-6/10
9
12
17-1/2
25
30*
40
50
60*
80
90
110
150
175
225
300
1-1/4
1-8/10
2-1/4
3-2/10
3-1/2
5
8
12
15
20
30*
35
45
60*
70
80
110
125
175
200*
250
1-4/10
2
2-8/10
4
4-1/2
6
10
15
17-1/2
30
35
45
50
70
90
100
125
175
200
225
300
575 VOLT 3-PHASE MOTORS (600V CIRCUIT)
1/2
3/4
1
1-1/2
2
3
5
7-1/2
10
15
20
25
30
40
50
60
75
100
125
150
200
0.9
1.3
1.7
2.4
2.7
3.9
6.1
9
11
17
22
27
32
41
52
62
77
99
125
144
192
1-1/8
1-6/10
2
3
3-2/10
4-1/2
7-1/2
10
12
20
25
30*
40
50
60
75
90
110
150
175
225
1
1-4/10
1-8/10
2-1/2
2-8/10
4
7
10
12
17-1/2
25
30*
35
45
60
70
80
110
125
150
200*
1-1/8
1-6/10
2-1/4
3
3-1/2
5
8
12
15
25
30
35
40
60
70†
80
100
125
175
200
250
230 VOLT 3-PHASE MOTORS (240V CIRCUIT)
1/2
3/4
1
1-1/2
2
3
5
7-1/2
10
15
20
25
30
40
50
60
75
100
125
150
200
2.2
3.2
4.2
6.0
6.8
9.6
15.2
22
28
42
54
68
80
104
130
154
192
248
312
360
480
2-8/10
4
5
7-1/2
8
12
17-1/2
25
35
50
60*
80
100
125
150
175
225
300
350
450
600
2-1/2
3-1/2
4-1/2
6-1/4
7-1/2
10
17-1/2
25
30*
45
60*
75
90
110
150
175
200*
250
350
400*
500
2-8/10
4
5-6/10
7-1/2
9
12
20
30
35
60
70
90
100
150
175
200
250
350
400
450
600
NOTES
MSF = Motor Service Factor
* Fuse reducers required
† 100 amp switch required
POWR-GARD Products
™
15
MOTOR PROTECTION TABLES
•
Based on Motor Full Load Amps
Selection of POWR-PRO® Class J (JTD_ID/JTD Series) Fuses
MOTOR F.L.A.
JTD_ID/JTD
AMPERE RATING
MOTOR F.L.A.
JTD_ID/JTD
AMPERE RATING
MOTOR F.L.A.
JTD AMPERE RATING
0.00 – 0.60
0.61 – 0.80
0.81 – 1.00
8/10
1
1-1/4
12.1 – 14.5
14.6 – 17.0
17.1 – 21.0
17-1/2
20
25
76.1 – 84.0
84.1 – 90.0
90.1 – 102
110
125
150
1.01 – 1.20
1.21 – 1.65
1.66 – 2.00
1-1/2
2
2-1/2
21.1 – 25.0
25.1 – 28.5
28.6 – 34.0
30
35
40
103 – 125
126 – 144
145 – 162
175
200
225
2.01 – 2.40
2.41 – 3.30
3.31 – 4.10
3
4
5
34.1 – 37.0
37.1 – 41.0
41.1 – 48.0
45
50
60
163 – 180
181 – 204
205 – 240
250
300
350
4.11 – 4.90
4.91 – 6.40
6.41 – 8.00
6
8
10
48.1 – 52.0
52.1 – 59.0
59.1 – 66.0
70
80
90
241 – 288
289 – 312
313 – 360
400
450
500
8.01 – 9.80
9.81 – 12.0
12
15
66.1 – 76.0
100
361 – 432
600
NOTE: FOR SEVERE MOTOR STARTING CONDITIONS, FUSES MAY BE SIZED UP TO 225% MOTOR F.L.A. (See NEC Section 430-52 for exceptions)
Consolidate Your Inventory… Reduce Your Costs!
Consolidating inventory by eliminating
numerous fuse series means fewer SKUs,
lower inventory costs, and in some cases,
better protection!
Although the physical sizes are the same among the ampere ratings of Class RK1,
RK5, H/K5 and renewable fuses, the superior performance of Littelfuse Indicator™
fuses allows you to consolidate inventories by replacing many older, conventional
fuses with limited performance characteristics.
…If You Have This Fuse
You Should Use
This Fuse…
Littelfuse
Bussmann
Ferraz
Other
KLPC
or LDC
KLPC
KLLU
KRPC
KLU
KTU
A4BQ
A4BY
A4BT
LCL
LCU
Class RK1
(600 Volts)
LLSRK_ID
FLSR
FLSR_ID
NLS*
RLS*
LLSRK
KLSR*
FRSR
NOS*
RES*
LPSRK
KTSR*
TRS
OTS*
RFS*
A6DR
A6KR*
GF6B
ECSR
LESRK
KOS*
ERS*
Class RK5
(250 Volts)
FLNR_ID
or FLNR
FLNR
NLN*
RLN*
LLNRK**
KLNR**
FRNR
NON*
REN*
LPNRK**
KTNR**
TR
OT*
RF*
A2DR**
A2KR**
GF6A
ECNR
LENRK**
KON*
ERN*
Class J
JTD_ID
JTD
JLS*
LPJ
JKS*
AJT
A4J*
JDL
JFL*
Class CC
(Time Delay)
CCMR
FLM
FLQ
LPCC
FNM
FNQ
ATDR
TRM
ATQ
EDCC
MEN
MEQ
KLDR
KLDR
FNQR
ATQR
HCTR
KLKR
KLK
BLS
BLF
BLN
KTKR
KTK
BBS
BAF
BAN
ATMR
SBS
OTM
ATM
HCLR
MCL
EBS
MOL
Class L
Class CC
(Fast Acting)
*Consult Article 430 of the NEC when substituting for leads with motors, or call 1-800-TEC-FUSE.
**Depends on available fault current of other application criteria.
16
POWR-GARD Products
™
AVAILABLE FREE
FROM LITTELFUSE
EDR (Electronic Designer’s
Reference) Software is a
fully integrated set of
electrical calculation tools
and design procedures.
It includes a selection of
the most commonly needed
electrical equipment sizing
tools — complete with
examples, tutorials, advice,
NEC requirements, project record
keeping and Windows’ print
and file save functions.
17
“
Not a day goes by that
I don’t use the EDR
program. It has been
an incredibly useful
tool. I loaded it onto
my laptop so I wouldn’t
have to be without it,
wherever I am. Again…
”
many, many, many thanks.
—Hugh Montague
Electrical Designer,
T&M Associates
Middletown, New Jersey
18
LITTELFUSE SOFTWARE SOLUTIONS
EDR (Electrical Designer’s
Reference) Software
The EDR software is comprehensive
set of electrical tools intended for use
by Consulting Engineers, Designers,
Plant Engineers, Contractors, and
Inspectors. The EDR software allows
users to quickly and accurately calculate
voltage drop, available fault current,
fuse sizing, service sizing, conduit fill,
etc., all in a uniform environment. This
powerful software includes multiple
calculation methods as well as help
screens, advice screens, and NEC
code references to guide users through
setting up an electrical system.
EDR includes these modules:
•
AC/DC Voltage Drop: Solves for
voltage drop, minimum conductor
size or maximum cable length.
•
Series Voltage Drop: This calculates
the incremental and end-of-line
voltage drop for a string of lighting
fixtures of other loads with variable
distances, loads, and conductor
sizes for each segment.
•
•
Fault Current: This module
calculates the system fault currents
for any radial system up to 360
simultaneous nodes or buss points.
Fuse Overcurrent Protection:
More than just a calculation, this is
a computerized design procedure
which automatically sizes fuses,
starters, disconnects and feeders
for motors. It also sizes and selects
fuses for transformers, AC units,
lighting, and general loads. It contains
fuse let through charts and provides
selective coordination and cross
references.
The Indicator™ Solution
This easy to use software analyzes
plant operations and calculates six
areas of potential cost benefits by
entering five simple variables. Based
on switching to Littelfuse Indicator™
series fuses, the annual dollar savings
are calculated. Also included are
animated demos, calculation screens,
a fuse consolidation table, and a
cross reference program.
POWR-CROSS™
Cross Reference Software
Littelfuse POWR-GARD® Products
cross-reference software makes
identifying Littelfuse product
equivalents quick and easy. Simply
type in the competitive product series
number and the program will cross it
to the Littelfuse equivalent, complete
with description and specifications.
Other features include a HELP screen
and print options in an easy to use
“Windows” format.
The Indicator Solution (top) analyzes plant
operations and helps identify potential cost savings.
Littelfuse POWR-CROSS software (bottom)
makes identifying product equivalents a snap.
For more information on Littelfuse’s software programs,
call: 1-800-TEC-FUSE (800-832-3837), or visit our web site:
www.littelfuse.com.
Fault Current
The EDR software is available FREE
from a Littelfuse representative and can
also be downloaded from
the Littelfuse web site at:
Series Voltage Drop
www.littelfuse.com.
AC/DC Voltage Drop
POWR-GARD Products
™
19
Li t telf use
®
P O W R - G A R D™ P r o d u c t s . . .
24 - H o u r Fa x - o n - D e m a n d
Pro duc t In for m a t io n ,
C a l l:
1 - 8 47 - 6 9 9 - 8 4 3 4
Littelfuse, Inc.
POWR-GARD™ Products
800 E. Northwest Highway
Des Plaines, IL 60016 USA
Phone:
Fax:
847-824-1188
847-824-5489
Orders:
Support:
800-227-0029
800-TEC-FUSE
(800-632-3873)
Web:
www.littelfuse.com
POWR-GARD Products
™
© 2001 Littelfuse, Inc. Printed in U.S.A.
Form No. PF332