Low Voltage, Branch Circuit Rated Fuses
Low-Peak
®
time-delay fuses
KRP-C_SP Class L
Specifications
Description:
Time-delay fuse – 4
seconds (minimum) at 500% rated amps.
Dimensions:
See page 12 for Class L
dimensions.
Construction:
Glass melamine tube
with silver-plated end bells and blades.
High grade silica-sand filler to quench
fuse arc. O-ring seals to maximize
pressure build-up during
current-limiting action and ensure filler
retention.
Ratings:
Volts — 600Vac (or less)
— 300Vdc (601-2000A)
Amps — 601-6000A
(use KRP-CL for current ratings under 601A)
IR — 300,000A RMS Sym.
— 100,000A dc
Agency Information:
CE, UL Listed-Special Purpose
(meets all performance requirements of UL Standard 248-10
for Class L fuses),Guide JFHR, File E56412, CSA Certified
(200,000 AIR), Class 1422-02, File 53787, Class L per CSA
C22.2, No. 248.10.
Features and Benefits
• Time delay of four seconds at five times rating allows closer
sizing on large motor loads combined with Class L current
limitation.
• Selective coordination ratio of 2:1 (within Low-Peak fuse
family) prevents electrical shutdowns from extending
beyond the failed circuit.
• Interrupting rating of 300,000A RMS symmetrical provides
adequate ratings without obsolescence for all electrical
systems, big or small.
• Quality construction, using high-grade materials, provides
lower watts loss and operating temperatures with superior
arc quenching during current-limiting action.
Typical Applications
• Large Distribution Switchboards
• Power Panelboards
• Large Machinery Disconnects
Catalog Numbers (Amps)
KRP-C-601SP
KRP-C-650SP
KRP-C-700SP
KRP-C-750SP
KRP-C-800SP
KRP-C-801SP
KRP-C-900SP
KRP-C-1000SP KRP-C-1800SP KRP-C-3500SP
KRP-C-1100SP KRP-C-1900SP KRP-C-3800SP
KRP-C-1200SP KRP-C-2000SP KRP-C-4000SP
KRP-C-1350SP KRP-C-2001SP KRP-C-4500SP
KRP-C-1400SP KRP-C-2400SP KRP-C-5000SP
KRP-C-1500SP KRP-C-2500SP KRP-C-6000SP
KRP-C-1600SP KRP-C-3000SP
Recommended Fuse Holders & Blocks For Class L
600V Fuses
Did You Know?
SKU Reduction Through Productivity
Protector™ Program
An industrial manufacturing
plant in Springfield,
Missouri, found that SKUs in
its spare fuse inventory
were becoming excessive
and the plant could not
possibly keep a spare for
each different fuse type.
The Cooper Bussmann
®
district sales engineer
applied the new Productivity Protector program,
conducting a cross-reference analysis of all fuse
SKUs at the facility and producing an upgrade report
to identify the recommended Cooper Bussmann
®
Low-Peak® fuses to reduce the plant’s inventory.
Because more than 47 different types of fuses can
be replaced by Low-Peak fuses, the plant was able
to reduce its fuse inventory by 25%, resulting in
substantial cost savings. The plant also immediately
noted it experienced less downtime, crediting the
highest degree of current limitation provided by
Low-Peak fuse. The sales engineer also provided
plant personnel with product application support and
safety training.
Data Sheets: 1008 and 1009
• See page 9
20
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp
Low Voltage, Branch Circuit Rated Fuses
Low-Peak
®
time-delay fuses
Time-Current Characteristic Curves—Average Melt
1200A
1600A
2000A
2500A
3000A
4000A
5000A
6000A
800A
Current Limitation Curves
1000,000
Low Voltage
Branch
Circuit
Fuses
AMPERE
RATING
B
6,000A
5,000A
4,000A
3,000A
2,500A
2,000A
1,600A
1,200A
800A
601A
300
100
INSTANTANEOUS PEAK LET-THRU CURRENT IN AMPS
100,000
10
10,000
TIME IN SECONDS
A
1
10,000
PROSPECITVE SHORT-CIRCUIT CURRENT
SYMMETRICAL RMS AMPERES
.1
100,000
200,000
1,000
10,000
.01
CURRENT IN AMPERES
Data Sheets: 1008 and 1009
KRP-CL Current-limiting,
time-delay fuses
Specifications
Description:
Current-limiting, time-delay fuse.
Dimensions:
See page 12 for Class L dimensional data.
Construction:
Glass melamine tube.
Ratings:
Volts — 600Vac (or less)
Amps — 150-600A
IR — 200,000A RMS Sym.
Features and Benefits
• Time delay of four seconds at five times rating allows closer
sizing inductive loads coupled with an equivalent Class L
current limitation.
• Class L case size for amp ratings from 150A to 600A allows
downsize fusing of large Class L fused switches for improved
circuit protection.
Typical Applications
• Large Distribution Switchboards
• Power Panelboards
• Machinery Disconnects
Catalog Numbers (Amps)
KRP-CL-150
KRP-CL-200
KRP-CL-225
KRP-CL-250
KRP-CL-300
KRP-CL-350
KRP-CL-400
KRP-CL-450
KRP-CL-500
KRP-CL-600
Data Sheet: 1016
Recommended Fuse Holders & Blocks For Class L
600V Fuses
• See page 9
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp
100,000
300,000
1,000
1,000
AMPERE
RATING
21
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