cooper bussmann

KRP-C_SP Class L Low-Peak® Time-delay Fuses

  
Description:
Time-delay fuse - 4 seconds (minimum) at 500% rated amps.

Ratings:
Volts: 600Vac (or less); 300Vdc (601-2000A)
Amps: 601-6000A (use KRP-CL for current ratings under 601A)
IR: 300kA RMS Sym. 100kA 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 (200k 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 300kA 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.

General Information:
• All purpose silver-linked fuse for both overload and short-circuit protection for high capacity systems (mains and large feeders).
• Time-delay (minimum of four seconds at five times amp rating) for close sizing.
• Current-limiting action of the fuse generally affords considerable reduction in bus bracing.
• Interrupting rating of 300,000 amperes complies with NEC Sections 110-9 and 230-65 for today’s large capacity systems.
• O-ring seals maximize pressure build-up during current-limiting action and ensure filler retention.
• High grade silica-sand filler; accelerates response of fuse to short-circuits by having quenching effect upon the fuse arc.
• 99.9% pure silver fuselinks. The high conductivity of silver gives low watt loss and low operating temperature at normal current levels; maximizes total clearing I2t fault energy let-through.
• Selective coordination (blackout prevention)
• Glass melamine tube.
• Silver-plated end bells.

Typical Applications
• Large Distribution Switchboards
• Power Panelboards
• Large Machinery Disconnects

Ampere Ratings†
Catalog Number Ctn. Qty. Weight** Lbs.
Lbs. Kg.
KRP-C-601SP 1 3.75 1.7
KRP-C-650SP
KRP-C-700SP
KRP-C-750SP
KRP-C-800SP
KRP-C-801SP 1 4.5 2.041
KRP-C-900SP
KRP-C-1000SP
KRP-C-1100SP
KRP-C-1200SP
KRP-C-1350SP 1 6.5 2.948
KRP-C-1400SP
KRP-C-1500SP
KRP-C-1600SP
KRP-C-1800SP 1 8.5 3.85
KRP-C-1900SP
KRP-C-2000SP
KRP-C-2001SP 1 17.25 7.824
KRP-C-2400SP
KRP-C-2500SP
KRP-C-3000SP 1 18.25 8.278
KRP-C-3500SP 1 23.5 10.659
KRP-C-3800SP
KRP-C-4000SP
KRP-C-4500SP 1 29 13.154
KRP-C-5000SP
KRP-C-6000SP 1 36 16.329
†Special purpose rating of 300,000 AIR.
**Weight per carton.

Dimensional Data
601-2000A

2001-6000A

Time-Current Characteristic Curves-Average Melt


Current-Limitation Curves


Fuseblocks: (601 - 1200 Amps)
Catalog Number Poles
51215 1
51235 3
No reducers available.  


KRP-CL Current-limiting, time-delay fuses

Description:
Current-limiting, time-delay fuse.

Ratings:
Volts: 600Vac (or less)
Amps: 150-600A
IR: 200kA 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-225 KRP-CL-300 KRP-CL-400 KRP-CL-450
KRP-CL-200 KRP-CL-250 KRP-CL-350 KRP-CL-600 KRP-CL-500

 
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