• Class L, all-purpose silver element  fuses are ideal for protecting from both overload and short circuit damage when used with high capacity systems such as mains and large feeders
• The filler, composed of high grade silica-sand speeds up the response time of the fuse to short-circuits by having a quenching effect on the fuse arc
• 99.9% pure silver fuse element gives this unit a high Class L, all-purpose conductivity, low watt loss and low operating temperature at normal current levels capability
• Maximizes total clearing I2t fault energy let-through
• High quality construction of glass melamine and silver-plated end bells afford you peace of mind that your systems are safe
• Selective coordination ratio of 2:1 prevents electrical shutdowns from extending beyond the failed circuit so your other functions are not also cancelled
• Time-delay feature has a 4 second minimum before shutting down
• UL Listed – Special Purpose, Guide JFHR, File E56412
• CSA Certified – (200,000 AIR), Class 1422-02, File 53787
• Class L per CSA C22.2, No. 248.10
• One year warranty

The KRP-C fuses are constructed of:

• 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

Typical Applications:

• Large Distribution Switchboards
• Power Panel boards
• Machinery Disconnects

• KRP-C 601-2000A Datasheet (PDF)
• KRP-C 2001-6000A Datasheet (PDF)
• TTC Curves (PDF)
• UL Listed (PDF)
• CSA Certified (PDF)

MANUALS -

• KRP-C Manual (PDF)

COMPARISON CHART -

• View Fuse Comparison Chart

Time Delays  Match Protection To Need

Circuit trip delays need to be long enough to avoid nuisance tripping caused by harmless transients, yet quick enough to open the circuit when a hazard exists. The constant need to create these more and more specific fuses to match performance is crucial to the life cycle of often costly and vital equipment. 

There are currently four basic categories of trip delays available:

Instantaneous
Usually under 100 ms, with most at approximately 15 ms – for very sensitive circuits where low overloads of short duration may be harmful, or where specific high currents definitely should not pass.

Fast Delay
Trips in less than 10 seconds – for circuits and electronic applications where temporary overloads of 200 percent cannot be tolerated for more than a few seconds.

Slow Delay
Trips in 10 to 100 seconds – for most large transformer-coupled loads where brief overloads can be tolerated without damage. Slow delays allow turn-on surges to pass without tripping.

Very Slow Delay
Trips in more than 100 seconds – for protection of wiring where a limited overload will usually not cause damage. For example, some motors have starting current surges lasting for seconds and drawing 600 percent or more of their running current rating. Protectors with very slow delays are the answer for these applications.

RELATED ARTICLES

• What Exactly is an Electrical Fuse?
• Sometimes It's Good to Be the Weakest Link
• How Do You Know the Right Fuse for Your Circuit Protection Needs

VIEW OUR GLOSSARY