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These fuses are the only true dual-element time-delay CC fuses specifically engineered for motor branch circuit protection.
They provide Type II protection (no damage) to both NEMA-rated and the more sensitive IEC (International Electromechanical Commission) type motor circuit components.
CCMR series fuses are now available in larger sizes — from 35 to 60 amperes! No other 600V fuse is available with this current carrying capacity in a package this small.
Compared to other UL Listed fuses, Class CC fuses are the most current limiting, rating for rating.
Because they are physically compact, they provide this superior protection in a fraction of the space required by other fuse classes.
For example, when 600V three-pole, 30 ampere Class R fuse blocks are replaced by Littelfuse Class CC fuse blocks, panel-mounting space is reduced approximately 70%. This is especially important when a panel contains many fuses to protect multiple circuit components.
Applications:
Three types of Class CC Fuses, specifically designed to protect different types of components:
- Motor protection – CCMR series; dual-element, time-delay fuses specifically designed to protect motor circuits up to 40 HP**.
- Small transformer protection (control power transformers) – KLDR series, time-delay fuses designed to withstand the high magnetizing inrush of transformers.
- General purpose protection of equipment requiring fast overload protection – KLKR series, fast-acting fuses used for protection of equipment containing solid-state devices or other electronic components requiring fast response on overloads.
Safety:
- 200,000 A.I.R. — Reliable interruption of all overcurrents up to 200,000 amperes.
- Extremely current limiting — Reduces damage caused by heating and magnetic effects of short-circuit currents…stops damaging short-circuit faster than any mechanical protective device.
Space Saving:
- Class CC fuses are the smallest 600V, 200,000 A.I.R. fuses approved for branch circuit protection.
Economical
Current limiting design often permits use of readily available, less costly equipment.
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