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5CLS70-9R Fuses

Application Field

5CLS70-9R is a type of Low Voltage AC Distribution Fuse (ABB Low-voltage Fuses). This type of fuses can be widely applied to circuit breaker protection, lighting equipment protection, transformer protection, branch circuit protection, motor protection, and other resources of power distribution.5CLS70-9R is available for copper clad aluminum (CCA) and aluminum conductor, and it is approved by IEEE Standard 18–2002. Besides, due to its short shape, it is applicable to equipment like motor controllers and industrial control system.

Working Principle

When 5CLS70-9R is in normal condition, the fuse can limit the fault current to a certain value. When the current exceeds the limited value, bypasses also the load, thus it protect the circuit from electric arcs, and prevent the circuit from power-surge or over-current.As a choice for short stature, 5CLS70-9R is the ideal low voltage AC distribution fuse for industrial and large scale commercial use, it can easily cooperate with circuit breakers and other electric equipment.5CLS70-9R fuses consist of an arc-quenching medium, fusible element, and an enclosure.

Arc-quenching Medium

This is an important part of the fuse. It helps to minimize the duration of the fault arc and clear the fault current rapidly. Arc-quenching medium can be sand, limestone, magnesia, husk, salt or other gas etc.

Fusible Element

The fusible element of 5CLS70-9R is either a metal wire or aluminum strip that has been twisted several times. When the current through the circuit exceeds the pre-determined threshold, it will become red-hot and melted, thus causing an open circuit in which the fault current is no longer passing through.

Enclosure

The fuse is placed inside an enclosure which can help maintain the safety and ensure effective protection. It can limit the spread of fire sparks and protect users from arc flashes or in case that the fuse would experimentally be shut off.

Conclusion

5CLS70-9R fuses are the preferred choice for low voltage AC distribution fuses. In addition to its robust construction and short stature, its high level of safety and reliability also advantages it from other fuses in the market. It is suitable for circuit breaker protection, lighting equipment protection, transformer protection, branch circuit protection, motor protection, and other resources of power distribution.

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