Class RK5 Dual Element Time Delay Fuse
• Provides motor overload, ground fault and short-circuit protection. When used in circuits subject to surge currents such as those caused by motors, transformers and other inductive
components, these fuses can be sized close to full-load amperes to give maximum overcurrent protection.
• Permits the use of smaller and less costly switches. The timedelay feature makes it possible to use fuse ampere ratings which are much smaller than those of non-time-delay fuses. Considerable cost saving occurs by permitting the use of smaller size switches, panels and fuses themselves.
• Provides a higher degree of short-circuit protection (greater current-limitation) in circuits in which surge currents or temporary overloads occur.
• Helps protect motors against burnout from overloads.
• Gives motor running back-up protection to motors without extra costs.
• Helps protect motors against burnout from single phasing on three phase systems.
• Simplifies and improves blackout prevention (selective coordination).
• Dual-element fuses can be applied in circuits subject to temporary motor overloads and surge currents to provide both high-performance, short-circuit and overload protection.
• The overload element provides protection against low level overcurrent of overloads and will hold an overload which is five times greater than the ampere rating of the fuse for a minimum of ten seconds.