Bussmann FRS-R

Advanced protection, energy efficient Class RK5 dual-element, current-limiting, time-delay fuses with optional open fuse indication on select ratings. Time-delay — 10 second (minimum) at 500% of rated current.

Ratings:

Volts
600 Vac, 300 Vdc (1/10-30 A, 65-600 A)
600 Vac, 250 Vdc* (35-60 A)
Amps — 1/10-600 A
Interrupting rating
200 kA Vac RMS Sym
20 kA Vdc*
*certain sizes are not Vdc rated, see spec sheet for details.

Features:

Dual-element feature provides the best time-delay performance, allowing closer sizing and superior protection of motors and transformers
Closer sizing allows for smaller fuses and less costly switches
Class RK5 fuses with a 200 kA interrupting rat-ing for use in a broad range of applications
Provides motor overload, ground fault, and short-circuit protection
Helps protect motors against burnout from overloads and single-phasing when sized properly
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
Offers a 10-second (minimum) time delay at 500% the rated current
The time-delay feature makes it possible to use fuse amp ratings that are much smaller than those of non-time delay fuses. Considerable cost savings occur by permitting the use of smaller size switches, panels, and fuses themselves.
Provides current limitation to help protect down-stream components from high fault currents.
Gives motor running back-up protection to motors without extra costs.