BUSSMANN
Effective May 2016
Technical Data 1018 Supersedes July 2013
SERIES
Fusetron 600V Class RK5
FRS-R 600 Vac/300 Vdc, 65-600 A, dual element, time-delay fuses
Catalog symbol: Features:
FRS-R-(amp) Provides motor overload, ground fault
and short-circuit protection. When used in
circuits subject to surge currents such as
Description:
those caused by motors, transformers and
other inductive components, these fuses
Advanced protection, energy efficient Class RK5
can be sized close to full-load amps to give
dual element, current-limiting, time-delay fuses.
maximum overcurrent protection
Time-delay 10 seconds (minimum) at 500% of
rated current.
The time-delay feature makes it possible
to use fuse amp ratings which are much
smaller than those of non-time delay
Specifications:
fuses. Considerable cost saving occurs by
permitting the use of smaller size switches,
Ratings
panels and fuses themselves
Volts 600Vac, 300Vdc
Provides a good degree of short-circuit
Amps 65-600A
protection (greater current-limitation) to help
protect downstream components from high
Interrupting rating
fault currents
200 kA Vac RMS Sym
Gives motor running back-up protection to
20 kA Vdc
motors without extra cost
Agency information
Helps protect motors against burnout from
overloads and single-phasing when sized
UL Listed, Std. 248-12, Class RK5, Guide
properly
JDDZ, File E4273
Simplifies and improves blackout prevention
CSA Certified, C22.2 No. 248.12, Class
(selective coordination ratios)
1422-02, File 53787
Dual-element fuses can be applied in
CE
circuits subject to temporary motor
overloads and surge currents to provide
both high-performance, short-circuit and
Catalog numbers (amps)
overload protection
FRS-R-65 FRS-R-125 FRS-R-350
FRS-R-70 FRS-R-150 FRS-R-400
FRS-R-75 FRS-R-175 FRS-R-450
Dimensions - in:
FRS-R-80 FRS-R-200 FRS-R-500
A
FRS-R-90 FRS-R-225 FRS-R-600
FRS-R-100 FRS-R-250
B
FRS-R-110 FRS-R-300
Carton quantity
Amp ratings A B
Amp ratings Carton Qty. 65-100 7.88 1.11
65100 1 110-200 9.63 1.61
225-400 11.63 2.34
101200 1
201400 1 450-600 13.38 2.88
401600 1Technical Dat a 1018 Fusetron 600 V Class RK5
Effective May 2016 FRS-R 600 Vac/300 Vdc, 65-600 A,
dual element, time-delay fuses
Recommended fuse blocks Current-Limitation curves
B
400000
Fuse amps 1-Pole 2-Pole 3-Pole
300000
70-100 RM60100-1CR RM60100-2CR RM60100-3CR
110-200 RM60200-1CR RM60200-2CR RM60200-3CR
200000
225-400 RM60400-1CR RM60400-2CR RM60400-3CR
450-600 RM60600-1CR RM60600-2CR RM60100-3CR
100000
For additional information on the RM600 volt fuse blocks, see data sheet
90000
80000
No. 10489.
70000 600A
60000
400A
50000
Fuse reducers for class R fuses
40000
200A
Equipment Desired fuse Catalog numbers
30000
fuse clips (case) size (pairs) 600 V
100A
200 A 100 A NO.2621-R 20000
400 A 100 A NO.2641-R
200 A NO.642-R
10000
100 A NO.2661-R 9000
8000
7000
600 A 200 A NO.2662-R
6000
400 A NO.2664-R
5000
4000
Single reducer only (pair not required).
3000
For additional information on Class R fuse reducers, see data
A
sheet No. 1118.
2000
Time-current curves - average melt
1000
Amp rating
Prospective short-circuit current - symmetrical RMS amps
300
100 Current-limiting effects
Prosp. Let-through current
S.C.C. (apparent RMS symmetrical vs. fuse rating)
100A 200A 400A 600A
5000 3000 4000 5000 5000
10,000 4000 5000 9000 10,000
15,000 4000 6000 10,000 14,000
10
20,000 5000 7000 11,000 15,000
25,000 5000 7000 12,000 17,000
30,000 5000 8000 13,000 18,000
35,000 5000 8000 13,000 18,000
40,000 6000 9000 14,000 19,000
50,000 6000 9000 14,000 20,000
1
60,000 6000 10,000 15,000 22,000
70,000 7000 11,000 17,000 23,000
80,000 7000 12,000 17,000 23,000
90,000 7000 12,000 17,000 24,000
100,000 8000 13,000 18,000 25,000
150,000 9000 14,000 21,000 27,000
0.1 200,000 9000 16,000 23,000 32,000
0.01
RM S symmetrical current in amps
2 Eaton.com/bussmannseries
Time in seconds
20
15A
30A
100
60A
100A
200A
400A
1000
600A
10,000
20,000
Instantaneous peak let-through current in amps
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
20000
30000
40000
50000
60000
70000
80000
90000
100000
200000
Amp rating