Bussmann

General Data — Selection Chart
Bussmann ® 1
200,000A or 300,000A Interrupting Rating (rms symmetrical)
Current Limiting
10,000–50,000 AIC
Buss Fuse Selection Chart (600 Volts or Less)
Circuit Load Ampere Fuse Symbol Voltage Interrupting Remarks
Rating Type Rating (a-c) Class Rating Page
(KA)
Conventional Dimensions—Class RK1, RK5 (0-600A), L (601-6000A)
All type loads 0-600A LOW-PEAK ® LPN-RK_SP 250V RK1†† 300 All-purpose fuses. 9-11
(optimum (dual-element, LPS-RK_SP 600V Unequaled for combined
overcurrent time-delay) short-circuit and
protection). 601 to LOW-PEAK ® KRP-C_SP 600V L 300 overload protection. 6-7
6000A (time-delay) (Specification grade product)
Motors, welder, 0 FUSETRON ® FRN-R 250V RK5†† 200 Moderate degree of 12
transformers, to (dual-element, FRS-R 600V current limitation. Time-delay 13
capacitor banks 600A time-delay) passes surge currents.
(circuits with heavy 0 DURA-LAG TM DLN-R 250V
inrush currents). to (dual-element, DLS-R 600V
RK5 200 14
600A time-delay)
601 to LIMITRON ® KLU 600V L 200 All-purpose fuse. Time- 8
Main, 4000A (time-delay) delay passes surge-currents.
Feeder Non-motor loads KTN-R 250V RK1†† 200 Same short-circuit protection 15
and (circuits with no 0 KTS-R 600V as LOW-PEAK fuses but
Branch heavy inrush to must be sized larger for
currents).
600A
LIMITRON ®
circuits with surge-currents;
LIMITRON fuses _____ (fast-acting)
i.e., up to 300%.
particularly suited for 601 to KTU 600V L 200 A fast acting, high 8
circuit breaker 6000A performance fuse.
protection.
Branch
General
Purpose
(noncurrent
limiting
fuses)
Reduced Dimensions For Installation in Restricted Space—Class J(0-600A), T(0-1200A), CC(0-30A), G(0-60A)
All type loads LOW-PEAK ® LPJ_SP 600V J 300 All-purpose fuses. 17
(optimum (dual-element Unequaled for combined
overcurrent time-delay) short-circuit and overload
protection).
0
protection. (Specification
__________ to
grade product)
Non-motor loads 600A LIMITRON ® JKS 600V J 200 Very similar to KTS-R 18
(circuits with no (quick acting) LIMITRON, but smaller.
heavy inrush
0 to T-TRON TM JJN 300V T 200 The space saver (⁄Ω£ the size
currents).
1200A JJS 600V of KTN-R/KTS-R).
19
Motor loads 0 to 30A LOW-PEAK ® LP-CC 600V CC 200 Rejection feature 21
(circuits with
(time-delay)
heavy in-rush
currents.)
Non-motor loads 0 to 30A LIMITRON ® KTK-R 600V CC 200 Very compact (⁄‹Ω£∑ ≈ 1⁄Ω∑); 22
(circuits with no (fast-acting) rejection feature.
heavy in-rush
currents.)
Control transformer 0 to 30A TRON ® FNQ-R 600V CC 200 Excellent for control 22
circuits and lighting (time-delay) transformer protection.
ballasts; etc.
General purpose; 1 to 20A SC SC 600V G 100 Current limiting; 20
i.e., lighting
⁄‹Ω£∑ dia. ≈ varying
panel boards. 25 to 60A 480V lengths per amp rating.
Miscellaneous 0 to ONE-TIME NON 250V H or K5† 10 Forerunners of 16
600A NOS 600V the modern
Plug fuses can 0 FUSTAT ® S 125V S 10 Base threads of Type S 26
be used for to (dual-element, differ with amp ratings.
branch circuits 30A time-delay) T and W have Edison base.
and small FUSETRON ® T 125V ** 10
T & S fuses recommended
component (dual-element, for motor circuits. W not
protection. time-delay) recommended for circuits
26
with motor loads.
Buss Type W W 125V ** 10
** UL Listed as Edison Base Plug Fuse.
† Some ampere ratings are available as UL Class K5 with a 50,000A interrupting rating.
†† RK1 and RK5 fuses fit standard switches, fuseblocks and holders; however, the rejection feature of class R switches and fuseblocks designed specifically for rejection type fuses
(RK1 and RK5) prevent the insertion of the non-rejection fuses (K1, K5, and H).