®
Bu s s m a n n
R-Ra t e d Fu s e s
Fo r Mo t o r Circ u it P ro t e c t io n
Me d iu m Vo lt a g e
J CK, J CK-A,
J CL, & J CL-A
• The JCK-A and JCL-A are standard JCK and JCL product
with an additional Westinghouse amp guard hookeye.
• This single hookeye is on one end of the fuse and aids in the
insertion and removal of the fuse.
• R-Rated medium voltage fuses are back-up current limiting
fuses used in conjunction with medium voltage motors and
motor controllers.
• Current limiting fuses may be designated as R-Rated if they
meet the following requirements:
1. The fuse will safely interrupt all currents between its mini-
mum and maximum interrupting ratings.
2. The fuse will melt in a range of 15 to 35 seconds at a
value of 100 times the “R’ number (ANSI C37.46).
• Bussmann R-Rated current limiting fuses are designed for
use with medium voltage starters to provide short-circuit pro-
tection for the motor and motor controller.
• These fuses offer a high level of fault current interruption in a
self-contained, non-venting package which can be mounted
indoors or in an enclosure.
• Blown fuse indication on all fuses.
CATALOG SYMBOL: JCK, JCK-A, JCL, JCL-A
R-RATED
MEDIUM VOLTAGE
CURRENT LIMITING
2750V AC — JCK, JCK-A
5500V AC — JCL, JCL-A
MAX. DESIGN VOLTAGE
U.L. RECOGNIZED MAXIMUM 2540V AC — JCK, JCK-A
MAX. DESIGN VOLTAGE 5500V AC — JCL, JCL-A
2750V AC — JCK, JCK-A
U.L. RECOGNIZED MAXIMUM 5080V AC — JCL, JCL-A
U.L. RECOGNIZED
(GUIDE #M5552, FILE # E96676)
Form No. JCK & JCL
Page 1 of 3
12-21-98
SB98107
Rev. A
BIF Doc #6001