NCLR CLASS RK1 FAST-ACTING FUSES SCLR CLASS RK1 FAST ...
NCLR CLASS RK1 FAST-ACTING FUSES SCLR CLASS RK1 FAST ... NCLR CLASS RK1 FAST-ACTING FUSES SCLR CLASS RK1 FAST ...
NCLR CLASS RK1 FAST-ACTING FUSES SCLR CLASS RK1 FAST-ACTING FUSES Catalog Number NCLR (1 - 600A) 250 Volts AC or Less Catalog Number SCLR (1 - 600A) 600 Volts AC or Less AMPERE RATINGS NCLR 250V 1 10 35 80 175 400 3 12 40 90 200 450 4 15 45 100 225 500 5 20 50 110 250 600 6 25 60 125 300 — 8 30 70 150 350 — SCLR 600V 1 8 30 70 150 350 2 10 35 80 175 400 3 12 40 90 200 450 4 15 45 100 225 500 5 20 50 110 250 600 6 25 60 125 300 — NCLR/SCLR SPECIFICATIONS Fast-Acting Voltage Rating: Ampere Rating: Interrupting Rating: Current Limiting: NCLR - 250VAC, SCLR - 600VAC 1 - 600 Amps 200,000 RMS Symmetrical Amps RK1 Fuse Agency Approvals: UL Listed, Class RK1, Guide JDDZ, File E162363 CSA Certified HRCI-R per C22.2, No. 248.12 Self-Certified DC Ratings: Voltage Rating: NCLR (1-600) 250VDC SCLR (1-600) 300VDC Interrupting Rating: NCLR/SCLR 10,000 Amperes DC BENEFITS: • No intentional time-delay; opens quickly on overload current. • Extremely current limiting silver link construction; provides superior component circuit protection. APPLICATIONS: • Recommended for protection on non-inductive loads such as lighting and resistance heating circuits. • Use to protect lower interrupting rating circuit breakers in series rated applications. RECOMMENDED FUSEBLOCKS: Refer to page 136 in this catalog. RECOMMENDED UPGRADE: LENRK/LESRK. CROSS REFERENCE VOLTS EDISON BUSSMANN GOULD LITTELFUSE 250 NCLR KTN-R A2KR KLNR 600 SCLR KTS-R A6KR* KLSR* * Larger body size on blade type. 11
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<strong>NCLR</strong> <strong>CLASS</strong> <strong>RK1</strong> <strong>FAST</strong>-<strong>ACTING</strong> <strong>FUSES</strong><br />
<strong>SCLR</strong> <strong>CLASS</strong> <strong>RK1</strong> <strong>FAST</strong>-<strong>ACTING</strong> <strong>FUSES</strong><br />
Catalog Number <strong>NCLR</strong> (1 - 600A) 250 Volts AC or Less<br />
Catalog Number <strong>SCLR</strong> (1 - 600A) 600 Volts AC or Less<br />
AMPERE RATINGS<br />
<strong>NCLR</strong> 250V<br />
1 10 35 80 175 400<br />
3 12 40 90 200 450<br />
4 15 45 100 225 500<br />
5 20 50 110 250 600<br />
6 25 60 125 300 —<br />
8 30 70 150 350 —<br />
<strong>SCLR</strong> 600V<br />
1 8 30 70 150 350<br />
2 10 35 80 175 400<br />
3 12 40 90 200 450<br />
4 15 45 100 225 500<br />
5 20 50 110 250 600<br />
6 25 60 125 300 —<br />
<strong>NCLR</strong>/<strong>SCLR</strong> SPECIFICATIONS<br />
Fast-Acting<br />
Voltage Rating:<br />
Ampere Rating:<br />
Interrupting Rating:<br />
Current Limiting:<br />
<strong>NCLR</strong> - 250VAC, <strong>SCLR</strong> - 600VAC<br />
1 - 600 Amps<br />
200,000 RMS Symmetrical Amps<br />
<strong>RK1</strong> Fuse<br />
Agency Approvals:<br />
UL Listed, Class <strong>RK1</strong>, Guide JDDZ, File E162363<br />
CSA Certified HRCI-R per C22.2, No. 248.12<br />
Self-Certified DC Ratings:<br />
Voltage Rating: <strong>NCLR</strong> (1-600) 250VDC<br />
<strong>SCLR</strong> (1-600) 300VDC<br />
Interrupting Rating: <strong>NCLR</strong>/<strong>SCLR</strong> 10,000 Amperes DC<br />
BENEFITS:<br />
• No intentional time-delay; opens quickly on overload current.<br />
• Extremely current limiting silver link construction; provides<br />
superior component circuit protection.<br />
APPLICATIONS:<br />
• Recommended for protection on non-inductive loads such<br />
as lighting and resistance heating circuits.<br />
• Use to protect lower interrupting rating circuit breakers in<br />
series rated applications.<br />
RECOMMENDED FUSEBLOCKS:<br />
Refer to page 136 in this catalog.<br />
RECOMMENDED UPGRADE:<br />
LENRK/LESRK.<br />
CROSS REFERENCE<br />
VOLTS EDISON BUSSMANN GOULD LITTELFUSE<br />
250 <strong>NCLR</strong> KTN-R A2KR KLNR<br />
600 <strong>SCLR</strong> KTS-R A6KR* KLSR*<br />
* Larger body size on blade type.<br />
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<strong>NCLR</strong> <strong>CLASS</strong> <strong>RK1</strong> <strong>FAST</strong>-<strong>ACTING</strong> <strong>FUSES</strong><br />
<strong>SCLR</strong> <strong>CLASS</strong> RK 1 <strong>FAST</strong>-<strong>ACTING</strong> <strong>FUSES</strong><br />
Application:<br />
Edison <strong>NCLR</strong>/<strong>SCLR</strong> Class <strong>RK1</strong> fast acting fuses are recommended<br />
for general power distribution system use for main,<br />
feeder and branch circuits having a high percentage of noninductive<br />
loads such as heating and lighting. <strong>NCLR</strong>/<strong>SCLR</strong><br />
fuses are suitable for circuit breaker protection.* When<br />
<strong>NCLR</strong>/<strong>SCLR</strong> fast acting fuses are used for inductive loads,<br />
the fuses usually require oversizing to override normal transient<br />
current surges of motors and transformers. Oversizing<br />
fuses usually increases fuse and equipment cost and<br />
reduces overcurrent protection. (For inductive loads,<br />
LENRK/LESRK fuses are recommended). <strong>NCLR</strong>/<strong>SCLR</strong><br />
Class <strong>RK1</strong> fast acting fuses are physically interchangeable<br />
with other Class R fuses. They will replace Class K or Class<br />
H fuses in standard fuse clips.<br />
*When used as recommended by a specific circuit breaker manufacturer for a<br />
specific application.<br />
AVERAGE TIME/CURRENT CURVE<br />
Cat. No. <strong>NCLR</strong> (Amp) 250V and <strong>SCLR</strong> (Amp) 600V<br />
300<br />
30A<br />
60A<br />
100A<br />
200A<br />
200<br />
100<br />
80<br />
60<br />
40<br />
30<br />
20<br />
10<br />
8<br />
6<br />
4<br />
TIME IN SECONDS<br />
3<br />
2<br />
1<br />
.8<br />
.6<br />
.4<br />
.3<br />
.2<br />
.1<br />
.08<br />
.06<br />
.04<br />
.03<br />
.02<br />
.01<br />
40<br />
60<br />
80<br />
100<br />
200<br />
300<br />
400<br />
600<br />
800<br />
1,000<br />
2,000<br />
3,000<br />
4,000<br />
6,000<br />
8,000<br />
10,000<br />
400A<br />
600A<br />
AMPERE<br />
RATING<br />
RMS SYMMETRICAL CURRENT IN AMPERES<br />
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PEAK LET-THROUGH CURRENT CURVES*<br />
<strong>NCLR</strong> <strong>CLASS</strong> <strong>RK1</strong> <strong>FAST</strong>-<strong>ACTING</strong> <strong>FUSES</strong><br />
<strong>SCLR</strong> <strong>CLASS</strong> <strong>RK1</strong> <strong>FAST</strong>-<strong>ACTING</strong> <strong>FUSES</strong><br />
<strong>NCLR</strong> (250V)<br />
<strong>SCLR</strong> (600V)<br />
400,000<br />
B<br />
400,000<br />
B<br />
300,000<br />
300,000<br />
INSTANTANEOUS PEAK LET-THRU CURRENT IN AMPS<br />
200,000<br />
100,000<br />
80,000<br />
60,000<br />
50,000<br />
40,000<br />
30,000<br />
20,000<br />
10,000<br />
8,000<br />
6,000<br />
5,000<br />
4,000<br />
3,000<br />
A<br />
2,000<br />
AMPERE<br />
RATING<br />
600<br />
400<br />
200<br />
100<br />
60<br />
30<br />
INSTANTANEOUS PEAK LET-THRU CURRENT IN AMPS<br />
200,000<br />
100,000<br />
80,000<br />
60,000<br />
50,000<br />
40,000<br />
30,000<br />
20,000<br />
10,000<br />
8,000<br />
6,000<br />
5,000<br />
4,000<br />
3,000<br />
A<br />
2,000<br />
AMPERE<br />
RATING<br />
600<br />
400<br />
200<br />
100<br />
60<br />
30<br />
1,000<br />
1,000<br />
2,000<br />
3,000<br />
4,000<br />
5,000<br />
6,000<br />
8,000<br />
10,000<br />
20,000<br />
30,000<br />
40,000<br />
50,000<br />
60,000<br />
80,000<br />
100,000<br />
RMS SYMMETRICAL CURRENTS IN AMPERES<br />
A–B=ASYMMETRICAL AVAILABLE PEAK (2.3 X SYMM RMS AMPS)<br />
200,000<br />
1,000<br />
1,000<br />
2,000<br />
3,000<br />
4,000<br />
5,000<br />
6,000<br />
8,000<br />
10,000<br />
20,000<br />
30,000<br />
40,000<br />
50,000<br />
60,000<br />
80,000<br />
100,000<br />
RMS SYMMETRICAL CURRENTS IN AMPERES<br />
A–B=ASYMMETRICAL AVAILABLE PEAK (2.3 X SYMM RMS AMPS)<br />
200,000<br />
*Curves test data obtained at 15% short-circuit power factor when possible.<br />
CURRENT LIMITATION TABLES**<br />
<strong>NCLR</strong> (250V)<br />
<strong>NCLR</strong> – RMS & Peak Let-Thru Currents (kA)<br />
Prosp. Fuse Size<br />
Short 30 60 100 200 400 600<br />
C.C. I RMS I p I RMS I p I RMS I p I RMS I p I RMS I p I RMS I p<br />
5,000 1 2 1 3 2 4 3 6 5 10 5 12<br />
10,000 1 2 1 3 2 5 3 8 6 14 8 19<br />
15,000 1 3 2 4 2 6 4 9 7 17 10 22<br />
20,000 1 3 2 4 3 6 4 10 8 19 11 25<br />
25,000 1 3 2 5 3 7 4 10 9 20 12 27<br />
30,000 1 3 2 5 3 7 5 11 10 22 13 29<br />
35,000 1 3 2 5 3 8 5 12 10 23 13 31<br />
40,000 1 3 2 5 3 8 5 12 10 24 14 32<br />
50,000 2 4 2 5 4 9 6 13 11 26 15 36<br />
60,000 2 4 2 6 4 9 6 14 12 28 17 38<br />
70,000 2 4 3 6 4 9 6 15 13 29 17 40<br />
80,000 2 4 3 6 4 10 7 15 13 30 18 42<br />
90,000 2 4 3 6 5 10 7 16 13 31 19 44<br />
100,000 2 4 3 7 5 11 7 17 14 32 20 46<br />
150,000 2 5 3 7 5 13 8 19 16 37 23 53<br />
200,000 2 5 3 8 6 14 9 21 18 41 26 59<br />
<strong>SCLR</strong> (600V)<br />
<strong>SCLR</strong> – RMS & Peak Let-Thru Currents (kA)<br />
Prosp. Fuse Size<br />
Short 30 60 100 200 400 600<br />
C.C. I RMS I p I RMS I p I RMS I p I RMS I p I RMS I p I RMS I p<br />
5,000 1 2 1 3 2 4 3 6 5 12 5 12<br />
10,000 1 2 2 4 2 5 4 8 7 15 9 20<br />
15,000 1 3 2 4 3 6 4 10 8 18 11 24<br />
20,000 1 3 2 5 3 7 5 11 9 20 12 28<br />
25,000 1 3 2 5 3 7 5 12 10 22 13 31<br />
30,000 1 3 2 5 3 8 5 13 10 24 14 33<br />
35,000 2 4 2 5 4 8 6 13 11 25 15 35<br />
40,000 2 4 2 6 4 9 6 14 11 26 16 37<br />
50,000 2 4 3 6 4 9 6 14 12 28 17 40<br />
60,000 2 4 3 6 4 10 7 15 13 30 19 43<br />
70,000 2 4 3 7 5 10 7 16 14 32 20 45<br />
80,000 2 4 3 7 5 11 7 17 14 33 21 48<br />
90,000 2 5 3 7 5 12 8 18 15 35 22 50<br />
100,000 2 5 3 7 5 12 8 19 16 36 23 52<br />
150,000 2 5 4 8 6 14 9 21 18 41 26 60<br />
200,000 3 6 4 9 7 15 10 23 20 46 29 66<br />
*"Apparent Let-Thru Amperes" values are read from "Peak Let-Through Current Curves" and the peak current value divided by 2.3<br />
Asymmetry Factor.<br />
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