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JLLN1

更新时间： 2024-11-27 00:00:19
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Fuse

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JLLN1 数据手册

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JLLN/JLLS POWR-T™ Class T Fuses  
ꢀ
ꢀ
300/600 VAC Fast-Acting 1 – 1200 Amperes  
SPECIFICATIONS  
Voltage ratings: AC: 300 Volts (JLLN); 600 Volts (JLLS)  
DC: 125 Volts (JLLN 110 – 1200A);  
300 Volts (JLLS)  
Interrupting ratings:AC: 200,000 amperes rms symmetrical  
DC: 20,000 amperes (JLLN 110 – 1200A)  
(JLLS 1 – 1200A)  
GENERAL  
PURPOSE  
FUSES  
Ampere range: 1– 1200 amperes  
Approvals: AC: UL Listed Class T per UL 248  
(formerly UL 198H)  
(File No. E81895): JLLN/JLLS (1 – 800A)  
UL Recognized (  
) (File No. E71611):  
JLLS (900 – 1200A)  
CSA Certified HRCI-T (File No. LR29862):  
JLLN/JLLS (1 – 600A)  
DC: Additionally UL Listed per UL 198L:  
JLLN (110 – 1200A) (File No. E81895)  
JLLS 300 VDC is Littelfuse self-certified  
AMPERE RATINGS  
1
2
3
6
10  
15  
20  
25  
30  
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40  
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50  
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80  
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1100  
1200  
*
JLLS only.  
*
Example part number (series & amperage): JLLS 100  
RECOMMENDED FUSE BLOCKS  
LT300 series (for JLLN series fuses)  
LT600 series (for JLLS series fuses)  
Space saving POWR-T™ fuses are the most compact fuses  
available in ratings above 30 amperes — less than one-third  
the size of comparable Class R fuses. When rated in accor-  
dance with the NEC, POWR-T fuses provide fast-acting  
overload and short circuit protection for non-inductive circuits  
and equipment. Used in inductive circuits, the ampere rating  
of POWR-T fuses must be increased to prevent opening on  
inrush currents. In such instances, POWR-T fuses may  
provide only short circuit protection.  
Refer to Fuse Block section of this catalog for additional infor-  
mation.  
ꢀ
Extremely current limiting — Stops damaging short circuit  
current faster than any mechanical protective device.  
ꢀ
Fast-acting — Provides fast-acting overload protection to  
equipment such as variable speed drives, rectifiers and  
other equipment containing surge-sensitive components.  
For motor and general purpose circuits where space is not  
critical, we recommend POWR-PRO® JTD_ID Indicator  
series, LLNRK/LLSRK series, or FLSR_ID Indicator series.  
LONGER EQUIPMENT LIFE  
APPLICATIONS  
ꢀ
Current limiting design greatly reduces damage to equip-  
ment caused by heating and magnetic effects of short  
circuit currents.  
Protection of individual electric services and meters.  
Main switches containing Class T fuses may be used to  
provide compact protection for meter stacks.  
ECONOMICAL  
Molded case circuit breaker load centers and panelboards  
have increased interrupting ratings when “series rated” with  
Littelfuse Class T fuses. Refer to panelboard manufacturers’  
literature for UL Listed combination of fuses and panelboards.  
Series ratings up to 200,000 amperes are available.  
ꢀ
Extremely current limiting design often permits use of  
readily available, less costly equipment.  
ꢀ
Used as input or output fuses for surge-sensitive compo-  
nents, such as variable speed drives and rectifiers, fast-  
acting POWR-T JLLN/JLLS fuses may prevent opening of  
expensive semiconductor fuses protecting individual  
components.  
SPACE-SAVING  
Typical three-pole Class T fuse blocks require less than 50%  
of the panel area required for Class R fuse blocks. Switch  
enclosures, fuse pullouts, and other equipment using Class T  
fuses are often correspondingly more compact.  
NOTE: JLLN Class T 300 volt fuses are UL listed for circuits  
not exceeding 300 volts to ground. However, since UL does  
not include testing 300 volt Class T fuses on 277/480 volt  
three-phase bolted faults, Littelfuse does not recommend  
using 300 volt Class T fuses where phase-to-phase voltage  
exceeds 300 volts.  
SAFETY  
ꢀ
200,000 A.I.R. — Reliable interruption of all overcurrents up  
to 200,000 amperes.  
39  
123

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