General Purpose Fuses
RLN/RLS Class H Fuses
250/600 VAC • Renewable • 1 – 600 Amperes
and increasing automation, which makes downtime very expensive,
have greatly reduced or eliminated the cost savings attributed to
renewable fuses.
We recommend the use of POWR-PRO
®
FLSR_ID series Indicator
®
fuses for circuits between 250 and 600 volts and FLNR_ID series for
circuits 250 volts and below. Complete information on POWR-PRO
Indicator fuses may be found in the POWR-PRO fuse section of this
catalog. FLNR fuses are in this section of the catalog.
General Purpose Fuses
Cost Considerations
• When comparing the cost of using renewable fuses with the cost of
other fuses, the labor required for replacing links and the cost of addi-
tional downtime should be included.
Cautions
• Renewable fuses should only be used where short-circuit currents
are known to be less than 10,000 amperes, and where correct
replacement of open links is assured.
• After disassembly of fuse, examine carefully. Discard any fuses
which show evidence of weakened tube or damaged components.
• Remove all link residue from fuse tube.
• Carefully clean all contact surfaces, and remove metal spatter from
all surfaces.
• Install the proper rated fuse link and tighten all connections
securely.
• Visually examine fuses for correct alignment of blades.
Littelfuse RLN/RLS series renewable fuses are a quality product that
have traditionally been used to provide low cost protection of general
purpose feeder and branch circuits where available short-circuit currents
do not exceed 10,000 amperes. However, increased levels of available
fault current and the possibility that renewable fuses may be improperly
renewed is a potential safety hazard. In addition, escalating labor costs
Dimensions
• For dimensions, please refer to NLN series for RLN dimensions and
NLS series for RLS dimensions.
Specifications
Voltage Ratings:
Interrupting Ratings:
Ampere Range:
Approvals:
AC: 250 Volts (RLN); 600 Volts (RLS)
AC: 10,000 amperes rms symmetrical
1 – 600 amperes
Standard 248-6, Class H
UL Listed (File No: E81895)
CSA Certified (File No: LR29862)
To order, specify LKN (250V) or LKS (600V) plus
ampere rating.
Ampere Ratings
1
2
3
4
5
6
8**
10
12**
15
20
25
30
35
40
45
50
60
70
80
90
100
110
125
150
175
200
225*
250*
300*
350*
400*
450*
500*
600*
FUSE LINKS:
*These ampere ratings require two links per fuse.
**RLS Only.
Example part number (series & amperage): RLN 20
Recommended Fuse Blocks
LH250 series (for RLN series fuses)
LH600 series (for RLS series fuses)
Refer to the Blocks & Holders section of this catalog for additional information.
38
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© 2005 Littelfuse
•
POWR-GARD
™
Products Catalog
