AMP-TRAP
®
BOLT-In SERIES
E-RATED/MEDIUM
VOLTAGE FUSES
5kV BOLT-In FUSES
Amp-trap
®
Bolt-in Series E-rated fuses are single,
double or triple barrel (3” diam.) with end mounts
designed for bolting directly to equipment bus or
terminal pads. They are UL listed and are for use
indoors (or outdoors in a weatherproof enclosure).
The unique time-current characteristic of Ferraz
Shawmut E-rated fuses allows them to be closely
sized to transformer full load rated current, as
recommended by IEEE guidelines, without being
affected by normal magnetizing inrush current.
Bolt-in fuses are typically sized at transformer
rated current of 133%, thereby providing superior
overall protection.
Features/Benefits
➤
UL Listed
for compatibility with UL listed equipment
➤
Bolt-in mounting
for direct connection to bus or
terminals
➤
Current Limiting
for superior equipment protection
➤
Blown-fuse indicator
gives positive identification
of open fuse
➤
non-venting
for silent operation
➤
Metal Embossed Catalog number
and manufacturing
date for lasting identification
HIGHLIGHTS:
➤
E-Rated
➤
UL Listed
➤
Complies with
ANSI C37.46
APPLICATIOnS:
➤
Protection for 5.5kV
transformers or distri-
bution systems
Ratings
➤
A055B
AC:
10E TO 900E
5500V max, 63kA I.R.
Sym.
Approvals
➤
UL Listed to JEEG,
“Fuses Over 600 Volts”
UL File # E143362
DEFInITIOnS:
E-rating
E-rated fuses operate as follows:
Over 100E - must melt in 600 seconds (10 mins.)
on 220 to 264% of E (ampere) rating.
Example - A 750E fuse must melt in 600 seconds with an
applied current of 1650 to 1980 amperes.
General Purpose Current-Limiting Fuse
A general purpose current-limiting power fuse is one that is
capable of interrupting all currents from its rated interrupting
rating down to the current that causes melting of the fusible
element in one hour.
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AMP-TRAP
®
BOLT-In SERIES
Figure A
E-RATED/MEDIUM
VOLTAGE FUSES
Figure B
Catalog Numbering System
A
R 0 - 50 E
Ampere Rating
Revision/No.
Special Features
Diameter (D=3”)
No. of Barrels
Style (B= Bolt-in Mount)
Max. Voltage Rating (055=5.5kV)
Amp-trap Fuse
0 5 5
B
1
D
A
E
Figure C
CATALOG NUMBER
AMPERE
RATING
10E
15E
20E
25E
30E
40E
50E
65E
80E
100E
125E
150E
175E
200E
250E
300E
350E
400E
450E
450E
500E
600E
NUMBER
OF BARRELS
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
FIG.
INTERRUPTING RATING
RMS SYM. AMPERES*
5.5kV MAX. BOLT-IN STYLE - 17.88 (454 mm) HOLE CENTER - 3” (76.2 mm) BARREL DIAMETER
A055B1DARO-10E
A055B1DARO-15E
A055B1DARO-20E
A055B1DARO-25E
A055B1DARO-30E
A055B1DARO-40E
A055B1DARO-50E
A055B1DARO-65E
A055B1DARO-80E
A055B1DARO-100E
A055B1DARO-125E
A055B1DARO-150E
A055B1DARO-175E
A055B1DARO-200E
A055B2DARO-250E
A055B2DARO-300E
A055B2DARO-350E
A055B2DARO-400E
A055B2DARO-450E
A055B2DORO-450E
A055B2DORO-500E
A055B2DORO-600E
*
RMS ASYM. AMPS = RMS SYM. AMPERES x 1.6
A
A
A
A
A
A
A
A
A
A
A
A
A
A
B
B
B
B
B
C
C
C
63,000
5.5kV
MAX. BOLT-IN STYLE - 17.88 (454 mm) HOLE CENTER - 3” (76.2 mm) BARREL DIAMETER
63,000
5.5kV
MAX. BOLT-IN STYLE - 23.73 (602.7 mm) HOLE CENTER - 3” (76.2 mm) BARREL DIAMETER
63,000
E 1
AMP-TRAP
®
BOLT-In SERIES
E-RATED/MEDIUM
VOLTAGE FUSES
A055B1DARO - 10E to 200E - A055B2DARO - 250E to 450E
Peak Let-Thru Current Data, E-Rated Fuses
Maximum Instantaneous Peak Let-Thru Amperes
Available Current in RMS Symmetrical Amperes
A055B2D0RO - 450E to 600E
Peak Let-Thru Current Data, E-Rated Fuses
Maximum Instantaneous Peak Let-Thru Amperes
Available Current in RMS Symmetrical Amperes
E 1
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