60032R2B5.5 Datasheet, PDF (4/10 Pages) Littelfuse – MEDIUM VOLTAGE FUSES

POWR-GARD^® Fuse Datasheet
E-RATED MEDIUM VOLTAGE FUSES
Description
E-rated fuses have time current characteristics designed to
provide current-limiting protection for power transformers,
potential transformers, power centers, feeder centers, and
unit sub stations. When properly applied, they can protect
against high and low fault currents.
NEMA Standards for E-rated medium voltage fuses require
that fuses rated 100E or less open within 300 seconds
(5 minutes) when subjected to an RMS value of 200-240%
of the fuse continuous current rating; and fuses with an
E rating larger than 100E must open within 600 seconds
(10 minutes) when subjected to an RMS current of 220-
240% of the fuse’s continuous current rating. These values
establish one point on the time-current curve.
Application Note
Since these fuses are used for the protection of general
­purpose circuits which may contain transformers, motors,
and other equipment producing in-rush and/or overload
currents, fuses should generally be rated at 140% of the
­normal full load current, and circuits should be analyzed
to ensure that system load currents will not exceed the
current rating of the fuse.
Characteristics
Voltage Ratings 2,750 V – 38,000 V
Current Range 10E – 600E
Options
• Hermetically sealed for use in hazardous locations 
(add “S” suffix to part number)
• Clip-lock (CL) available.
Dimensions
3"DIA
6.38"
9.75"
Dim.A
Clip
Center
Dim.B
Figu_Dre 4
Fig_Du_Dre 5
F_Dig_Dur_De 6
E-RATED
ORDERING/CATALOG
NUMBER
SIZE
10E1C2.75
10E
15E1C2.75
15E
20E1C2.75
20E
25E1C2.75
25E
30E1C2.75
30E
40E1C2.75
40E
50E1C2.75
50E
65E1C2.75
65E
80E1C2.75
80E
100E-1C2.75
100E
125E1C2.75
125E
150E1C2.75
150E
200E1C2.75
200E
125E2C2.75
125E
150E2C2.75
150E
200E2C2.75
200E
250E2C2.75
250E
300E2C2.75
300E
350E2C2.75
350E
400E2C2.75
400E
450E2C2.75
450E
* RMS Asymmetrical amperes = RMS Symmetrical amperes x 1.6
DIM. A (INCHES)
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
DIM. B (INCHES)
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
MAX INTE^ARRUPTING
RATING RMS (ASYM)*
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
FIGURE
NUMBER
4
4
4
4
4
4
4
4
4
4
4
4
4
5
5
5
5
5
5
5
5
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Rev: 063014