POWR-GARD® Fuses—MediumVoltage
E-RATED MEDIUM VOLTAGE FUSES
Current-Limiting
Description
Characteristics
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.
Voltage Ratings:
Current Range:
2,750 V – 38,000 V
10E – 600E
Options
•ꢀ Hermetically sealed for use in hazardous locations
NEMA Standards for E-rated medium voltage fuses require that
fuses rated 100E or less open within 300 seconds
(add “S” suffix to part number)
•ꢀ Clip-lock (CL) and bolt-in styles available.
(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.
Dimensions
6.38"
9.75"
3"DIA
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
Dim.A
Clip
Center
Dim.B
to ensure that system load currents will not exceed the current
rating of the fuse.
Figure 4
Figure 5
Figure 6
SySTEM/CATALOG
MAx INTERRUPTING
RATING RMS (ASyM)
FIGURE
NUMBER
E
SIzE
DIM. A (INChES) DIM. B (INChES)
NUMBER
RATED
10E1C2.75
15E1C2.75
10E
15E
20E
25E
30E
40E
50E
65E
80E
100E
125E
150E
200E
125E
150E
200E
225E
250E
300E
350E
400E
450E
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
7"
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"
10.875"
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
80,000
4
4
4
4
4
4
4
4
4
4
4
4
4
5
5
5
5
5
5
5
5
5
20E1C2.75
25E1C2.75
30E1C2.75
40E1C2.75
50E1C2.75
65E1C2.75
80E1C2.75
100E-1C2.75
125E1C2.75
150E1C2.75
200E1C2.75
125E2C2.75
150E2C2.75
200E2C2.75
225E2C2.75
250E2C2.75
300E2C2.75
350E2C2.75
400E2C2.75
450E2C2.75
4
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© JUNE 2011 Littelfuse POWR-GARD Products
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