67
E Rated Medium Voltage Fuses
Current Limiting
“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 value 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’s 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 inrush and/or overload cur-
rents, 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 Rating: 2,400 volts – 38,000 volts
Current Range: 10E – 600E
OPTIONS
■Hermetically Sealed for use in hazardous locations
(add “S” suffix to part number)
■Clip-lock (CL) and bolt-in styles available.
3"DIA
Dim.A
(Clip
Center)
6.38"
Dim.B
9.75"
Catalog
Number
10E-1C-2.75
15E-1C-2.75
20E-1C-2.75
25E-1C-2.75
30E-1C-2.75
40E-1C-2.75
50E-1C-2.75
65E-1C-2.75
80E-1C-2.75
100E-1C-2.75
125E-1C-2.75
150E-1C-2.75
200E-1C-2.75
125E-2C-2.75
150E-2C-2.75
175E-2C-2.75
200E-2C-2.75
225E-2C-2.75
250E-2C-2.75
300E-2C-2.75
350E-2C-2.75
400E-2C-2.75
450E-2C-2.75
Old
Catalog
Number
LCX 10E
—
—
—
LCX 30E
LCX 40E
LCX 50E
LCX 65E
LCX 80E
LCX 100E
—
—
—
LCX 125E
LCX 150E
LCX 175E
LCX 200E
LCX 250E
LCX 300E
LCX 400E
—
Size
10E
15E
20E
25E
30E
40E
50E
65E
80E
100E
125E
150E
200E
125E
150E
175E
200E
225E
250E
300E
350E
400E
450E
Dim. A
(inches)
7"
7"
Dim. B
(inches)
10.875"
10.875"
Max
Interrupting
Rating
RMS (Asym)
80,000
80,000
Figure
Number
14
14
14
14
14
14
14
14
14
14
14
14
14
15
15
15
15
15
15
15
15
15
15
E
RATED
2.75 Max. KV
FIGURE 14 FIGURE 15 FIGURE 16
68
E Rated Medium Voltage Fuses
Current Limiting
Catalog
Number
10E-1C-5.5
15E-1C-5.5
20E-1C-5.5
25E-1C-5.5
30E-1C-5.5
40E-1C-5.5
50E-1C-5.5
65E-1C-5.5
80E-1C-5.5
100E-1C-5.5
125E-1C-5.5
150E-1C-5.5
175E-1C-5.5
200E-1C-5.5
125E-2C-5.5
150E-2C-5.5
175E-2C-5.5
200E-2C-5.5
250E-2C-5.5
300E-2C-5.5
350E-2C-5.5
400E-2C-5.5
450E-2C-5.5
500E-3C-5.5
550E-3C-5.5
600E-3C-5.5
Old
Catalog
Number
—
—
—
—
LCY 30E
LCY 40E
LCY 50E
LCY 60E
LCY 80E
LCY 100E
LCY 125E
LCY 150E
LCY 175E
LCY 200E
—
—
—
—
LCY 250E
LCY 300E
LCY 350E
LCY 400E
LCY 450E
—
—
—
Size
10E
15E
20E
25E
30E
40E
50E
65E
80E
100E
125E
150E
175E
200E
125E
150E
175E
200E
250E
300E
350E
400E
450E
500E
550E
660E
Dim. A
(inches)
12"
12"
12"
Dim. B
(inches)
15.875"
15.875"
15.875"
Max
Interrupting
Rating
RMS (Asym)
80,000
80,000
80,000
Diagram
14
14
14
14
14
14
14
14
14
14
14
14
14
14
15
15
15
15
15
15
15
15
15
16
16
16
E
RATED
5.5 Max. KV
5.5 Max. KV
5NLE-10E
5NLE-15E
5NLE-20E
5NLE-25E
5NLE-30E
5NLE-40E
5NLE-50E
5NLE-65E
5NLE-80E
5NLE-100E
5NLE-125E
5NLE-150E
5NLE-175E
5NLE-200E
5NLE2-225E
5NLE2-250E
5NLE2-300E
5NLE2-350E
5NLE2-400E
5NLE2-450E
LCU 30E
LCU 40E
LCU 50E
LCU 65E
LCU 80E
LCU 100E
LCU 125E
LCU 150E
LCU 175E
LCU 200E
LCU 250E
LCU 300E
LCU 350E
LCU 400E
LCU 450E
10E
15E
20E
25E
30E
40E
50E
65E
80E
100E
125E
150E
175E
200E
225E
250E
300E
350E
400E
450E
17-7/8"
17-7/8"
80,000
80,000
14
14
14
14
14
14
14
14
14
14
14
14
14
14
15
15
15
15
15
15
14
14"
69
E Rated Medium Voltage Fuses
Current Limiting
8.25 Max. KV
8NLE-10E
8NLE-15E
8NLE-20E
8NLE-25E
8NLE-30E
8NLE-40E
8NLE-50E
8NLE-65E
8NLE-80E
8NLE-100E
8NLE2-100E
8NLE2-125E
8NLE2-150E
8NLE2-200E
8NLE2-250E
LCZ 30E
LCZ 40E
LCZ 50E
LCZ 65E
LCZ 80E
LCZ 100E
LCZ 100E
LCZ 125E
LCZ 150E
LCZ 200E
10E
15E
20E
25E
30E
40E
50E
65E
80E
100E
100E
125E
150E
200E
250E
17-7/8"
17-7/8"
80,000
80,000
14
14
14
14
14
14
14
14
14
14
15
15
15
15
15
14"
14"
Catalog
Number
10E-1C-8.25
15E-1C-8.25
20E-1C-8.25
25E-1C-8.25
30E-1C-8.25
40E-1C-8.25
50E-1C-8.25
65E-1C-8.25
80E-1C-8.25
100E-1C-8.25
125E-1C-8.25
150E-1C-8.25
125E-2C-8.25
150E-2C-8.25
200E-2C-8.25
250E-2C-8.25
300E-2C-8.25
350E-3C-8.25
400E-3C-8.25
Old
Catalog
Number
LDZ 30E
LDZ 40E
LDZ 50E
LDZ 65E
LDZ 80E
LDZ 100E
LDZ 125E
LDZ 150E
LDZ 125E
LDZ 150E
LDZ 200E
LDZ 250E
LDZ 300E
LDZ 350Z
Size
10E
15E
20E
25E
30E
40E
50E
65E
80E
100E
125E
150E
125E
150E
200E
250E
300E
350E
400E
Dim. A
(inches)
12"
12"
12"
Dim. B
(inches)
15-7/8"
15-7/8"
15-7/8"
Max
Interrupting
Rating
RMS (Asym)
80,000
80,000
80,000
Diagram
14
14
14
14
14
14
14
14
14
14
14
14
15
15
15
15
15
16
16
E
RATED
8.25 Max. KV
Catalog
Number
10E-1C-15.5
15E-1C-15.5
20E-1C-15.5
25E-1C-15.5
30E-1C-15.5
40E-1C-15.5
50E-1C-15.5
65E-1C-15.5
80E-1C-15.5
100E-1C-15.5
65E-2C-15.5
80E-2C-15.5
100E-2C-15.5
125E-2C-15.5
150E-2C-15.5
175E-2C-15.5
200E-2C-15.5
200E-3C-15.5
250E-3C-15.5
300E-3C-15.5
Old
Catalog
Number
LDN 10E
LDN 15E
LDN 20E
LDN 25E
LDN 30E
LDN 40E
LDN 50E
LDN 65E
LDN 80E
LDN 100E
LDN 150E
LDN 175E
Size
10E
15E
20E
25E
30E
40E
50E
65E
80E
100E
65E
80E
100E
125E
150E
175E
200E
200E
250E
300E
Dim. A
(inches)
15"
15"
15"
Dim. B
(inches)
18.875"
18.875"
18.875"
Max
Interrupting
Rating
RMS (Asym)
60,000
60,000
60,000
Figure
Number
14
14
14
14
14
14
14
14
14
14
15
15
15
15
15
15
15
16
16
16
E
RATED
15.5 Max. KV
70
15.5 Max. KV
15NLE-10E
15NLE-15E
15NLE-20E
15NLE-25E
15NLE-30E
15NLE-40E
15NLE-50E
15NLE-65E
15NLE-80E
15NLE-100E
15NLE2-80E
15NLE2-100E
15NLE2-125E
15NLE2-150E
15NLE2-175E
15NLE2-200E
15NLE3-150E
15NLE3-175E
15NLE3-250E
15NLE3-300E
LCN 30E
LCN 40E
LCN 50E
LCN 65E
LCN 80ES
LCN 100ES
LCN 80E
LCN 100E
LCN 125X
LCN 150E
LCN 200ED
—
10E
15E
20E
25E
30E
40E
50E
65E
80E
100E
80E
100E
125E
150E
175E
200E
150E
175E
250E
300E
23-7/8"
23-7/8"
23-7/8"
14
14
14
14
14
14
14
14
14
14
15
15
15
15
15
15
16
16
16
16
60,000
60,000
60,000
20"
20"
20"
Catalog
Number
15GSE-65E
15GSE-80E
15GSE-100E
15GSE2-125E
15GSE2-150E
15GSE2-175E
15GSE2-200E
Old
Catalog
Number
—
—
Size
65E
80E
100E
125E
150E
175E
200E
Dim. A
(inches)
18"
18"
Dim. B
(inches)
21-7/8"
21-7/8"
Max
Interrupting
Rating
RMS (Asym)
60,000
60,000
Figure
Number
14
14
14
15
15
15
15
E
RATED
15.5
Max. KV
Catalog
Number
3E-1C-38.0
7E-1C-38.0
10E-1C-38.0
15E-1C-38.0
20E-1C-38.0
25E-1C-38.0
30E-1C-38.0
40E-1C-38.0
50E-2C-38.0
65E-2C-38.0
80E-2C-38.0
Old
Catalog
Number
—
—
Size
3E
7E
10E
15E
20E
25E
30E
40E
50E
65E
80E
Dim. A
(inches)
27"
27"
Dim. B
(inches)
30-5/8"
30-5/8"
Max
Interrupting
Rating
RMS (Asym)
20,000
20,000
Figure
Number
14
14
14
14
14
14
14
14
15
15
15
E
RATED
38 Max. KV
Catalog
Number
15E-1C-25.8
20E-1C-25.8
25E-1C-25.8
30E-1C-25.8
40E-1C-25.8
50E-1C-25.8
65E-2C-25.8
80E-2C-25.8
100E-2C-25.8
Old
Catalog
Number
—
—
Size
15E
20E
25E
30E
40E
50E
65E
80E
100E
Dim. A
(inches)
21"
21"
Dim. B
(inches)
24-5/8"
24-5/8"
Max
Interrupting
Rating
RMS (Asym)
40,000
40,000
Figure
Number
14
14
14
14
14
14
15
15
15
E
RATED
25.8 Max. KV
E Rated Medium Voltage Fuses
Current Limiting
71
E Rated Medium Voltage Fuses
Current Limiting
Catalog
Number
10E-1CL-15.5
15E-1CL-15.5
20E-1CL-15.5
25E-1CL-15.5
30E-1CL-15.5
40E-1CL-15.5
50E-1CL-15.5
65E-1CL-15.5
80E-1CL-15.5
100E-1CL-15.5
125E-2CL-15.5
150E-3CL-15.5
175E-3CL-15.5
200E-3CL-15.5
225E-3CL-15.5
250E-3CL-15.5
300E-3CL-15.5
Catalog
Number
10E-1CL-5.5
15E-1CL-5.5
20E-1C-5.5
25E-1CL-5.5
30E-1CL-5.5
40E-1CL-5.5
50E-1CL-5.5
65E-1CL-5.5
80E-1CL-5.5
100E-1CL-5.5
125E-1CL-5.5
150E-1CL-5.5
225E-2CL-5.5
250E-2CL-5.5
300E-2CL-5.5
350E-2CL-5.5
400E-2CL-5.5
450E-2CL-5.5
500E-3CL-5.5
550E-3CL-5.5
600E-3CL-5.5
Catalog
Number
10E-1CL-8.25
15E-1CL-8.25
20E-1C-8.25
25E-1CL-8.25
30E-1CL-8.25
40E-1CL-8.25
50E-1CL-8.25
65E-1CL-8.25
80E-1CL-8.25
100E-1CL-8.25
125E-2CL-8.25
150E-2CL-8.25
175E-2CL-8.25
200E-2CL-8.25
225E-2CL-8.25
250E-2CL-8.25
300E-2CL-8.25
350E-3CL-8.25
4.75 7.94 11.56
1.25
AB
1.25
.25
3.0
Clip Lock Design
The clip lock type designs ensures a positive contact between
the fuse and the connection cam. The fuse’s clip lock tab slides
in between the clip casting and the cam to prevent the fuse from
slipping or blowing out of the holder. This positive contact
improves heat dissipation and allows fuses to run cooler.
Old
Catalog
Number
—
—
—
Size
10E
15E
20E
25E
30E
40E
50E
65E
80E
100E
125E
150E
175E
200E
225E
250E
300E
350E
Dim. A
(inches)
17.38"
17.38"
17.38"
Dim. B
(inches)
16.13"
16.13"
16.13"
Max
Interrupting
Rating
RMS (Asym)
80,000
80,000
80,000
Figure
Number
17
17
17
17
17
17
17
17
17
17
18
18
18
18
18
18
18
19
E
RATED
8.25 Max. KV
Clip Lock
Old
Catalog
Number
—
—
—
Size
10E
15E
20E
25E
30E
40E
50E
65E
80E
100E
125E
150E
225E
250E
300E
350E
400E
450E
500E
550E
600E
Dim. A
(inches)
16.38"
17.38"
17.38"
Dim. B
(inches)
15.13"
16.13"
16.13"
Max
Interrupting
Rating
RMS (Asym)
80,000
80,000
80,000
Figure
Number
17
17
17
17
17
17
17
17
17
17
17
17
18
18
18
18
18
18
19
19
19
E
RATED
5.5 Max. KV
Clip Lock
Old
Catalog
Number
—
—
—
—
Size
10E
15E
20E
25E
30E
40E
50E
65E
80E
100E
125
150E
175E
200E
225E
250E
300E
Dim. A
(inches)
19.8"
22.81"
22.81"
22.81"
Dim. B
(inches)
18.1"
21.13"
19.1"
19.1"
Max
Interrupting
Rating
RMS (Asym)
60,000
60,000
60,000
60,000
Figure
Number
17
17
17
17
17
17
17
17
17
17
18
19
19
19
19
19
19
E
RATED
15.5 Max. KV
Clip Lock
FIGURE 17 FIGURE 18 FIGURE 19
