7
— Medium voltage fuses
Introduction
Worldwide circuit protection solutions
Eaton is the world-leading supplier of Bussmann series medium
voltage fuses. Each product is backed by an efficient worldwide
distribution network with unrivaled service and technical support.
Eaton circuit protection solutions comply with major international
standards: ANSI, BS, DIN, IEC and UL.
E- and R-Rated fuses
In North America, current limiting fuses typically fall into the
category of E-Rated fuses and R-Rated fuses. Eaton also offers a
wide range of Bussmann series current limiting fuses designed to
BS, DIN and IEC standards.
E-Rated fuses are used to protect feeder circuits, power
transformers and potential transformers. E-Rated fuses have defined
current response times specified by ANSI C37
.46. E-Rated fuses
100 amps and below must melt in 300 seconds at an RMS current
within the range of 200 to 240 percent of the continuous current
rating. E-Rated fuses above 100 amps must melt in 600 seconds
at an RMS current within the range of 240 to 264 percent of the
continuous current rating of the fuse. Eaton offers a wide variety of
full range and general purpose E-Rated fuses from 2.4 to 38 kV.
R-Rated fuses are back-up fuses that provide short-circuit protection
for motor circuits. They are applied with medium voltage motor
starters which provide the overload protection for the circuit. R-Rated
fuses also have defined current response times specified by ANSI
C37
.46. R-Rated fuses will melt in a range of 15 to 35 seconds at a
current equal to 100 times the “R” rating. Bussmann series R-Rated
fuses for motor circuit protection are available in voltage ratings from
2.4 to 8.3 kV
Fuse types
Medium voltage fuses generally fit into two categories – expulsion
fuses and current limiting. The definitions per ANSI C37 are:
.40
Expulsion fuse:
A vented fuse in which the expulsion effect of the
gases produced by internal arcing, either alone or aided by other
mechanisms results in current interruption. Expulsion fuses will
limit the duration of an overcurrent event, but they will not limit the
magnitude of fault current.
Current-limiting fuse:
A fuse unit that, when in its current-
responsive element is melted by a current within the fuse’s
specified current-limiting range, abruptly introduces a high
resistance to reduce current magnitude and duration, resulting in
subsequent current interruption. A current limiting fuse will reduce
the magnitude a fault current as well as limit the duration of the
overcurrent event when operating in its current limiting range.
Eaton offers a broad range of current limiting fuses for protection of
feeders, transformers and motor circuits designed to ANSI, BS, DIN
and IEC standards.
Medium voltage current-limiting fuses
Current-limiting fuses are classified into three categories:
1.
Full range
– defined by ANSI C37 as “a fuse capable of
.40
interrupting all currents from the maximum rated interrupting
current down to the minimum continuous current that causes the
melting of the fusible element(s), when the fuse is applied at the
maximum ambient temperature specified by the manufacturer. It
”
is able to interrupt any current that will melt its element.
2.
General purpose
– defined by ANSI C37 as “a fuse capable
.40
of interrupting all currents from the maximum rated interrupting
current down to the current that causes melting of the fusible
element(s) in one hour. Not all currents fall within this range. It is
”
possible for the fuse to be exposed to an overcurrent lower than
the value given by the one hour criteria. In that case, a different
overcurrent protection device would be required to interrupt the
overcurrent.
3.
Back-up
– defined by ANSI C37 as “a fuse capable of
.40
interrupting all currents from the maximum interrupting rating
current down to the minimum interrupting current. The minimum
”
interrupting current is the lowest current that the fuse will be
able to clear properly. This creates a need to place a low current
interrupting device, such as motor overloads, in series with the
back-up rated fuse.
7-2
BUSSMANN SERIES FULL LINE CATALOG 1007 — JUNE 2017
Eaton.com/bussmannseries
Medium voltage fuses —
7
5.5 kV E-Rated medium voltage ferrule fuses
Catalog symbols
•
Dimensions — in (mm)
C
B
General purpose
•
•
•
•
5CLE-_E-D (10-25 A)
5CLE-_E (10-1350 A)
5HLE-_E (10-450 A)
JCY-_E (1-25 A)
MV055F_ (10-450 A)
•
Full range (per ANSI C37
.40)
•
3.31
(84.1)
B
A
Ratings*
•
•
•
Volts 5.5 kV
Amps 1 to 1350 A
Interrupting ratings 40 to 63 kA RMS Sym.
* See catalog number tables for voltages, ampacities and interrupting ratings by
catalog number.
Agency information
•
E-Rated fuses meet the performance characteristics of ANSI
C37
.46
UL Listed, Guide JEEG, File E240398. See catalog numbers.
•
Recommended CLE and HLE fuseclips and holders
Approx. Dimensions — in (mm)
Diameter Clip center
A
B
Length C
Catalog no.
Mounting*
Porcelain
insulator
5CLE-PNM-D
5CLE-PDM-D
5CLE-PNM-C
5CLE-PDM-C
5CLE-PNM-E
5CLE-PDM-E
—
Amps
CLE
10E-D–25E-D
30E–250E
Single barrel
15E–25E
Single barrel
300E–450E
Double barrel
Fuse mounting
type
Non-disconnect
Disconnect
†
Non-disconnect
Disconnect
†
Non-disconnect
Disconnect
†
BIL
(kV)
Glass-polyester
insulator
5CLE-GNM-D
5CLE-GDM-D
5CLE-GNM-C
5CLE-GDM-C
5CLE-GNM-E
5CLE-GDM-E
—
Live parts
(with end
fittings)
CLE-NL-D
CLE-DL-D
CLE-NL-C
CLE-DL-C
CLE-NL-E
CLE-DL-E
—
End fittings
(disconnect
only)
—
CLE-DF-D
—
CLE-DF-C
—
CLE-DF-E
—
Medium voltage
fuses
3.0 (76.2)
2.0 (50.8)
3.0 (76.2)
14.0 (355.6) 17 (454.7)
.9
11.5 (292.1)
12.9 (327
.7)
60
14.0 (355.6) 17 (454.7)
.9
600E and 750E Consult factory
Double barrel
1100E and
1350E
Consult factory
Four barrel
HLE
Non-disconnect
10E-D–250E
Single barrel
Disconnect
Non-disconnect
300E–450E
Double barrel
Disconnect
4.0 (101.6) N/A
—
N/A
60
3.0 (76.2)
5HLE-PNM-D
5HLE-PDM-D
12.0 (304.8) 15.9 (403.9)
5HLE-PNM-E
5HLE-PDM-E
5HLE-GNM-D
5HLE-GDM-D
5HLE-GNM-E
5HLE-GDM-E
CLE-NL-D
CLE-DL-D
CLE-NL-E
CLE-DL-E
—
CLE-DF-D
—
CLE-DF-E
* Including live parts and end fittings, end fittings supplied only when required.
† Disconnect mountings provide a means for fuse extraction only. Do not use a
disconnect mounting for load switching or fuse removal while energized.
Data sheet no. 10351
BUSSMANN SERIES FULL LINE CATALOG 1007 — JUNE 2017
Eaton.com/bussmannseries
7-5
Power technology
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