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72
Medium Voltage Fuses
E-rated fuses: CL-14
Catalog Number Cross Reference
Cooper Bussmann Ferraz-Shawmut Ferraz-Shawmut
Catalog Numbers New Catalog # Old Catalog #
ECL155-10E A155C1DORO-10E 225-007-967
ECL155-15E A155C1DORO-15E 225-007-968
ECL155-20E A155C1DORO-20E 225-007-969
ECL155-25E A155C1DORO-25E 225-007-970
ECL155-30E A155C1DORO-30E 225-007-971
ECL155-40E A155C1DORO-40E 225-007-972
ECL155-50E A155C1DORO-50E 225-007-973
ECL155-65E A155C1DORO-65E 225-007-974
ECL155-80E A155C1DORO-80E 225-007-975
ECL155-100E A155C1DORO-100E 225-007-976
ECL155-125E A155C2DORO-125E 225-007-977
ECL155-150E A155C3DORO-150E 225-007-978
ECL155-200E A155C3DORO-200E 225-007-979
ECL155-250E A155C3DORO-250E 225-007-980
ECL155-300E A155C3DORO-300E 225-007-981
Data Sheet: 9004
Catalog Numbers
Catalog Amp IR Voltage # of
Numbers Rating Voltage Max Sym. Barrels Style
ECL155-10E 10 15.5kV 63KA 1 Clip-Lock
ECL155-15E 15
ECL155-20E 20
ECL155-25E 25
ECL155-30E 30
ECL155-40E 40
ECL155-50E 50
ECL155-65E 65
ECL155-80E 80
ECL155-100E 100
ECL155-125E 125
ECL155-150E 150 2
ECL155-200E 200
ECL155-250E 250 50kA
ECL155-300E 300
Catalog Number Construction (Example)
Catalog Number Voltage Rating Ampere Rating
ECL 155 300E
155 = 15.5 kV
ECL155
Specifications
Description: E-rated medium voltage, current-limiting fuses
for transformer and feeder protection.
Construction: Filament wound, glass epoxy fuse tube, with
silica filler, and silver-plated copper terminals and endcaps
containing a silver element in a double concentric helical con-
figuration.
Ratings:
Volts: — 15.5kV
Amps: — 10-300A
IR: — 63kA Sym. (10-200A)
— 50kA Sym. (250-300A)
Agency Information: Meets E requirements per ANSI
C37.46, Meets General Purpose requirements per ANSI
C37.40.
Features and Benefits
• Clip-lock double barrel fuse design assures positive installa-
tion
• The filament wound, glass epoxy fuse tube provides UV and
moisture protection, making these medium voltage fuses
suitable for both indoor and outdoor applications
• Open fuse indication (indicator travel distance is 16mm) easi-
ly integrates into automation schemes
• 50/60 Hz operating frequency make these fuses applicable
world-wide
Typical Applications
• 15.0 kV Transformer Primary Protection
• 15.0 kV Feeder Circuit Protection
• 15.0 kV Voltage Switches
• 15.0 kV Metal-enclosed Switchgear
Current-limiting medium voltage fuses are classified
into three categories:
1. Full Range - defined by ANSI as “a fuse capable of inter-
rupting all currents from the maximum rated interrupting cur-
rent down to the minimum continuous current that causes
melting of the fusible element(s), when the fuse is applied at
the maximum ambient temperature specified by the manufac-
turer.” It is able to interrupt any normal 60 cycle current that
will melt its element.
2. General Purpose - defined by ANSI C37.40 as “a fuse
capable of interrupting all currents from the maximum rated
interrupting current down to the current that causes melting of
the fusible element in one hour.” Not all currents fall within
this range. It is possible to receive an overcurrent lower than
the value given by the one hour criterion.
3. Back-up - defined by ANSI C37.40 as “a fuse capable of
interrupting all currents from the maximum rated interrupting
current down to the rated minimum interrupting current.” The
minimum rated 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 in series with the
back-up rated fuse.
15.5kV
63kA
1
Clip-Lock
2
50kA
