Medium voltage fuses
Medium voltage fuses
American Fuses
Potential Transformer Fuses
(E-Rated)
2.4kV to 7.2 kV - A240T / A480T / A500 / A072T
POTENTIAL TRANSFORMER FUSES
Ferraz Shawmut E-rated PT fuses are current limiting fuses
with high interrupting rating, used for primary winding-
protection of potential transformers. They are small
dimension, ferrule-type fuses and mounted in standard
clips. Ratings are 1/2E to 5E at 2.4, 4.8, and 5.0 kV at
7,2kV rating are 1/2E to 3E
Features /Benefits
• Current limiting protection for transformers
• Ferrule mounting for ease of installation in
standard clips
• Compact size saves valuable mounting space
• Fiberglass body provides dimensional stability in
harsh industrial environments
• Metal embossed catalog number for lasting
identification
Highlights
• E-Rated
• Current-Limiting
Applications
Primary protection for 2.4, 4.8, 5.0 or 7.2kV
potential transformer
Ratings
A240T
AC:
1/2E to 5E
2400VAC, 50kA I.R. Sym.
A500T
AC:
1/2E to 5E
5000VAC, 50kA I.R. Sym.
A48OT
AC:
1/2E to 5E
4800VAC, 50kA I.R. Sym.
A720T
AC:
1E to 3E
7200VAC, 50kA I.R. Sym.
Dimensions
Catalog Number
Prefix
Dimensions - inches
A
B
C
Fuse Clips*
Centers Cat. NO.
A240T
A480T
A500T
A720T
4-5/8
5-5/8
5-5/8
9-1/2
13/16
13/16
1
13/16
5/8
5/8
9/16
5/8
4.0”
5.0”
5.0”
8.88”
CO8917P
CO8917P
-
CO8917P
Standard Fuse Ampere Ratings, Catalog and Reference Numbers
E-Rating
2400V
Catalog Number
4800V
5000V
7200V
2400V
Reference Number
4800V
5000V
7200V
1/2E
1E
2E
3E
4E
5E
A240T1/2E
A240T1E
A240T2E
-
-
A240T5E
A480T1/2E
A480T1E
A480T2E
A480T3E
A480T4E
A480T5E
A500T1/2E-1 A720T1/2E-1
A500T1E-1
A720T1E-1
A500T2E-1
A720T2E-1
A500T3E-1
A720T3E-1
A500T4E-1
-
A500T5E-1
-
P212855
P213867
A214383
-
-
Y214887
C215397
D215904
H216414
Q216927
C217444
M217959
S218470
D219515
X221970
G222715
W223234
W201568
Z203710
E211305
P211820
C212338
-
-
MV
71
12/04
Medium voltage fuses
Medium voltage fuses
American Fuses
Potential Transformer Fuses
(E-Rated)
2.4kV to 7.2 kV - A240T / A480T / A500 / A072T
A240T1/2E to 5E
MELTING TIME – CURRENT DATA - PT FUSES - 2400V
A480T1/2E to 5E
MELTING TIME – CURRENT DATA - PT FUSES - 4800V
TIME IN SECONDS
CURRENT IN AMPERES
TIME IN SECONDS
CURRENT IN AMPERES
12/04
MV
72
Medium voltage fuses
Medium voltage fuses
American Fuses
Potential Transformer Fuses
(E-Rated)
2.4kV to 7.2 kV - A240T / A480T / A500 / A072T
A500T1/2E-1 to 5E-1 Melting Time
Current Data - PT Fuses - 5000V
TIME IN SECONDS
A720T1E-1 and A720T2E-1
Melting Time – Current Data
PT Fuses - 7200V
CURRENT IN AMPERES
TIME IN SECONDS
CURRENT IN AMPERES
MV
73
12/04