Medium Voltage Fuses
Potential transformer fuses
Ratings:
AB, AM and
E-Rated: — See single asterisk in Basic Catalog Numbers
table
CAV
Volts:— 3.6-38kV (See Basic Catalog Numbers table)
Amps:— 2-15A (See Basic Catalog Numbers table)
IR:— 25-80kA (See Basic Catalog Numbers table)
Agency Information: BS2692-1 and IEC60282-1
Specifications
Features and Benefits
• Physically dimensioned for retrofitting in existing hardware.
• Space saving size.
Description: British Standard VT fuses with low current
ratings for use in voltage transformers or operating
transformers to provide isolation of the associated system in
the event of faults in the transformer circuit.
Typical Applications
• Medium Voltage Potential Transformers
• Small Medium Voltage Service Transformers
Dimensions: See Basic Catalog Numbers table.
Basic Catalog Numbers for “AB” & “AM” Series
Basic Cat.
Numbers
Dimensions - in (mm)
Volts
3.6kV
3.6kV
5.5kV
5.5kV
7.2kV
7.2kV
12.0kV
15.5kV
17.5kV
24.0kV
36.0kV
Amp Ratings
3.15, 6.3
3.15, 6.3, 10
0.5, 1, 2, 3, 5
0.5, 1.0, 2.0, 3.0, 4.0, 5.0
3.15, 6.3
3.15, 6.3
3.15
3.15
3.15
3.15
3.15
Type
AB
AB
AB
AM
AB
AB
AB
AB
AB
AB
AB
Length
Diameter
IR
ABWNA
ABCNA
ABWNA*
AMWNA*
ABWNA
ABCNA
ABCNA
ABFNA
5.6 (142.2)
7.69 (195.3)
5.6 (142.2)
5.6 (142.2)
5.6 (142.2)
7.69 (195.3)
7.69 (195.3)
10.00 (254)
14.13 (358.9)
14.13 (358.9)
14.13 (358.9)
1 (25.4)
1 (25.4)
1 (25.4)
0.81 (20.6)
1 (25.4)
1 (25.4)
1 (25.4)
1 (25.4)
1 (25.4)
1 (25.4)
1 (25.4)
50KA
50KA
50KA
50KA
45KA
45KA
45KA
32KA
35KA
25KA
31.5KA
ABGNA
ABGNA
ABGNA**
Recommended fuse clip for 1 diameter fuses – A3354705.
Basic Catalog Numbers for “CAV” Series
Basic Cat.
Number
Amp
Dimensions - in (mm)
Volts
3.6kV
5.5kV
5.5kV
7.2kV
12kV
Ratings
2
15
0.5, 1, 2
2, 10
Length
Diameter
IR
CAV
8.66 (220)
1.63 (41.4)
1.63 (41.4)
1.63 (41.4)
1.63 (41.4)
1.63 (41.4)
1.63 (41.4)
1.63 (41.4)
1.63 (41.4)
1.63 (41.4)
1.63 (41.4)
1.63 (41.4)
1.63 (41.4)
1.63 (41.4)
50KA
50KA
50KA
40KA
40KA
80KA
80KA
40KA
40KA
40KA
40KA
40KA
40KA
CAV*
CAVH*
CAV
7.375 (187.3)
7.375 (187.3)
8.66 (220)
CAV
2
8.66 (220)
CAV*
CAVH*
CAV
CAV
CAV
15.5kV
15.5kV
17.5kV
24kV
0.5, 1, 2, 3, 7
0.5, 1, 2
2, 4, 6, 10
2, 3, 4
2, 4
12.87 (326.9)
12.87 (326.9)
8.66 (220)
13.39 (340.1)
17.32 (439.9)
17.32 (439.9)
17.32 (439.9)
17.32 (439.9)
36kV
CAVH
CAV*
CAVH*
36kV
38kV
38kV
2
4
0.5, 1, 2
Type CAVH are fitted with a striker pin for indication.
* E-Rated fuses
**For clean indoor applications only.
Catalog Number Build-A-Code
kV
Basic Catalog Number
Amps
_ _ _
_ _ _ _ _ _ _ _
Recommended Fuse Clips: 1” dia. - A3354705, 1.63” dia. - 1A0835, .819 dia. - 1A1837
Contact Cooper Bussmann for complete specifications on Potential Transformer Fuses
For product Data Sheets, visit www.cooperbussmann.com/products/datasheet.asp
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