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United States
Tel: 901.252.8000
800.816.7809
Fax: 901.252.1354
Technical Services
Tel: 888.862.3289
www.tnb.com
H-65
Elastimold
®
Fused Loadbreak Elbows (FLE)
Power & High Voltage —
Elastimold
®
& Hi-Tech
®
Fuse Products
Notes:
1. Column A = 140–200% of transformer rating and Column B = 200–300% of transformer rating.
2. Ratings in parenthesis are 17.2kV fuses.
3. 8.3kV, 3–45A fuses and 15.5kV, 6–20A fuses are used in the small (size 1) elbow housing; 8.3kV, 65–80A fuses and 17.2kV, 3–45A fuses are used in the large (size 3) elbow fuse housing.
4. Recommended fuses meet inrush criteria of 12 times transformer full-load current for .1 second and 25 times transformer full-load current for .01 second. Fuses also meet cold-load pickup
criteria of 6 times transformer full-load current for 1 second and 3 times transformer full-load current for 10 seconds.
a. Fuse allows greater than 300% of transformer rating.
Recommended Elastimold
®
EFX-E Elbow Fuse at 40
°
C Ambient Temperature (3-Phase Transformer)
Recommended Fuse Current Ratings (Amperes)
Fuse Voltage
8.3kV
15.5kV (17.2kV)
3-Phase
gndY-gndY
Transformer kVA
Transformer 3-Phase Voltage Rating (kV), Phase to Phase
2.4
4.16
4.8
7.2–7.96
8.32
12.47
13.2–14.4
20.8
22.9–24.9
A
B A B A B A B A B A B A B A B A B
15
— 6
— 3
— 3
— 3
a
— 3
a
— 6
a
— 6
a
— 6
a
— (3
a
)
22.5
— 8
— 6
a
— 6
a
— 3
— 3
— 6
a
— 6
a
— 6
a
— (3
a
)
30
10
12 — 6
— 6
— 6
a
— 3
— 6
a
— 6
a
— 6
a
— (3
a
)
45
12
20 — 10 — 8
— 6
— 6
a
— 6
a
— 6
a
— 6
a
— (3
a
)
75
20
30 12 20 — 12 — 8
— 8
— 6
— 6
— 6
a
— (3)
100
30
45 18 25 18 20 — 12 — 10 — 8
— 8
— 6
a
— (6
a
)
112.5
40
65 20 25 18 25 — 12 — 12 — 8
— 8
— 6
— (6
a
)
150
45
80 25 40 20 30 18 20 12 20 10 12 10 12 — 6
— (6)
200
65
80 40 65 30 45 20 25 18 25 12 18 12 18
8
10 — (8)
225
80
— 45 65 40 65 20 30 20 25 12 20 12 18
8
10 — (10)
300
— — 65 80 45 80 30 45 25 40 18 25 18 25 12 18 — (12)
500
— — — — 80 — 65 80 45 80 30 45 30 45 18 (25)
(18)
(25)
750
— — — — — — 80 — 80 — 45 65 45 — (25)
(45)
(25)
(40)
1,000
— — — — — — — — — — 80 — — — (40)
— (40)
Recommended Elastimold
®
EFX-E Elbow Fuse at 40° C Ambient Temperature (Single-Phase Transformer)
Fuse Voltage
Recommended Fuse Current Ratings (Amperes)
8.3kV
15.5kV (17.2kV)
1-Phase
Transformer
kVA
Transformer 1-Phase Voltage Rating (kV) Phase-to-Ground
2.4
4.16
4.8
7.2
7.62
12
14.4
16
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
10
— 6
— 6
a
— 3
— 3
— 3
— 6
a
— 6
a
— (3
a
)
15
— 10
— 6
— 6
a
— 3
— 3
— 6
a
— 6
a
— (3
a
)
25
12
20
— 8
— 8
— 6
— 6
— 6
a
— 6
a
— (3)
37.5
20
25
— 12
— 12
— 8
— 6
— 6
— 6
a
— (6
a
)
50
25
40
18
20
12
20
10
12
— 10
— 6
— 6
— (6
a
)
75
45
65
20
30
20
25
12
20
12
18
— 10
— 8
— (8)
100
65
80
30
45
25
40
18
25
18
25
12
18
10
12
— (10)
167
— — 65
80
45
65
25
45
25
45
18
(25)
18
20
(12)
(20)
250
— — 80
— 80
— 45
65
45
65
(25)
(45)
20
(30)
(20)
(30)
333
— — — — — — 65
— 80
— (40)
— (30)
(45)
(25)
(45)
500
— — — — — — — — — — — — (45)
— (45)