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Elastimold
®
Fused Loadbreak Elbows (FLE)
Power & High Voltage —
Elastimold
®
& Hi-Tech
®
Fuse Products
Electrical Characteristics of Elastimold
®
EFX-E Elbow Fuses
System
Voltage
Class (kV)
Nominal
Fuse
Voltage
Rating (kV)
Current
Rating
(Amps)
Fuse
CAT. NO.
Rated
Maximum
Voltage (kV)
Maximum
Continuous Current
(2) (6) (7)
Peak Arc
Voltage
(kV)
(5)
Minimum
Melt I
2
t
(AMP
2
-SEC)
Maximum
Total I
2
t
(AMP
2
-SEC)
(3) (4)
25° C 40° C 65° C
3
EFX083003-E
4.3
4.2
3.9
30
100
350
6
EFX083006-E
9.5
9.0
8.5
32
620
2,700
8
EFX083008-E
11.5 11.0
10.5
28
800
4,000
10
EFX083010-E
14.0 13.5
13.0
28
800
4,000
12
EFX083012-E
19.0 18.5
17.5
26
920
8,000
18
EFX083018-E
10.0
21.0
20
19.0
26
1,310
9,500
15
8.3
20
EFX083020-E
26.0
25
24.0
26
1,620
11,000
25
EFX083025-E
34.0 33.0
31.0
26
3,660
22,000
30
EFX083030-E
37.5 36.5
34.5
26
5,250
30,000
40
EFX083040-E
43.0 42.0
40.0
26
8,700
50,000
45
EFX083045-E
49.0 47.0
45.0
26
12,800
70,000
65
EFX083065-E
8.8
70.0 68.0
64.5
23
34,000
200,000
80
EFX083080-E
80.0 77.5
73.5
22
51,200
280,000
25
15.5
6
EFX155006-E
15.5
8.5
8.0
7.7
52
620
3,000
8
EFX155008-E
10.5 10.0
9.5
40
800
4,300
10
EFX155010-E
13.0 12.5
12.0
40
800
4,300
12
EFX155012-E
16.0 15.5
15.0
38
920
8,000
18
EFX155018-E
20.0 19.5
18.5
38
1,620
13,000
20
EFX155020-E
23.5 22.5
21.5
38
2,200
16,500
3
EFX172003-E (1)
4.3
4.2
3.9
51
100
510
6
EFX172006-E
9.5
9.0
8.5
54
620
3,250
8
EFX172008-E
11.5 11.0
10.5
46
800
4,600
10
EFX172010-E
14.0 13.5
13.0
46
800
4,600
12
EFX172012-E
18.0 17.5
16.5
43
920
8,500
25/28
17.2
18
EFX172018-E
17.2
20.0 19.5
18.5
45
1,310
10,000
20
EFX172020-E
24.0 23.0
22.0
45
1,620
12,500
25
EFX172025-E
31.5 30.5
29.0
45
3,660
27,500
30
EFX172030-E
35.5 34.5
32.5
45
5,250
37,500
40
EFX172040-E
41.0 40.0
38.0
45
8,700
62,500
45
EFX172045-E
46.0 45.0
42.5
45
12,800
87,500
Notes:
1. Designs have a 50,000A RMS Symmetrical Rating (except 3A, 17.2kV — which was tested at 44kA maximum).
2. Fuses have a Rated Maximum Application Temperature (RMAT) of 65° C. RMAT is the maximum temperature of the air, in contact with the elbow housing,
at which fuses have been shown to be suitable for use.
3. Tabulated Maximum Total I
2
t values are for currents of 50,000A at the nominal voltage of the fuse. Values for 8.3kV fuses at 10kV are approximately 30% higher.
Values for 17.2kV fuses at 15.5kV are approximately 20% lower.
4. Maximum total I
2
t values are reduced for currents below 50,000A. For example, at 10,000A, maximum total I
2
t values are approximately 15% less than the published values.
5. Peak arc voltages listed are for 50,000A currents at the rated maximum voltage listed. Reduced currents and voltages will reduce the peak arc voltage.
Consult the factory for further information.
6. Maximum continuous currents at ambient temperatures other than those listed may be determined by derating the fuses by .2% per degree C over 25° C.
For example: At 40° C the derating would be 15 x .2 = 3%, making the maximum continuous current of a 17.2kV, 25A fuse 31.5 x .97 = 30.5A.
7. Time-current characteristic curves are published at 25° C. Reduction in the long time melting current of the fuses (approximately one hour and longer) due to higher
ambient temperatures is the same as described above for “Maximum Continuous Currents.”