Página 38 - elastimold

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H-98
Hi-Tech
®
FX Series Full-Range Current-Limiting Fuses
Power & High Voltage —
Elastimold
®
& Hi-Tech
®
Fuse Products
Nominal
Fuse
Voltage
Rating
(kV)
Fuse
Diameter
(in.)
Current
Rating
(Amps)
Fuse
cat. no.
Rated
Maximum
Voltage
(kV)
Maximum Continuous
Current (In Air)
(6)
Peak Arc
Voltage
(5)
(kV)
Minimum
Melt I
2
t
(AMP
2
-SEC)
Maximum
Melt I
2
t
(3) (4)
(AMP
2
-SEC)
RMAT
(8)
(°C)
25° C
40° C
55° C
23.0
2.2
6
HTFX250006
23.0
11.0
10.5
10.0
67
620
3,100
140
8
HTFX250008
13.5
13.0
12.5
61
800
4,800
10
HTFX250010
16.0
15.5
15.0
61
800
4,800
12
HTFX250012
20.5
19.5
19.0
60
920
8,300
18
HTFX250018
23.5
22.5
22.0
60
1,310
11,200
20
HTFX250020
27.5
26.5
25.5
60
1,620
13,000
25
HTFX250025
37.0
35.5
34.5
60
3,660
28,000
30
HTFX250030
41.0
39.5
38.5
60
5,250
38,000
40
HTFX250040
48.0
46.5
45.0
60
8,700
61,000
50
HTFX250050
55.0
53.0
51.5
60
12,800
82,000
Electrical Characteristics of Trans-Guard
®
FX Fuses (Parallel Fuses)
Nominal
Fuse
Voltage
Rating
(kV)
Fuse
Diameter
(in.)
Current
Rating
(Amps)
Fuse
cat. no.
Rated
Maximum
Voltage
(kV)
Maximum Continuous
Current (In Air)
(6)
Peak Arc
Voltage
(5)
(kV)
Minimum
Melt I
2
t
(AMP
2
-SEC)
Maximum
Melt I
2
t
(3) (4)
(AMP
2
-SEC)
RMAT
(8)
(°C)
25° C
40° C
55° C
8.3
2.2
60
HTFX230030
10.0
80.0
77.0
75.0
26
21,000
120,000
140
80
HTFX230040
98.0
95.0
92.0
26
34,000
180,000
100
HTFX230050
8.3
111.0
108.0
105.0
24
51,200
250,000
130
HTFX230065
8.8
170.0
165.0
160.0
22
136,000
670,000
160
HTFX230080
198.0
191.0
186.0
21
204,800
890,000
40
3.3
130
HTFX330065
8.3
158.0
154.0
151.0
24
100,800
400,000
71
160
HTFX330080
186.0
180.0
175.0
24
189,000
740,000
200
HTFX330100
235.0
229.0
221.0
24
313,000
1,300,000
250
HTFX330125
265.0
256.0
249.0
24
460,500
1,800,000
15.5
2.2
60
HTFX240030
17.2
80.0
77.0
75.0
45
21,000
110,000
140
80
HTFX240040
98.0
95.0
92.0
45
34,800
170,000
100
HTFX240050
104.0
101.0
98.0
45
51,200
310,000
3.3
130
HTFX340065
15.5
152.0
147.0
143.0
39
100,800
440,000
71
160
HTFX340080
172.0
167.0
160.0
39
157,500
740,000
200
HTFX340100
222.0
214.0
208.0
39
320,000
1,520,000
Electrical Characteristics of Trans-Guard
®
FX Fuses (Single Fuses)
(continued)
Notes for charts on pages H-97–H-98:
1. Designs have a 50,000 Amps RMS. Symmetrical Rating (except 3A 17.2kV, which was tested at 44kA maximum).
2. Current ratings shown in chart above are achieved by using a parallel combination of two fuses (order two fuses). To facilitate equal sharing of the
interrupting duty, the two fuses should be resistance matched (± 2%) and be mounted such that the current paths to and from each fuse are symmetrical.
3. Tabulated Maximum Total I
2
t values are for currents of 50,000 amperes at the nominal voltage of the fuse (except for fuses having a rated maximum
voltage of 8.8kV, in which case the maximum total I
2
t values are at 8.8kV). Fuses that have a rated maximum voltage higher than their nominal voltage
rating will have a higher I
2
t let-through when applied at voltages up to these higher values. For example, maximum total I
2
t values are increased by
approximately 30% when 8.3kV fuses are applied at 10kV and approximately 25% when 15.5kV fuses are used at 17.2kV.
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 quoted 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 higher ambient temperatures, and in confining enclosures:
These may be determined by derating the fuses by .2% per degree C over 25° C (for example, at 85° C the derating would be
60 x .2 = 12%, making the maximum continuous current of a 30A fuse 41 x .88 = 36.1A).
When fuses are applied in a confining enclosure, such as a drywell canister, additional derating of a fuse’s maximum continuous current is
necessary. Specifically, the maximum continuous current for fuses used in a dry-well canister, with the canister completely submerged in oil,
will be reduced by an additional 2% (3% for fuses having a rated maximum voltage of 8.8kV). When calculating the derating for temperature,
as described above, the temperature of the oil surrounding the canister should be used. For other types of enclosures, please consult the factory.
7. Reduction in the long time melting current of the fuses (approximately one hour and longer) due to higher ambient temperatures and use in enclosures
is the same as described above for “Maximum Continuous Current”. See time-current characteristics for melting characteristics in this time region.
8. The 2.2"-dia. 80A and 160A (paralleled 80A) fuses have an RMAT of 140° C at a reduced rated maximum voltage of 5.5kV.