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Bussmann
?
Ferrule
FWP 660V/700V (IEC/U.L.)
1-50A
?
Electrical Characteristics
I 2 t (A 2 S)
Rated
Ordering Information
Carton
Dimensions
Curves
Current Clearing
Watts
Part
Carton
Weight
Figure
Size
RMS-Amps Pre-arc at 660V
Loss
Number
Qty.
(kg)
Number
BIF #
1 — —
2 — —
3 — —
4 — —
5 1.6 11
6 — —
—
—
—
—
1.5
—
FWP-1A14F
FWP-2A14F
FWP-3A14F
FWP-4A14F
FWP-5A14F
FWP-6A14F
14 ≈ 51mm 10 3.6 22
(·??§∑) 15 10 75
4
5.5
FWP-10A14F
FWP-15A14F
10
0.225
Fig. 1
35785307
20 26 180
25 44 320
30 58 450
32 68 600
40 84 750
50 200 1800
6
7
9
7.6
8
9
FWP-20A14F
FWP-25A14F
FWP-30A14F
FWP-32A14F
FWP-40A14F
FWP-50A14F
Interrupting rating 200kA RMS Symmetrical.
Watts loss provided at rated current.
(700 Vdc/Interrupting rating 50kA) U.L. Recognition.
CSA Component Acceptance: 5 - 30A.
R
Dimensions
Fig. 1: 1-50 Amp Range
50.8
14.3
(2.000")
(0.563")
15.5
(0.610")
Dimension in mm.
1mm = 0.0394∑ 1∑ = 25.4mm
Electrical Characteristics
1 kg = 2.2 lbs.
1 lb = 0.45 kg
Total Clearing I 2 t
The total clearing I 2 t at rated voltage and
at power factor of 15% are given in the
electrical characteristics. For other volt-
ages, the clearing I 2 t is found by multi-
plying by correction factor, K , given as
a function of applied working voltage,
E g , (RMS).
Arc Voltage
This curve gives the peak arc voltage,
U L , which may appear across the fuse
during its operation as a function of the
applied working voltage, E g , (RMS) at a
power factor of 15%.
Power Losses
Watts loss at rated current is given in
the electrical characteristics. The curve
allows the calculation of the power
losses at load currents lower than the
rated current . The correction factor, K p ,
is given as a function of the RMS load
current, I b , in % of the rated current .
1.4
1.2
K
1.4
1.2
U L
1.0
0.8
K p
1.0
0.9
0.8
0.7
0.6
10 3
9
8
7
6
0.6
0.5
0.4
0.3
0.5
1)
5
0.2
0.4
0.3
2)
E g
4
3
E g
0.1
I b
200
300
400
500
600
700
200
300
400
500
600
700
30 40 50
60
70
80 90 100%
1) 5-30 Amp Range
2) 32-50 Amp Range
The only controlled copy of this BIF document is the electronic read-only version located on the Bussmann
Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is intended to clearly
present comprehensive product data and provide technical information that will help the end user with design
7-18-01
SB01191
applications. Bussmann reserves the right, without notice, to change design or construction of any products and
to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without
notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested
by the user in all possible applications.
Form No.
Page 1 of 1
BIF Doc #720025
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