Bussmann
Ferrule
®
FWP 660V/700V (IEC/U.L.)
Electrical Characteristics
I
2
t (A
2
S)
Rated
Current
Clearing
RMS-Amps
Pre-arc
at 660V
Watts
Loss
20-100A
Ordering Information
Part
Number
Carton
Qty.
Carton
Weight
(kg)
Dimensions
Figure
Number
®
Curves
Size
BIF #
20
23
260
25
37
410
32
55
605
22 ≈ 58mm
40
68
750
(‡Ω•∑)
50
155
1600
63
280
3080
80
600
6600
100
1100
12500
Interrupting rating 200kA RMS Symmetrical.
Watts loss provided at rated current.
(500 Vdc/Interrupting rating 50kA) U.L. Recogition.
4.6
5.6
7.0
8.5
9.5
11
13.5
16
FWP-20A22F
FWP-25A22F
FWP-32A22F
FWP-40A22F
FWP-50A22F
FWP-63A22F
FWP-80A22F
FWP-100A22F
10
0.450
Fig. 1
35785291
1 kg = 2.2 lbs.
1 lb = 0.45 kg
Dimensions
Fig. 1: 20-100 Amp Range
58.0
(2.283")
22.2
(0.875")
15.0
(0.591")
Dimension in mm.
1mm = 0.0394∑
1∑ = 25.4mm
Electrical Characteristics
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).
1.4
1.2
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
200
E
g
300
400
500
600
700
K
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 .
1.0
K
p
0.8
0.6
0.5
0.4
0.3
0.2
1.4
1.2
10
3
9
8
7
6
5
4
U
L
E
g
3
200
300
400
500
600
700
0.1
30 40 50
I
b
60
70
80 90 100%
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 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.
7-18-01
SB01191
Form No. FWP
Page 1 of 1
BIF Doc #720026
京公网安备 11010802033920号
EEWORLD
