12-28-98
SB98107
Rev. A
Form No. FWA 150
Page 1 of 2
BIF Doc #720002
Bussmann
FWA 150V
70-1000A
Electrical Characteristics
I
2
t (A
2
Sec)
Ordering Information
Dimensions
Curves
Rated
Current
RMS-Amps
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1000
170000
510000
60.0
n
Interrupting rating 100kA RMS Symmetrical.
n
Watts loss provided at rated current.
n
150 Vdc U.L. Recognition on 70 through 800 amperes only. Consult Bussmann for additional ratings.
n
See accessories on page 20.
Carton
Weight
(lbs)
See Page
or
(BIF #)
Clearing
at 150V
Watts
Loss
Part
Number
FWA-1000A
Carton
Qty.
Figure
Number
Type
Pre-arc
1
0.18
Fig. 1
FWA
150V
page 21
(35785310)
5
2.42
Fig. 2
1 kg = 2.2 lbs 1 lb = 0.45 kg
150
102
70
22
1.5
1.0
0.5
0.3
0.2
0.15
Eg
K
1)
2)
U
L
E
g
200
100
100
150
50
300
K
p
1.0
0.8
0.6
0.4
0.5
0.3
0.2
0.1
30 40 50
60
70
80
90 100%
I
b
1) 500-1000 Amp Range
2) 70-400 Amp Range
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.
Electrical Characteristics