FWH-900A Datasheet, PDF (2/2 Pages) Cooper Bussmann, Inc. – Electrical Characteristics

Bussmann^®
FWH 500V 35-1600A
†
R
®
Electrical Characteristics
Total Clearing I²t
The total clearing I²t at rated voltage and
at power factor of 15% are given in the
electrical characteristics. For other volt-
ages, the clearing I²t 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%.
1.5
K
1.0
0.5
1)
0.3
0.2 ₂₎
0.15
Eg
100 250
400 500
1) 35-800 Amp Range
2) 1000-1600 Amp Range
2.0
U_L
1.6
1.2
10³
800
600 ₂₎
500
1)
400
300
E_g
100 200 300 400 500
1) 35-200 & 1000-1600 Amp Range
2) 225-800 Amp Range
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 _Kp
0.8
0.6
0.5
0.4
0.3
0.2
0.1
I_b
30 40 50 60 70 80 90 100%
Dimensions
Fig. 1: 35-1200 Amp Range
A
D
E
C
GF
H
B
J
Fig. 2: 1400-1600 Amp Range
0.125
10.219
0.5 3.219
0.625
3.5
1.625
1.750
6.219
8.969
0.75
4.25
Order #
Fig.
FWH-35B-60B
1
FWH-70B-100B
1
FWH-125B-200B 1
FWH-225A-400A 1
FWH-450A-600A 1
FWH-700A-800A 1
FWH-1000A-1200A 1
FWH-1400A-1600A 2
Dimension in inches.
1mm = 0.0394∑ 1∑ = 25.4mm
A
3.188
3.625
3.625
4.340
4.340
6.340
6.969
B
0.813
0.947
1.156
1.500
2.000
2.500
3.000
C
1.593
1.736
1.836
2.090
2.090
2.090
3.219
D
E
2.541
2.193
2.853
2.807
2.892
2.768
3.440
2.750
3.530
2.780
4.970
3.440
5.465
4.475
See Drawing
F
0.344
0.352
0.344
0.410
0.410
0.530
0.625
G
0.719
0.750
1.000
1.000
1.500
2.000
2.375
H
0.125
0.125
0.188
0.250
0.250
0.380
0.438
J
0.518
0.375
0.406
0.750
0.780
1.300
1.120
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.
7-11-01
SB01191
Form No. FWH 500
Page 2 of 2
BIF Doc #720007