Bussmann
British Style BS 88
®
240V
6-900A
Electrical Characteristics
I
2
t (A
2
S)
Clearing
Clearing
Pre-arc
at 120V
at 240V
Ordering Information
Watts
Loss
Part
Number
Carton
Qty.
Carton
Weight
(kg)
Dimensions
Figure
Number
®
Curves
Type
Rated
Current
RMS-Amps
BIF #
LCT
LET
LMT
LMMT
6
10
12
16
20
25
32
35
50
63
80
100
125
160
180
160
200
250
315
355
400
450
400
500
630
710
800
900
2
3.8
7
20
25
18
32
50
100
180
300
600
600
1100
1600
1100
1500
3200
6000
8000
14000
18000
6000
14000
24000
32000
52000
75000
6
12
22
50
80
120
200
320
500
1100
1900
3800
3800
7000
12000
7000
10000
20000
35000
50000
70000
100000
35000
80000
150000
200000
300000
400000
9
22
32
100
160
250
450
600
1400
2200
3800
7500
7500
16000
29000
16000
20000
40000
75000
100000
160000
220000
80000
170000
300000
460000
600000
800000
1.0
2.5
2.5
2.5
4.0
4.0
5.0
5.0
7.0
9.0
10.0
10.0
16.0
20.0
21.0
17.0
28.0
28.0
35.0
35.0
40.0
42.0
60.0
64.0
75.0
77.0
82.0
97.0
6LCT
10LCT
12LCT
16LCT
20LCT
25LET
32LET
35LET
50LET
63LET
80LET
100LET
125LET
160LET
180LET a
160LMT
200LMT
250LMT
315LMT
355LMT
400LMT
450LMT
400LMMT
500LMMT
630LMMT
710LMMT
800LMMT
900LMMT
20
0.110
Fig. 1
35785296
10
0.310
Fig. 2
35785293
1
0.180
Fig. 3
35785294
1
0.370
Fig. 4
35785295
Interrupting rating 200kA RMS Symmetrical.
150 Vdc rating
Watts loss provided at rated current.
Note: 7LET, 10LET, 12LET and 16LET are available for replacement purposes on existing equipment.
All fuses above have been tested at 318 Vac.
See accessories on page 72.
1 kg = 2.2 lbs
1 lb = 0.45 kg
Dimensions
Fig. 1: LCT
4
5.5
Fig. 2: LET
7.1
28 38 47
26.2 41.8 56
9.7
6.4
8.4
8.7
Dimensions in mm.
1mm = 0.0394∑
1∑ = 25.4mm
12.7
17.7
19.1
7-18-01
SB01191
Form No.
Page 1 of 2
BIF Doc #720004
Bussmann
British Style BS 88
®
240V
6-900A
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%.
®
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).
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
50
2)
100
150
200
E
g
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
K
750
U
L
1)
500
2)
1)
0.6
0.5
0.4
0.3
0.2
250
E
g
100
200
300
0.1
30 40 50
60
70
I
b
80 90 100%
250
1) LCT
2) LET, LMT, LMMT
1) LCT
2) LET, LMT, LMMT
Dimensions
25.4
25.4
Fig. 3: LMT
Fig. 4: LMMT
31 59
84
31
59
84
13.5
10.3
13.5
10.3
83
41
38.1
Indicator (Optional)
Dimensions in mm.
1mm = 0.0394∑
1∑ = 25.4mm
38
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.
Page 2 of 2
BIF Doc #720004
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