Bussmann
British Style BS 88
®
†
®
Ordering Information
Watts
Loss
Part
Number
Carton
Qty.
Carton
Weight
(kg)
Dimensions
Figure
Number
Curves
690V
Type
Rated
Current
RMS-Amps
6-700A
Electrical Characteristics
I
2
t (A
2
S)
Clearing
Clearing
Pre-arc
at 415V
at 660V
BIF #
6
10
CT
12
16
20
25
32
35
40
ET
45
56
63
80
35
40
45
50
FE
63
71
80
90
100
90
110
EET
140
160
100
120
140
FEE
160
180
200
180
200
225
FM
250
280
315
350
400
450
500
FMM
550
630
700
160
180
200
MT††
250
280
315
355
180
200
225
280
315
355
MMT††
400
450
500
560
630
710
† U.L Recognition on CT,
1.8
7
10
16
32
25
32
52
103
103
135
171
360
33
52
76
103
135
210
250
360
470
490
600
1050
1500
400
540
850
1000
1400
1900
1400
2600
3700
5200
7000
10000
15000
10000
15000
20000
30000
45000
60000
2400
3800
6000
11500
16500
19000
22000
1650
2200
3700
6600
8600
13500
21000
30000
42000
60000
68500
78000
ET, FE, EET,
8.5
12
30
48
40
65
66
110
150
220
150
250
190
350
310
500
600
900
680
1100
950
1500
1200
2000
2500
4000
130
200
180
300
270
450
380
600
480
750
600
950
900
1500
1300
2100
1800
2800
3000
4500
4000
6500
7000
12000
10000
17000
1600
2400
1900
3100
2500
3800
3700
5700
5300
8400
7100
11400
7500
13500
10500
18500
14500
26500
20500
37500
30500
55000
40000
77000
60000
105000
40000
72500
60000
105000
82000
150000
120000
215000
180000
310000
245000
420000
15000
25000
25000
38000
40000
58000
80000
110000
100000
150000
125000
180000
160000
200000
12000
18000
16000
23000
26000
40000
47000
70000
62000
91000
97000
140000
150000
220000
220000
320000
300000
450000
430000
640000
500000
720000
600000
850000
FEE, FM, & FMM.
2
3
3
7
7
7
11
11
9
11
14
16
18
9
9
11
11
12
17
20
20
23
19
27
35
39
24
32
36
46
46
52
40
40
44
48
48
55
55
85
90
100
100
100
120
26
26
27
32
35
42
51
42
42
42
47
51
54
60
57
64
64
86
105
6CT
10CT
12CT
16CT
20CT
25ET
32ET
35ET
40ET
45ET
56ET
63ET
80ET
35FE
40FE
45FE
50FE
63FE
71FE
80FE
90FE
100FE
90EET
110EET
140EET
160EET
100FEE
120FEE
140FEE
160FEE
180FEE
200FEE
180FM
200FM
225FM
250FM
280FM
315FM
350FM
400FMM
450FMM
500FMM
550FMM
630FMM
700FMM
160MT
180MT
200MT
250MT
280MT
315MT
355MT
180MMT
200MMT
225MMT
280MMT
315MMT
355MMT
400MMT
450MMT
500MMT
560MMT
630MMT
710MMT
20
0.160
Fig. 1
35785312
10
0.420
Fig. 2
10
0.420
Fig. 2
35785314
5
0.450
Fig. 3
35785313
5
0.450
Fig. 3
35785292
1
0.240
Fig. 4
35785314
1
0.450
Fig. 5
35785292
1
0.260
Fig. 4
35785313
1
.0470
Fig. 5
35785311
1 kg = 2.2 lbs
1 lb = 0.45 kg
†† 350 Vdc (IEC) rating. Consult Bussmann for U.L. Recognition status.
Interrupting rating 200kA RMS Symmetrical.
(500 Vdc/Interrupting rating 50ka) U.L. Recognition for CT, ET, FE, EET, FEE, FM & FMM.
Watts loss provided at rated current.
Note: FC, 8ET, 12ET, 15ET, 20ET, 65EET and 75EET are available for replacement purposes on existing equipment.
7-18-01
SB01191
Form No.
Page 1 of 2
BIF Doc #720024
Bussmann
British Style BS 88
®
690V
6-700A
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
500
0.4
0.2
200
1)
2)
E
g
300
400
500
600 660
200
400
1) CT, ET, EET, FE, FEE, MT, MMT
2) FM, FMM
1) CT
2) ET, FE, EET, FEE, FM, FMM
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
1500
U
L
1)
0.6
0.5
0.4
0.3
0.2
1000
2)
E
g
600 660
0.1
30 40 50
60
70
I
b
80 90 100%
Dimensions
Fig. 1: CT
4
5.5
Fig. 2: ET, FE
7.1
Fig. 3: EET, FEE
8.7
54.8 64.3 74.6
48 63.5 77
46 70 94
11.9
9.7
6.4
8.7
8.7
12.7
17.1
31.8
37
19
Fig. 4: FM, MT
25.4
19.1
Fig. 5: FMM, MMT
25.4
50
50
A
113
14
13.5
10.3
10.3
A
113
Type
FM
FMM
MT
MMT
“A”
Dimension
80-85
80-85
85
85
83
41
38.1
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 #720024
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